lisp - uclouvain · 6/28/2010  · lisp (locator/identifier separation protocol) department of...

241
LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe, 2, B-1348, Louvain-la-Neuve (Belgium) Damien Saucez* http://inl.info.ucl.ac.be June 28 th , 2010 *Thanks to Olivier Bonaventure and Pierre François Monday 28 June 2010

Upload: others

Post on 24-Mar-2020

11 views

Category:

Documents


0 download

TRANSCRIPT

Page 1: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP(Locator/Identifier Separation Protocol)

Department of Computing Science and Engineering Université catholique de Louvain (UCL)

Place Sainte-Barbe, 2, B-1348, Louvain-la-Neuve (Belgium)

Damien Saucez*

http://inl.info.ucl.ac.be

June 28th, 2010

*Thanks to Olivier Bonaventure and Pierre François

Monday 28 June 2010

Page 2: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Agenda

• The Internet is evolving

• Separating Identifiers from Locators

• LISP, a network-based Loc/ID split solution

• LISP in a nutshell

• How LISP has been obtained?

• Conclusion

2

Monday 28 June 2010

Page 3: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

The Internet is evolving(does it like?)

3

Monday 28 June 2010

Page 4: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

More networks

Linear growth of Autonomous Systems

4 [http://bgp.potaroo.net]Monday 28 June 2010

Page 5: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

More prefixes

[http://bgp.potaroo.net]

Exponential growth of prefixes

5

Monday 28 June 2010

Page 6: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

• Distribution of prefixes versus length (filtered)

What do the entries look like?

/8 /9 - /15 /16 /17 /18 /19/20 /21 /22 /23 /24

6

Monday 28 June 2010

Page 7: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

• Distribution of prefixes versus length (filtered)

What do the entries look like?

/8 /9 - /15 /16 /17 /18 /19/20 /21 /22 /23 /24

Half of the prefixes are as small as possible!

6

Monday 28 June 2010

Page 8: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Why so may (small) prefixes? (1)

My provider #1

My provider #2

ME

130.104.0.0/16

130.104.0.0/16

130.104.0.0/16

130.104.0.0/16

130.104.0.0/16

• Multihoming is common (16k÷23k stubs are multihomed)

130.104.1.1

7

Monday 28 June 2010

Page 9: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Why so may (small) prefixes? (1)

My provider #1

My provider #2

ME

130.104.0.0/16

130.104.0.0/16

130.104.0.0/16

130.104.0.0/16

130.104.0.0/16

• Multihoming is common (16k÷23k stubs are multihomed)

130.104.1.1

7

Monday 28 June 2010

Page 10: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Why so may (small) prefixes? (1)

My provider #1

My provider #2

ME

130.104.0.0/16

130.104.0.0/16

130.104.0.0/16

130.104.0.0/16

130.104.0.0/16

• Multihoming is common (16k÷23k stubs are multihomed)

130.104.1.1

7

Monday 28 June 2010

Page 11: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Why so may (small) prefixes? (1)

My provider #1

My provider #2

ME

130.104.0.0/16

130.104.0.0/16

130.104.0.0/16

• Multihoming is common (16k÷23k stubs are multihomed)

130.104.1.1

7

Monday 28 June 2010

Page 12: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Why so may (small) prefixes? (1)

My provider #1

My provider #2

ME

130.104.0.0/16

130.104.0.0/16

130.104.0.0/16

• Multihoming is common (16k÷23k stubs are multihomed)

130.104.1.1

7

Monday 28 June 2010

Page 13: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Why so may (small) prefixes? (2)

My provider #1

My provider #2

ME

130.104.0.0/16

130.104.0.0/17

130.104.0.0/17

130.104.128.0/17

130.104.0.0/17

130.104.128.0/17

130.104.128.0/17

• Traffic engineering

130.104.1.1

8

Monday 28 June 2010

Page 14: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Why so may (small) prefixes? (2)

My provider #1

My provider #2

ME

130.104.0.0/16

130.104.0.0/17

130.104.0.0/17

130.104.128.0/17

130.104.0.0/17

130.104.128.0/17

130.104.128.0/17

• Traffic engineering

130.104.1.1

8

Monday 28 June 2010

Page 15: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Why so may (small) prefixes? (2)

My provider #1

My provider #2

ME

130.104.0.0/16

130.104.0.0/17

130.104.0.0/17

130.104.128.0/17

130.104.128.0/17

130.104.128.0/17

• Traffic engineering

130.104.1.1

8

Monday 28 June 2010

Page 16: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Why so may (small) prefixes? (2)

My provider #1

My provider #2

ME

130.104.0.0/16

130.104.128.0/17

130.104.128.0/17

130.104.128.0/17

• Traffic engineering

130.104.1.1

8

Monday 28 June 2010

Page 17: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Why so may (small) prefixes? (2)

My provider #1

My provider #2

ME

130.104.0.0/16

130.104.128.0/17

130.104.128.0/17

130.104.128.0/17

• Traffic engineering

130.104.1.1

8

Monday 28 June 2010

Page 18: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Why so may (small) prefixes? (3)

My provider #1

My provider #2

ME

130.104.0.0/16

130.104.0.0/17130.104.0.0/16

130.104.0.0/17130.104.0.0/16

130.104.128.0/17130.104.0.0/16

130.104.0.0/17130.104.0.0/16

130.104.128.0/17130.104.0.0/16

• Traffic engineering + reachability

130.104.1.1

9130.104.128.0/17130.104.0.0/16

Monday 28 June 2010

Page 19: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Why so may (small) prefixes? (3)

My provider #1

My provider #2

ME

130.104.0.0/16

130.104.0.0/17130.104.0.0/16

130.104.0.0/17130.104.0.0/16

130.104.128.0/17130.104.0.0/16

130.104.0.0/17130.104.0.0/16

130.104.128.0/17130.104.0.0/16

• Traffic engineering + reachability

130.104.1.1

9130.104.128.0/17130.104.0.0/16

Monday 28 June 2010

Page 20: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Why so may (small) prefixes? (3)

My provider #1

My provider #2

ME

130.104.0.0/16

130.104.0.0/17130.104.0.0/16

130.104.0.0/17130.104.0.0/16

130.104.128.0/17130.104.0.0/16

130.104.128.0/17130.104.0.0/16

• Traffic engineering + reachability

130.104.1.1

9130.104.128.0/17130.104.0.0/16

Monday 28 June 2010

Page 21: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Why so may (small) prefixes? (3)

My provider #1

My provider #2

ME

130.104.0.0/16

130.104.128.0/17130.104.0.0/16

130.104.128.0/17130.104.0.0/16

• Traffic engineering + reachability

130.104.1.1

9130.104.128.0/17130.104.0.0/16

Monday 28 June 2010

Page 22: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Why so may (small) prefixes? (3)

My provider #1

My provider #2

ME

130.104.0.0/16

130.104.128.0/17130.104.0.0/16

130.104.128.0/17130.104.0.0/16

• Traffic engineering + reachability

130.104.1.1

9130.104.128.0/17130.104.0.0/16

Monday 28 June 2010

Page 23: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Why so may (small) prefixes? (4)

• Allocation of IP prefixes to sites

• Initial solution chosen by IANA

• First come, first served for all qualifying sites

• Few constraints on which sites qualify for an IP prefix, owned forever

• Classful network design (/8, /16, /24)

• Hard to aggregate

130.100.0.0/16 ripencc! adv130.101.0.0/16 arin !! adv130.102.0.0/16 apnic!! adv130.103.0.0/16 arin! ! unadv130.104.0.0/16 ripencc! adv

10

Monday 28 June 2010

Page 24: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Why so may (small) prefixes? (5)

• Allocation of IP prefixes to sites

• Solution chosen by RIRs after CIDR

• Provider Independent (PI) Prefixes

• Given by RIRs to qualifying sites (basically ISPs paying their membership dues to the RIR)

• Owned by the site forever and can be globally announced

11

Monday 28 June 2010

Page 25: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Why so may (small) prefixes? (6)

• Allocation of IP prefixes to sites

• Solution chosen by RIRs after CIDR

• Provider Aggregatable (PA) Prefixes

• Given by ISPs from their own address block to customers

• Customers are expected to return their prefix to its owner if they change from ISP

• ... but provider lock-in, renumbering burden...

12

Monday 28 June 2010

Page 26: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Traffic Engineering

• Outgoing TE is “easy”

• Incoming TE is “hard”

• Injection of prefixes limited to /24s and prone to aggregation

• BGP tweaks (prepending&co) are tweaks

• Hard/costly to have a per client TE

13

Monday 28 June 2010

Page 27: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Routing table

• Prefixes are announced to all the Internet

• FIB size may become a problem

• Changes are potentially seen by everybody

• Churn may become a problem

14

Monday 28 June 2010

Page 28: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

IPv4 exhaustion

• Hum, yes, in top of this we are experiencing IPv4 addresses exhaustion!

15

Source: http://www.potaroo.net/tools/ipv4/

Monday 28 June 2010

Page 29: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Internet is not going so well

• Really many prefixes

• Churn

• Hard to do fine grained incoming traffic engineering

• IP addresses are becoming as rare as gold!

16

Monday 28 June 2010

Page 30: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Internet is not going so well

• Really many prefixes

• Churn

• Hard to do fine grained incoming traffic engineering

• IP addresses are becoming as rare as gold!

16

• How can we improve it?

