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Ethernet OAM Maintenance Entities in ITU-T Q.3/13. Dinesh Mohan Paul Bottorff. Nortel Networks. OAM Layering. Ethernet Layer. Ethernet OAM Layering. Customer. Service Provider. Customer. Eth Access. MPLS Core. MPLS Access. Device View. CE. U-PE. B. B. N-PE. P. P. P. N-PE. P.

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slide1

Ethernet OAM

Maintenance Entities in ITU-T Q.3/13

Dinesh Mohan Paul Bottorff

Nortel Networks

ethernet oam layering

Ethernet Layer

Ethernet OAM Layering

Customer

Service Provider

Customer

Eth Access

MPLS Core

MPLS Access

Device View

CE

U-PE

B

B

N-PE

P

P

P

N-PE

P

U-PE

CE

  • An example to highlight network/service involving Ethernet and other technologies
  • The Ethernet Layer implies the visibility to Ethernet frames
oam domain service network
OAM Domain – Service/Network

Customer

Service Provider

Customer

Eth Access

MPLS Core

MPLS Access

Customer Domain

Provider Domain

Operator Domain

Operator Domain

Operator Domain

  • Domains concept is necessary to contain OAM flows & bound OAM responsibilities
maintenance entity points mep maintenance intermediate points mip

Maintenance Entity Point

Maintenance Intermediate Point

Maintenance Entity Points (MEP) & Maintenance Intermediate Points (MIP)

Customer

Service Provider

Customer

Eth Access

MPLS Core

MPLS Access

Customer Domain

Service OAM

Provider Domain

Operator Domain

Operator Domain

Operator Domain

Network OAM

PW/MPLS OAM

MPLS Domain

MPLS Domain

  • Location of MEPs and MIPs is dependent on Business Models & Deployment Scenarios
slide6

Services

Service OAM

Network

Network OAM

Transport Links

Ethernet link OAM

PW/MPLS

OAM

EoSONET OAM

Other OAM

Service/Network OAM – How does it come together?

  • OAM Interworking possible to utilize OAM across Layers
  • However, each layer must support OAM capabilities independently
networks using meps mips

CustomerEquipment

Operator ABridges

Operator BBridges

CustomerEquipment

ETH or

SRV

Networks using MEPs & MIPs

1

2

3

4

5

6

7

8

9

ETH

Maintenance Entity Point

Maintenance Intermediate Point

  • MEPs and MIPs used to identify Maintenance Entities (MEs)
  • MEs identifies what need to be managed
slide9

Dual Relay Model

as

Single Integrated Provider Device

mep mip tcp for dual relay model single integrated provider device

CustomerEquipment

Operator ABridges

Operator BBridges

CustomerEquipment

1

2a

2b

3

4

5

6b

6a

7

ETH

MEP, MIP, TCP for Dual-Relay Model:Single Integrated Provider Device
  • 2a and 6a allow for peering of L2CP + multiplexing of user flows
  • Additional MEs may need to be managed
customer bridge 1 example without eth link me

Higher Layer Entities

LLC

LLC

LLC

LLC

LLC

LLC

Relay

802.1Q Tagging “Y”

802.1Q Tagging “Y”

802.1ag Up CM Shim

802.1ag Up CM Shim

802.1ag Down CM Shim

802.1ag Down CM Shim

MEP

Customer Bridge 1Example without ETH link ME
provider bridge 2a example without eth link me

Relay

Provider Bridge 2aExample without ETH link ME

Higher Layer Entities

LLC

LLC

LLC

LLC

LLC

LLC

802.1Q Tagging “Y”

802.1Q Tagging “Y”

802.1ag Up CM Shim

802.1ag Up CM Shim

802.1ag Down CM Shim

802.1ag Down CM Shim

MEP

MIP

MIP

MEP

provider bridge 2b example without eth link me

Relay

Provider Bridge 2bExample without ETH link ME

Higher Layer Entities

LLC

LLC

LLC

LLC

LLC

LLC

MEP

802.1Q Tagging “Y”

802.1Q Tagging “Y”

