Modifies the Addresses attribute of the specified MOP Client
    to include at least the address or addresses in the specified set.

    add [node node-id] mop client client-name -
        addresses {lan-address[,lan-address...]}

    For OpenVMS, Phase IV nodes can use an extended DECnet LAN
    address in addition to their hardware address, so you must
    include both of these addresses in the addresses set. To
    calculate the extended DECnet address, express the Phase IV
    node address as a four-digit hex integer, then add the
    prefix AA-00-04-00.

    For example, if the Phase IV node named IMPLY has an
    address of 4.260:

             4.260

    Example:

    add mop client imply -
        addresses {08-00-2b-13-d6-e0, aa-00-04-00-04-11}