Monday 28 June 2010

Page 31: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Separating Identifiers from Locators

17

Monday 28 June 2010

Page 32: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

The complementary roles of IP addresses

• The IP addresses currently used by endhosts play two complementary roles

• Identifier role: the IP address identifies (with port) the endpoint of transport flows

• Locator role: the IP address indicates the paths used to reach the endhost

• these paths are updated by routing protocols after each topology change

18

Monday 28 June 2010

Page 33: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

The Locator/Identifier Separation

• Today, changing the locator means changing the identifier, breaking the pending flows

• Separating the locator and the identifier roles to avoid breaking the flows

• Host-based approach

• Network-based approach

19

Monday 28 June 2010

Page 34: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Host-based Loc/ID split• Roles

• Translates the packets so that

• Transport layer only sees the host identifier

• IP Routing sublayer sees only locators

• Manages the set of locators

• Switches from one locator to another upon move or after link failure

• Hosts maintain some state

Transport layer

IP Routing sublayer

20[HIP, ILNP, shim6, Six/One]

Monday 28 June 2010

Page 35: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Host-based Loc/ID split• Roles

• Translates the packets so that

• Transport layer only sees the host identifier

• IP Routing sublayer sees only locators

• Manages the set of locators

• Switches from one locator to another upon move or after link failure

• Hosts maintain some state

Transport layer

IP Routing sublayer

Identifier: Ia

20[HIP, ILNP, shim6, Six/One]

Monday 28 June 2010

Page 36: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Host-based Loc/ID split• Roles

• Translates the packets so that

• Transport layer only sees the host identifier

• IP Routing sublayer sees only locators

• Manages the set of locators

• Switches from one locator to another upon move or after link failure

• Hosts maintain some state

Transport layer

IP Routing sublayerLocators: {Ra, Rb}

Identifier: Ia

20[HIP, ILNP, shim6, Six/One]

Monday 28 June 2010

Page 37: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Host-based Loc/ID split• Roles

• Translates the packets so that

• Transport layer only sees the host identifier

• IP Routing sublayer sees only locators

• Manages the set of locators

• Switches from one locator to another upon move or after link failure

• Hosts maintain some state

Transport layer

IP Routing sublayerLocators: {Ra, Rb}

Specific sublayerIdentifier: Ia

20[HIP, ILNP, shim6, Six/One]

Monday 28 June 2010

Page 38: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Network-based Loc/ID split

B/b

A/a

a.1.2.3

b.4.5.6

C/cA/a

B/b

21

Monday 28 June 2010

Page 39: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Network-based Loc/ID split• Host’s IP stack unchanged

• Each host has one stable IP address

• Used as identifier

• Not globally routable

B/b

A/a

a.1.2.3

b.4.5.6

C/c

Transport layer

IP Routing layer

c.7.8.9

A/a

B/b

21

Monday 28 June 2010

Page 40: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Network-based Loc/ID split• Host’s IP stack unchanged

• Each host has one stable IP address

• Used as identifier

• Not globally routable

• Each edge router owns

• Globally routed addresses used as locators

• Mapping mechanism is used to find locators associated to one identifier

• Packets from hosts are modified before being sent on Internet

B/b

A/a

a.1.2.3

b.4.5.6

C/c

Transport layer

IP Routing layer

c.7.8.9

A/a

B/b

Locators for C/c: a.1.2.3, b.4.5.6 21

Monday 28 June 2010

Page 41: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Host vs Network-based Loc/ID split

• We need both!

• At work, connected directly to the wall

• Let my company doing the stuff for the whole network

• In the street, calling with Skype over WIFI&3G

• Prefer WIFI to 3G

22

Monday 28 June 2010

Page 42: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

23

Monday 28 June 2010

Page 43: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

23

Peter Paul Rubens

Monday 28 June 2010

Page 44: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP, a network-based Loc/ID split solution

24

[LISP]

Monday 28 June 2010

Page 45: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP in a nutshell

25

Monday 28 June 2010

Page 46: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

The Locator Identifier Separation Protocol (1/2)• Define a router-based solution where current IP addresses are

separated in two different spaces:

• Endpoint Identifiers (EID)

• Identify end-hosts

• Non-globally routable

• Hosts in a given site are expected to use EIDs in the same prefix

• Routing Locators (RLOC)

• Attached to routers (router interfaces)

• Globally routable

26

Monday 28 June 2010

Page 47: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

The Locator Identifier Separation Protocol (2/2)• Follows the Map-and-Encap principle

• A mapping system maps EID prefixes onto site routers RLOCs

• Routers encapsulate the packets received from hosts before sending them towards the destination RLOC

• Routers decapsulate the packets received from the Internet before sending them towards the destination hosts

27

Monday 28 June 2010

Page 48: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP in a nutshell

2001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Site 2

Site 1

28

Monday 28 June 2010

Page 49: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP in a nutshell

2001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Site 2

Site 1

28

Monday 28 June 2010

Page 50: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP in a nutshell

2001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Site 2

Site 1

28

Monday 28 June 2010

Page 51: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP in a nutshell

2001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Mapping System

Site 2

Site 1

28

Map-Request:2001:DB8:cafe::1?

Monday 28 June 2010

Page 52: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP in a nutshell

2001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Mapping System

Site 2

Site 1

28

Map-Reply:2001:DB8:cafe::/56

3.2.2.1 1 100%2.2.2.1 2 100%

Monday 28 June 2010

Page 53: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP in a nutshell

2001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Mapping System

Site 2

Site 1

28

Monday 28 June 2010

Page 54: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP in a nutshell

2001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Mapping System

Site 2

Site 1

28

Monday 28 June 2010

Page 55: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP in a nutshell

2001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Mapping System

Site 2

Site 1

28

Monday 28 June 2010

Page 56: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP in a nutshell

2001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Mapping System

Site 2

Site 1

28

Monday 28 June 2010

Page 57: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Terminology

2001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Mapping System

Site 2

Site 1

29

Monday 28 June 2010

Page 58: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Terminology

2001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Mapping System

Site 2

Site 1

29

Endpoint Identifiers (EID)Endpoint Identifiers (EID)

Monday 28 June 2010

Page 59: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Terminology

2001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Mapping System

Site 2

Site 1

29

Monday 28 June 2010

Page 60: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Terminology

2001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Mapping System

Site 2

Site 1

29

Routing Locators (RLOC)Routing Locators (RLOC)Routing Locators (RLOC)Routing Locators (RLOC)

Monday 28 June 2010

Page 61: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Terminology

2001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Mapping System

Site 2

Site 1

29

Monday 28 June 2010

Page 62: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Terminology

2001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Mapping System

Site 2

Site 1

29

Ingress Tunnel Routers (ITR)Ingress Tunnel Routers (ITR)

Monday 28 June 2010

Page 63: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Terminology

2001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Mapping System

Site 2

Site 1

29

Monday 28 June 2010

Page 64: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Terminology

2001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Mapping System

Site 2

Site 1

29

Egress Tunnel Routers (ETR)Egress Tunnel Routers (ETR)

Monday 28 June 2010

Page 65: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Terminology

2001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Mapping System

Site 2

Site 1

29

Monday 28 June 2010

Page 66: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Terminology

2001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Mapping System

Site 2

Site 1

29

EID-to-RLOC database

Monday 28 June 2010

Page 67: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Terminology

2001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Mapping System

Site 2

Site 1

29

Monday 28 June 2010

Page 68: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Terminology

• Ingress Tunnel Router (ITR): a router which accepts a packet containing a single IP header. The router maps the destination address of the packet to an RLOC and prepends a LISP header before forwarding the encapsulatedpacket.

• Egress Tunnel Router (ETR): a router which accepts a LISP encapsulated packet. The router strips the LISP header and forwards the packet based on the next header

30

Monday 28 June 2010

Page 69: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Terminology

• EID-to-RLOC Database: a globally distributed database that contains all known EID-prefix to RLOC mappings

• LISP Cache: EID-to-RLOC Database stored at the ITR

• LISP Database: EID-to-RLOC Database stored at the ETR

31

Monday 28 June 2010

Page 70: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

How LISP has been obtained?

32

Monday 28 June 2010

Page 71: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP Main Design Goals• No end-systems (hosts) changes (1)

• Minimize required changes to the Internet infrastructure (2) and the number of routers which have to be modified (5)

• Avoid or minimize packet loss when EID-to-RLOC mappings need to be performed (7)

• Be incrementally deployable (3)

• No router hardware changes (4) and minimize router software changes (6)

33

Monday 28 June 2010

Page 72: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

No end-systems (hosts) changes

34

Monday 28 June 2010

Page 73: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Network-based solution

35

• Identifiers are pure IP addresses (v4 or v6)

• Work performed by routers

• Encapsulation based protocol (vs rewriting)

• Packets received at the destination are the same as those sent by the source (no address/port/... modification)

➡Transparent for end-hosts

Monday 28 June 2010

Page 74: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Minimize the number of routers which have to be

modified and required changes to the Internet infrastructure

36

Monday 28 June 2010

Page 75: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Split the Internet in two spaces

37

2001:DB8:beef::1 2001:DB8:cafe::1

EID Space RLOC Space EID Space

Transitionbetween the spaces

Monday 28 June 2010

Page 76: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

RLOC space

38

• Composed of the current transit networks

• Keep IP and BGP as-is

• RLOCs globally routable

• EIDs are invisible here

➡No change in the core

Monday 28 June 2010

Page 77: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

EID space

• Composed of the current stub networks

• EIDs are routable (IP) within their stub

• RLOCs and EIDs of other stubs are unknown in the stub

• IGP with default route(s) to the border routers

• Packets to distant EIDs simply follow the default route(s)

➡No change in the stubs

39

Monday 28 June 2010

Page 78: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Transition between the two spaces

• LISP: the glue between the EID and RLOC spaces

• Modify border routers to support LISP functionality (xTR)

• No change before/after the border

• Border routers do not advertise stub prefixes (EID) anymore to the Internet

40

Monday 28 June 2010

Page 79: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Internet is more than routers

• NATs

• Firewalls

• Strange stuff

• How to be confident the packets will not be lost somewhere?

