Add this planning information to the "Cluster Interconnect Worksheet" in Sun Cluster 3.0 Release Notes.
The cluster interconnect provides the hardware pathway for private network communication between cluster nodes. Each interconnect consists of a cable between two transport adapters, a transport adapter and a transport junction, or two transport junctions. During Sun Cluster installation, you specify the following configuration information for two cluster interconnects.
Transport adapters - For the transport adapters, such as ports on network interfaces, specify the transport adapter names and transport type. If your configuration is a two-node cluster, you also specify whether your interconnect is direct connected (adapter to adapter) or uses a transport junction.
Transport junctions - If transport junctions, such as a network switch, are used, specify the transport junction name for each interconnect. The default name is switchN, where N is a number automatically assigned during installation. Also specify the junction port name, or accept the default name. The default port name is the same as the node ID of the node hosting the adapter end of the cable. However, you cannot use the default port name for certain adapter types, such as SCI.
Clusters with three or more nodes must use transport junctions. Direct connection between cluster nodes is supported only for two-node clusters.
You can configure additional private network connections after installation by using the scsetup(1M) utility.
For more information about the cluster interconnect, refer to Sun Cluster 3.0 Concepts.