[Become a superuser.]
[Execute scsetup utility.]
# scsetup
*** Main Menu ***
    Please select from one of the following options:
    Option:  5
*** New Nodes Menu ***
    Please select from one of the following options:
      ...
      3) Specify the name of a machine which may add itself
      ...
    Option:  3
>>> Specify a Machine which may Install itself into the Cluster <<<
    ...
    Is it okay to continue (yes/no) [yes]? <Return>
    Name of the host to add to the list of recognized machines?  phys-schost-3
    Is it okay to proceed with the update (yes/no) [yes]? <Return>
 
scconf -a -T node=phys-schost-3
 
    Command completed successfully.
[Quit the scsetup New Nodes Menu and Main Menu:]
    ...
    Option:  q
[Verify the node has been added.]
# scconf -p | grep "Cluster new"
	Cluster new node authentication:      unix
	Cluster new node list:                phys-schost-3