41

Monday 28 June 2010

Page 80: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Internet is more than routers

• NATs

• Firewalls

• Strange stuff

• How to be confident the packets will not be lost somewhere?

41

=> Transport the new protocol over UDP

Monday 28 June 2010

Page 81: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

• Data-plane: UDP/4341 (IP(UDP(LISP(IP))))

UDP based encapsulation

42

Src/Dst RLOCs

Identifier Part

Payload

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Version| IHL |Type of Service| Total Length | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Identification |Flags| Fragment Offset | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ OH | Time to Live | Protocol = 17 | Header Checksum | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Source Routing Locator | \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | Destination Routing Locator | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / | Source Port = xxxx | Dest Port = 4341 | UDP +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | UDP Length | UDP Checksum | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ L |N|L|E| rflags | Nonce | I \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ S / | Locator Status Bits | P +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Version| IHL |Type of Service| Total Length | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Identification |Flags| Fragment Offset | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ IH | Time to Live | Protocol | Header Checksum | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Source EID | \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | Destination EID | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

UDP headerControl Flags

Endp

oint

pac

ket

Trav

ersa

l and

LIS

P

Monday 28 June 2010

Page 82: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

• Control-plane: UDP/4342 (IP(UDP(LISP)))

UDP based control messages

43

Src/Dst RLOCs

Control message

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Version| IHL |Type of Service| Total Length | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Identification |Flags| Fragment Offset | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ OH | Time to Live | Protocol = 17 | Header Checksum | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Source Routing Locator | \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | Destination Routing Locator | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / | Source Port = xxxx | Dest Port = 4342 | UDP +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | UDP Length | UDP Checksum | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ : : : LISP Control Message : +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

UDP header

Trav

ersa

lLI

SP

Monday 28 June 2010

Page 83: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Avoid or minimize packet loss when EID-to-RLOC mappings

need to be performed

44

Monday 28 June 2010

Page 84: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Avoid or minimize packet loss when EID-to-RLOC mappings

need to be performed

44

Or Dimitri’s formulation: Effect of changes for “in-use”

EID-to-RLOC mappings

Monday 28 June 2010

Page 85: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

What is a mapping?

45

• A mapping maps EID prefixes onto site routers RLOCs

• A list of RLOCs is associated to each EID prefix

• A priority, weight and reachability information is associated to each RLOC

2001:DB8:cafe::/56:•RLOC: 192.0.2.10, priority:1, weight=75, reachability:1•RLOC: 2001:db8:dead::1, priority:1, weight=25, reachability:0•RLOC: 192.0.2.30, priority:2, weight=100, reachability:1

Monday 28 June 2010

Page 86: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

How are the mappings obtained?

• EID-to-RLOC Database: a globally distributed database that contains all the mappings

• The system formed of the EID-to-RLOC Database and the protocol to query it is called the mapping system

• If the ITR does not have a mapping for a destination EID, it queries the mapping system

• The replied mapping is installed in the Map-Cache on the ITR for later use

46

Monday 28 June 2010

Page 87: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Proposed Mapping System

• LISP-CONS

• LISP+ALT

• NERD

• LISP-DHT

• LISP-Tree

47

Monday 28 June 2010

Page 88: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP+ALT

48

Monday 28 June 2010

Page 89: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP+ALT

• A mapping mechanism that relies on an alternate topology to distribute mapping requests to mapping servers

• LISP ITR routers sending mapping request messages to ALT routers

• ALT routers forward those mapping messages between themselves on an overlay topology built by using GRE tunnels

49

Monday 28 June 2010

Page 90: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP+ALT

• BGP announces where the mappings can be found

• Map-Requests are forwarded on the ALT

• Map-Replies are forwarded on the legacy Internet (directly sent to the ITRs’ RLOC)

• ! BGP does not give the mappings !

50

Monday 28 June 2010

Page 91: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP+ALT

51[tree]

Monday 28 June 2010

Page 92: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP+ALT issues

• Complex system with tunnels, BGP protocol (no discussion about policies), ...

• Still relies on lots of error-prone manual configuration

• Scalability will depend on whether aggregation will be possible

• If mapping requests are lost due to congestion, difficult to diagnose the problem or send them via another path

• Security needs to be studied

52

Monday 28 June 2010

Page 93: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

The role of priority and weight

• If an EID has several RLOCs:

• Select the RLOC with the lowest priority value

• If several RLOCs have the same lowest priority

• Balance the load between them proportionally to the weight

• Example:

➡ 75% of the traffic to 192.0.2.10, 25% to 2001:db8:dead::1 and 0% to 192.0.2.30

53

2001:DB8:cafe::/56:•RLOC: 192.0.2.10, priority:1, weight= 75•RLOC: 2001:db8:dead::1, priority:1, weight= 25•RLOC: 192.0.2.30, priority:2, weight=100

Monday 28 June 2010

Page 94: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Priority and weight to control incoming traffic

• LISP site can control incoming traffic with Weight and Priority

2001:DB8:cafe::1

192.0.2.2

192.0.2.12001:DB8:cafe::/56

A

B

54

Monday 28 June 2010

Page 95: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

• A Primary, B Backup2001:DB8:cafe::/56•192.0.2.1, prio: 1, weight: 100•192.0.2.2, prio: 99, weight: 100

Priority and weight to control incoming traffic

• LISP site can control incoming traffic with Weight and Priority

2001:DB8:cafe::1

192.0.2.2

192.0.2.12001:DB8:cafe::/56

A

B

54

Monday 28 June 2010

Page 96: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

• A Primary, B Backup2001:DB8:cafe::/56•192.0.2.1, prio: 1, weight: 100•192.0.2.2, prio: 99, weight: 100

Priority and weight to control incoming traffic

• LISP site can control incoming traffic with Weight and Priority

2001:DB8:cafe::1

192.0.2.2

192.0.2.12001:DB8:cafe::/56

A

B

• A 60%, B 40%

LISP ITR will load balance layer 4 flows by using hash as in ECMP

2001:DB8:cafe::/56•192.0.2.1, prio: 1, weight: 60•192.0.2.2, prio: 1, weight: 40

54

Monday 28 June 2010

Page 97: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

The role of the reachability

• Indicates if the RLOC is reachable from the ETR perspective

• The reachability seen at the ETR may be different than the reachability seen at the ITR => hint

• Typically used for temporary failures that should not affect the mapping at long term

55

Monday 28 June 2010

Page 98: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

The reachability problem

• Today, preserving the prefixes reachability is mainly performed locally

• In LISP, the legacy Internet is EID agnostic

56

Monday 28 June 2010

Page 99: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

A/a

The reachability problem in today’s Internet

A/a

A/aA/a

A/aA/a

• In today’s Internet, routing protocols converge after a link failure to ensure that multihomed prefixes such as A/a remain reachable

57

Monday 28 June 2010

Page 100: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

A/a

The reachability problem in today’s Internet

A/aA/a

A/a

• In today’s Internet, routing protocols converge after a link failure to ensure that multihomed prefixes such as A/a remain reachable

57

Monday 28 June 2010

Page 101: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

The reachability problem in a LISP-based Internet

B/b

A/aA/aB/b

a.1.2.3

b.1.2.3

C/c

C/c>a.1.2.3, p=1 b.1.2.3, p=2

• Upon failure of ETR1, A continues to advertise A/a via BGP

• How can ITR notice that ETR1 failed and that ETR2 should be used instead?

ETR1

ETR2

A

BITR

58

Monday 28 June 2010

Page 102: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

The reachability problem in a LISP-based Internet

B/b

A/aA/aB/b

b.1.2.3

C/c

C/c>a.1.2.3, p=1 b.1.2.3, p=2

• Upon failure of ETR1, A continues to advertise A/a via BGP

• How can ITR notice that ETR1 failed and that ETR2 should be used instead?

ETR1

ETR2

A

BITR

58

Monday 28 June 2010

Page 103: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Solving the reachability problem with the locator status bits

• Add an optional 32 bits vector in the data packets

• Each source locator is mapped to one position in the vector

if locator_status_bit(i) = 1

RLOC i is reachable

else

RLOC i is not reachable

59

Monday 28 June 2010

Page 104: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Solving the reachability problem with the locator status bits

• ETR2 notices the failure and informs all ITRs to which it is sending LISP encapsulated packets by setting the reachability bit of ETR1 to 0

a.1.2.3

b.1.2.3

C/cETR1

ETR2

ITR

C/c>a.1.2.3, p=1 b.1.2.3, p=2

60

Monday 28 June 2010

Page 105: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Solving the reachability problem with the locator status bits

• ETR2 notices the failure and informs all ITRs to which it is sending LISP encapsulated packets by setting the reachability bit of ETR1 to 0

a.1.2.3

b.1.2.3

C/cETR1

ETR2

ITR

C/c>a.1.2.3, p=1 b.1.2.3, p=2

Status bits = 11000...0

PAYLOAD

60

Monday 28 June 2010

Page 106: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Solving the reachability problem with the locator status bits

• ETR2 notices the failure and informs all ITRs to which it is sending LISP encapsulated packets by setting the reachability bit of ETR1 to 0

a.1.2.3

b.1.2.3

C/cETR1

ETR2

ITR

C/c>a.1.2.3, p=1 b.1.2.3, p=2

Status bits = 11000...0

PAYLOAD

60

Monday 28 June 2010

Page 107: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Solving the reachability problem with the locator status bits

• ETR2 notices the failure and informs all ITRs to which it is sending LISP encapsulated packets by setting the reachability bit of ETR1 to 0

a.1.2.3

b.1.2.3

C/cETR1

ETR2

ITR

C/c>a.1.2.3, p=1 b.1.2.3, p=2

60

Monday 28 June 2010

Page 108: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Solving the reachability problem with the locator status bits

