[rbridge] Avoiding sending multiple IS-IS Hellos tagged with allthe VLAN tags

[James Carlson]

Dinesh G Dutt writes:
> Radia Perlman wrote:
> > I'd like to understand what problem customers are attempting to solve with
> > partitioned VLANs, and what hardship it would present to require at 
> > least one of the
> >   
> The primary problem with having a VLAN everywhere is that the root of 
> the spanning tree moves around leading to non-optimal forwarding in 
> enterprise networks.

That shouldn't matter anymore with RBridges, right?  One of the points
of getting rid of STP is to get rid of the single root and the
disappointing paths created when STP shuts down useful links.

I understand the transition argument, but the idea of VLAN ID reuse
seems hard enough to manage over time that it's harmful.

Should we carry all of STP's baggage?

-- 
James Carlson, Solaris Networking              <james.d.carlson at sun.com>
Sun Microsystems / 1 Network Drive         71.232W   Vox +1 781 442 2084
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