How to Change Public IP,Private IP and VIP in Oracle 10g RAC on Linux

Changing the IP at OS level without updating the oracle cluster will crash the cluster.

Hence below are steps which provides the process of changing the IP on Cluster nodes.

Here i am using 2 node cluster on RHEL AS-4.

1) Shut down all the services like database,ASM,nodeapps on the both the nodes.

Here in my case only cluster services are running




2)Change the Public IP and Private IPin clusterware. Fire the statement from the node from which you have installed clusterware.

Here my previous IP was 172.26.0.0 series and i am changing it to 172.25.0.0 series





3) Change the Virtual IP

Change the VIP as it needs to be in the same subnet as of Public IP

My VIP was 172.26.16.61 on node2 and i am changing it to 172.25.16.61. Similarly for node1






4) Shut down the cluster on all nodes

node1 #]crsctl stop crs
node2 #]crsctl stop crs

5) Now change the IP at OS level and change the /etc/hosts file on both nodes

Changing from 172.26.0.0 series to 172.25.0.0 series.




6) After performing all the above steps reboot both the nodes.