[CentOS] weird network error

[m.roth at 5-cent.us]

John R Pierce wrote:
> a previously rock solid reliable server of mine crashed last night, the
> server was still running but eth0, a Intel 82574L using the e1000e
> driver, went down.   The server has a Supermicro X8DTE-F (dual Xeon
> X5650, yada yada).    server is a drbd master, so that was the first
> thing to notice network issues.   Just a couple days ago I ran yum
> update to the latest, I do this about once a month.
>
> /var/log/messages logged...
<snip>
> (prior to this was nothing but normal smbd complaining about CUPS not
> configured).
> Duplex, Flow Control: Rx/Tx
> May  9 22:52:56 sg1 kernel: e1000e: eth0 NIC Link is Down
> May  9 22:53:01 sg1 kernel: e1000e: eth0 NIC Link is Up 1000 Mbps Full
> Duplex, Flow Control: Rx/Tx
> May  9 22:55:30 sg1 kernel: e1000e: eth0 NIC Link is Down
> May  9 22:55:35 sg1 kernel: e1000e: eth0 NIC Link is Up 1000 Mbps Full
> Duplex, Flow Control: Rx/Tx
<snip>
This is going to sound really stupid, but consider replacing the patch
cord. If that doesn't work... should I assume that this m/b has at least
two embedded NIC? If so, try using the other NIC.

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