[rbridge] Range of appllicability (was Re: TTL only - was RE: New fields in shim header?)

[Joe Touch]

Silvano Gai wrote:...
> In addition to ACLs, I have read that having the two RBridge addresses
> can be useful for:
> - Policy based forwarding
> - Network Troubleshooting
> - Hardware based learning

The source address tells you which source did the encapsulation, which
may have changed. It might be useful for debugging, but so might a lot
of other information; we can't fit a full set of diagnostics there.

Policy-based forwarding implies that the source rbridge is useful
information; as I noted in my other post, it can change while a packet
is in transit, so it doesn't really mean much anyway.

It'd be useful to understand what 'hardware based learning' refers to;
there are still source/dest MAC addresses used between the rbridge
components which support existing hardware learning ('smart bridges').

Joe

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