eth0 missing after upgrading from Hoary to Dapper

Posted by Twisol on Ask Ubuntu See other posts from Ask Ubuntu or by Twisol
Published on 2011-06-29T23:29:45Z Indexed on 2011/06/30 0:30 UTC
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networking

I'm trying to upgrade a fairly old server that's been running Hoary for the last five years. I followed the directions on the wiki, but when I restarted after upgrading to Dapper, eth0 disappeared from ifconfig -a. I can see two ethernet adapters in lspci and lshw, and if I put in an Ubuntu 10.10 LiveCD it registers eth0 and eth1 perfectly well. Their MAC addresses also match what's in /etc/iftab.

It was working fine before the upgrade, and I have no idea what else I should be trying at this point. The server is entirely cut off from the network right now.

EDIT: /etc/udev/rules.d/70-persistent-net.rules doesn't exist, either.

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