1 802.1ag discussion may 18, 2004 ali sajassi [email protected] paul bottorf...

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1 802.1ag Discussion May 18, 2004 Ali Sajassi [email protected] Paul Bottorf [email protected]

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Page 1: 1 802.1ag Discussion May 18, 2004 Ali Sajassi sajassi@cisco.com Paul Bottorf pbottorf@nortelnetworks.com sajassi@cisco.com pbottorf@nortelnetworks.com

1

802.1ag Discussion

May 18, 2004

Ali [email protected]

Paul [email protected]

Page 2: 1 802.1ag Discussion May 18, 2004 Ali Sajassi sajassi@cisco.com Paul Bottorf pbottorf@nortelnetworks.com sajassi@cisco.com pbottorf@nortelnetworks.com

222

Where are we ?

• We have come along a long way since first preso on this topic to 802.1 group was made a year ago (June 2003)

• Since then, lots of work has been done in ITU and MEF

• Since then, many presentations/contributions (in coordination with ITU & MEF) have been made on this topic to this group

• Since then, a PAR has been approved

Page 3: 1 802.1ag Discussion May 18, 2004 Ali Sajassi sajassi@cisco.com Paul Bottorf pbottorf@nortelnetworks.com sajassi@cisco.com pbottorf@nortelnetworks.com

333

What’s the Scope ?

• The following Connectivity Fault Management functionality

- Fault Detection: Continuity Check

- Fault Verification: Loop Back

- Fault Isolation: Trace Route

• Concept of Domain & Domain Level

• Concept of Maintenance Entity

- Maintenance End Point (MEP)

- Maintenance Intermediate Point (MIP)

Page 4: 1 802.1ag Discussion May 18, 2004 Ali Sajassi sajassi@cisco.com Paul Bottorf pbottorf@nortelnetworks.com sajassi@cisco.com pbottorf@nortelnetworks.com

444

What’s outside of the Scope ?

• Performance Management Functionality such as

- Frame Loss Measurement

- Delay Measurement

- Delay Variation Measurement

- Availability Measurement

• Connectivity Fault Indication such as AIS and alarm suppression ?

• Connectivity Fault Recovery (it is assumed to be taken care by xSTP) – e.g., not intention to do protection switching here

Page 5: 1 802.1ag Discussion May 18, 2004 Ali Sajassi sajassi@cisco.com Paul Bottorf pbottorf@nortelnetworks.com sajassi@cisco.com pbottorf@nortelnetworks.com

555

What’s need to be decided ?

• Where to put the Maintenance Entity

- What functionality is needed at different MAC sub-layers

- What functionality is needed at LLC level

- How to model a bridge

• Domain Level- Absolute versus Relative

- Multicast versus Unicast traffic

Page 6: 1 802.1ag Discussion May 18, 2004 Ali Sajassi sajassi@cisco.com Paul Bottorf pbottorf@nortelnetworks.com sajassi@cisco.com pbottorf@nortelnetworks.com

666

Maintenance Entity

• 802.1ad defines three types of services- Port based

- VLAN based

- VLAN bundling

• ITU defined Maintenance Points based on IEEE Provider Bridge models for the above services

• Now need to define IEEE bridge model(s) for these Maintenance Points

Page 7: 1 802.1ag Discussion May 18, 2004 Ali Sajassi sajassi@cisco.com Paul Bottorf pbottorf@nortelnetworks.com sajassi@cisco.com pbottorf@nortelnetworks.com

777

Port-based Service

C-Tag

CustomerEquipment

CustomerEquipment

Operator ABridges

Operator BBridges

ETH

1 2b 3 4 5 6b 7

11122122

10S-Tag

Untagged

Page 8: 1 802.1ag Discussion May 18, 2004 Ali Sajassi sajassi@cisco.com Paul Bottorf pbottorf@nortelnetworks.com sajassi@cisco.com pbottorf@nortelnetworks.com

888

802.1Q T

agg

ing

“Y”80

2.1Q

Tag

gin

g “

Y”

Provider Bridge: S-VLAN aware component - 2b

LLCHigher Layer Entities

LLC LLC

802.

1ag

Up

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802.

