Dear all in the LSR WG,
In the rtgwg draft named "draft-ietf-rtgwg-srv6-egress-protection", some
parts(the Mirror SID information) are related to the link state packet of
IGP. Kindly have experts review and provide your comments,thank you.
The draft link as below:
Name: draft-ietf-rtgwg-srv6-egress-protection
Revision: 23
Title: SRv6 Path Egress Protection
Date: 2026-04-09
Group: rtgwg
Pages: 24
URL:
https://www.ietf.org/archive/id/draft-ietf-rtgwg-srv6-egress-protection-23.txt
Status:
https://datatracker.ietf.org/doc/draft-ietf-rtgwg-srv6-egress-protection/
HTML:
https://www.ietf.org/archive/id/draft-ietf-rtgwg-srv6-egress-protection-23.html
HTMLized:
https://datatracker.ietf.org/doc/html/draft-ietf-rtgwg-srv6-egress-protection
Diff:
https://author-tools.ietf.org/iddiff?url2=draft-ietf-rtgwg-srv6-egress-protection-23
Best Regards！
Tao He
===============================================
Tao He
Next Generation Internet Research Department
Research Institute
CHINA UNITED NETWORK COMMUNICATIONS CORPORATION LIMITED
Mobile: +86-18618484923
E-mail: [email protected]
From: internet-drafts
Date: 2026-04-09 15:38
To: Chang Cao; Huaimo Chen; Mehmet Toy; Tao He; Zhibo Hu
Subject: New Version Notification for
draft-ietf-rtgwg-srv6-egress-protection-23.txt
【本邮件为外部邮件，请注意核实发件人身份，并谨慎处理邮件内容中的链接及附件】
A new version of Internet-Draft draft-ietf-rtgwg-srv6-egress-protection-23.txt
has been successfully submitted by Tao He and posted to the
IETF repository.
Name: draft-ietf-rtgwg-srv6-egress-protection
Revision: 23
Title: SRv6 Path Egress Protection
Date: 2026-04-09
Group: rtgwg
Pages: 24
URL:
https://www.ietf.org/archive/id/draft-ietf-rtgwg-srv6-egress-protection-23.txt
Status:
https://datatracker.ietf.org/doc/draft-ietf-rtgwg-srv6-egress-protection/
HTML:
https://www.ietf.org/archive/id/draft-ietf-rtgwg-srv6-egress-protection-23.html
HTMLized:
https://datatracker.ietf.org/doc/html/draft-ietf-rtgwg-srv6-egress-protection
Diff:
https://author-tools.ietf.org/iddiff?url2=draft-ietf-rtgwg-srv6-egress-protection-23
Abstract:
TI-LFA specifies fast protections for transit nodes and links of an
SR path. However, it does not present any fast protections for the
egress node of the SR path. This document describes protocol
extensions for fast protecting the egress node and link of a Segment
Routing for IPv6 (SRv6) path. The solution uses IGP extensions and a
Mirror SID (End.M) behavior to steer traffic to a protector egress
upon failure of the primary egress.
This document operates within a single link-state IGP area/level and
uses IS-IS/OSPFv3 to advertise a Mirror SID and the protected
locators for egress node/link protection. While the mechanism can
protect traffic whose active segment at the egress is a Service SID
(e.g., VPN SID), it is not suitable for large-scale deployments with
a high cardinality of VPN/service instances or random multi-homing
patterns, because the amount of egress-protection information to be
flooded in the IGP increases and may impact convergence and control-
plane load.
The IETF Secretariat
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