ipv6 subnetting - files.maunier.orgfiles.maunier.org/frnog-ipv6-subnetting.pdf · -32 bits in ipv4...

IPv6 subnetting

Pierre-Yves Maunier – 11/03/2010 – FRnOG 17 Meeting

[email protected]

1/185

IPv6 for LIRsMarch 2011

IANA IPv4 Pool

2

0%

10%

20%

30%

40%

2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011

The Registry System

IP Address Distribution

8

Allocation PA Assignment PI Assignment

IANA

End User

LIR

RIR

/3

/32

/12

/56/48 /48

Our Slice of the IPv4 Pie

APNIC

ARIN

LACNIC

AfriNIC

Organisations

Other IANA

13

RIPE NCC

IPv6 Address Basics

• IPv6 address: 128 bits- 32 bits in IPv4

• Every subnet should be a /64

• Customer assignments (sites) between:- /64 (1 subnet)- /48 (65,536 subnets)

• Minimum allocation size /32- 65,536 /48s- 16,777,216 /56s

30

Multiple addresses

32

Addresses Range ScopeLoopback ::1 hostLink Local fe80::/10 link Unique Local fc00::/7 siteGlobal Unicast 2000::/3 global6to4 2002::/16 globalMulticast ff00::/8 variableTeredo 2001::/32 global

IPv6 Allocations and Announcements

43

0

1000

2000

3000

4000

5000

6000

2004 2005 2006 2007 2008 2009 2010 2011

RIPE NCC AllocationsTotal Worldwide AllocationsTotal Worldwide Announcements

IPv6 Subnetting

/64

2001:0DB8:0000:0000:0000:0000:0000:000064 bits interface ID

/60 = 16 * /64

/56 = 256 * /64

/48 = 65536 * /64/44 = 16 * /48

/40 = 256 * /48

/32 = 65536 * /48Pierre-Yves Maunier – 11/03/2010 – FRnOG 17 Meeting

[email protected]

Example 1 :FooBar Networks● International Transit Provider● LIR● Allocation : 2001:0db8::/32● Provides various services

● Static IP Transit connectivity● BGP Transit connectivity● All services are provided on multiple countries


[email protected]

2001:0db8:0000::/40 Foobar Infra + Future Use

2001:0db8:0100::/40 Customer Blocks

2001:0db8:0200::/40 Future use…..........................................

2001:0db8:ff00::/40 Future use

1 * /32 = 256 * /40

2001:0db8::/32 : ALLOCA\TION OF FOOBAR Networks International Backbone providing IP connectivity

2001:0db8:0000::/402001:0db8:0000::/44 FOOBAR INFRA 16 * /48

2001:0db8:0010::/44 Future use…

2001:0db8:00f0::/44 Future use2001:0db8:0100::/40 Customer Blocks

2001:0db8:0200::/40 Future Use

2001:0db8:ff00::/40 Future Use

2001:0db8::/32 : ALLOCATION OF FOOBAR Networks International Backbone providing IP connectivity

Foobar Infra + Future Use

…..........................................

2001:0db8:0000::/402001:0db8:0000::/44 FOOBAR INFRA

2001:0db8:0000::/48 Backbone addresses2001:0db8:0010::/44 Future use

…2001:0db8:00f0::/44 Future use


2001:0db8:0200::/40 Future Use




…..........................................


2001:0db8:0000::/48 Backbone addresses2001:0db8:0000:0000::/562001:0db8:0000:0100::/56

2001:0db8:0010::/44 Future use…


2001:0db8:0200::/40 Future Use




Routers loopbacks + intercosCustomers Interco

…..........................................


2001:0db8:0000::/48 Backbone addresses2001:0db8:0000:0000::/56

2001:0db8:0000:0000::/642001:0db8:0000:0001::/642001:0db8:0000:0002::/64

2001:0db8:0000:0005::/642001:0db8:0000:0006::/64

2001:0db8:0000:0100::/562001:0db8:0000:0100::/64 unused2001:0db8:0000:0101::/64 unused2001:0db8:0000:0102::/64 unused

etc

2001:0db8:0010::/44 Future use…


2001:0db8:0200::/40 Future Use




Routers loopbacks + intercosRouters loopbacksPNI intercosInternationals Links intercos

2001:0db8:0000:0003::/64 FR routers intercos2001:0db8:0000:0004::/64 UK routers intercos

DE routers intercosNL routers intercos

Customers Intercos

2001:0db8:0000:0103::/64 FR customers intercos2001:0db8:0000:0104::/64 UK customers intercos

…..........................................


