/SPEED=value

    Sets the speed of the LAN.

    Valid values are 10, 100, 1000, 10000, or autonegotiate; the last
    choice, autonegotiate, selects the 10 megabits per second for
    Ethernet, 100 for Fast Ethernet, 1000 for Gigabit Ethernet, and
    10000 for 10-Gigabit Ethernet. If you select autonegotiate, the
    LAN driver redoes auto-negotiation.