Running into an odd one:
I have two SQL 2014 servers in an Always-On cluster (herein named SQL-01 and SQL-02). Both nodes are on the same subnet, failover works like a charm, and most services barely have a blip when a failover occurs. I can connect to and ping the listener from other subnets, but only while SQL-01 is the primary. As soon as the cluster fails over to SQL-02, users not on the same subnet as SQL-02 are unable to connect to the listener. I can connect to the listener from SQL-01, SQL-02, or any endpoint within the same subnet regardless of which node is the primary. DNS is working and returning the same static IP of the listener in all cases.
I've tried recreating the listener, restarting the cluster resources, restarting the SQL services, and rebooting the SQL servers. I also verified with our network admin there are no...