The following requirements and guidelines apply to Oracle Solaris Cluster configurations that use Sun InfiniBand adapters from Oracle:
A two-node cluster must use InfiniBand switches. You cannot directly connect the InfiniBand adapters to each other.
If only one InfiniBand adapter is installed on a cluster node, each of its two ports must be connected to a different InfiniBand switch.
If two InfiniBand adapters are installed in a cluster node, leave the second port on each adapter unused for interconnect purposes. For example, connect port 1 on HCA 1 to switch 1 and connect port 1 on HCA 2 to switch 2 when using these connections as a cluster interconnect.