This revision just has some minor changes related to updating references to other drafts.
Thanks, Donald =============================== Donald E. Eastlake 3rd +1-508-333-2270 (cell) 155 Beaver Street, Milford, MA 01757 USA [email protected] On Sun, Aug 28, 2016 at 10:17 AM, <[email protected]> wrote: > > A New Internet-Draft is available from the on-line Internet-Drafts > directories. > This draft is a work item of the Transparent Interconnection of Lots of > Links of the IETF. > > Title : Alternatives for Multilevel TRILL (Transparent > Interconnection of Lots of Links) > Authors : Radia Perlman > Donald Eastlake > Mingui Zhang > Anoop Ghanwani > Hongjun Zhai > Filename : draft-ietf-trill-rbridge-multilevel-04.txt > Pages : 31 > Date : 2016-08-28 > > Abstract: > Extending TRILL to multiple levels has challenges that are not > addressed by the already-existing capability of IS-IS to have > multiple levels. One issue is with the handling of multi-destination > packet distribution trees. Another 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 hiding the nicknames within > areas, 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. > > This informational document suggests allowing a choice of approach in > each area. This allows the simplicity of the unique nickname approach > in installations in which there is no danger of running out of > nicknames and allows the complexity of hiding the nicknames in an > area 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-ietf-trill-rbridge-multilevel/ > > There's also a htmlized version available at: > https://tools.ietf.org/html/draft-ietf-trill-rbridge-multilevel-04 > > A diff from the previous version is available at: > https://www.ietf.org/rfcdiff?url2=draft-ietf-trill-rbridge-multilevel-04 > > > 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/ > > _______________________________________________ > trill mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/trill >
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