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Re: [PLUG] Netdev Watchdog trasmit timed out, eth0 down.....my server was down, what do these messages mean?
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On Wed, Mar 28, 2007 at 10:45:41AM -0400, Chad Waters wrote:
> On 3/28/07, Marc Zucchelli <X> wrote:
> >I was not able to ping my server this morning. I sent a reboot request to
> >the datacenter. Unsure of where to begin investigating, I looked in
> >/var/log/messages and I see these lines over and over again:
> >
> >Mar 28 00:32:53 localhost kernel: NETDEV WATCHDOG: eth0: transmit timed out
> >Mar 28 00:32:53 localhost kernel: tg3: eth0: Link is down.
> >Mar 28 00:32:55 localhost kernel: tg3: eth0: Link is up at 10 Mbps, full
> >duplex.
> >Mar 28 00:32:55 localhost kernel: tg3: eth0: Flow control is off for TX and
> >off for RX.
> >Mar 28 00:42:02 localhost kernel: APIC error on CPU0: 40(40)
> >
> >Has anybody seen this before? Would this be the reason I wasn't able to
> >ping the server? What is Netdev Watchdog? What could be causing this
> >problem? What do I need to do to get to the bottom of it and fix the
> >underlying problem?
> >
> >Separatly, I am seeing the APIC error on CPU0: 40(40) message every few
> >hours up until the beginning of the /var/log/messages file, which is March
> >25th. The server has been up since then, I'm sure that message isn't a big
> >deal, or is it?
>
> Are you expecting a 10Mbs connection speed? There maybe some link
> negotiation mismatch.
I agree. I've seen this when the autonegotiation is going haywire. Try
locking the NIC to the correct speed and duplex with ethtool or mii-tool
and periodically checking for the return of these messages.
--
Toby DiPasquale
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