Cluster node '%1' lost communication with cluster node '%2'. Network communication was reestablished. This could be due to ...

Cluster node '%1' lost communication with cluster node '%2'.  Network communication was reestablished. This could be due to communication temporarily being blocked by a firewall or connection security policy update. If the problem persists and network communication are not reestablished, the cluster service on one or more nodes will stop.  If that happens, run the Validate a Configuration wizard to check your network configuration. Additionally, check for hardware or software errors related to the network adapters on this node, and check for failures in any other network components to which the node is connected such as hubs, switches, or bridges.