How to update the interconnect protocol?

How to update the interconnect protocol?

Consider you want to change the UDP to IPC protocol for interconnect. Do the following activity,

1.) Login as root and unlock the grid home
    #cd $GRID_HOME/crs/install
    #perl rootcrs.pl -unlock -crshome /u01/app/11.2.0.grid

    $GRID_HOME=/u01/app/11.2.0/grid --> check the grid home in your environment.

2.) Change to grid owner and relink the binaries
    #su - grid
    $make -f $GRID_HOME/rdbms/lib/ins_rdbms.mk ipc_rds ioracle

3.) Re-lock the Grid home and restart the cluster
    #perl rootcrs.pl -patch

4.) Repeat all the above steps on each node.

Note:- The above is tested on my test lab. Please do test test test before applying to your own environment.