I am using arp-timeout 900 (means 15min), because of having problems with my upstream ethernet connection and everything is ok, and I have not seen any relation between MAC Address aging time and that, aging time is default 300sec for me ;) Thanks On Fri, Aug 10, 2012 at 6:53 PM, Jay Nakamura <zeusdadog@gmail.com> wrote:
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?
-- Regards, Shahab Vahabzadeh, Network Engineer and System Administrator Cell Phone: +1 (415) 871 0742 PGP Key Fingerprint = 8E34 B335 D702 0CA7 5A81 C2EE 76A2 46C2 5367 BF90