[rbridge] RBridge: a case of study

[James Carlson]

Eric Gray writes:
> Donald,
> 
> 	When you say "would all have the same Outer [VID]"
> - do you mean:
> 
> 1) all frames MUST have the same VID within the an RBridge 
>    campus, 
> 2) all frames forwarded from a (physical) port on one RBridge 
>    to a (physical) port on another RBridge MUST have the same
>    VID, or 
> 3) something else?

(I'm not Donald, but ...)

My understanding was more like:

  3) Where an outer VLAN tag is present, all frames transmitted by an
     RBridge must have the same inner and outer VLAN tag numbers.
     Where an outer VLAN tag is not present, the implicit tag for that
     port must match or be compatible with the inner tag.

... which would be consistent with "traditional" bridge behavior and
would effectively rule out the type of solution that Silvano Gai has
been proposing.

The distinction with (2) in your list is that (2) appears to rule out
the use of so-called "tagged" or leaf or ingress ports, forcing all
ports to carry VLAN tags.

-- 
James Carlson, Solaris Networking              <james.d.carlson at sun.com>
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