Library /sys$common/syshlp/tcpip$ucp_help.hlb SET, CONFIGURATION, INTERFACE, Qualifiers, /ARP  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /ARP
       /NOARP

    Optional. Default: /ARP.

    Enables IP address-to-hardware address (Ethernet or FDDI)
    mapping.

    /ARP is valid when you create an interface but not when you
    modify an existing interface.