802.1ag Up CM Shim

802.1ag Up CM Shim

802.1ag Down CM Shim

802.1ag Down CM Shim

MEP

MIP

MIP

slide14

Dual Relay Model

with

Single Relay as Provider Device

mep mip tcp for dual relay model single relay as provider device

CustomerEquipment

Operator ABridges

Operator BBridges

CustomerEquipment

1

2b

3

4

5

6b

7

MEP, MIP, TCP for Dual-Relay Model:Single Relay as Provider Device
  • 2b and 6b do not allow for peering of L2CP + single service per customer link
  • Additional MEs may be needed at Customer side
customer bridge 1 example without eth link me1

Relay

Customer Bridge 1Example without ETH link ME

Higher Layer Entities

LLC

LLC

LLC

LLC

LLC

LLC

802.1Q Tagging “Y”

802.1Q Tagging “Y”

802.1ag Up CM Shim

802.1ag Up CM Shim

802.1ag Down CM Shim

802.1ag Down CM Shim

MEP

provider bridge 2b example without eth link me1

Relay

Provider Bridge 2bExample without ETH link ME

Higher Layer Entities

LLC

LLC

LLC

LLC

LLC

LLC

MEP

802.1Q Tagging “Y”

802.1Q Tagging “Y”

802.1ag Up CM Shim

802.1ag Up CM Shim

802.1ag Down CM Shim

802.1ag Down CM Shim

MEP

MIP

MIP

slide18

Dual Relay Model

with

Bundling for

Single Integrated Provider Device

slide19

CustomerEquipment

Operator ABridges

Operator BBridges

CustomerEquipment

1

2a

2b

3

4

5

6b

6a

7

11

12

21

22

11

12

C-Tag

21

22

ETH

Untagged

10

S-Tag

20

MEP, MIP, TCP for Dual-Relay Model:Bundling - Single Integrated Provider Device

C-Tag

customer bridge 1 example without eth link me tbd

Relay

MEP

MEP

MEP

MEP

Customer Bridge 1Example without ETH link ME - TBD

Higher Layer Entities

LLC

LLC

LLC

LLC

LLC

LLC

802.1Q Tagging “Y”

802.1Q Tagging “Y”

802.1ag Up CM Shim

802.1ag Up CM Shim

802.1ag Down CM Shim

802.1ag Down CM Shim

provider bridge 2a example without eth link me tbd

Relay

Provider Bridge 2aExample without ETH link ME - TBD

Higher Layer Entities

LLC

LLC

LLC

LLC

LLC

LLC

802.1Q Tagging “Y”

802.1Q Tagging “Y”

802.1ag Up CM Shim

802.1ag Up CM Shim

802.1ag Down CM Shim

802.1ag Down CM Shim

MEP

MEP

MEP

MEP

MIP

MIP

MIP

MIP

provider bridge 2b example without eth link me tbd

Relay

MIP

Provider Bridge 2bExample without ETH link ME - TBD

Higher Layer Entities

LLC

LLC

LLC

LLC

LLC

LLC

802.1Q Tagging “Y”

802.1Q Tagging “Y”

MEP

MEP

802.1ag Up CM Shim

802.1ag Up CM Shim

802.1ag Down CM Shim

802.1ag Down CM Shim

MEP

MEP

MIP

slide23

Dual Relay Model

with

Bundling for

Single Relay as Provider Device

mep mip tcp for dual relay model bundling single relay as provider device

CustomerEquipment

Operator ABridges

Operator BBridges

CustomerEquipment

1

2b

3

4

5

6b

7

11

12

21

22

Untagged

10

S-Tag

20

ETH

MEP, MIP, TCP for Dual-Relay Model:Bundling - Single Relay as Provider Device

C-Tag

slide25

Dual Relay Model

with

All-to-One Bundling for

Single Relay as Provider Device

mep mip tcp for dual relay model all to one bundling

CustomerEquipment

Operator ABridges

Operator BBridges

CustomerEquipment

1

2b

3

4

5

6b

7

11

12

21

22

Untagged

10

S-Tag

ETH

MEP, MIP, TCP for Dual-Relay Model:All-to-One Bundling

C-Tag

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