Oracle RAC 19c: Change VIPs adresses

This tutorial explains how to change the Node VIP (Virtual IP) addresses in an Oracle RAC 19c cluster running Oracle Grid Infrastructure 19c.

Applies to:

Oracle RAC 19c
Oracle Grid Infrastructure 19c
Linux
Static VIP configuration (non-DHCP)

Note: This procedure changes Node VIPs only. It does not modify:

Public IPs
Private Interconnect
SCAN VIPs
Hostnames

Example Environment

Node	Hostname	Current VIP	New VIP
Node1	rac19c-node01	192.168.10.101	192.168.20.101
Node2	rac19c-node02	192.168.10.102	192.168.20.102

Note:

Subnet mask: 255.255.255.0
Public interface: pubnet

Step 1: Check Current VIP Configuration

[grid@rac19c-node01 ~]$ srvctl config vip -node rac19c-node01
VIP exists: network number 1, hosting node rac19c-node01
VIP Name: rac19c-node01-vip.wadhahdaouehi.tn
VIP IPv4 Address: 192.168.10.101
VIP IPv6 Address:
VIP is enabled.
VIP is individually enabled on nodes:
VIP is individually disabled on nodes:
[grid@rac19c-node01 ~]$ srvctl config vip -node rac19c-node02
VIP exists: network number 1, hosting node rac19c-node02
VIP Name: rac19c-node02-vip.wadhahdaouehi.tn
VIP IPv4 Address: 192.168.10.102
VIP IPv6 Address:
VIP is enabled.
VIP is individually enabled on nodes:
VIP is individually disabled on nodes:
[grid@rac19c-node01 ~]$ olsnodes -n
rac19c-node01   1
rac19c-node01  2

Step 2: Modify the VIP Address


[root@rac19c-node01 ~]# srvctl modify nodeapps -n rac19c-node01 -A 192.168.20.101/255.255.255.0/pubnet
[root@rac19c-node01 ~]#
[root@rac19c-node01 ~]# srvctl modify nodeapps -n grac19c-node02 -A 192.168.20.102/255.255.255.0/pubnet

Step 3: Verify la modification:

[root@rac19c-node01 ~]# srvctl config vip -n rac19c-node01
VIP exists: network number 1, hosting node rac19c-node01
VIP Name: rac19c-node01-vip.wadhahdaouehi.tn
VIP IPv4 Address: 192.168.20.101
VIP IPv6 Address:
VIP is enabled.
VIP is individually enabled on nodes:
VIP is individually disabled on nodes:
[root@rac19c-node01 ~]#
[root@rac19c-node01 ~]#
[root@rac19c-node01 ~]# srvctl config vip -n rac19c-node02
VIP exists: network number 1, hosting node rac19c-node02
VIP Name: rac19c-node02-vip.wadhahdaouehi.tn
VIP IPv4 Address: 192.168.20.102
VIP IPv6 Address:
VIP is enabled.
VIP is individually enabled on nodes:
VIP is individually disabled on nodes:
[root@rac19c-node01 ~]#
[root@rac19c-node01 ~]#

Important Notes

Ensure that the new VIP addresses are reserved and reachable on the target subnet before making the change.
This procedure changes only the Node VIPs.
Perform the operation during a maintenance window, as active client connections using the affected VIP may be interrupted while the VIP is stopped and restarted.