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Help with NIC Errors - packets dropped

I seem to be dropping packets on my main NIC but the server load isn't busy or is it flooded with traffic on the NIC:

RX packets:4197379 errors:32323 dropped:27993 overruns:0 frame:0

TX packets:6993341 errors:0 dropped:0 overruns:0 carrier:0


How do I diagnose these errors ? It's an Realtek RTL8111/8168B and Ubuntu Lucid Lynx.

Asked by:
BonoEstente
1464 points
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  • Responses in reverse (4)

Errors in RX, it means perhaps some clients create garbage

Response by:
jalal
3623 points
1) Check cable

2) Check connectors

3) Check slot, perhaps interface is not sitting on the motherboard


Response by:
jalal
3623 points
Faulty cables are often a source of network interface errors. Try changing the cable and seeing if that helps. Also check the speed and duplex setting of the network interface and the switch port. Most devices set this to auto-negotiate and this does not always work very well. Setting the link speed and duplex manually may help.

Response by:
Jimbob
437 points
Possibly the packets are dropped because they are invalid frames (too short, too long, ethernet checksum failure...)

If on Linux,

ethtool -S eth0

or

cd /sys/class/net/eth0/statistics && grep . *

might give more information.

Response by:
s
3383 points


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