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p C

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802.1ag D

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Relay

LLCLLC LLC

MEP

MEP

MIPMIPMIPMIP MIPMIP

Page 9: 1 802.1ag Discussion May 18, 2004 Ali Sajassi sajassi@cisco.com Paul Bottorf pbottorf@nortelnetworks.com sajassi@cisco.com pbottorf@nortelnetworks.com

999

C-Tag

CustomerEquipment

CustomerEquipment

Operator ABridges

Operator BBridges

ETH

1 2a 2b 3 4 5 6b 6a 7

11122122

11122122

1020S-Tag

Untagged

C-Tag

VLAN Bundling Service

Page 10: 1 802.1ag Discussion May 18, 2004 Ali Sajassi sajassi@cisco.com Paul Bottorf pbottorf@nortelnetworks.com sajassi@cisco.com pbottorf@nortelnetworks.com

101010

802.1Q T

agg

ing

“Y”80

2.1Q

Tag

gin

g “

Y”

C-VLAN aware Component – 2a

LLCHigher Layer Entities

LLC LLC

802.

1ag

Up

CM

Sh

im

802.

1ag

Do

wn

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p C

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Relay

LLCLLC LLC

MIP

MEP

MIP

MEP

MIP

MEP

MIP

MEP

Page 11: 1 802.1ag Discussion May 18, 2004 Ali Sajassi sajassi@cisco.com Paul Bottorf pbottorf@nortelnetworks.com sajassi@cisco.com pbottorf@nortelnetworks.com

111111

802.1Q T

agg

ing

“Y”80

2.1Q

Tag

gin

g “

Y”

S-VLAN aware component – 2b

LLCHigher Layer Entities

LLC LLC

802.

1ag

Up

CM

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802.

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Do

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LLCLLC LLC

MEP

MEP

MIP

MEP

MEP

MIP

Page 12: 1 802.1ag Discussion May 18, 2004 Ali Sajassi sajassi@cisco.com Paul Bottorf pbottorf@nortelnetworks.com sajassi@cisco.com pbottorf@nortelnetworks.com

121212

Different ways of Implementing ITU models

1. Bridge “Brain” LLC

2. Bridge Port LLC

3. Bridge Port MAC sub-layer

Page 13: 1 802.1ag Discussion May 18, 2004 Ali Sajassi sajassi@cisco.com Paul Bottorf pbottorf@nortelnetworks.com sajassi@cisco.com pbottorf@nortelnetworks.com

131313

Bridge “Brain” LLC

Page 14: 1 802.1ag Discussion May 18, 2004 Ali Sajassi sajassi@cisco.com Paul Bottorf pbottorf@nortelnetworks.com sajassi@cisco.com pbottorf@nortelnetworks.com

141414

Bridge Port LLC

Page 15: 1 802.1ag Discussion May 18, 2004 Ali Sajassi sajassi@cisco.com Paul Bottorf pbottorf@nortelnetworks.com sajassi@cisco.com pbottorf@nortelnetworks.com

151515

Bridge Port MAC sub-layer

Page 16: 1 802.1ag Discussion May 18, 2004 Ali Sajassi sajassi@cisco.com Paul Bottorf pbottorf@nortelnetworks.com sajassi@cisco.com pbottorf@nortelnetworks.com

161616

802.1ad Model

Clause 6.5

MAC RelayEntity

Clause 6.5

Clauses8.5, 6.7,S-TAG

Clauses8.5, 6.7,

S-TAG

C-VLAN awareBridge

S-VLAN awareBridge

ISSISS

Clause 6.5 Clause 6.5

MAC RelayClauses8.5, 6.7,9.5 (b)

Clauses8.5, 6.7,

9.5(b)ISSISS

Provider Bridge

Page 17: 1 802.1ag Discussion May 18, 2004 Ali Sajassi sajassi@cisco.com Paul Bottorf pbottorf@nortelnetworks.com sajassi@cisco.com pbottorf@nortelnetworks.com

171717

802.1ag Model – Which one ?

C-VLAN awareBridge

S-VLAN awareBridge

Clause 6.5 Clause 6.5

MAC Relay

Provider Bridge

ISSISS

(2) (1)

(3)

MAC Relay

(2) (2)(1)

(3)(3)

Clause 6.5 Clause 6.5

ISSISS