Changing your IP address, and the effect it has on ARP caches
Posted on 2004-11-08
Say I'm ip address 192.168.1.15. And I change my IP address to 192.168.1.20.
Will my router still have my MAC address MAPPED to 192.168.1.15 for a few minutes thereafter?
I've noticed that if I change my IP address, then view traffic with a sniffer. I can sometimes see my OLD IP address still doing ARP requests like a ghost (and no, no one was reassigned my old address). The problem fades away after a few minutes (hours?)
Would the "clear arp cache" command remedy this situation?