change VIP address

1. determine the interface used to support the VIP
$ ifconfig –a

2. stop all resources depending on the VIP
$ srvctl stop instance –d DBRAC –i DB1
$ srvctl stop asm –n node1
$ srvctl stop nodeapps –n node1

3. verify that the VIP is no longer running
$ ifconfig –a
And/Or
$ crs_stat

4. change IP in /etc/hosts and DNS

5. modify the 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