[rbridge] Max Network size

[Joe Touch]

Guillermo Ibáñez wrote:
...
> I agree with your view, except about ARP. 
> Is there any estimation on the ARP load expected on Rbridges as ARP 
> proxies and hosts in general (ARPs unsolved by proxies)?
> I wonder whether the Rbridges are the most suited devices to handle many 
> ARP requests. For big networks like this it might be worth to consider 
> the use of separate ARP servers distributed over the subnetwork instead 
> of ARP proxies at Rbridges.

I am anticipating that RBridges should handle ARPs via broadcast as a
default; we're looking into proxy-ARP based on knowledge of ingress
locations, to reduce ARP load. That solution would need to be fault
tolerant to loss of the proxy mechanism, whether distributed or at a server.

Joe

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