Monday, December 16, 2019

Cisco Default ARP Timeouts

Noticed the default ARP timeout is 4 hours for my 3650's! Any reason why this is so high? I feel like it should be closer to the MAC timeout (5 minutes). Nexus is 30 minutes, which sounds more reasonable.

Has anyone ever tweaked this timer before? Are there any negatives to considerably lowering it? I just don't understand where Cisco got 4 hours for IOS devices...



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