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draft-rahman-ccamp-rsvp-restart-extensions-00

draft-rahman-ccamp-rsvp-restart-extensions-00. Reshad Rahman rrahman@cisco.com Anca Zamfir ancaz@cisco.com Junaid Israr jisrar@cisco.com. Summary. Extensions to RSVP-TE GR as specified in RFC3473. Addresses recovery of ERO after restart: At ingress nodes. At transit nodes.

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draft-rahman-ccamp-rsvp-restart-extensions-00

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  1. draft-rahman-ccamp-rsvp-restart-extensions-00 Reshad Rahman rrahman@cisco.com Anca Zamfir ancaz@cisco.com Junaid Israr jisrar@cisco.com 59th IETF Seoul March 2004

  2. Summary • Extensions to RSVP-TE GR as specified in RFC3473. • Addresses recovery of ERO after restart: • At ingress nodes. • At transit nodes. • Proposes a mechanism to detect multiple restarts. • Presented at MPLS WG at IETF 58. 59th IETF Seoul March 2004

  3. Feedback • There have been some discussions on the mailing list to see if we can use RRO instead of defining a new object. 59th IETF Seoul March 2004

  4. Next Actions • draft-aruns-ccamp-rsvp-restart-ext-00.txt proposes a mechanism to recover full signaling state. • The drafts will be merged. 59th IETF Seoul March 2004

  5. ERO Recovery R5 R1 R6 R3 R2 [R2, R6(loose)] [R6] [R3, R4, R5, R6] • After R2 restarts, it receives the Path message with ERO [R2, R6(loose)] from R1 and R2 sends a Path message to R3 with Recovery ERO [R3, R6]. • R3 finds the associated Path state and replies with a Resv message containing Recovery ERO [R3, R4, R5, R6]. • R2 uses the Resv’s Recovery ERO to update its Path ERO. Subsequent Path messages from R2 are sent with ERO [R3, R4, R5, R6]. [R2, R6(loose)] Rec ERO [R3, R6] Rec ERO [R3, R4, R5, R6] [R5, R6] [R4, R5, R6] R4 59th IETF Seoul March 2004

  6. Detecting Multiple Restarts • Each node sends a non-zero Recovery Time while in recovery mode and must set it to zero once its recovery is complete. This allows a restarting node to detect that its downstream neighbor also restarted: it sends a Recovery Label instead of a Suggested Label. 59th IETF Seoul March 2004

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