A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Source Packet Routing in Networking WG of the
IETF.
Title : Path Segment in MPLS Based Segment Routing Network
Authors : Weiqiang Cheng
Han Li
Mach(Guoyi) Chen
Rakesh Gandhi
Royi Zigler
Filename : draft-ietf-spring-mpls-path-segment-01.txt
Pages : 11
Date : 2019-09-16
Abstract:
A Segment Routing (SR) path is identified by an SR segment list.
Only the full segment list identifies the full end-to-end path, and
one segment or a partial set of segments from the list cannot
identify the SR path and distinguish it from other SR paths that may
be partially congruent. But path identification is a pre-requisite
for various use-cases such as performance measurement (PM) of an SR
path.
In SR for MPLS (SR-MPLS) the segment identifiers are stripped from
the packet through label popping as the packet transits the network.
This means that when a packet reaches the egress of the SR path, it
is not possible to determine on which SR path it traversed the
network.
This document defines a new type of segment that is referred to as
Path Segment, which is used to identify an SR path in an SR-MPLS
network. When used, it is inserted at the ingress node of the SR
path and immediately follows the last segment identifier in the
segment list of the SR path. The Path Segment will not be popped off
until it reaches the egress node of the SR path.
A Path Segment can be used by the egress node to implement path
identification hence to support various use-cases including SR path
PM, end-to-end 1+1 SR path protection, and bidirectional SR paths
correlation.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-spring-mpls-path-segment/
There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-spring-mpls-path-segment-01
https://datatracker.ietf.org/doc/html/draft-ietf-spring-mpls-path-segment-01
A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-spring-mpls-path-segment-01
Please note that it may take a couple of minutes from the time of submission
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