Address is the LAN address of node to loop.  If Address and
    Circuit information is not supplied in the command on a LAN
    circuit, then that information must be available from the MOP
    Client database.

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

    Optional arguments for this loop mop circuit command are:
    Assistance Type, Assistant Address, Assistant System, Count,
    Format, and Length.

    Example:

    loop mop client mynode -          ! Client provides Circuit.
         address 08-00-2b-33-45-DD