On Wed, 21 Mar 2007, Harald Tveit Alvestrand wrote:
--On 20. mars 2007 09:35 -0700 Silvano Gai <sgai(_at_)nuovasystems(_dot_)com>
wrote:
5) Introduction - Bridging limitation. The first paragraph refers to
Ethernet networks used without Spanning Tree. This is irrelevant, since
Spanning Tree is always deployed in conjunction with Ethernet. The
correct contrast must be between Ethernet with Spanning Tree and
Ethernet with TRILL. The claim of a single broadcast/flooding domain is
incorrect since VLANs have solved this issue many years ago.
"always" is too strong, since most unmanaged bridges (intended for consumers'
home networks, but often dangled off the edge of corporate networks as port
expanders, without asking for permission) don't seem to be supporting
Spanning Tree. However, these are not going to support TRILL either, so for
the environments considered here, "always" is probably true.
FWIW, not sure if it matters, but our offices have a relatively
small Ethernet network (50+ switches) and we have specifically
disabled STP.
You can't run STP on host ports, and it's too much of a hassle to
enable it on inter-switch ports, so it's easier to disable it
everywhere.
--
Pekka Savola "You each name yourselves king, yet the
Netcore Oy kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings
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