media type
Set the physical port or medium type to be used by the device. Not all devices can change this setting, and those that can vary in what values they support. Typical values for type are 10base2 (thin Ethernet), 10baseT (twisted-pair 10Mbps Ethernet), AUI (external transceiver) and so on. The special medium type of auto can be used to tell the driver to auto-sense the media. Again, not all drivers can do this.
Linux Tulip driver version 1.1.13-NAPI (May 11, 2002)
tulip0: EEPROM default media type Autosense.
tulip0: Index #0 - Media 10baseT (#0) described by a 21140 non-MII (0) block.
tulip0: Index #1 - Media 100baseTx (#3) described by a 21140 non-MII (0) block.
tulip0: MII transceiver #1 config 3100 status 786b advertising 01e1.
eth0: Digital DS21140 Tulip rev 34 at 0xe800, 00:C0:95:FA:0D:FA, IRQ 10.
NET: Registered protocol family 17
eth0: Setting full-duplex based on MII#1 link partner capability of 45e1.
eth1: Media Link On 100mbps full-duplex