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 Optimal Distributed Flooding for Dense
Topologies
Authors : Russ White
Shraddha Hegde
Tony Przygienda
Filename : draft-ietf-lsr-distoptflood-01.txt
Pages : 13
Date : 2023-01-16
Abstract:
In dense topologies (such as data center fabrics based on the Clos
and butterfly topologies, though not limited to those exclusively),
IGP flooding mechanisms designed originally for sparse topologies can
"overflood," or in other words generate too many identical copies of
topology and reachability information arriving at a given node from
other devices. This normally results in slower convergence times and
higher resource utilization to process and discard the superfluous
copies. The modifications to the flooding mechanism in the
Intermediate System to Intermediate System (IS-IS) link state
protocol described in this document reduce resource utilization
significantly, while increaseing convergence performance in dense
topologies. Beside reducing the extraneous copies it uses the dense
topologies to "load-balance" flooding across different possible paths
in the network to prevent build up of flooding hot-spots.
Note that a Clos fabric is used as the primary example of a dense
flooding topology throughout this document. However, the flooding
optimizations described in this document apply to any arbitrary
topology.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-lsr-distoptflood/
There is also an htmlized version available at:
https://datatracker.ietf.org/doc/html/draft-ietf-lsr-distoptflood-01
A diff from the previous version is available at:
https://author-tools.ietf.org/iddiff?url2=draft-ietf-lsr-distoptflood-01
Internet-Drafts are also available by rsync at rsync.ietf.org::internet-drafts
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