The following ports need to be up on all the nodes of SF Oracle RAC cluster:

The following command can be used to verify the state of GAB ports:

# gabconfig -a

GAB Port Memberships

Port a gen 7e6e7e05 membership 01
Port b gen 58039502 membership 01
Port d gen 588a7d02 membership 01
Port f gen 1ea84702 membership 01
Port h gen cf430b02 membership 01
Port o gen de8f0202 membership 01
Port u gen de4f0203 membership 01
Port v gen db411702 membership 01
Port w gen cf430b02 membership 01

The data indicates that all the GAB ports are up on the cluster having nodes 0 and 1.

For more information on the GAB ports in SF Oracle RAC cluster, see the Veritas Storage Foundation for Oracle RAC Installation and Configuration Guide.