A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Link State Routing WG of the IETF.
Title : IS-IS Flood Reflection
Authors : Tony Przygienda
Chris Bowers
Yiu Lee
Alankar Sharma
Russ White
Filename : draft-ietf-lsr-isis-flood-reflection-08.txt
Pages : 22
Date : 2022-09-20
Abstract:
This document describes a backwards compatible, optional IS-IS
extension that allows the creation of IS-IS flood reflection
topologies. Flood reflection permits topologies in which L1 areas
provide transit forwarding for L2 using all available L1 nodes
internally. It accomplishes this by creating L2 flood reflection
adjacencies within each L1 area. Those adjacencies are used to flood
L2 LSPDUs and are used in the L2 SPF computation. However, they are
not utilized for forwarding within the flood reflection cluster
except in pathological cases mentioned in Section 7. This
arrangement gives the L2 topology significantly better scaling
properties than traditionally used flat designs. As an additional
benefit, only those routers directly participating in flood
reflection are required to support the feature. This allows for
incremental deployment of scalable L1 transit areas in an existing,
previously flat network design, without the necessity of upgrading
all routers in the network.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-lsr-isis-flood-reflection/
There is also an HTML version available at:
https://www.ietf.org/archive/id/draft-ietf-lsr-isis-flood-reflection-08.html
A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-lsr-isis-flood-reflection-08
Internet-Drafts are also available by rsync at rsync.ietf.org::internet-drafts
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