Fast Reroute for Node Protection in LDP- based LSPs

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Presentation transcript:

Fast Reroute for Node Protection in LDP- based LSPs draft-esale-mpls-ldp-node-frr-05 Fast Reroute for Node Protection in LDP- based LSPs IETF 98, Chicago (presented by Kireeti Kompella) Authors - Santosh Esale, Raveendra Torvi, Luyuan Fang, Luay Jalil

Key Highlights Fast Re-route for LDP-signaled transport LSPs Local protection to minimize connectivity disruption Link and node protection for LDP based transport LSPs using RSVP-TE bypasses No restrictions on the network topology – provide topology independent local protection so long as there is alternate path in the network that avoids the protected node

Key Highlights Additional provisioning and configuration required could be fairly small Depends on implementation - however it could be as minimal as single line bypass LSPs from PLR to MPT and Targeted LDP between PLR and MPT can be established automatically Relies on the existing IETF standards RSVP-TE for establishing bypass LSPs Targeted LDP to obtain label mapping from MPT Needed only for node protection Synergy with link and node protection for mLDP-signaled LSPs

Does it apply to SR? Yes and No The main purpose of the solution is to provide topology independent local protection using RSVP-TE in LDP based MPLS networks Link protection is already deployed using manually configured RSVP-TE one-hop LSPs This draft addresses node protection It can also be used to protect SR node segments to keep the SR label stack depth small, especially for node segments

References to earlier work We studied existing work on this topic including RFC6981, RFC5715, draft-shen-mpls-ldp-nnhop-label etc We believe that the procedures described in this document are unique and simple We will add few more references in the next revision More suggestions? Speak out or write to us

Next Steps Version 05 addresses all the comments that we have received so far The draft is stable for a year now Therefore, the authors would like to request a working group adoption of the draft, either in the MPLS WG or in RTGWG