[rbridge] Preview of changes for VLANs, etc.

[Eric Gray]

Radia,

	I have to agree with what Russ says below.  I think 
this has been a part of the issue in previous discussions:
people are trying to see things simply (by pretending that
VLANs can be treated arbritrarily) but have been making it
all much more complicated in doing so.

	Russ' description of VLAN interactions is simple and 
correct.

--
Eric Gray
Principal Engineer
Ericsson  

> -----Original Message-----
> From: rbridge-bounces at postel.org 
> [mailto:rbridge-bounces at postel.org] On Behalf Of Russ White
> Sent: Tuesday, November 06, 2007 7:49 PM
> To: Radia Perlman
> Cc: Developing a hybrid router/bridge.
> Subject: Re: [rbridge] Preview of changes for VLANs, etc.
> 
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> 
> > RBridges, on the other hand, like bridges, are 
> simultaneously supporting
> > multiple VLANs
> > over the same port. VLANs that the RBridge itself is not a 
> member of in
> > any sense -- just
> > that the RBridge is supposed to support to glue it to other 
> pieces of
> > the VLAN in other
> > parts of the campus.
> 
> Again, the only two instances I know of are:
> 
> 1. There are subinterfaces, or physical interfaces, which belong to a
> single vlan.
> 
> 2. The port is declared a trunk, and specific rules apply to the port,
> such as no end user traffic is allowed on the port.
> 
> And I still don't see what any of this has to do with all this
> complexity. I've described all the situations in previous emails, and
> how to handle them, without the concept of a "common vlan," 
> etc. Again,
> why do we need this complexity? What is it supporting? Can 
> someone point
> to a specific situation that wouldn't be handled by the 
> forwarding rules
> I proposed earlier--that's not contrived, and impossible with all
> current implementations?
> 
> :-)
> 
> Russ
> 
> - --
> riw at cisco.com CCIE <>< Grace Alone
> 
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