HOW TO: Change IP addresses on a cluster

by Bharat Suneja

A “Re-IP-ing” project around the corner where you need to change IP addresses on all hosts in a subnet? Or just a cluster? When you change the IP addresses on cluster nodes, cluster resources go offline.

With the IP addresses on nodes changed (while moving to different network/subnets), when you start Cluster Admin you can’t connect to the cluster. The IP address resource in your Cluster Group still has the old IP, which means your cluster nodes and the cluster itself are on different networks!

To change the IP address on the cluster, start Cluster Administrator and connect to the node name or . (dot). Go to IP address resource | properties | Parameters and change the IP address (and subnet, if required). Make sure the correct network is selected from the Network drop-down. (In most such situations, it’ll be the Public network that’s impacted).

Now you can bring the Cluster Group online.

If you have any other resource groups (like an Exchange Virtual Server resource group for Exchange clusters), you may need to repeat the process for those groups.

{ 3 comments… read them below or add one }

Anonymous January 26, 2007 at 12:48 pm
Adrian March 19, 2009 at 4:03 pm

Is there a way to reconfigure a multi-subnet CCR cluster to use a single subnet?


albertwt November 21, 2013 at 12:18 am

Hi Bharat,

Does changing only one of the cluster IP address requires to take down the entire mailbox server both Active and Passive nodes ?

or the active mailbox can be fail over so the passive node can have the IP changed.


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