This article describes how to change the IP addresses of
the network adapters in the nodes of a cluster.
During this procedure, it is important that the cluster
server maintain a connection to the network. This is necessary so that it can
communicate with a domain controller to validate the cluster server Service
This article assumes that there are two nodes named A and
For more information about clustered Microsoft SQL Server installations, click the following article number to view the article in the Microsoft Knowledge Base:
How to change the network IP addresses of SQL Server failover cluster instances
- Change the IP address of the network adapter on node A.
This may require the computer to be rebooted. If you are prompted to restart
the computer, do so.
- Start Cluster Administrator and open a connection to the
cluster. To administer the cluster, you need to open a connection to "."
(without quotation marks) in Cluster Administrator when you are prompted to do
so. You must perform this process on one of the nodes in the cluster. If you do
this remotely, it may be possible to open a connection to the name of the node
itself. During this process, Cluster Administrator may respond with the
following error message:
This occurs because Cluster Administrator attempts to connect to the last
cluster it administered.
A connection to the cluster at
cluster name could not be opened. This may be caused
by the Cluster Service on node cluster name not
being started. Would you like Cluster Administrator to attempt to start the
Cluster Service on node cluster name?
- Double-click the IP Address resource to open its properties.
- On the Parameters tab in the IP Address resource properties, make sure that the
Network to Use box contains the new network as the network to
- Fail all groups over to the functional node A.
- Change the IP addresses for the network adapters in node
- Reboot the computer.
- When both nodes agree on the subnets, the old networks
disappear and the new networks are created.
- You can rename the networks at this time.
You use "." to administer the cluster because the IP Address
resource does not come online when the Cluster service recognizes a new network
and no longer uses the old network.
For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
Changing the IP address of a cluster adapter may result in failover
Article ID: 230356 - Last Review: October 15, 2009 - Revision: 6.0
- Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)
- Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)
- Microsoft Cluster Server 1.1
- Microsoft Windows 2000 Advanced Server
- Microsoft Windows 2000 Datacenter Server
- Microsoft Windows NT Server 4.0 Enterprise Edition
- Microsoft Exchange Server 2010 Standard