I am running 2 2611XM's at a customer site running 12.2.11 (T6) I configured my HSRP and NAT according to the documentation provided by Cisco. My NATTED address shows up on the Active router with the MAC address of the local FastEthernet port. After 4 hours, my ARP table does it's clear, and my standby router used it's local FastEthernet MAC address for the NAT'd address. Duplicate IP address's pop up after this. Any thoughts, ideas?
