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Attila Takacs – Ericsson Francesco Fondelli – Ericsson Benoit Tremblay – Ericsson

GMPLS RSVP-TE Recovery Extension for data plane initiated reversion and protection timer signalling draft-takacs-ccamp-revertive-ps-04.txt. Attila Takacs – Ericsson Francesco Fondelli – Ericsson Benoit Tremblay – Ericsson. IETF-77 Anaheim. Background, Motivation and Objectives.

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Attila Takacs – Ericsson Francesco Fondelli – Ericsson Benoit Tremblay – Ericsson

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  1. GMPLS RSVP-TE Recovery Extension for data plane initiated reversion and protection timer signallingdraft-takacs-ccamp-revertive-ps-04.txt Attila Takacs – Ericsson FrancescoFondelli – Ericsson Benoit Tremblay – Ericsson IETF-77 Anaheim

  2. Background, Motivation and Objectives • Currently RSVP-TE extensions do not address the configuration of protection switching timers neither provide information on the protection switching operation mode (i.e., revertive or non- revertive) • Hold-off time (HOFF) [RFC4427] • Time between the reporting of signal fail or degrade, and the initialization of the recovery switching operation • Wait-to-Restore time (WTR) [RFC4427] • Time that must elapse after a recovered fault before an LSP can be used again to transport the normal traffic and/or to select the normal traffic from the LSP • Reversion refers to the process of moving normal traffic back to the original working LSP after the failure is cleared and the path is repaired [RFC4427] • These parameters are important for recovery in any transport network • GMPLS RSVP-TE signaling should be able to carry the necessary information • Also required for MPLS-TP

  3. Proposal • Update Protection Object format (C-Type 2) allowing sub-TLVs • Eases future extensions of the Protection Object 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Length | Class-Num(37) | C-Type(2 IANA)| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |S|P|N|O| Reserved | LSP Flags | Reserved | Link Flags| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |I|R| Reserved | Seg.Flags | Reserved | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | ~ sub-TLVs ~ | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ • Introduce WTR and HOFF sub-TLVs

  4. Next steps • Identified in MPLS-TP Control Plane Framework as needed extension to fulfill TP requirements • draft-abfb-mpls-tp-control-plane-framework-02 • Adopt as WG document or progress the proposal together with other protection extensions

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