[rbridge] Tie breaking in trees
james.d.carlson at sun.com
Thu Jun 11 05:30:45 PDT 2009
Anoop Ghanwani writes:
> Likewise, since we compute a tree for multicast, it
> would make sense to only allow one of those.
Yep; that's what has to happen.
> If someone really wants to have the multiple links
> active, then they can use link aggregation.
The only significant problem with that assertion is that it assumes
that the links are of a sort that can be aggregated. I know that the
initial deployments (ours included) will all be TRILL-over-Ethernet,
but I do think it's a bad idea to assume that this will _always_ be
true. Protocols (good ones at least) tend to have long lives, and
need to adapt.
(A minor problem is that handling aggregation by LACP is a pain. It
requires manual configuration and maintenance. If we detect and
handle aggregates appropriately in TRILL, then that's one more selling
point for RBridges over regular bridges: you just wire them up, and
they work. No questions asked.)
James Carlson, Solaris Networking <james.d.carlson at sun.com>
Sun Microsystems / 35 Network Drive 71.232W Vox +1 781 442 2084
MS UBUR02-212 / Burlington MA 01803-2757 42.496N Fax +1 781 442 1677
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