The optional Count argument is an integer between 0-4294967295
    which specifies the number of messages to be looped. The
    default count is 1.  Note, on failure of the loop test, NCL
    will display the count of messages successfully looped.

    loop  [node node-id] mop circuit circuit-name -
          address lan-address, -
          count integer [,optional arguments...]

    If an Address is not supplied in the command on a LAN circuit,
    then the Client argument must be specified so the address
    information can be obtained from the MOP Client database.

    loop  [node node-id] mop circuit circuit-name -
          client client-name, -
          count integer [,optional arguments...]

    Examples:

    loop mop circuit csmacd-1 address 08-00-2b-00-13-4F, count 50

    loop mop circuit fddi-1 -
         client mynode, count 10  ! Client gives default Address