Knowledge Base - FAQ
Question: How can I force the switch to use a new MAC address for an IP?TO BE DONE FROM THE SERVER THE IP WAS MOVED TO:
An article here suggests the following:
arping -S <our_IP> -B
That didn't work for me... I think our arping is too old? This worked though:
arping -c 2 -s <our_IP> -U <broadcast_IP>
eg: arping -c 2 -s 204.13.11.78 -U 204.13.11.255
When transitioning an IP from one host to another, it took about 60 seconds to transition without arping, and just a few seconds with using arping. There may be additional benefits at the router level, where the arp timeouts are much longer.
Our current broadcast IPs:
69.59.195.255
65.212.181.255 (note: 181, not 180!)
204.13.10.255
204.13.11.255
etc... you get the idea...
Last Modified: Aug 11, 2010