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Authors: Zafar Ali ( zali@cisco ) George Swallow (swallow@cisco )

Extensions to RSVP- TE for Error Notification in GMPLS UNI draft-ali-ccamp-gmpls-uni-error-notification-00.txt. Authors: Zafar Ali ( zali@cisco.com ) George Swallow (swallow@cisco.com ) Clarence Filsfils ( cfilsfil@cisco.com ) Matt Hartley ( mhartley@cisco.com ) - Presenter

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Authors: Zafar Ali ( zali@cisco ) George Swallow (swallow@cisco )

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  1. Extensions to RSVP-TEfor Error Notification in GMPLS UNIdraft-ali-ccamp-gmpls-uni-error-notification-00.txt Authors: Zafar Ali (zali@cisco.com) George Swallow (swallow@cisco.com) Clarence Filsfils (cfilsfil@cisco.com) Matt Hartley (mhartley@cisco.com) - Presenter Kenji Kumaki (ke-kumaki@kddi.com) 87th IETF, CCAMP WG, Berlin, Germany (July-August 2013)

  2. Outline • Problem Statement • Solution • Next Steps

  3. Reference Network EN: Edge Node CN: Core Node Core Network Egress Ingress CN2 CN1 CN3 EN1 EN2 CN5 CN4 EN4 EN3 Link failure GMPLS-UNI LSP

  4. Problems • Error notification: Edge nodes have no visibility into core topology • Failed link address is unknown to them • Core’s policy may be to hide addresses and topology • Recovery of GMPLS-UNI LSP after failure • Repair within optical network • Re-setup from ingress node • How do we coordinate the two? • These issues apply to GMPLS-UNI, and therefore fall within CCAMP’s charter.

  5. Solutions • Allow a node to change the address in a Path-Err message • New flag to indicate that this has been done • New PathErr to allow core to inform edge that LSP repair has occurred

  6. Error signaling Egress Ingress CN2 CN1 CN3 EN1 EN2 Perr: address: <CN2> Perr: address: <CN1> “Address-changed” flag set Internal core topology hidden from EN

  7. Repair mechanisms Core network repair Orginal LSP Re-signaled Egress Ingress CN2 CN1 CN3 EN1 EN2 CN5 CN4 EN4 EN3 Either mechanism may be preferable; both together may not be.

  8. Repair mechanisms Path-error allows notification of repair by core network Original LSP Core network repair Egress Ingress CN2 CN1 CN3 EN1 EN2 Path-Err: notify / LSP restored CN5 CN4 EN4 EN3 Original LSP signaled with protection requested: Protection Object, LSP flags 0x01 (full rerouting)

  9. Next Steps • This is the first presentation of this draft • We would like to move the draft towards WG adoption

  10. Thank You.

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