PW Endpoint Fast Failure Protection

Document Type Replaced Internet-Draft (individual)
Authors Yimin Shen  , Rahul Aggarwal  , Wim Henderickx 
Last updated 2014-01-02 (latest revision 2013-07-01)
Replaced by draft-ietf-pwe3-endpoint-fast-protection
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document specifies a fast mechanism for protecting pseudowires (PWs) against egress endpoint failures, including egress attachment circuit failure, egress PE failure, multi-segment PW terminating PE failure, and multi-segment PW switching PE failure. Designed on the basis of multi-homed CE, PW redundancy, upstream label assignment and context specific label switching, the mechanism enables local repair to be performed by a router upstream adjacent to a failure. In particular, the router can restore PW traffic in the order of tens of milliseconds, by transmitting the traffic to a protector through a pre-established bypass tunnel. Therefore, the mechanism can reduce traffic loss before global repair reacts to the failure and the network converges on the topology changes due to the failure.


Yimin Shen (
Rahul Aggarwal (
Wim Henderickx (

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