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Best of Technical Support

Issue 72

From Issue #72
April 2000

Apr 01, 2000  By Various
 in
Our experts answer your technical questions.
Ethernet Cards

I want to convert my existing proxy server for my home network to Linux. But every distribution I have used has never detected both network cards until SuSE 6.3. I can manually get the card on the LAN to find the DHCP server, and the NT gives it an IP address, but can never ping that server; if I change it to a static IP address, it pings the NT server fine. The real problem is I have a cable modem on the other NIC, on which I have set up DHCPclient. I have viewed and edited the sbin/init.d/dhclient file to make sure it has the ifconfig $NETDEV 0.0.0.0 up statement in it. I have read the FAQ and I still cannot get this to work. —Stephen Heaton, srheaton@mediaone.net

All recent distributions work more or less the same in regard to more than one Ethernet card if they are PCI, as they can all be autodetected easily. You may, however, need to add an alias for eth1 in /etc/conf.modules. For example, your conf.modules could look like this:

alias eth0 tulip
alias eth1 eepro100

After that, you simply need to ifconfig each card in the usual fashion.

Are you sure that Linux does receive a correct IP, netmask and broadcast from the DHCP server? You should type ifconfig eth0 (or eth1) and compare the info you're getting from DHCP with the info you're setting by hand.

The last part, I'm not too sure about. I myself haven't had much luck with SuSE's DHCP client, while Red Hat's dhcp client has worked better for me with no special configuration required. —Marc Merlin, marc_bts@valinux.com

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