2001:0db8:0000::/48 backbone addresses2001:0db8:0001:0000::/56

2001:0db8:0001:0000::/642001:0db8:0001:0000::1/128 cr1.paris2001:0db8:0001:0000::2/128 cr2.paris2001:0db8:0001:0000::3/128 cr1.london

2001:0db8:0001:0000:192:168:0:1/128 cr1.paris2001:0db8:0001:0001::/642001:0db8:0001:0001::0000/126 PNI Wan One AS11112001:0db8:0001:0001::0004/126 PNI Too Two AS22222001:0db8:0001:0002::/64

2001:0db8:0001:0002::0000/126 cr1.paris – cr1.london2001:0db8:0001:0002::0004/126 cr2.london – cr1.amsterdam2001:0db8:0001:0002::0008/126 cr2.amsterdam – cr1.frankfurt

2001:0db8:0001:0003::/642001:0db8:0001:0003::0000/126 cr1.paris – cr2.paris2001:0db8:0001:0003::0004/126 cr1.paris – er1.paris

2001:0db8:0001:0004::/642001:0db8:0001:0004::0000/126 cr1.london – cr2.london2001:0db8:0001:0004::0004/126 cr1.london – er1.london

2001:0db8:0001:0005::/642001:0db8:0001:0005::0000/126 cr1.frankfurt – cr2.frankfurt2001:0db8:0001:0005::0004/126 cr1.frankfurt – er1.frankfurt

2001:0db8:0001:0006::/642001:0db8:0001:0006::0000/126 cr1.amsterdam – cr2.amsterdam2001:0db8:0001:0006::0004/126 cr1.amsterdam – er1.amsterdam

2001:0db8:0001:0100::/562001:0db8:0001:0103::/64

2001:0db8:0001:0103::0000/1262001:0db8:0001:0104::/64

2001:0db8:0001:0104::0000/1262001:0db8:0001:0104::0004/1262001:0db8:0001:0104::0008/1262001:0db8:0001:0104::000c/1262001:0db8:0001:0104::0010/1242001:0db8:0001:0104::0020/126



routers loopbacks + intercosRouters loopbacks

or we perform a match with the IPv4 loopbacks(loopback IPv4 : 192.168.0.1)

Intercos : PNI

International Intercos

FR routers Interco

UK routers Interco

DE routers Interco

NL routers Interco

Customers IntercoFR customers IntercoFrench customer interco #1UK customers IntercoEnglish customer interco #1English customer interco #2English customer interco #3English customer interco #4English customer interco #5 (2 HA Firewalls on customer side)English customer interco #6

2001:0db8:0000::/40


2001:0db8:0200::/40 Future use


1 * /32 = 256 * /40



…..........................................

2001:0db8:0000::/40

2001:0db8:0100::/40 Customer Blocks2001:0db8:0100::/44 /56 Customers 4096 * /56 in a /44

2001:0db8:0110::/44 16 * /48 in a /44

2001:0db8:0120::/442001:0db8:0200::/40 Future use

…..........................................2001:0db8:ff00::/40 Future use



/48 Customers - 1st Block/48 Customers - 2nd Block



2001:0db8:0100::/48 unused2001:0db8:0101::/48 unused2001:0db8:0102::/48 unused2001:0db8:0103::/48 FR Customers2001:0db8:0104::/48 UK Customers

2001:0db8:0110::/44 16 * /48 in a /44

2001:0db8:0110::/48 Customer #01 in whatever country


2001:0db8:0112::/48 Customer #03 in whatever country…

2001:0db8:011f::/48 Customer #16 in whatever country

2001:0db8:0120::/442001:0db8:0200::/40 Future use

…..........................................2001:0db8:ff00::/40 Future use


/48 Customers - 1st Block

/48 Customers - 2nd Block



2001:0db8:0100::/48 unused2001:0db8:0101::/48 unused2001:0db8:0102::/48 unused2001:0db8:0103::/48 FR Customers

2001:0db8:0103:0000::/562001:0db8:0103:0100::/56

2001:0db8:0104::/48 UK Customers2001:0db8:0104:0000::/562001:0db8:0104:0100::/56

2001:0db8:0110::/44 16 * /48 in a /44



2001:0db8:0112::/48 Customer #03 in whatever country…

2001:0db8:011f::/48 Customer #16 in whatever country

2001:0db8:0120::/442001:0db8:0200::/40 Future use



/56 cust #1 in France/56 cust #2 in France

/56 cust #1 in UK/56 cust #2 in UK/48 Customers - 1st Block


…..........................................