• ETR2 notices the failure and informs all ITRs to which it is sending LISP encapsulated packets by setting the reachability bit of ETR1 to 0

a.1.2.3

b.1.2.3

C/cETR1

ETR2

ITR

C/c>a.1.2.3, p=1 b.1.2.3, p=2

Status bits = 11000...0

PAYLOAD

60

Monday 28 June 2010

Page 109: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Solving the reachability problem with the locator status bits

• ETR2 notices the failure and informs all ITRs to which it is sending LISP encapsulated packets by setting the reachability bit of ETR1 to 0

a.1.2.3

b.1.2.3

C/cETR1

ETR2

ITR

C/c>a.1.2.3, p=1 b.1.2.3, p=2

Status bits = 11000...0

PAYLOAD

60

Monday 28 June 2010

Page 110: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Solving the reachability problem with the locator status bits

• ETR2 notices the failure and informs all ITRs to which it is sending LISP encapsulated packets by setting the reachability bit of ETR1 to 0

a.1.2.3

b.1.2.3

C/cETR1

ETR2

ITR

C/c>a.1.2.3, p=1 b.1.2.3, p=2

60

Monday 28 June 2010

Page 111: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Solving the reachability problem with the locator status bits

• ETR2 notices the failure and informs all ITRs to which it is sending LISP encapsulated packets by setting the reachability bit of ETR1 to 0

b.1.2.3

C/cETR1

ETR2

ITR

C/c>a.1.2.3, p=1 b.1.2.3, p=2

60

Monday 28 June 2010

Page 112: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Solving the reachability problem with the locator status bits

• ETR2 notices the failure and informs all ITRs to which it is sending LISP encapsulated packets by setting the reachability bit of ETR1 to 0

b.1.2.3

C/cETR1

ETR2

ITR

C/c>a.1.2.3, p=1 b.1.2.3, p=2

Status bits = 01000...0

PAYLOAD

60

Monday 28 June 2010

Page 113: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Solving the reachability problem with the locator status bits

• ETR2 notices the failure and informs all ITRs to which it is sending LISP encapsulated packets by setting the reachability bit of ETR1 to 0

b.1.2.3

C/cETR1

ETR2

ITR

C/c>a.1.2.3, p=1 b.1.2.3, p=2

Status bits = 01000...0

PAYLOAD

60

Monday 28 June 2010

Page 114: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Solving the reachability problem with the locator status bits

• ETR2 notices the failure and informs all ITRs to which it is sending LISP encapsulated packets by setting the reachability bit of ETR1 to 0

b.1.2.3

C/cETR1

ETR2

ITR

C/c>a.1.2.3, p=1 b.1.2.3, p=2

C/c a.1.2.3, p=1>b.1.2.3, p=2

Status bits = 01000...0

PAYLOAD

60

Monday 28 June 2010

Page 115: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Solving the reachability problem with the locator status bits

• ETR2 notices the failure and informs all ITRs to which it is sending LISP encapsulated packets by setting the reachability bit of ETR1 to 0

b.1.2.3

C/cETR1

ETR2

ITR

C/c>a.1.2.3, p=1 b.1.2.3, p=2

C/c a.1.2.3, p=1>b.1.2.3, p=2

60

Monday 28 June 2010

Page 116: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

What if the failure is not notified locally to xTRs?

• ITR needs to periodically probe the ETRs they send traffic to

• Unidirectional or triangular routing: periodically send reachability probes

• Bidirectional traffic: echo-nonce algorithm

61

Monday 28 June 2010

Page 117: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Echo-Nonce Algorithm

• Uniquely identify a packet by setting a nonce while encapsulating (at the ITR)

• Nonce is optional

• Set the E-bit to 1 to ask the ETR to start the Echo-Nonce algorithm

62

Monday 28 June 2010

Page 118: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Echo-Nonce Algorithm• xTR I wants to know if the RLOC it uses to reach

ETR E is reachable:

• Generate a nonce n when encap to E

• Set echo-nonce bit to1

• Next time E sends a packet to I, the packet has the nonce set to n

• If I receives the nonce within a given time, it considers the RLOC reachable, otherwise E is considered unreachable

63

Monday 28 June 2010

Page 119: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Be incrementally deployable

64

Monday 28 June 2010

Page 120: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

3 challenges

65

• non-LISP to non-LISP

• non-LISP to LISP

• LISP to non-LISP

Monday 28 June 2010

Page 121: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

non-LISP to non-LISP

• LISP is not involved

• Current Internet

66

Monday 28 June 2010

Page 122: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

non-LISP to LISP

67

• Add a Proxy ITR (PITR) middle-box somewhere on the Internet

• PITR originates EID advertisement

• The EID prefix becomes globally routable (!)

• The PITR attracts traffic for the EID prefix

• Traffic with destination IP in the EID prefix are natively forwarded to the PITR

• The PITR acts as the ITR on behalf of non-LISP sites

Monday 28 June 2010

Page 123: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

non-LISP to LISP

682001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Site 2

Site 1

PITR

2001:DB8::/32

Monday 28 June 2010

Page 124: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

non-LISP to LISP

682001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Site 2

Site 1

PITR

2001:DB8::/32

Monday 28 June 2010

Page 125: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

non-LISP to LISP

682001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Site 2

Site 1

PITR

2001:DB8::/32

Monday 28 June 2010

Page 126: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

non-LISP to LISP

682001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Mapping SystemSite 2

Site 1

Map-Request:2001:DB8:cafe::1?

PITR

2001:DB8::/32

Monday 28 June 2010

Page 127: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

non-LISP to LISP

682001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Mapping SystemSite 2

Site 1

Map-Reply:2001:DB8:cafe::/56

3.2.2.1 1 100%2.2.2.1 2 100%

PITR

2001:DB8::/32

Monday 28 June 2010

Page 128: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

non-LISP to LISP

682001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Mapping SystemSite 2

Site 1

PITR

2001:DB8::/32

Monday 28 June 2010

Page 129: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

non-LISP to LISP

682001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Mapping SystemSite 2

Site 1

PITR

2001:DB8::/32

Monday 28 June 2010

Page 130: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

non-LISP to LISP

682001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Mapping SystemSite 2

Site 1

PITR

2001:DB8::/32

Monday 28 June 2010

Page 131: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

non-LISP to LISP

682001:DB8:beef::1

2001:DB8:cafe::1

ISP11/8

ISP33/8

ISP22/8

2.2.2.1

3.2.2.1

1.1.1.1

2.1.1.1

Mapping SystemSite 2

Site 1

PITR

2001:DB8::/32

Monday 28 June 2010

Page 132: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP to non-LISP

69

• EID and RLOC space are separated

• The ITR does not encapsulate if the destination IP is not an EID

• If no PITR for the source, use LISP-NAT

• LISP-NAT rewrites the non-routable EID source to a routable source and keeps the state for the reverse direction

Monday 28 June 2010

Page 133: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP to non-LISP

70192.0.2.1

130.104.1.1

ISP11/8

ISP33/8

ISP22/8

1.1.1.1

2.1.1.1

Site 2130.104/16

Site 1

Monday 28 June 2010

Page 134: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP to non-LISP

70192.0.2.1

130.104.1.1

ISP11/8

ISP33/8

ISP22/8

1.1.1.1

2.1.1.1

Site 2130.104/16

Site 1

Monday 28 June 2010

Page 135: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP to non-LISP

70192.0.2.1

130.104.1.1

ISP11/8

ISP33/8

ISP22/8

1.1.1.1

2.1.1.1

Site 2130.104/16

Site 1

Monday 28 June 2010

Page 136: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Map-Request:130.104.1.1?

LISP to non-LISP

70192.0.2.1

130.104.1.1

ISP11/8

ISP33/8

ISP22/8

1.1.1.1

2.1.1.1

Mapping System

Site 2130.104/16

Site 1

Monday 28 June 2010

Page 137: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP to non-LISP

70

Map-Reply:130.104.0.0/16

not an EID

192.0.2.1

130.104.1.1

ISP11/8

ISP33/8

ISP22/8

1.1.1.1

2.1.1.1

Mapping System

Site 2130.104/16

Site 1

Monday 28 June 2010

Page 138: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP to non-LISP

70192.0.2.1

130.104.1.1

ISP11/8

ISP33/8

ISP22/8

1.1.1.1

2.1.1.1

Mapping System

Site 2130.104/16

Site 1

<src:1.1.1.1,dst: 130.104.1.1>

Monday 28 June 2010

Page 139: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP to non-LISP

70192.0.2.1

130.104.1.1

ISP11/8

ISP33/8

ISP22/8

1.1.1.1

2.1.1.1

Mapping System

Site 2130.104/16

Site 1

<src:1.1.1.1,dst: 130.104.1.1>

Monday 28 June 2010

Page 140: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP to non-LISP

70192.0.2.1

130.104.1.1

ISP11/8

ISP33/8

ISP22/8

1.1.1.1

2.1.1.1

Mapping System

Site 2130.104/16

Site 1

Monday 28 June 2010

Page 141: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP to non-LISP

70192.0.2.1

130.104.1.1

ISP11/8

ISP33/8

ISP22/8

1.1.1.1

2.1.1.1

Mapping System

Site 2130.104/16

Site 1

<src: 130.104.1.1,dst:1.1.1.1>

Monday 28 June 2010

Page 142: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP to non-LISP

70192.0.2.1

130.104.1.1

ISP11/8

ISP33/8

ISP22/8

1.1.1.1

2.1.1.1

Mapping System

Site 2130.104/16

Site 1

<src: 130.104.1.1,dst:1.1.1.1>

Monday 28 June 2010

Page 143: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP to non-LISP

70192.0.2.1

130.104.1.1

ISP11/8

ISP33/8

ISP22/8

1.1.1.1

2.1.1.1

Mapping System

Site 2130.104/16

Site 1

Monday 28 June 2010

Page 144: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP to non-LISP

70192.0.2.1

130.104.1.1

ISP11/8

ISP33/8

ISP22/8

1.1.1.1

2.1.1.1

Mapping System

Site 2130.104/16

Site 1

Monday 28 June 2010

Page 145: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

No router hardware changes and minimize

router software changes

71

Monday 28 June 2010

Page 146: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Use IP and UDP

72

• RLOCs and EIDs are pure IP packets

• Any router implements IP

• EID prefixes follow CIDR

• Any router implements longest prefix matching

• Transport LISP over UDP

• Any router implements UDP

Monday 28 June 2010

Page 147: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Conclusion

73

Monday 28 June 2010

Page 148: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Are the goals reached?

