Provider standard ARP Timeout?

Jay Nakamura zeusdadog at
Fri Aug 10 14:23:26 UTC 2012

Cisco default ARP timeout is 4 hours.  Do anyone change that to
something shorter in a provider environment for customer with Ethernet
connectivity?  What is a good value to set it to?

Are there any impacts for lowering the timeout?  Other than higher CPU
util for doing ARP a lot more on the router?

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