3 Setting Up an OCFS2 Cluster
A cluster consists of members called nodes. For best performance, give each node in the cluster at least two network interfaces. The first interface is connected to a public network to provide general access to the systems, while the second interface is used for private communications between the nodes and the cluster heartbeat. The second interface lets the cluster nodes coordinate their access to shared resources and monitor each other's state.
Important:
Both network interfaces must be connected through a network switch. Also, you must ensure that all the network interfaces are configured and working before configuring the cluster.