Mpls tp p2mp shared protection draft liu mpls tp p2mp shared protection 01
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MPLS-TP P2MP shared Protection draft-liu-mpls-tp-p2mp-shared-protection-01. Guoman Liu ( [email protected] ) ) Yuefeng Ji ( [email protected] ) Jian Yang( [email protected] ) Jinghai Yu( [email protected] ) Zongpeng Du( [email protected] ) 80 th IETF Meeting in Prague.

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MPLS-TP P2MP shared Protection draft-liu-mpls-tp-p2mp-shared-protection-01

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Mpls tp p2mp shared protection draft liu mpls tp p2mp shared protection 01

MPLS-TP P2MP shared Protectiondraft-liu-mpls-tp-p2mp-shared-protection-01

Guoman Liu ([email protected] ) )

Yuefeng Ji([email protected])

Jian Yang([email protected])

Jinghai Yu([email protected])

Zongpeng Du([email protected] )

80th IETF Meeting in Prague


Motivation

Motivation

  • Requirements from RFC5654

    • Req.67B : MPLS-TP MUST support unidirectional 1:N protection for P2MP

    • Req.69: MPLS-TP MUST support sharing of protection resources

  • Purpose of this draft

    • This draft provides two shared protection solutions to fulfill the two requirements. But the protection of ingress and egress node failure is not in the scope of the document.


Solution 1

Solution 1

1

P2MP

Path1

  • Two working p2mp path

    • path 1: Root=A, Leaf=1,2,3

    • path 2: Root=C, Leaf=3,4,5

  • One protecting p2mp path

    • protecting path: Root=B, Leaf=1,2,3,4,5

A

2

CE1

3

Protection

path

Broadcast traffic

B

4

CE2

P2MP

path2

C

5


Failure notification

Failure notification

Failure Notify Message

1

1 Leaf node 1 will detect a defect on the branch path(A-1)and send Failure Notify message to Root node A .

2 Node A will send switch requirement message to node B by control channel. 3 B will select one defective working path to be protected based on the priority;

4 node B will send replying message to root nodes of all defective working path ,so that they can know which working path will be protected.

P2MP

path1

A

2

CE1

3

Protection

path

Broadcast traffic

B

4

CE2

P2MP

path2

C

5


Protect switching

Protect Switching

1

P2MP

path1

A

2

  • 1 Node B sends extensive APS or PSC message to all leaf nodes of the protecting p2mp path, it indicates which service will be transported by the protecting path.

  • 2 As the working path 1 is selected to be protected, node B begins to send service packet of working path 1 by the protecting p2mp path. leaf node 1,2,3 will receive and process these packets , but Leaf node 4 and 5 will drop the packets received from the protecting p2mp path

CE1

3

Protection

path

Broadcast traffic

B

4

CE2

P2MP

path2

C

5


Solution 2

Solution 2

1

P2MP

path1

  • Two working p2mp path

    • path 1: Root=A, leaf=1,2,3;

    • path 2: Root=C, Leaf=3,4,5 ;

  • Five protecting P2P Tunnels: B-1, B-2, B-3, B-4, B-5

A

2

CE1

3

Broadcast traffic

B

4

CE2

P2MP

path2

C

5


Failure notification1

Failure Notification

1

P2MP

path1

A

2

when leaf node 3 detects a defect on the branch path(A-3) .Leaf Node 3 would select one path to be protected based on the priority, then switch to the protecting path to receive the service packet and send extensive APS or PSC message including the selected defective working path ID to source protection node B by p2p tunnel;

CE1

APS or PSC

3

Broadcast traffic

B

4

CE2

P2MP

path2

C

5


Protect switching1

Protect Switching

1

P2MP

path1

when Node B received the extensive APS or PSC Message,it will send the service packet of selected protected working path by p2p protecting Tunnel(B-3) . For other leaf node 1 and 2 still receive service packet from working path 1

A

2

CE1

3

Broadcast traffic

B

4

CE2

P2MP

path2

C

5


Next step

Next step

Update this document according to comments of this meeting and Mailing list.


Mpls tp p2mp shared protection draft liu mpls tp p2mp shared protection 01

Comments and questions?

Thank you!


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