Document Type Replaced Internet-Draft (individual)
Authors Pierre Francois  , Ahmed Bashandy  , Clarence Filsfils  , Bruno Decraene  , Stephane Litkowski 
Last updated 2016-12-09
Replaced by draft-bashandy-rtgwg-segment-routing-ti-lfa
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document presents Topology Independent Loop-free Alternate Fast Re-route (TI-LFA), aimed at providing protection of node and adjacency segments within the Segment Routing (SR) framework. This Fast Re-route (FRR) behavior builds on proven IP-FRR concepts being LFAs, remote LFAs (RLFA), and remote LFAs with directed forwarding (DLFA). It extends these concepts to provide guaranteed coverage in any IGP network. A key aspect of TI-LFA is the FRR path selection approach establishing protection over post-convergence paths from the point of local repair, dramatically reducing the operational need to control the tie-breaks among various FRR options.


Pierre Francois (pfrpfr@gmail.com)
Ahmed Bashandy (bashandy@cisco.com)
Clarence Filsfils (cfilsfil@cisco.com)
Bruno Decraene (bruno.decraene@orange.com)
Stephane Litkowski (stephane.litkowski@orange.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)