Hi Experts,
Our server host is running on Windows 2008 cluster, there are 10 active SQL instances are runnning using dynamic ports.
We rebooted node 1, all instances are failover to node2, however, we found one instance's dynamic port is changed unexpectedly, while remaining other instances' ports are unchanged after failover.
After failover back to node 1, the port number of that instance is still unable to be resumed to the original port number and we need to mannually configure it back to the origin port number.
We confirmed no any applications are using the originaly port number on node2.
Does any expert can advice the reason?