The IESG has approved the following document: - 'PW Endpoint Fast Failure Protection' (draft-ietf-pals-endpoint-fast-protection-05.txt) as Proposed Standard This document is the product of the Pseudowire And LDP-enabled Services Working Group. The IESG contact persons are Alvaro Retana, Alia Atlas and Deborah Brungard. A URL of this Internet Draft is: https://datatracker.ietf.org/doc/draft-ietf-pals-endpoint-fast-protection/ Technical Summary This document specifies a fast mechanism for protecting pseudowires 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. Operating on the basis of multi-homed CE, redundant PWs, upstream label assignment and context specific label switching, the mechanism enables local repair to be performed by the router upstream adjacent to a failure. The router can restore a PW in the order of tens of milliseconds, by rerouting traffic around the failure to a protector through a pre-established bypass tunnel. Therefore, the mechanism can be used to reduce traffic loss before global repair reacts to the failure and the network converges on the topology changes due to the failure. Working Group Summary This has been reviewed by the WG and there is nothing contentious in it. There have been a number of attempts at designing a more general solution in the MPLS WG, but none have reached this level of maturity, and it is therefore appropriate to publish this pseudowire specific solution. Document Quality This is a well written document. I do not anticipate any interworking issues between independent implementations. Personnel Who is the Document Shepherd for this document? Stewart Bryant Who is the Responsible Area Director? Deborah Brungard
