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RFC 8104
Title: Pseudowire (PW) Endpoint Fast Failure
Protection
Author: Y. Shen, R. Aggarwal,
W. Henderickx, Y. Jiang
Status: Standards Track
Stream: IETF
Date: March 2017
Mailbox: [email protected],
[email protected],
[email protected],
[email protected]
Pages: 43
Characters: 94878
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-ietf-pals-endpoint-fast-protection-05.txt
URL: https://www.rfc-editor.org/info/rfc8104
DOI: 10.17487/RFC8104
This document specifies a fast mechanism for protecting pseudowires
(PWs) transported by IP/MPLS tunnels against egress endpoint
failures, including egress attachment circuit (AC) failure, egress
provider edge (PE) failure, multi-segment PW terminating PE failure,
and multi-segment PW switching PE failure. Operating on the basis of
multihomed customer edge (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.
This document is a product of the Pseudowire And LDP-enabled Services Working
Group of the IETF.
This is now a Proposed Standard.
STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements. Please refer to the current edition of the Official
Internet Protocol Standards (https://www.rfc-editor.org/standards) for the
standardization state and status of this protocol. Distribution of this
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