[rbridge] Proposed compromise for short/long hellos

[Dinesh G Dutt]

I like this proposal,

Dinesh
Radia Perlman wrote:
> After listening to the discussion at the meeting, and talking to some 
> people in the hall, I hope
> this might be palatable to everyone.
>
> a) have only one type of Hello: the original type, but say in the spec 
> that Hellos
> MUST NOT be padded. Also mention a maximum size, and say that this might
> limit really really really creative appointments of lots of appointed 
> forwarders for lots
> of VLANs.
>
> b) have another type of mechanism, perhaps called "MTU discovery", which 
> would
> be a pairwise protocol between two RBridges R1 and R2, where R1 sends a 
> padded
> message, and R2 acks it if R2 received it. This would be an optional 
> protocol specified
> in a separate document
>
> c) we'd add a bit to the Hello saying "I support the MTU discovery protocol"
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