Network issues

[btaber]

I have a strange network issue. There is a lot of transmit errors. I rent a dedicated server that I have had for about a year. I have contacted the provider of the server but they are no help. if I do a netstat -i I get:

Iface   MTU Met   RX-OK RX-ERR RX-DRP RX-OVR   TX-OK TX-ERR TX-DRP TX-OVR Flg
eth0   1500   0 1159213      0      0      0  894082   3118      0      0 BMRU

As you can see, there is 3118 TX errors, and that is after 6 hours of uptime. Where do I start to find the problem? Could it be a config issue? A hardware issue? Any help would be appreciated...

Brian

 

[RhythmAce]

Try lowering the value of MTU. This can be done by adding this line to /etc/sysconfig/network-scripts/ifcfg-eth0:

MTU=1464

The default is 1500. You can try lowering it by 10 or 20 until you end up with something that works. I built an l2tp tunnel which seemed to work well with mtu dropped to 1464 which is why I used that in the example.

 

[btaber]

Ok, I did that, but still the same. I thought you were on the right track... Here's some more info:

eth0      Link encap:Ethernet  HWaddr 00:20:ED:5B:A0:C9
          inet addr:213.110.167.20  Bcast:213.110.167.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1450  Metric:1
          RX packets:1569903 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1159811 errors:3591 dropped:0 overruns:0 carrier:7182
          collisions:22089 txqueuelen:100
          RX bytes:773557376 (737.7 Mb)  TX bytes:905347784 (863.4 Mb)
          Interrupt:12 Base address:0xff00

I am also getting this:
Jul 4 00:56:41 scotty kernel: eth0: Setting half-duplex based on auto-negotiated partner ability 0000.

Thanks for the help...

B

 

[Chacalinc]

it could be a wire problem... you get only errors on Tx, not Rx, so the switch/Ethernet card/router, etc. is not an issue... could be both the cable or the ethernet port.

This is my guess.

 

[btaber]

That is what I was thinking.... Of course their support inststs it is a "configuration issue, pay $150 per hour and we will fix it" anyhooo... Thank you.

 

[Chacalinc]

if you have the server in your hands... just replace the card! or you can try to replace the cable first (just in case)

Cheers.