Doug Coats spake the following on 8/13/2007 12:22 PM:
Is the boards bios up to date?
Yes
Do you have the proper alias entries in /etc/modprobe.conf?
These are the relevent listings in the modprobe.conf
alias eth0 r8169 alias eth1 forcedeth
I have seen this issue with other boards that use the forcedeth driver. I think there is some bug in how it interacts with the nic chipset, but haven't seen a current patch. There is a patch slated for 2.6.19 kernel, (http://lwn.net/Articles/199045/) and I am sure RedHat will backport this as soon as it is tested.