Before you invoke OIFCFG, ensure that you have started Oracle Clusterware on at least the local node and preferably on all nodes if you intend to include the -global option in the command syntax.
Note:
To change the global network interface, Oracle Clusterware must be running on all cluster nodes.
Run OIFCFG from the Grid_home/bin/ directory as the user who installed the Oracle Clusterware software. For example:
$ ./oifcfg
Run the oifcfg -help command to display online help for OIFCFG.
$ ./oifcfg -help