[rbridge] RBridge: a case of study

[James Carlson]

Silvano Gai writes:
> Radia,
> 
> I have added few slides to the example and I suggest that we use it as a
> possible case of study for TRILL (of course, not the only one).
> 
> Let's see if the solutions we have discussed work on this example.
> 
> The complete case of study is at:
> 
> http://www.ip6.com/acme-example-v1.ppt

I have a few narrow questions that I think might help me understand
this picture a bit better.  (I probably have more questions once I
know the narrow answers.  ;-})

  1.  After the proposed fix, should VLAN 3 on Cloud L be bridged
      together with VLAN 3 on Cloud R, even though the backbone itself
      doesn't directly carry VLAN 3?  (I.e., are TRILL packets with
      outer VLAN ID 7 or 8 and with inner VLAN 3 present on the
      backbone?)

  2.  What happened to the routing that once went on?  It was
      previously possible to route between these VLANs, but in the new
      diagram, it's not.  Is routing between these networks
      unimportant, or does it take place elsewhere, or must RBridges
      both bridge and route in this scenario?

  3.  Suppose we were to configure VLAN 7 within Cloud L.  Would you
      expect H1 to be able to access nodes within the backbone Cloud G
      at that point?  (I'm trying to figure out whether the "X" and
      "Y" interfaces are of fundamentally different types or if the
      RBridges are just bridges.  I suspect they're different.)

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