1 / 12

Author list: Rakesh Gandhi (rgandhi@cisco) Zafar Ali ( zali@cisco ) - Presenter

RSVP-TE Extensions For Signaling GMPLS Restoration LSP draft-gandhi-ccamp-gmpls-restoration- lsp-01. Author list: Rakesh Gandhi (rgandhi@cisco.com) Zafar Ali ( zali@cisco.com ) - Presenter Gabriele Maria Galimberti ( ggalimbe@cisco.com )

takara
Download Presentation

Author list: Rakesh Gandhi (rgandhi@cisco) Zafar Ali ( zali@cisco ) - Presenter

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. RSVP-TE Extensions For Signaling GMPLS Restoration LSPdraft-gandhi-ccamp-gmpls-restoration-lsp-01 Author list: Rakesh Gandhi (rgandhi@cisco.com) Zafar Ali (zali@cisco.com) - Presenter Gabriele Maria Galimberti(ggalimbe@cisco.com) Acknowledgment: George Swallow (swallow@cisco.com) 88th IETF, CCAMP WG, Vancouver, BC, Canada (November 2013)

  2. Outline • Requirements and Use Cases • Clarification need and update from last IETF • Clarification Statement • Next Steps

  3. Transport Requirements for Restoration LSP (1+R Use case) Working LSP OXC2 Restore LSP OXC1 • Resources for failed LSP need to be remain intact at least in control plane as: • The LSP follow a nominal path (minimum latency, minimum cost, etc.). • Deterministic behavior after failure is recovered (deterministic SLAs). • Revert operation to the failed resources is desirable. • Restoration LSP is signaled after failure is detected. OXC3 OXC5 Ingress OXC4 GMPLS Network 15454 Egress

  4. Transport Requirements for Restoration LSP (1:1+R, 1+1+R Use cases) Working LSP OXC2 OXC1 • Same Requirements as outlined in previous slide. • Restoration LSP is signaled after failure of working LSP and/ or protect LSP. Restore LSP Protect LSP OXC3 OXC5 Ingress GMPLS Network 15454 Egress OXC4

  5. Agenda • Requirements and Use Cases • Clarification need and update from last IETF • Clarification Statement • Next Steps

  6. Clarification need and update from last IETF • Solution in RFC4872, RFC4873 and RFC6689 assumes working LSP is torn down before restoration LSP is signaled. • This is not the case for 1+R, 1:1+R, 1+1+R Use cases. • We had private discussions with Igor, et al. and agreed on need for this draft. • During last IETF meeting, there was an agreement on the need to clarify usage of association in the context of 1+R, 1:1+R, 1+1+R Use cases.

  7. Agenda • Requirements and Use Cases • Clarification need and update from last IETF • Clarification Statement • Next Steps

  8. Signaling Procedure For 1+R • Working LSP: • PROTECTION object with P = 0 • LSP has ASSOCIATION object with association ID = LSP-ID of itself [RFC6689]. • Restoration LSP: • PROTECTION object with P = 0 • LSP has ASSOCIATION object with association ID = LSP-ID of workingLSP (recall that working is not torn down so LSP-ID of working is valid). • If working LSP is torn down, restoration LSP inherits both PROTECTION and ASSOCIATION object properties from the working LSP [RFC6689]. • Note that RFC6689 states to use association ID = LSP-ID of itself for restoration LSP. We are proposing to modify that in the case of working LSP not torn down to use the LSP-ID of the LSP it is restoring to enable unique identification and resource sharing.

  9. Signaling Procedure For 1+1+R • Working LSP: • PROTECTION object with P = 0 • LSP has ASSOCIATION object with association ID = LSP-ID of protect LSP (LSP_ID of itself when Protect is not UP) [RFC6689]. • Protect LSP: • PROTECTION object with P = 1 • LSP has ASSOCIATION object with association ID = LSP-ID of working LSP [RFC6689]. • Restoration LSP for working: • PROTECTION object with P = 0 • LSP has ASSOCIATION object with association ID = LSP-ID of working LSP. • Restoration LSP for protect: • PROTECTION object with P = 1 • LSP has ASSOCIATION object with association ID = LSP-ID of protect LSP. • If working [protect] LSP is torn down, restoration LSP inherits both PROTECTION and ASSOCIATION object properties from the working [protect] LSP [RFC6689].

  10. Agenda • Requirements and Use Cases • Changes From Revision-00 • Solution • Next Steps

  11. Next Steps • We would like to make this draft a WG Document.

  12. Thank You.

More Related