A cluster node is a IBM® i system or logical partition that is a member of a cluster.
When you create a cluster, you specify the systems or logical partitions that you want to include in the cluster as nodes. Each cluster node is identified by a 1 to 8 character cluster node name which is associated with one or two IP addresses that represent the system. When configuring a cluster, you can use any name that you want for a node in the cluster. However, it is recommended that the node name be the same as the host name or the system name.
Cluster communication makes use of the TCP/IP protocol suite to provide the communications paths between cluster services on each node in the cluster. The set of cluster nodes that are configured as part of the cluster is referred to as the cluster membership list.