Starts a loop test between the loopback applications on the
    specified source and destination nodes. The node keyword
    specifies the node from which the loop messages are sent. If
    you omit this keyword, the test is performed from the node on
    which you issue the loop command. The name or address argument
    specifies the node whose loop mirror is used to reflect the
    messages back to the originator. Specify either the name or
    address (but not both).

                                               address tower-set
                                               count integer
    loop  [node node-id] loopback application  format hex-string
                                               length integer
                                               name full-name