eth0 binding

sew2athotmail · 08-03-2001, 12:14 PM

how does linux know which network device(eth0, eth1, etc) to bind to which device for pcmcia devices. I recently set up a laptop with a pcmcia card and within linuxconf I only specified and IP address and netmask. The system found the card and it worked. What if a network card was onboard. How would the system know which card to bind eth0 to. Or if there were two pcmcia devices.

Breezwell · 08-03-2001, 03:40 PM

I have not tried multi-homed system configuration yet, but the best bet would be to simply configure the onbaord NIC as eth0, then install the second NIC and make that eth1.

As far as how Linux determines which card is which if both are in at the same time when you try to configure each one, I am not sure.

sew2athotmail · 08-03-2001, 03:52 PM

I can make the system multihomed with no problem I was just curious as to how the system assigns etho with no io values or irqs or kernel modules to alias eth0 to. Maybe there is a file that list the cards by the time they were installed. Such as the first installed card is eth0 and the second is eth2.

Breezwell · 08-04-2001, 12:29 PM

Try looking in the /proc directory.
I know it lists info on hard drives and such. You might find someting in there relating to the IP address mappings for your NIC's.

I know that when you boot you also get a listing of IP address mappings. It may list the card also. If you log as root, go to a terminal and run the 'dev' command. This should, if I remember right, give you the same output that you see during the boot process. You can pipe this to file so you can read it in Vi or Pico later.