two nics; inconsistent network interface number assignment

qanopus · 02-12-2007, 03:07 AM

Hi,

I'm having the following issue. I have two network cards in my box, eth0 and eth1. One is an mobo onboard card and the other addon card.

lspci output

Code:

00:05.0 Bridge: nVidia Corporation CK8S Ethernet Controller (rev a2)
02:07.0 Ethernet controller: ADMtek NC100 Network Everywhere Fast Ethernet 10/100 (rev 11)

The problem is, sometimes the onboard card is assigned eth0, and sometimes the ADMtek card is. I have DHCP to configure my network settigns and I have the following startup script to get around the problem:

Code:

#!/bin/bash

desktopIP=10.0.0.1
nmask=255.255.0.0

for iface in {eth1,eth0}; do
 
        /sbin/dhcpcd $iface -t 5s

        if [ -f /etc/dhcpc/dhcpcd-$iface.pid ]; then
                echo "dhcp running on $iface";
                exit
        else
                /sbin/ifconfig $iface $desktopIP netmask $nmask up
        fi

done

But how do I get around this in an elegant way?

uselpa · 02-13-2007, 01:55 PM

You don't say on which distro you have this problem, but if device names are given by udev, you can add rules to achieve persistent naming (see here).

qanopus · 02-14-2007, 09:25 AM

Thanks! I'm using slackware 11.0 (unofficial amd64 version) by the way, which I think does use udev.