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-04.txt
Pages : 13
Date : 2021-04-11
Abstract:
A Segment Routing (SR) path is identified by an SR segment list.
Only the complete segment list can identify the end-to-end SR path,
and a sub-set of segments from the segment list cannot distinguish
one SR path from another as they may be partially congruent. SR path
identification is a pre-requisite for various use-cases such as
Performance Measurement (PM), bidirectional paths correlation, and
end-to-end 1+1 path protection.
In SR for MPLS data plane (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 by 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. The Path Segment
then can be used by the egress node to implement SR path
identification and 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-04
https://datatracker.ietf.org/doc/html/draft-ietf-spring-mpls-path-segment-04
A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-spring-mpls-path-segment-04
Please note that it may take a couple of minutes from the time of submission
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