03-31-2009 01:30 PM - edited 03-04-2019 04:10 AM
If you have (failover) senario where adjusting the arp cache timeout on a router interface (from default of 4 hours) could prove beneficial is there a recommened minimal threshold to not go below in seconds?
Thanks,
Brandon
03-31-2009 01:46 PM
It is generally recommnded to have the arp timeout same as that of the mac-address aging time (300 sec). It can be used as a threshold
Are you having unicast flooding in your network to adjust the arp timers?
http://www.cisco.com/en/US/tech/tk648/tk362/technologies_tech_note09186a0080094afd.shtml#t8
Narayan
03-31-2009 01:52 PM
There is a setup with a vendor that when they failover to a backup link sometimes we have to manually clear arp on our primary router.
I wonder if the "arp probe interval" under the specific interface where arp needs to be cleared would be a good choice?
Thanks
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