74

Monday 28 June 2010

Page 149: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Are the goals reached?

74

1. Reduction of routing table size in the "default-free zone" (DFZ)?

Monday 28 June 2010

Page 150: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Are the goals reached?

74

1. Reduction of routing table size in the "default-free zone" (DFZ)?

2. More cost-effective multihoming?

Monday 28 June 2010

Page 151: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Are the goals reached?

74

1. Reduction of routing table size in the "default-free zone" (DFZ)?

2. More cost-effective multihoming?

3. Easing of renumbering burden when clients change providers?

Monday 28 June 2010

Page 152: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Are the goals reached?

74

1. Reduction of routing table size in the "default-free zone" (DFZ)?

2. More cost-effective multihoming?

3. Easing of renumbering burden when clients change providers?

4. Traffic engineering capabilities?

Monday 28 June 2010

Page 153: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Are the goals reached?

74

1. Reduction of routing table size in the "default-free zone" (DFZ)?

2. More cost-effective multihoming?

3. Easing of renumbering burden when clients change providers?

4. Traffic engineering capabilities?

5. Mobility without address changing?

Monday 28 June 2010

Page 154: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Research perspectives

• Mapping Systems

• Security

• Reachability/Resiliency

• IPv4 to IPv6 transition with LISP

• Mobility

• LISP for enterprise/CDN/DC

• ...

75

Monday 28 June 2010

Page 155: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

References• Host-based Loc/ID split

[hip]R. Moskowitz and P. Nikander, Host Identity Protocol, RFC5201

[shim6] E. Nordmark and M. Bagnulo, Shim6: Level 3 Multihoming Shim Protocol for IPv6, RFC5533

[ilnp] R. Atkinson, ILNP Concept of Operations, draft-rja-ilnp-intro-05.txt

[six/one] C. Vogt, Six/One: A Solution for Routing and Addressing in IPv6, draft-vogt-rrg-six-one-02.txt

76

Monday 28 June 2010

Page 156: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

References

• LISP

[lisp]D. Farinacci et al., Locator/ID Separation Protocol (LISP), draft-ietf-lisp-07.txt

[mn]D. Farinacci et al., LISP Mobile Node, draft-meyer-lisp-mn-01.txt

[inter] D. Lewis et al., Interworking LISP with IPv4 and IPv6, draft-ietf-lisp-interworking-00.txt

77

Monday 28 June 2010

Page 157: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

References• LISP Mapping systems

[cons] S. Brim et al., LISP-CONS: A Content distribution Overlay Network Service for LISP, draft-meyer-lisp-cons-04.txt

[alt] V. Fuller et al., LISP Alternative Topology (LISP+ALT), draft-ietf-lisp-alt-04.txt

[nerd] E. Lear, NERD: A Not-so-novel EID to RLOC Database, draft-lear-lisp-nerd-08.txt

[dht] L. Mathy and L. Iannone, LISP-DHT: towards a DHT to map identifiers onto locators, Rearch2008

[tree] LISP-TREE: A DNS Hierarchy to Support the LISP Mapping System, L. Jakab et al., JSAC, 2010

78

Monday 28 June 2010

Page 158: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

References• Miscellaneous LISP

[l4] http://www.lisp4.net

[l6] http://www.lisp6.net

[lface] http://www.lisp4.facebook.com

[openlisp] L. Iannone et al., OpenLISP Implementation Report, draft-iannone-openlisp-implementation-01.txt

[lispclick] D.Saucez and V. Nguyen, LISP-Click: A Click implementation of the Locator/ID Separation Protocol, SyClick09

[cache] L. Iannone et al., On the cost of caching locator/ID mappings, CoNEXT07

[security] D. Saucez et al., Notes on LISP Security Threats and Requirements, draft-saucez-lisp-security-00.txt

[preserve] O. Bonaventure et al., Preserving the reachability of LISP ETRs in case of failures, draft-bonaventure-lisp-preserve-00.txt

[lispte] D. Saucez et al., Interdomain Traffic Engineering in a Locator/Identifier Separation Context, INM08

79

Monday 28 June 2010

Page 159: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

References• General

IETF Internet Engineering Task Force: http://www.ietf.org

LISP Working-group: http://tools.ietf.org/wg/lisp

IRTF Internet Research Task Force: http://www.irtf.org

[benefits] B. Quotin et al., Evaluating the benefits of the locator/identifier separation, Mobiarch07

[cidr] V. Fuller et al.. Classless Inter-Domain Routing (CIDR): an Address Assignment and Aggregation Strategy, RFC1519

80

Monday 28 June 2010

Page 160: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Thank you

81

?? || /**/

Monday 28 June 2010

Page 161: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Backup

82

Monday 28 June 2010

Page 162: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Inter-domain routing

83

Monday 28 June 2010

Page 163: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Inter-domain Routing

• Goal

• Allow to transmit data along the best path towards the destination through several transit domains while taking into account the routing policies of each domain without knowing the detailed topology of those domains

• The Border Gateway Protocol (BGP) is the common protocol between the domains

84

Monday 28 June 2010

Page 164: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Routing Policies

• In theory, BGP allows each domain to defines its own routing policy...

• In practice, there are two common policies:

• Customer-provider peering: customer c buy Internet connectivity to provider p.

• Shared-cost peering: domains x and y agree to exchange data by using a direct link through an interconnection point.

85

Monday 28 June 2010

Page 165: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Customer-provider peering

AS1 AS2

AS3 AS4 AS5

AS6 AS8AS7

$$$ $$$ $

$ $ $

$ Customer-provider86

Monday 28 June 2010

Page 166: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Customer-provider peering

AS1 AS2

AS3 AS4 AS5

AS6 AS8AS7

$$$ $$$ $

$ $ $

$$$$$$$$$ Customer-provider

86

Monday 28 June 2010

Page 167: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Customer-provider peering

AS1 AS2

AS3 AS4 AS5

AS6 AS8AS7

$$$ $$$ $

$ $ $

$$$$$$$$ AS6?$ Customer-provider

86

Monday 28 June 2010

Page 168: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Shared-cost peering

AS1 AS2

AS3 AS4 AS5

AS6 AS8AS7

$$$ $$$ $

$ $ $

=

=

$ Customer-provider = Shared-cost87

Monday 28 June 2010

Page 169: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Shared-cost peering

AS1 AS2

AS3 AS4 AS5

AS6 AS8AS7

$$$ $$$ $

$ $ $

=

=

$ Customer-provider = Shared-cost87

Monday 28 June 2010

Page 170: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Shared-cost peering

AS1 AS2

AS3 AS4 AS5

AS6 AS8AS7

$$$ $$$ $

$ $ $

=

=

$ Customer-provider = Shared-cost87

Monday 28 June 2010

Page 171: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

How are routes discovered?

AS1 AS2

AS3 AS4 AS5

AS6

Customer-provider Shared-cost BGP announcement88

Monday 28 June 2010

Page 172: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

How are routes discovered?

AS1 AS2

AS3 AS4 AS5

AS6

Customer-provider Shared-cost

AS6 via AS3

BGP announcement88

Monday 28 June 2010

Page 173: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

How are routes discovered?

AS1 AS2

AS3 AS4 AS5

AS6

Customer-provider Shared-cost

AS6 via AS1:AS3

AS6 via AS3

BGP announcement88

Monday 28 June 2010

Page 174: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

How are routes discovered?

AS1 AS2

AS3 AS4 AS5

AS6

Customer-provider Shared-cost

AS6 via AS1:AS3AS6 via AS2:AS1:AS3

AS6 via AS3

BGP announcement88

Monday 28 June 2010

Page 175: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

How are routes discovered?

AS1 AS2

AS3 AS4 AS5

AS6

Customer-provider Shared-cost

AS6 via AS1:AS3AS6 via AS2:AS1:AS3

AS6 via AS3

BGP announcement

AS3 or AS1?

