Sun Cluster Software Installation Guide for Solaris OS

Cluster Interconnect

The cluster interconnects provide the hardware pathways for private-network communication between cluster nodes. Each interconnect consists of a cable that is connected in one of the following ways:

For more information about the purpose and function of the cluster interconnect, see Cluster Interconnect in Sun Cluster Concepts Guide for Solaris OS.

Note –

You do not need to configure a cluster interconnect for a single-host cluster. However, if you anticipate eventually adding more voting nodes to a single-host cluster configuration, you might want to configure the cluster interconnect for future use.

During Sun Cluster configuration, you specify configuration information for one or two cluster interconnects.

You can configure additional cluster interconnects, up to six interconnects total, after the cluster is established by using the clsetup(1CL) utility.

For guidelines about cluster interconnect hardware, see Interconnect Requirements and Restrictions in Sun Cluster 3.1 - 3.2 Hardware Administration Manual for Solaris OS. For general information about the cluster interconnect, see Cluster-Interconnect Components in Sun Cluster Overview for Solaris OS and Sun Cluster Concepts Guide for Solaris OS.

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-host cluster, you also specify whether your interconnect is a point-to-point connection (adapter to adapter) or uses a transport switch.

Consider the following guidelines and restrictions:

See the scconf_trans_adap_*(1M) family of man pages for information about a specific transport adapter.

Transport Switches

If you use transport switches, such as a network switch, specify a transport switch name for each interconnect. You can use the default name switchN, where N is a number that is automatically assigned during configuration, or create another name.

Also specify the switch port name or accept the default name. The default port name is the same as the internal node ID number of the Solaris host that hosts the adapter end of the cable. However, you cannot use the default port name for certain adapter types, such as SCI-PCI.

Note –

Clusters with three or more voting nodes must use transport switches. Direct connection between voting cluster nodes is supported only for two-host clusters.

If your two-host cluster is direct connected, you can still specify a transport switch for the interconnect.

Tip –

If you specify a transport switch, you can more easily add another voting node to the cluster in the future.