GNU/Linux Command – MII-TOOL

mii-tool — Show/Check/Set the MII status.

Summary:

MII (Media Independent Interface) is a standard bus which connects network interface controllers to physical media interfaces (PHYs). PHYs are usually located on a network interface card itself, but there are cards available which have external MII connectors for attaching external PHYs. mii-tool display/ checks/ sets the status of a network interface’s MII unit. Most fast Ethernet adapters use an MII to auto-negotiate link speed and duplex setting.

Examples:
# mii-tool -- Show shot status info about the network card. # mii-tool -v -- Show detailed status. # mii-tool -R -- Reset the MII unit to default value. # mii-tool -r -- Restart the Auto Negotiation. # mii-tool -w -- Watch the network interface and show if there is any change in the status.(Run it and remove and reconnect the cable). # mii-tool -F 10baseT-HD -- Forcibly set the capability to 10Mpbs and Half Duplex mode. # mii-tool -A 10baseT-HD, 10baseT-FD -- Enable and restart Auto Negotiation, and advertise only the specified capabilities.
Read: man mii-tool

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