Hi Cheng,
Some comments after reading v-09.
Section 3
To identify an SRv6 path, this document defines a new segment called SRv6 Path
Segment. An SRv6 Path Segment will not be used for routing so it should not be
copied to the IPv6 destination address.
[Yao]The word "will" is kind of ambiguous, is it a "SHOULD" / "MUST"?
Section 5
A Path Segment is a local segment allocated by an egress node. A Path Segment
can be allocated through several ways, such as CLI, BGP
[I-D.ietf-idr-sr-policy-path-segment], PCEP [I-D.ietf-pce-sr-path-segment] or
other ways.
[Yao] Besides allocating the path segment by the egress, from my reading of
draft-ietf-pce-sr-path-segment section 5.2.2.1 , path segment can also be
allocate by the controller. And as described in section 3.1, besides as the
local segment, the path segment can be a Global ID. So "A Path Segment is a
local segment allocated by an egress node." is not accurate.
Section 6
When an SRv6 Path Segment is inserted, the SL MUST be initiated to be less than
the value of Last Entry, and will not point to SRv6 Path Segment.
[Yao] Is the SRv6 Path Segment MUST be inserted by the headend node of an SR
policy? It would be helpful to add some rules/recommendations on inserting the
path segment.
Thanks,
Yao
Original
From: ChengLi <c.l=40huawei....@dmarc.ietf.org>
To: spring@ietf.org <spring@ietf.org>;
Cc: draft-ietf-spring-srv6-path-segm...@ietf.org
<draft-ietf-spring-srv6-path-segm...@ietf.org>;
Date: 2024年09月02日 23:46
Subject: [spring] Request for MORE reviews of
draft-ietf-spring-srv6-path-segment-09
Hi SPRING,
The SR-MPLS Path Segment draft has been published as RFC9545, and we think the
content of SRv6 Path Segment draft is quite stable and mature, so we hope to
see more tech reviews on it so that we can move the draft forward.
The draft is quite simple and straightforward, and it defines a new type of
segment called Path Segment, which is useful to identify an SRv6 path, similar
to SR-MPLS path segment.
The draft only defines the location that the SRv6 Path Segment should appear,
the possible general formats of it, and the general handling of Path Segment.
How to allocate the value to a Path Segment is out of the scope of this draft
and should be defined as per use cases.
An SRv6 Path Segment will not be used for routing so it should not be copied to
the IPv6 destination address.
Many thanks for Adrian, Stefano and Zafar for their useful comments and help on
this draft. More reviews and comments are welcome!
Thanks,
Cheng
-----Original Message-----
From: internet-dra...@ietf.org <internet-dra...@ietf.org>
Sent: Monday, September 2, 2024 5:15 PM
To: i-d-annou...@ietf.org
Cc: spring@ietf.org
Subject: [spring] I-D Action: draft-ietf-spring-srv6-path-segment-09.txt
Internet-Draft draft-ietf-spring-srv6-path-segment-09.txt is now available. It
is a work item of the Source Packet Routing in Networking (SPRING) WG of the
IETF.
Title: Path Segment for SRv6 (Segment Routing in IPv6)
Authors: Cheng Li
Weiqiang Cheng
Mach(Guoyi) Chen
Dhruv Dhody
Yongqing Zhu
Name: draft-ietf-spring-srv6-path-segment-09.txt
Pages: 13
Dates: 2024-09-02
Abstract:
Segment Routing (SR) allows for a flexible definition of end-to-end
paths by encoding an ordered list of instructions, called "segments".
The SR architecture can be implemented over an MPLS data plane as
well as an IPv6 data plane.
Currently, Path Segment has been defined to identify an SR path in
SR-MPLS networks, and is used for various use-cases such as end-to-
end SR Path Protection and Performance Measurement (PM) of an SR
path. This document defines the Path Segment to identify an SRv6
path in an IPv6 network.
The IETF datatracker status page for this Internet-Draft is:
https://datatracker.ietf.org/doc/draft-ietf-spring-srv6-path-segment/
There is also an HTMLized version available at:
https://datatracker.ietf.org/doc/html/draft-ietf-spring-srv6-path-segment-09
A diff from the previous version is available at:
https://author-tools.ietf.org/iddiff?url2=draft-ietf-spring-srv6-path-segment-09
Internet-Drafts are also available by rsync at:
rsync.ietf.org::internet-drafts
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