Hi
This is a new version of the Ti-lfa draft. The key changes are:
- Added a section 6 that provides statistics on the number of SIDs
needed to protect against link, node, and local SRLG
- Defined the term "topology independent"
- Confirmed near the beginning of Section 3 that the mechanisms in the
document are applicable whether downstream routers have converged or
not, thereby alleviating any need for co-ordination or message exchange
between the PLR and any other router in the network
- At the end of Section 5, we added paragraphs to explain how a PLR is
able to protect SR-policies by inspecting the SID right after the active
SID and determining the correct action accordingly
- Addressed comments that were sent out on the rtgwg mailing list. If
there is anything that is overlooked, we are more than happy to address
and/or correct.
All comments are most welcomed
Ahmed
-------- Forwarded Message --------
Subject: I-D Action: draft-bashandy-rtgwg-segment-routing-ti-lfa-03.txt
Date: Wed, 28 Mar 2018 07:15:14 -0700
From: [email protected]
Reply-To: [email protected]
To: [email protected]
A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Topology Independent Fast Reroute using Segment
Routing
Authors : Ahmed Bashandy
Clarence Filsfils
Bruno Decraene
Stephane Litkowski
Pierre Francois
Daniel Voyer
Filename : draft-bashandy-rtgwg-segment-routing-ti-lfa-03.txt
Pages : 18
Date : 2018-03-28
Abstract:
This document presents Topology Independent Loop-free Alternate Fast
Re-route (TI-LFA), aimed at providing protection of node and
adjacency segments within the Segment Routing (SR) framework. This
Fast Re-route (FRR) behavior builds on proven IP-FRR concepts being
LFAs, remote LFAs (RLFA), and remote LFAs with directed forwarding
(DLFA). It extends these concepts to provide guaranteed coverage in
any IGP network. A key aspect of TI-LFA is the FRR path selection
approach establishing protection over post-convergence paths from
the point of local repair, dramatically reducing the operational
need to control the tie-breaks among various FRR options.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-bashandy-rtgwg-segment-routing-ti-lfa/
There are also htmlized versions available at:
https://tools.ietf.org/html/draft-bashandy-rtgwg-segment-routing-ti-lfa-03
https://datatracker.ietf.org/doc/html/draft-bashandy-rtgwg-segment-routing-ti-lfa-03
A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-bashandy-rtgwg-segment-routing-ti-lfa-03
Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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