Ethernet Errors

[Doug Hardie]

> On 11 October 2015, at 06:39, Terje Elde <terje at elde.net> wrote:
> 
> On 11. okt. 2015, at 12:14, Doug Hardie <bc979 at lafn.org> wrote:
> 
>> Any ideas?
> 
> Seems you ruled out a lot of things. I'm wondering if it could be PSU or EMI?
> 
> Also, is the asymetry in errors based on number of errors, or percentage of errors of total packets in the direction?
> 
> Could the difference be explained by one interface receicing more, and the other sending more, and the error percentage thus being about the same?
> 
>> Unfortunately these servers are a 3 hour drive away at 1 AM.  It’s considerably longer during the day as I have to drive through Los Angeles.
> 
> Next time you're there, probably doesn't hurt to check the wiring. Do both run close to anything magnetic, such as PSUs, wall warts etc?
> 
> Oh, and in situations like these, I try to work in a habit of taking pictures. Nice to have as a reference, without having to visit. 

The input on one NIC has more packets in error and fewer total packets.  The output has more total packets and fewer error packets.  The same holds for the other NIC.  There are several orders of magnitude in the percentages.  The cables are something I didn’t think about.  I will have them changed and see if that affects anything.