heartbeats, it is considered down, and the recovery actions are performed.
If the cluster network fails, clustering will use another network that has been
configured to allow cluster communications if needed. It is important always to have
at least two networks configured to allow cluster communications.
The requirements of the cluster network have changed since early versions of
clustering because the cluster network is not just used for heartbeat communications,
but it is also used for Cluster Shared Volumes communications, which now leverage
SMB. The use of SMB means that the cluster network adapter must have both the
Client For Microsoft Networks and File And Printer Sharing For Microsoft Networks
bound, as shown in Figure 7.15. Note that you can disable the Link-Layer services
because they are not required for the cluster communications.