alias eth0 eepro100
options eepro100 options=0x30
#0x10 16 Force Full-Duplex operation (must be used with 0x20 or 0x40)
#0x20 32 Force 100mbps-only operation
#0x30 48 Force 100mbps-only with Full Duplex
#0x40 64 Force 10mbps-only
#0x50 80 Force 10mpps-only with Full Duplex
Faut la Doc de ta carte reseau afin de savoir quelle option il faut foutre