88

Monday 28 June 2010

Page 176: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Simplified BGP decision process

1. Select routes with the highest local-pref

• Manual configuration

2. If there are several routes, chose routes with the shortest AS path

• Mostly determined by the topology

• Can be influenced by using pre-pending

3. If there are still routes tie-breaking rule

89

Monday 28 June 2010

Page 177: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Route control with BGP

AS1

AS3 AS4

AS6

Customer-provider Shared-cost BGP announcement90

Monday 28 June 2010

Page 178: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Route control with BGP

AS1

AS3 AS4

AS6

Customer-provider Shared-cost BGP announcement

Policy for AS3:Export:

To AS1 set as-path prepend AS3

90

Monday 28 June 2010

Page 179: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Route control with BGP

AS1

AS3 AS4

AS6

Customer-provider Shared-cost

AS6 via AS1:AS3:AS3AS6 via AS3:AS3

BGP announcement

Policy for AS3:Export:

To AS1 set as-path prepend AS3

AS6 via AS3

90

Monday 28 June 2010

Page 180: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Route control with BGP

AS1

AS3 AS4

AS6

Customer-provider Shared-cost

AS6 via AS1:AS3:AS3AS6 via AS3:AS3

BGP announcement

Policy for AS3:Export:

To AS1 set as-path prepend AS3

Policy for AS4:Import: From AS3 set localpref=2000 From AS1 set localpref=100

AS6 via AS3

90

Monday 28 June 2010

Page 181: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Multihoming

My provider #1

My provider #2

ME

130.104.0.0/16

130.104.0.0/16

130.104.0.0/16

130.104.0.0/16

130.104.0.0/16

91

Monday 28 June 2010

Page 182: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Multihoming

My provider #1

My provider #2

ME

130.104.0.0/16

130.104.0.0/16

130.104.0.0/16

130.104.0.0/16

130.104.0.0/16

91

Monday 28 June 2010

Page 183: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Multihoming

My provider #1

My provider #2

ME

130.104.0.0/16

130.104.0.0/16

130.104.0.0/16

130.104.0.0/16

130.104.0.0/16

91

Monday 28 June 2010

Page 184: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Multihoming

My provider #1

My provider #2

ME

130.104.0.0/16

130.104.0.0/16

130.104.0.0/16

91

Monday 28 June 2010

Page 185: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Multihoming

My provider #1

My provider #2

ME

130.104.0.0/16

130.104.0.0/16

130.104.0.0/16

91

Monday 28 June 2010

Page 186: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP Data-plane

92

Monday 28 June 2010

Page 187: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Data-plane packets

Locator part

Identifier Part

Payload

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Version| IHL |Type of Service| Total Length | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Identification |Flags| Fragment Offset | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ OH | Time to Live | Protocol = 17 | Header Checksum | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Source Routing Locator | \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | Destination Routing Locator | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / | Source Port = xxxx | Dest Port = 4341 | UDP +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | UDP Length | UDP Checksum | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ L |N|L|E| rflags | Nonce | I \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ S / | Locator Status Bits | P +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Version| IHL |Type of Service| Total Length | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Identification |Flags| Fragment Offset | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ IH | Time to Live | Protocol | Header Checksum | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Source EID | \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | Destination EID | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

PresentationControl Flags

93

Monday 28 June 2010

Page 188: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Header details

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Version| IHL |Type of Service| Total Length | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Identification |Flags| Fragment Offset | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ OH | Time to Live | Protocol = 17 | Header Checksum | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Source Routing Locator | \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | Destination Routing Locator | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / | Source Port = xxxx | Dest Port = 4341 | UDP +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | UDP Length | UDP Checksum | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ L |N|L|E| rflags | Nonce | I \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ S / | Locator Status Bits | P +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Version| IHL |Type of Service| Total Length | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Identification |Flags| Fragment Offset | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ IH | Time to Live | Protocol | Header Checksum | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Source EID | \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | Destination EID | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

(IP(UDP(LISP(IP))))

94

Monday 28 June 2010

Page 189: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Header details

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Version| IHL |Type of Service| Total Length | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Identification |Flags| Fragment Offset | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ OH | Time to Live | Protocol = 17 | Header Checksum | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Source Routing Locator | \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | Destination Routing Locator | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / | Source Port = xxxx | Dest Port = 4341 | UDP +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | UDP Length | UDP Checksum | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ L |N|L|E| rflags | Nonce | I \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ S / | Locator Status Bits | P +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Version| IHL |Type of Service| Total Length | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Identification |Flags| Fragment Offset | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ IH | Time to Live | Protocol | Header Checksum | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Source EID | \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | Destination EID | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Source/Destination Locators

Source/Destination Locators

(IP(UDP(LISP(IP))))

94

Monday 28 June 2010

Page 190: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Header details

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Version| IHL |Type of Service| Total Length | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Identification |Flags| Fragment Offset | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ OH | Time to Live | Protocol = 17 | Header Checksum | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Source Routing Locator | \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | Destination Routing Locator | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / | Source Port = xxxx | Dest Port = 4341 | UDP +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | UDP Length | UDP Checksum | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ L |N|L|E| rflags | Nonce | I \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ S / | Locator Status Bits | P +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Version| IHL |Type of Service| Total Length | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Identification |Flags| Fragment Offset | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ IH | Time to Live | Protocol | Header Checksum | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Source EID | \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | Destination EID | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Random Source Port

Source/Destination Locators

Source/Destination Locators

(IP(UDP(LISP(IP))))

94

Monday 28 June 2010

Page 191: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Header details

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Version| IHL |Type of Service| Total Length | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Identification |Flags| Fragment Offset | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ OH | Time to Live | Protocol = 17 | Header Checksum | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Source Routing Locator | \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | Destination Routing Locator | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / | Source Port = xxxx | Dest Port = 4341 | UDP +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | UDP Length | UDP Checksum | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ L |N|L|E| rflags | Nonce | I \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ S / | Locator Status Bits | P +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Version| IHL |Type of Service| Total Length | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Identification |Flags| Fragment Offset | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ IH | Time to Live | Protocol | Header Checksum | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Source EID | \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | Destination EID | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Fixed Destination port

Random Source Port

Source/Destination Locators

Source/Destination Locators

(IP(UDP(LISP(IP))))

94

Monday 28 June 2010

Page 192: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Header details

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Version| IHL |Type of Service| Total Length | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Identification |Flags| Fragment Offset | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ OH | Time to Live | Protocol = 17 | Header Checksum | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Source Routing Locator | \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | Destination Routing Locator | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / | Source Port = xxxx | Dest Port = 4341 | UDP +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | UDP Length | UDP Checksum | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ L |N|L|E| rflags | Nonce | I \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ S / | Locator Status Bits | P +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Version| IHL |Type of Service| Total Length | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Identification |Flags| Fragment Offset | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ IH | Time to Live | Protocol | Header Checksum | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Source EID | \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | Destination EID | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Fixed Destination port

Random Source Port

Source/Destination Locators

Source/Destination Locators

Encap data integrity check

(IP(UDP(LISP(IP))))

94

Monday 28 June 2010

Page 193: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Header details

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Version| IHL |Type of Service| Total Length | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Identification |Flags| Fragment Offset | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ OH | Time to Live | Protocol = 17 | Header Checksum | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Source Routing Locator | \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | Destination Routing Locator | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / | Source Port = xxxx | Dest Port = 4341 | UDP +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | UDP Length | UDP Checksum | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ L |N|L|E| rflags | Nonce | I \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ S / | Locator Status Bits | P +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Version| IHL |Type of Service| Total Length | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Identification |Flags| Fragment Offset | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ IH | Time to Live | Protocol | Header Checksum | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Source EID | \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | Destination EID | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Fixed Destination port

Random Source Port

Source/Destination Locators

Source/Destination Locators

Encap data integrity check

N: Nonce present bitL: Locator Status Bits present bitE: Echo-Nonce request bit

N: Nonce present bitL: Locator Status Bits present bitE: Echo-Nonce request bit

N: Nonce present bitL: Locator Status Bits present bitE: Echo-Nonce request bit

(IP(UDP(LISP(IP))))

94

Monday 28 June 2010

Page 194: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Header details

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Version| IHL |Type of Service| Total Length | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Identification |Flags| Fragment Offset | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ OH | Time to Live | Protocol = 17 | Header Checksum | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Source Routing Locator | \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | Destination Routing Locator | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / | Source Port = xxxx | Dest Port = 4341 | UDP +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | UDP Length | UDP Checksum | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ L |N|L|E| rflags | Nonce | I \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ S / | Locator Status Bits | P +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Version| IHL |Type of Service| Total Length | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Identification |Flags| Fragment Offset | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ IH | Time to Live | Protocol | Header Checksum | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Source EID | \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | Destination EID | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Fixed Destination port

Random Source Port

Source/Destination Locators

Source/Destination Locators

Encap data integrity check

Packet unique identifier

N: Nonce present bitL: Locator Status Bits present bitE: Echo-Nonce request bit

N: Nonce present bitL: Locator Status Bits present bitE: Echo-Nonce request bit

N: Nonce present bitL: Locator Status Bits present bitE: Echo-Nonce request bit

(IP(UDP(LISP(IP))))

94

Monday 28 June 2010

Page 195: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Header details

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Version| IHL |Type of Service| Total Length | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Identification |Flags| Fragment Offset | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ OH | Time to Live | Protocol = 17 | Header Checksum | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Source Routing Locator | \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | Destination Routing Locator | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / | Source Port = xxxx | Dest Port = 4341 | UDP +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | UDP Length | UDP Checksum | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ L |N|L|E| rflags | Nonce | I \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ S / | Locator Status Bits | P +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Version| IHL |Type of Service| Total Length | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Identification |Flags| Fragment Offset | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ IH | Time to Live | Protocol | Header Checksum | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Source EID | \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | Destination EID | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Fixed Destination port

Random Source Port

Source/Destination Locators

Source/Destination Locators

Encap data integrity check

Packet unique identifier

Source locator reachability

N: Nonce present bitL: Locator Status Bits present bitE: Echo-Nonce request bit

N: Nonce present bitL: Locator Status Bits present bitE: Echo-Nonce request bit

N: Nonce present bitL: Locator Status Bits present bitE: Echo-Nonce request bit

(IP(UDP(LISP(IP))))

94

Monday 28 June 2010

Page 196: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Header details

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Version| IHL |Type of Service| Total Length | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Identification |Flags| Fragment Offset | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ OH | Time to Live | Protocol = 17 | Header Checksum | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Source Routing Locator | \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | Destination Routing Locator | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / | Source Port = xxxx | Dest Port = 4341 | UDP +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | UDP Length | UDP Checksum | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ L |N|L|E| rflags | Nonce | I \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ S / | Locator Status Bits | P +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / |Version| IHL |Type of Service| Total Length | / +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Identification |Flags| Fragment Offset | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ IH | Time to Live | Protocol | Header Checksum | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Source EID | \ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | Destination EID | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Fixed Destination port

