the default setting is for auto-negotiation to be enabled. change this setting only to match your link partner.

    the adapter will not operate at gigabit speed (1000 mbps) if you disable auto-negotiation.

    you cannot change the speed or duplex of intel pro/1000 adapters that use fiber cabling.

    if auto negotiation is disabled, you can specify forced speed (to 10 or 100 mbps, but not 1000 mbps) and duplex. in this situation, the negotiable speeds and duplexes checkboxes are disabled, since these are set to advertise speeds during auto-negotiation.

    if auto negotiation is enabled, the negotiable speeds and duplexes checkboxes are enabled, allowing specific speed advertisement and disabling the forced speed and duplex selection buttons.

    if you need to manually change the settings:

    1. double-click the intel proset icon from the control panel or system tray.

    2. click the link config tab and highlight the desired adapter in the left window.

    3. click disabled and then set the speed and duplex parameters that match your switch.

    4. click ok to finish.

    5. restart your computer if prompted.