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Status:

PROPOSED STANDARD

Authors:

Y. Shen
R. Aggarwal
W. Henderickx
Y. Jiang

Stream:

IETF

Source:

pals (rtg)

Cite this RFC:TXT  | XML  |  BibTeX

DOI:  https://doi.org/10.17487/RFC8104

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Abstract

This document specifies a fast mechanism for protecting pseudowires(PWs) transported by IP/MPLS tunnels against egress endpointfailures, including egress attachment circuit (AC) failure, egressprovider edge (PE) failure, multi-segment PW terminating PE failure,and multi-segment PW switching PE failure. Operating on the basis ofmultihomed customer edge (CE), redundant PWs, upstream labelassignment, and context-specific label switching, the mechanismenables local repair to be performed by the router upstream adjacentto a failure. The router can restore a PW in the order of tens ofmilliseconds, by rerouting traffic around the failure to a protectorthrough a pre-established bypass tunnel. Therefore, the mechanismcan be used to reduce traffic loss before global repair reacts to thefailure and the network converges on the topology changes due to thefailure.

For the definition ofStatus,seeRFC 2026.

For the definition ofStream, seeRFC 8729.