Node B can communicate with an external host. Node A cannot communicate with any external hosts. A network interface state is Unreachable, Failed and then this network interface disappears from Cluster Administrator. The node B network interface state is Unreachable, and then Up. The Network state is Up.
B lose communication.
Node A and node B cannot communicate with any external hosts. B network interfaces is Unreachable, and they disappear from Cluster Administrator. The Network state is Down, and the network disappears from Cluster Administrator. When the LAN connection is restored, this LAN inherits the default network role which is to be used for both client and private communication. If something different is needed, it must be modified manually.