Re: networking errors, what do they mean?

[Camaleón <noelamac@gmail.com>]

On Fri, 11 May 2012 14:33:27 +0100, Shaun wrote:

> Background.
> 
> I have a machine with two NIC interfaces. I run them in a bond (failover
> mode).  I then have a bridging interface, br0, which uses bond0.
> 
> The bond0 is showing errors in ifconfig -a.
> 
> bond0     Link encap:Ethernet  HWaddr b8:ad:6f:92:eb:c3
>           inet6 addr: fe80::baac:6eff:fe92:ebc3/64 Scope:Link UP
>           BROADCAST RUNNING MASTER MULTICAST  MTU:1500  Metric:1 RX
>           packets:4445581 errors:0 dropped:0 overruns:0 frame:0 TX
>           packets:1487769 errors:1084 dropped:0 overruns:0 carrier:1084
>           collisions:2657 txqueuelen:0
>           RX bytes:423232914 (403.6 MiB)  TX bytes:389781613 (371.7 MiB)
> 
> If I look at the slave devices eth1 shows no errors whereas eth0 does.
> Not too surprising ass the active slave is currently eth0.

A couple of articles talking about transmission errors:

http://www.johnnypez.com/linux/ifconfig-eth0-shows-packet-errors/
http://www.linuxweblog.com/ifconfig-packet-errors
 
> br0 is used by various KVM VMs all with static IPs.  My question is I've
> not noticed any untoward misbehaviour of any networked services.  But is
> this something I should worry about/investigate. And if so how?

While the amount of packet errors is not very high (1084) it's something 
to watch :-?

Greetings,

-- 
Camaleón