Default: 2048          Value for Tru64 UNIX: 128-(2 raised to the
                                                    power of 32 -1)
    Default: 2048          Value for OpenVMS: 2048

    When operating over the CONS, the maximum NSDU size to use for
    transmit and receive buffers. Expressed as a number of octets.

    set  [node node-id] osi transport template template-id -
         maximum ndsu size integer

    Example:

    set osi transport template osit$loop_clns -
         maximum ndsu size 2048