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Zafar Ali (zali@cisco) Jean Philippe Vasseur (jpv@cisco) Anca Zamfir (ancaz@cisco)

Graceful Shutdown in MPLS Traffic Engineering Networks draft-ali-ccamp-mpls-graceful-shutdown-02.txt. Zafar Ali (zali@cisco.com) Jean Philippe Vasseur (jpv@cisco.com) Anca Zamfir (ancaz@cisco.com). IETF May Fall in Love with Canada!.

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Zafar Ali (zali@cisco) Jean Philippe Vasseur (jpv@cisco) Anca Zamfir (ancaz@cisco)

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  1. Graceful Shutdown in MPLS Traffic Engineering Networksdraft-ali-ccamp-mpls-graceful-shutdown-02.txt Zafar Ali (zali@cisco.com) Jean Philippe Vasseur (jpv@cisco.com) Anca Zamfir (ancaz@cisco.com) 64th IETF Vancouver Nov. 2005

  2. IETF May Fall in Love with Canada! • Canada has places that are colder than Minnesota, i.e., Ideal Venue for Winter ;-) • IETF in Canada can still be counted as outside-US conference event, Eh ;-) • Joke aside, Welcome to Canada (Bienvenue). • I could like to thank IETF for having this conference in Canada [It’s good to travel without Passport, for a change ;-) ].

  3. History of the Draft • It was first presented at IETF 60 in August 2004. • There is a general agreement on the requirements. • We need to close on the Signaling Solution (discussion focus for today).

  4. Desired Attributes of the Signaling Solution • As the Ingress LSR is expected to perform make-before-break for the LSP (using the resource that is being shutdown), we should be able to specify the TE resource (link/ node) under graceful shutdown. • Conveying signaling message to the Ingress LSR suffices. I.e., we should be able to make use of the Notify Message. • As use of the Notify Message is optional, we should also be able to make use of PathErr message.

  5. Comparing on-the-table Signaling Solutions

  6. Proposed Solution • We propose to overload “TE link maintenance required” sub-code of the Notify Error Code (24) of the ERROR_SPEC. • The ERROR_SPEC with code 24/ sub-code TBD can then be carried in either PathErr or Notify message to signal GS condition. • The Ingress LSR is expected to perform make-before-break for the LSP (using resources that are being shutdown). • The IGP based solution is also based on an existing framework. Proposed changes are minor and straight forward and are based on an existing framework.

  7. Next Steps • There is a general agreement on the requirements. • The Work in within the Scope of CCAMP. • We have addressed all existing comments on this draft (except some off-line comments from Dimitri on Version 2). • We would like to request WG to accept this ID as a WG document.

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