Change VIP Addresses

1.Determine the interface used to support your VIP:

 $ ifconfig -a

2.Stop all resources depending on the VIP:

$ srvctl stop instance -d DB -i DB1

$ srvctl stop asm -n node1

# srvctl stop nodeapps -n node1

3.Verify that the VIP is no longer running:

$ ifconfig -a

$ crs_stat

4.Change IP in /etc/hosts and DNS.

5.Modify your VIP address using srvctl:

# srvctl modify nodeapps -n node1 -A 192.168.2.125/255.255.255.0/eth0

6.Start nodeapps and all resources depending on it:

# srvctl start nodeapps -n node1

7.Repeat from step 1 for the next node.

Thank You 

Osama Mustafa