Hello All --- My driver is 3c59x and my NIC card is "3Com Corporation|3c905C-TX [Fast Etherlink]". in my modules.conf file there's a line: alias eth0 3c59x I know that the following line will force full duplex.... alias eth0 3c59x full_duplex=0,0,1 But what I need to do here is FORCE half-duplex.... is this possible? If so... how? Thanks jeff