Creates an instance of an HDLC link entity, which is associated with
    a port of the supporting physical layer module.  It contains
    attributes common to local HDLC operations for all logical stations
    on that line.

    create [node node-id] hdlc -
       link link-name [linktype link-type] [,profile latin1string]

    Link-name is a simplename that identifies this HDLC link instance.
    The Linktype and Profile arguments are optional.

    Example:

    create hdlc link hdlc-0

    Select logical_station for information on creating hdlc link
    logical station subentities.