Interface with many errors

rod at tpgi.com.au rod at tpgi.com.au
Wed Dec 11 09:55:18 EST 2002


From:           	Michael Still <mikal at stillhq.com>
To:             	Linux user group <linux at samba.org>
Subject:        	Interface with many errors
Date sent:      	Mon, 9 Dec 2002 19:57:55 +1100

> 
> Hello.
> 
> I have a machine plugged into a Cisco 1900 10mbit switch via some CAT5. I
> am looking at the ifconfig provided network statistics, and about half of
> the packets are errors. Any ideas what might cause this?
> 
> eth0      Link encap:Ethernet  HWaddr 00:20:35:71:B5:F0
>           inet addr:172.31.0.61  Bcast:172.31.0.255  Mask:255.255.255.0
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:1305814 errors:525101 dropped:0 overruns:0 frame:788589
>           TX packets:819869 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:100
>           RX bytes:1898529454 (1810.5 Mb)  TX bytes:54543631 (52.0 Mb)
>           Interrupt:9 Base address:0xe000
> 
> Is this bad cabling?
Nope.

The cisco is set to not autonegotiate and the linux eth port is (correct default for 
most cards).  Just set the cisco port to auto negotiate rate and duplex and the 
problem will go away. 
There are some good guidelines on the cisco site should you need them.
 
Cheers
-Rod




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