Example 2 :FooBar Networks● Hosting Company● LIR● Allocation : 2001:0db8::/32● Provides various services

● Static IP Transit connectivity● BGP Transit connectivity● Hosting on 2 datacenters


[email protected]

2001:0db8:0000::/40


2001:0db8:0200::/40 Futures Use

2001:0db8:ff00::/40 Futures Use

1 * /32 = 256 * /40

2001:0db8::/32 : ALLOCATION OF FOOBAR Networks :Hosti\ng + Tra\nsit services


…..........................................

2001:0db8:0000::/402001:0db8:0000::/442001:0db8:0010::/44 Future use


2001:0db8:0200::/40 Futures Use


2001:0db8::/32 : ALLOCATION OF FOOBAR Networks :Hosting + Transit services

Foobar Infra + Future UseFoobar Infra

…...................................

…..........................................

2001:0db8:0000::/402001:0db8:0000::/44

2001:0db8:0000::/48 Backbone addresses2001:0db8:0001::/482001:0db8:0002::/48

2001:0db8:0010::/44 Future use


2001:0db8:0200::/40 Futures Use




Hosting TelecityHosting Telehouse 2

…...................................

…..........................................

2001:0db8:0000::/402001:0db8:0000::/44

2001:0db8:0000::/48 Backbone addresses2001:0db8:0000:0000::/562001:0db8:0000:0100::/56

2001:0db8:0001::/482001:0db8:0002::/48

2001:0db8:0010::/44 Future use


2001:0db8:0200::/40 Futures Use




Routers loopbacks + intercosFoobar InfraHosting TelecityHosting Telehouse 2

…...................................

…..........................................

2001:0db8:0000::/402001:0db8:0000::/44


2001:0db8:0000:0000::/642001:0db8:0000:0001::/642001:0db8:0000:0002::/642001:0db8:0000:0003::/642001:0db8:0000:0004::/64

2001:0db8:0000:0100::/562001:0db8:0000:0100::/64 Primary DNS2001:0db8:0000:0101::/64 Secondary DNS2001:0db8:0000:0102::/64 Monitoring

2001:0db8:0001::/48If we use DECIMAL translationIf we use DECIMAL translation118 HEX = 280 DEC

2001:0db8:0002::/48

2001:0db8:0010::/44 Future use





Routers loopbacks + intercosRouters loopbacksIntercos : PNIIntercos : RoutersIntercos : BGP CustomersIntercos : Statics Customers

Foobar Infra

Hosting Telecity2001:0db8:0001:0100::/64 Customers VLAN 1002001:0db8:0001:0115::/64 Customers VLAN 1152001:0db8:0001:0118::/64 Customers VLAN 280

Hosting Telehouse 22001:0db8:0002:0025::/64 Customers VLAN 25

2001:0db8:0002:0027::/64 Customers VLAN 27

…...................................

…..........................................

2001:0db8::/32 : ALLOCATION OF FOOBAR Networks : Hosting + Transit services

2001:0db8:0000::/402001:0db8:0000::/44


2001:0db8:0000:0000::/642001:0db8:0000:0000::1/1282001:0db8:0000:0000::2/1282001:0db8:0000:0000::3/1282001:0db8:0000:0000::4/128

2001:0db8:0000:0000:192:168:0:1/128

2001:0db8:0000:0001::/642001:0db8:0000:0001::0000/126 PNI Peer #1 AS11112001:0db8:0000:0001::0004/126 PNI Peer #2 AS2222

2001:0db8:0000:0002::/642001:0db8:0000:0002::0000/126 core1.telecity – core2.telecity2001:0db8:0000:0002::0004/126 core2.telecity – core1.th22001:0db8:0000:0002::0008/126 core2.telecity – core2.th22001:0db8:0000:0002::000c/126 core2.th2 – core1.th2

