[DRBD-user] problem with connection dropping

Mike Tewner tewner at gmail.com
Sun Aug 5 08:19:03 CEST 2007


Perhaps something simple like a flaky network cable?


On 8/4/07, Jérôme Augé <jerome.auge at gmail.com> wrote:
>
> 2007/8/3, Tom Brown <brown at esteem.com>:
> > I have a problem with network cards failing for resource 0 (r0). I
> thought it
> > was the cheap network cards in both nodes. So, I replaced them with
> Intel
> > Pro/1000 Gb cards. The connection worked at first and the sync finished
> > without a problem. Then, after a few days, the connection went back to
> > Primary/Unknown. I can't get ping through on that interface either. When
> I
> > replaced the network cards I moved things around so the network cards
> for r0
> > were in a different pci slot. Any ideas on what may be going on here? Is
> this
> > hardware issue? If so, any suggestions on a pci network card to use?
>
> Hi,
>
> First, how are your machines connected : with a crossover cable or
> with a switch ?
>
> When your problem happen, do you see incoming traffic on your network
> interface (tcpdump -nli <ethX>) ? do you have RX/TX
> drops/errors/overruns in the output of ifconfig on your ethX ? are the
> link status and negotiated speed and duplex mode correct (ethtool
> <ethX>) ? If you are connected to a switch, you might need to check
> the speed/mode negotiation and link status from the switch side too.
>
> You might also want to check for networking related kernel messages in
> dmesg/syslog (things like "ethX down", "NETDEV transmit timeout",
> "e1000 error", etc.)
>
> Regards,
> Jérôme Augé
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>
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