We are having issue with our SQL2008 cluster. Preferred Node randomly failover to another node and it has been happening for couple time during the years.
For some of the application like VMware VCenter that are not cluster aware, service will fail instantly when failover happen.
After I did some research, I found Windows Server 2008R2 failover clustering use IPv6 by default for keeping track of its nodes heartbeat. And also there is known issue to VMware SQL node packet dropping to large amount of traffic.
The VMware part should be a easy fix.....Unfortunately, not all our Network equipment are IPv6 ready.
My question is: What is the proper way to disable IPv6 from a production Failover cluster?
Thanks.