Hello, my redhat9 machine has 2 ethernet cards on them, one connects to the cable modem, and one serves as gateway for NAT(eth0 for NAT gateway, eth1 for cable modem). However, the one thats connecting to the cable modem cannot detect IP address on boot, i have setup my ifcfg-eth1 to use dhcp which doesn't work, using ifup eth1 it says no link...cable?? or somethign like that. However!! when i switch to this 3rd NIC card i have, it(eth1) works! automatically! Can someone tell me how to setup the old one so it will auto probe IP from cable modem? does it have to do with crossover cable or all that?
thanks!!

ps. i have to make it work because the 3rd nic card is for my regular machine.

thanks!!

Have you verified that Card 1 (to cable modem) simply isn't bad/broken? (I've had that happen before) Are all the cards the same brand? Could be driver problem if Card 1 is something "unusual" (from a Linux perspective, at least )

Some cable companies match themselves to the MAC address of the network card and won't work on any other. You may have to set up this new card with ISP or use the old card.

Hi, my company is SHAW, which is not like telus that requires a MAC registration. I will test it on my windows machine. So NIC card is always capable of distinguising between crossover and regular cable?? thanks

I'm no expert on this, but I don't think it's the card "distinguishing" between the cables, it's simply that you need to crossover so that the input for card A gets the output signal from Card B (and vice versa) (Apologies to any network techs out there screaming right now )