RSVP-TE Extensions to Notification for Shared Mesh Protection CCAMP WG, IETF 81th draft-he-ccamp-notification-shared-mesh-protection-00 Wenjuan He

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RSVP-TE Extensions to Notification for Shared Mesh Protection CCAMP WG, IETF 81th draft-he-ccamp-notification-shared-mesh-protection-00 Wenjuan He Fei Zhang

Motivation Requirements –R66/67/68/69 [RFC5654][RFC5654] Benefits – Reducing the number of network resources [tp-survive] [tp-survive] Solution gaps –The processing of Shared Mesh Restoration was descried in [RFC4872], but Shared Mesh Protection was not covered.[RFC4872]

Shared Mesh Protection Planning Operator plans the Shared Mesh Protection Group (SMPG) –assign a group ID and a virtual address for the shared mesh protection group. Association Object – Association Type:Resource Sharing –Association Source: SMPG virtual address – Association ID :SMPG group ID Protection Object –Unchanged

Protection Switching Notification 1. Node A/B switch the traffic from working path to protection Data plane Switching [linear-protection][linear-protection] Control Plane Switching [section-7 of RFC4872][section-7 of RFC4872] 2.Node E send notify message to node C with error "notify error/resource occupied by the high priority" or "notify error/resource occupied by the low priority" 3.Node C MAY reroute or lock the protecting LSP.

Reversion 1.Node A switches the traffic to W1 and refreshes the Path message 2.Upon receiving the Path message with the O bit clear, node E will send notify message with new error code/sub-code "notify error/ resource available" to node C 3. Node C May unlock the protection path When the fault of the working LSP disappears:

Resource Preemption A failure occurs on W2 while W1 is still in failure state if P2’s priority is lower; the node C will not switch the traffic if P2’s priority is higher; the above figure indicates the signaling procedure

Next Steps Update RFC4872? Comments/Feedback?