o  enable mac address failed

    The attempt to enable the MAC address failed on a broadcast
    circuit with a nonzero Phase IV address.

 o  no such data link

    Data link specified for this circuit does not exist.

 o  open port failed

    A port cannot be opened on the specified data link.

 o  open rip port failed

    The UDP port for RIP (port 520) could not be created.

 o  routing not enabled

    The Routing module is not in the on state.

 o  subnet address not unique

    One of the subnet addresses for this circuit is the same as the
    subnet address for another circuit.