A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Flexible Multilevel TRILL (Transparent Interconnection of Lots of Links)
Authors : Radia Perlman
Donald Eastlake
Anoop Ghanwani
Hongjun Zhai
Filename : draft-perlman-trill-rbridge-multilevel-08.txt
Pages : 28
Date : 2014-06-30
Abstract:
Extending TRILL to multiple levels has one challenge that is not
addressed by the already-existing capability of IS-IS to have
multiple levels. The issue is with TRILL switch nicknames. There
have been two proposed approaches. One approach, which we refer to
as the "unique nickname" approach, gives unique nicknames to all the
TRILL switches in the multilevel campus, either by having the
level-1/level-2 border TRILL switches advertise which nicknames are
not available for assignment in the area, or by partitioning the
16-bit nickname into an "area" field and a "nickname inside the area"
field. The other approach, which we refer to as the "aggregated
nickname" approach, involves assigning nicknames to the areas, and
allowing nicknames to be reused in different areas, by having the
border TRILL switches rewrite the nickname fields when entering or
leaving an area. Each of those approaches has advantages and
disadvantages. The design in this document allows a choice of
approach in each area, allowing the simplicity of the unique nickname
approach in installations in which there is no danger of running out
of nicknames, and allowing nickname rewriting to be phased into
larger installations on a per-area basis.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-perlman-trill-rbridge-multilevel/
There's also a htmlized version available at:
http://tools.ietf.org/html/draft-perlman-trill-rbridge-multilevel-08
A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=draft-perlman-trill-rbridge-multilevel-08
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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