Anyone know if these would be the correct steps when changing our IPs? We have 3 SQL servers. Currently we have two different subnets. We are moving them all to one of the subnets. We would have to change the Failover cluster IP. We are hoping to use the second listener IP that's already on the other subnet. They are configured as availability group replicas. Windows 2012 R2, SQL Server 2012. I really don't want to break the replication and have to rebuild that.
1)Suspend data transfer to replicas
2)Take sql server instances offline
3)Change failover cluster ip (we need a new IP allocated for the new subnet. After this IP is changed on the failover cluster manager, the system will update the dns and AD):
4)Ipconfig /flushdns
5)Take failover cluster offline then put back online
6)Disable network node for old subnet (Windows Failover config: Network nodes > properties > disable)
7)Disable old subnet for listener. Windows Failover config > Roles > resources (take off line / remove)
8)Change machine ip’s for: Machine1 and Machine2
9)Ipconfig /registerdns
10)Enable sql server instances
11)Enable data transfer to replicas