IP transfer Resolving issue

Head Surfer
October 9th, 2008

With most NOC’s you receive a set of dedicated IP addresses. From time to time it’s necessary to move a domain/IP to a different server within your cluster.

For this example we have domain.com that’s located on host1. You then move the domain to host2 and you want the IP to remain the same. However, after moving the domain and IP to host2 the domain/IP doesn’t resolve! Check and most likely the domain has been moved along with the IP address, however the network still thinks the IP address is located on host1. To resolve this you have to login to host2 and send an arp broadcast to the network that notifies the network that the IP is now on host2.

Login to host2 via SSH
run:
arping -U -I eth0 $IP

This corrects the ARP/Mac Address problem and points your IP immediately to the new server!!!!

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