Random Source Port

Source/Destination Locators

Source/Destination Locators

Encap data integrity check

Packet unique identifier

Source locator reachability

N: Nonce present bitL: Locator Status Bits present bitE: Echo-Nonce request bit

N: Nonce present bitL: Locator Status Bits present bitE: Echo-Nonce request bit

N: Nonce present bitL: Locator Status Bits present bitE: Echo-Nonce request bit

Source/Destination Locators

Source/Destination Identifiers

(IP(UDP(LISP(IP))))

94

Monday 28 June 2010

Page 197: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Src/Dst Locators

• Source locator: IP address of the ITR that performed the encapsulation

• Destination locator: IP address of one ETR responsible for the destination EID’s prefix

• Locators can be in IPv4 or IPv6

95

Monday 28 June 2010

Page 198: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Src/Dst EID

• Source EID: IP address of the source end-host

• Destination EID: IP address of destination end-hosts

• EIDs can be in IPv4 or IPv6

• AFI(RLOC) can be different AFI(EID)

• LISP can be an IPv4/IPv6 transition mechanism (but does not support XAFI)

96

Monday 28 June 2010

Page 199: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP is over UDP

• UDP to traverse firewalls/NAT, limit the impact of ECMP hashing on reordering...

• Source port is random

• but per-flow source port is recommended

• Destination port is fixed to 4341

• Checksum is important if IPv6 RLOCs

97

Monday 28 June 2010

Page 200: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP Control-plane

98

Monday 28 June 2010

Page 201: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP Mapping messages• Map-Request

• request for a mapping

• Map-Reply

• provides the mapping requested by a Map-Request

• Map-Register

• an ETR informs the mapping system that it is responsible for an EID prefix

• provides the RLOCs where the mapping can be found

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | IPv4 or IPv6 Header | | (uses RLOC addresses) | | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / | Source Port = xxxx | Dest Port = 4342 | UDP +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | UDP Length | UDP Checksum | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ LCM | LISP Control Message | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

99

Monday 28 June 2010

Page 202: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Map-Request

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |Type=1 |0|M|P|S| Reserved | Record Count | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Nonce . . . | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | . . . Nonce | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Source-EID-AFI | ITR-AFI | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Source EID Address ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Originating ITR RLOC Address ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / | Reserved | EID mask-len | EID-prefix-AFI | Rec +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | EID-prefix ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Map-Reply Record ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Mapping Protocol Data | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

100

Monday 28 June 2010

Page 203: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Map-Request

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |Type=1 |0|M|P|S| Reserved | Record Count | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Nonce . . . | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | . . . Nonce | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Source-EID-AFI | ITR-AFI | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Source EID Address ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Originating ITR RLOC Address ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / | Reserved | EID mask-len | EID-prefix-AFI | Rec +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | EID-prefix ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Map-Reply Record ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Mapping Protocol Data | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

M: Map-ReplyP: probing bitS: Solicitation bit

M: Map-ReplyP: probing bitS: Solicitation bit

M: Map-ReplyP: probing bitS: Solicitation bit

100

Monday 28 June 2010

Page 204: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Map-Request

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |Type=1 |0|M|P|S| Reserved | Record Count | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Nonce . . . | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | . . . Nonce | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Source-EID-AFI | ITR-AFI | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Source EID Address ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Originating ITR RLOC Address ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / | Reserved | EID mask-len | EID-prefix-AFI | Rec +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | EID-prefix ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Map-Reply Record ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Mapping Protocol Data | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Number of records in the request

M: Map-ReplyP: probing bitS: Solicitation bit

M: Map-ReplyP: probing bitS: Solicitation bit

M: Map-ReplyP: probing bitS: Solicitation bit

100

Monday 28 June 2010

Page 205: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Map-Request

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |Type=1 |0|M|P|S| Reserved | Record Count | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Nonce . . . | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | . . . Nonce | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Source-EID-AFI | ITR-AFI | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Source EID Address ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Originating ITR RLOC Address ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / | Reserved | EID mask-len | EID-prefix-AFI | Rec +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | EID-prefix ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Map-Reply Record ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Mapping Protocol Data | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Number of records in the request

64-bits Nonce, uniquely identifying the request

M: Map-ReplyP: probing bitS: Solicitation bit

M: Map-ReplyP: probing bitS: Solicitation bit

M: Map-ReplyP: probing bitS: Solicitation bit

100

Monday 28 June 2010

Page 206: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Map-Request

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |Type=1 |0|M|P|S| Reserved | Record Count | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Nonce . . . | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | . . . Nonce | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Source-EID-AFI | ITR-AFI | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Source EID Address ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Originating ITR RLOC Address ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / | Reserved | EID mask-len | EID-prefix-AFI | Rec +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | EID-prefix ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Map-Reply Record ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Mapping Protocol Data | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Number of records in the request

64-bits Nonce, uniquely identifying the request

EID of the source that generated the miss

M: Map-ReplyP: probing bitS: Solicitation bit

M: Map-ReplyP: probing bitS: Solicitation bit

M: Map-ReplyP: probing bitS: Solicitation bit

100

Monday 28 June 2010

Page 207: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Map-Request

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |Type=1 |0|M|P|S| Reserved | Record Count | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Nonce . . . | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | . . . Nonce | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Source-EID-AFI | ITR-AFI | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Source EID Address ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Originating ITR RLOC Address ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / | Reserved | EID mask-len | EID-prefix-AFI | Rec +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | EID-prefix ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Map-Reply Record ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Mapping Protocol Data | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Number of records in the request

64-bits Nonce, uniquely identifying the request

EID of the source that generated the miss

RLOC of the ITR to reply to

M: Map-ReplyP: probing bitS: Solicitation bit

M: Map-ReplyP: probing bitS: Solicitation bit

M: Map-ReplyP: probing bitS: Solicitation bit

100

Monday 28 June 2010

Page 208: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Map-Request

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |Type=1 |0|M|P|S| Reserved | Record Count | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Nonce . . . | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | . . . Nonce | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Source-EID-AFI | ITR-AFI | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Source EID Address ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Originating ITR RLOC Address ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ / | Reserved | EID mask-len | EID-prefix-AFI | Rec +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \ | EID-prefix ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Map-Reply Record ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Mapping Protocol Data | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Number of records in the request

64-bits Nonce, uniquely identifying the request

EID of the source that generated the miss

RLOC of the ITR to reply to

EID prefix to retrieve a mapping for

EID prefix to retrieve a mapping for

M: Map-ReplyP: probing bitS: Solicitation bit

M: Map-ReplyP: probing bitS: Solicitation bit

M: Map-ReplyP: probing bitS: Solicitation bit

100

Monday 28 June 2010

Page 209: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Map-Reply

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |Type=2 |P|E| Reserved | Record Count | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Nonce . . . | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | . . . Nonce | +-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Record TTL | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ R | Locator Count | EID mask-len | ACT |A| Reserved | e +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ c | Reserved | EID-AFI | o +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ r | EID-prefix | d +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | /| Priority | Weight | M Priority | M Weight | | L +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | o | Unused Flags |R| Loc-AFI | | c +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | \| Locator | +-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Mapping Protocol Data | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

101

Monday 28 June 2010

Page 210: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Map-Reply

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |Type=2 |P|E| Reserved | Record Count | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Nonce . . . | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | . . . Nonce | +-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Record TTL | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ R | Locator Count | EID mask-len | ACT |A| Reserved | e +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ c | Reserved | EID-AFI | o +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ r | EID-prefix | d +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | /| Priority | Weight | M Priority | M Weight | | L +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | o | Unused Flags |R| Loc-AFI | | c +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | \| Locator | +-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Mapping Protocol Data | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

P: probing bitE: Echo-nonce capable

P: probing bitE: Echo-nonce capable

101

Monday 28 June 2010

Page 211: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Map-Reply

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |Type=2 |P|E| Reserved | Record Count | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Nonce . . . | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | . . . Nonce | +-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Record TTL | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ R | Locator Count | EID mask-len | ACT |A| Reserved | e +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ c | Reserved | EID-AFI | o +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ r | EID-prefix | d +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | /| Priority | Weight | M Priority | M Weight | | L +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | o | Unused Flags |R| Loc-AFI | | c +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | \| Locator | +-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Mapping Protocol Data | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Number of records in the request

P: probing bitE: Echo-nonce capable

P: probing bitE: Echo-nonce capable

101

Monday 28 June 2010

Page 212: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Map-Reply

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |Type=2 |P|E| Reserved | Record Count | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Nonce . . . | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | . . . Nonce | +-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Record TTL | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ R | Locator Count | EID mask-len | ACT |A| Reserved | e +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ c | Reserved | EID-AFI | o +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ r | EID-prefix | d +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | /| Priority | Weight | M Priority | M Weight | | L +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | o | Unused Flags |R| Loc-AFI | | c +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | \| Locator | +-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Mapping Protocol Data | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Number of records in the request

Copied from the Map-Request

P: probing bitE: Echo-nonce capable

P: probing bitE: Echo-nonce capable

101

Monday 28 June 2010

Page 213: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Map-Reply

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |Type=2 |P|E| Reserved | Record Count | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Nonce . . . | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | . . . Nonce | +-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Record TTL | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ R | Locator Count | EID mask-len | ACT |A| Reserved | e +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ c | Reserved | EID-AFI | o +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ r | EID-prefix | d +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | /| Priority | Weight | M Priority | M Weight | | L +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | o | Unused Flags |R| Loc-AFI | | c +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | \| Locator | +-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Mapping Protocol Data | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Number of records in the request

