[DRBD-user] problem with connection dropping

Jérôme Augé jerome.auge at gmail.com
Sat Aug 4 11:05:39 CEST 2007


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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