2001:0db8:0000:0003::/642001:0db8:0000:0003::0000/1262001:0db8:0000:0003::0004/126

2001:0db8:0000:0004::/64

2001:0db8:0000:0100::/562001:0db8:0000:0100::/64 Primary DNS2001:0db8:0000:0101::/64 Secondary DNS2001:0db8:0000:0102::/64 Monitoring

2001:0db8:0000:0102::00012001:0db8:0000:0102::0002 nachos2001:0db8:0000:0102::0003 cactus

2001:0db8:0001::/48If we use DECIMAL translationIf we use DECIMAL translation118 HEX = 280 DEC

2001:0db8:0002::/48


Routers loopbacks + intercosRouters loopbackscore1 Telecitycore2 Telecitycore1 Telehouse 2core2 Telehouse 2

or we perform a match with the IPv4 loopbackscore1 Telecity (loopback IPv4 : 192.168.0.1) ….

Intercos : PNI

Intercos : Routers

Intercos : BGP Customerscust #1 telecitycust #2 telehouse 2Intercos : Statics Customers

/126 equivalent to /30 IPv4 : 2 usable IPs/124 equivalent to /28 IPv4 : 14 usable IPs

We will prefer /124 over /125 (equivalent to /29 IPv4) : easier to subnetFoobar Infra

core1 Telecity Gateway

Hosting Telecity2001:0db8:0001:0100::/64 Customers VLAN 1002001:0db8:0001:0115::/64 Customers VLAN 1152001:0db8:0001:0118::/64 Customers VLAN 280

Hosting Telehouse 22001:0db8:0002:0025::/64 Customers VLAN 252001:0db8:0002:0027::/64 Customers VLAN 27

2001:0db8:0000::/40


2001:0db8:0200::/40 Futures Use


1 * /32 = 256 * /40



…..........................................

2001:0db8:0000::/402001:0db8:0100::/40 Customer Blocks

2001:0db8:0100::/44 /56 Customers 2048 * /56 in a /442001:0db8:0110::/44 16 * /48 in a /442001:0db8:0120::/44

…2001:0db8:01f0::/44

2001:0db8:0200::/40 Future Use


-

-



/48 Customers - 1st Block/48 Customers - 2nd Block

/48 Customers - 15th Block

…..........................................

Best practices states that we allocate a /48 or a /56 to the customer. It depends on what we want to do and what the customer want. This is just an example of what we can do.

For example if a static customer has a router, we have a interco block (/126) and we routea /48 or /56 on his router. Then he will be able to subnet his block as he wants.

If the customer does not have any router, we can allocate him a /56 or /48 (depending on theirFuture needs) but we directly configure the first /64 on our router to provide him the connectivity.

2001:0db8:0000::/402001:0db8:0100::/40 Customer Blocks

2001:0db8:0100::/44 /56 Customers 2048 * /56 in a /442001:0db8:0100::/48

2001:0db8:0100:0000::/56 Customer #12001:0db8:0100:0100::/56 Customer #2

2001:0db8:0101::/482001:0db8:0101:0000::/56 Customer #32001:0db8:0101:0100::/56 Customer #4

2001:0db8:0110::/44 16 * /48 in a /442001:0db8:0110::/48 Customer #1002001:0db8:0111::/48 Customer #1012001:0db8:0112::/48 Customer #102…2001:0db8:011f::/48 Customer #115

2001:0db8:0120::/44…

2001:0db8:01f0::/44


With this configuration, 1*/40 can host 2048 * /56 customers and 240 * /48 customers

We can also use this /40 to host 256 * /56 customers and 255 * /48 customers



IPv6 Cust @ Telecity

IPv6 Cust @ Telehouse 2

/48 Customers - 1st Block


/48 Customers - 15th Block…..........................................

Ripe Document :


[email protected]

http://www.ripe.net/training/material/IPv6-for-LIRs-Training-Course/IPv6-for-LIRs-Training-Slides.pdf

http://www.ripe.net/training/material/IPv6-for-LIRs-Training-Course/IPv6-for-LIRs-Training-Slides.pdf

Questions ?(vite avant la pause café)


[email protected]

ipv6 subnetting - files.maunier.orgfiles.maunier.org/frnog-ipv6-subnetting.pdf · -32 bits in ipv4...

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