Copied from the Map-Request

Lifetime of the record in minP: probing bitE: Echo-nonce capable

P: probing bitE: Echo-nonce capable

101

Monday 28 June 2010

Page 214: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Map-Reply

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |Type=2 |P|E| Reserved | Record Count | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Nonce . . . | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | . . . Nonce | +-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Record TTL | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ R | Locator Count | EID mask-len | ACT |A| Reserved | e +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ c | Reserved | EID-AFI | o +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ r | EID-prefix | d +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | /| Priority | Weight | M Priority | M Weight | | L +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | o | Unused Flags |R| Loc-AFI | | c +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | \| Locator | +-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Mapping Protocol Data | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Number of records in the request

Copied from the Map-Request

Lifetime of the record in min

Authoritative bit

P: probing bitE: Echo-nonce capable

P: probing bitE: Echo-nonce capable

101

Monday 28 June 2010

Page 215: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Map-Reply

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |Type=2 |P|E| Reserved | Record Count | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Nonce . . . | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | . . . Nonce | +-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Record TTL | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ R | Locator Count | EID mask-len | ACT |A| Reserved | e +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ c | Reserved | EID-AFI | o +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ r | EID-prefix | d +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | /| Priority | Weight | M Priority | M Weight | | L +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | o | Unused Flags |R| Loc-AFI | | c +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | \| Locator | +-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Mapping Protocol Data | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Number of records in the request

Copied from the Map-Request

Lifetime of the record in min

Authoritative bit

Negative reply action

P: probing bitE: Echo-nonce capable

P: probing bitE: Echo-nonce capable

101

Monday 28 June 2010

Page 216: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Map-Reply

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |Type=2 |P|E| Reserved | Record Count | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Nonce . . . | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | . . . Nonce | +-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Record TTL | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ R | Locator Count | EID mask-len | ACT |A| Reserved | e +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ c | Reserved | EID-AFI | o +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ r | EID-prefix | d +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | /| Priority | Weight | M Priority | M Weight | | L +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | o | Unused Flags |R| Loc-AFI | | c +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | \| Locator | +-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Mapping Protocol Data | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Number of records in the request

Copied from the Map-Request

Lifetime of the record in min

Authoritative bit

Negative reply action

Priority : RLOCs with lower priority are preferred. If several have same priority, load balance among themWeight : percentage of traffic to this RLOC when load balancing is active.(M for multicast)

P: probing bitE: Echo-nonce capable

P: probing bitE: Echo-nonce capable

101

Monday 28 June 2010

Page 217: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Map-Reply

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |Type=2 |P|E| Reserved | Record Count | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Nonce . . . | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | . . . Nonce | +-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Record TTL | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ R | Locator Count | EID mask-len | ACT |A| Reserved | e +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ c | Reserved | EID-AFI | o +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ r | EID-prefix | d +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | /| Priority | Weight | M Priority | M Weight | | L +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | o | Unused Flags |R| Loc-AFI | | c +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | \| Locator | +-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Mapping Protocol Data | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Number of records in the request

Copied from the Map-Request

Lifetime of the record in min

Authoritative bit

Negative reply action

Priority : RLOCs with lower priority are preferred. If several have same priority, load balance among themWeight : percentage of traffic to this RLOC when load balancing is active.(M for multicast)Is record is reachable from responder’s viewpoint ?

P: probing bitE: Echo-nonce capable

P: probing bitE: Echo-nonce capable

101

Monday 28 June 2010

Page 218: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

NERD: A Not-so-novel EID to RLOC Database

102

Monday 28 June 2010

Page 219: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

NERD• The only proposed push model

• Composed of 4 parts

• a network database format;

• a change distribution format;

• a database retrieval/bootstrapping method;

• a change distribution method

• Principles

• An authority computes the mapping database based on the stored registrations

• The database signed by the authority is stored on servers

• ITR poll regularly the database servers to update their own mapping database

103

Monday 28 June 2010

Page 220: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP-DHT

104

Monday 28 June 2010

Page 221: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP-DHT

• Distribute the storage of the mappings on a distributed hash table

• Storage: DHT

• Control plane

• build over a modified chord ring

• able to enforce the position where the mappings have to be stored (e.g., one’s does not want to have its mappings stored by a competitor)

[DHT] LISP-DHT: Towards a DHT to map identifiers onto locators, Mathy and Iannone, Rearch, 2008

105

Monday 28 June 2010

Page 222: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP-DHT

• Has been proved to provide bad behaviors in the Internet

• hot-spots

• low TE capabilities

• no control on the path followed by the requests

• Still a good idea for other scenarios?

106

Monday 28 June 2010

Page 223: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP-TREE

107

Monday 28 June 2010

Page 224: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP-Tree

• DNS like approach

• Why a DNS-like mapping system?

• Troubleshooting and fault tolerance

• Scalability

• Security

• Impact of configuration errors

• Experience

108

Monday 28 June 2010

Page 226: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP-Tree Iterative

110

Monday 28 June 2010

Page 227: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

LISP-Tree Recursive

111

Monday 28 June 2010

Page 228: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

2 4 6 8 10 12 14 16 18

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

# of hops

CD

F

LISP!TREE (Iterative)LISP!TREE (Recursive)LISP+ALTLISP!DHT

Evaluation: Hop-Count

112

Monday 28 June 2010

Page 229: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

0 2 4 6 8 10 12 14 16 180

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

Map!stretch factor

CD

F

LISP!TREE (Iterative)LISP!TREE (Recursive)LISP+ALTLISP!DHT

Evaluation: Map-stretch

113

• Map-stretch ratio: total mapping resolution time / ITR to ETR RTT

Monday 28 June 2010

Page 230: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Solving the reachability problem with the SMR bit

• ETR1 has been decommissioned and ETR2 wants that all the sites currently sending encapsulated data to itself update the mapping

a.1.2.3

b.1.2.3

C/cETR1

ETR2

ITR

C/c>a.1.2.3, p=1 b.1.2.3, p=2

114

Monday 28 June 2010

Page 231: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Solving the reachability problem with the SMR bit

• ETR1 has been decommissioned and ETR2 wants that all the sites currently sending encapsulated data to itself update the mapping

b.1.2.3

C/c

ETR2

ITR

C/c>a.1.2.3, p=1 b.1.2.3, p=2

114

Monday 28 June 2010

Page 232: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Solving the reachability problem with the SMR bit

• ETR1 has been decommissioned and ETR2 wants that all the sites currently sending encapsulated data to itself update the mapping

b.1.2.3

C/c

ETR2

ITR

C/c>a.1.2.3, p=1 b.1.2.3, p=2

SMR =1

Map-Request

114

Monday 28 June 2010

Page 233: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Solving the reachability problem with the SMR bit

• ETR1 has been decommissioned and ETR2 wants that all the sites currently sending encapsulated data to itself update the mapping

b.1.2.3

C/c

ETR2

ITR

C/c>a.1.2.3, p=1 b.1.2.3, p=2

SMR =1

Map-Request

114

Monday 28 June 2010

Page 234: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Solving the reachability problem with the SMR bit

• ETR1 has been decommissioned and ETR2 wants that all the sites currently sending encapsulated data to itself update the mapping

b.1.2.3

C/c

ETR2

ITR

C/c>a.1.2.3, p=1 b.1.2.3, p=2

nonce = 1234

Map-Request

114

Monday 28 June 2010

Page 235: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Solving the reachability problem with the SMR bit

• ETR1 has been decommissioned and ETR2 wants that all the sites currently sending encapsulated data to itself update the mapping

b.1.2.3

C/c

ETR2

ITR

C/c>a.1.2.3, p=1 b.1.2.3, p=2

nonce = 1234

Map-Request

114

Monday 28 June 2010

Page 236: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Solving the reachability problem with the SMR bit

• ETR1 has been decommissioned and ETR2 wants that all the sites currently sending encapsulated data to itself update the mapping

b.1.2.3

C/c

ETR2

ITR

C/c>a.1.2.3, p=1 b.1.2.3, p=2

nonce = 1234

Map-Reply

114

Monday 28 June 2010

Page 237: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Solving the reachability problem with the SMR bit

• ETR1 has been decommissioned and ETR2 wants that all the sites currently sending encapsulated data to itself update the mapping

b.1.2.3

C/c

ETR2

ITR

C/c>a.1.2.3, p=1 b.1.2.3, p=2

nonce = 1234

Map-Reply

114

Monday 28 June 2010

Page 238: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Solving the reachability problem with the SMR bit

• ETR1 has been decommissioned and ETR2 wants that all the sites currently sending encapsulated data to itself update the mapping

b.1.2.3

C/c

ETR2

ITR

C/c>a.1.2.3, p=1 b.1.2.3, p=2

nonce = 1234

Map-Reply

C/c>b.1.2.3, p=1

114

Monday 28 June 2010

Page 239: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

Solving the reachability problem with the SMR bit

• ETR1 has been decommissioned and ETR2 wants that all the sites currently sending encapsulated data to itself update the mapping

b.1.2.3

C/c

ETR2

ITR

C/c>a.1.2.3, p=1 b.1.2.3, p=2

C/c>b.1.2.3, p=1

114

Monday 28 June 2010

Page 240: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

The life of a packet in an ITR

115

p received

is p.dest an EID?

mapping for p.dest?

encapsulate p

legacy forwarding

no

query mapping system

cache miss

drop

EID does not exist

Monday 28 June 2010

Page 241: LISP - UCLouvain · 6/28/2010  · LISP (Locator/Identifier Separation Protocol) Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe,

The life of a packet in an ETR

116

p received

is p a LISP packet?

decapsulate p

legacy forwarding

no

Monday 28 June 2010