GPFS and network communication

Within the GPFS cluster, you can specify different networks for GPFS daemon communication and for GPFS command usage.

You can select the different networks by issuing mmaddnode, mmchnode, and mmcrcluster commands. In these commands, the node descriptor allows you to specify separate node interfaces for those functions on each node. The correct operation of GPFS is directly dependent upon these selections.

GPFS might not work properly if there is a firewall enabled on the nodes within the cluster. To ensure proper operation, you must either configure the firewall to allow the appropriate ports or disable the firewall. For more information, see IBM Storage Scale port usage and mmnetverify command.