[j-nsp] MX, ARP cache with L2 bridging

[Nicolaj Kamensek]

Hi list,

I've just learned that even if the MX operate in L2 bridging mode with 
irb interfaces and an IP address moves from one bridged interface to 
another, the arp cache timeout still applies. This is a pain since this 
might affect convergence time in case of a link failure when 
spanning-tree chooses an alternate path and the ip is then seen on 
xe-0/0/1 instead of xe-0/0/0. Is there anything I can do to optimize 
that behaviour? Clearing the arp cache every few minutes is obviously 
not a good idea in respect of the cpu load.


Thanks!