[Lerftest-ctrls] Issue with LLRF-CPU networking

[Sonya Hoobler]

Hi again,

Larry called and repoted that the interface seemed to be down again and, 
indeed, eth0 no longer appeared in ifconfig.

*Larry*, do you know if anything was power-cycled or disconnected before 
you found the problem? That info would help for our troubleshooting.

*Hugo*, have you encountered this before? This is not the first time I've 
found eth0 missing for these systems, but since I'm remote and not fully 
aware of what is happening locally, I have not yet tried to troubleshoot 
it.

Thanks everyone,
   Sonya



On Wed, 12 Sep 2018, Sonya Hoobler wrote:

> Hi Wesley,
>
> The ifconfig eth0 was not set (which is odd but I believe I have seen this 
> before). I have set it and it should be working now.
>
> Sonya
>
>
> On Wed, 12 Sep 2018, Wesley Moore wrote:
>
>> Sonya,
>> 
>> 
>> Larry is seeing a comm issue from lcls-llrfcpu01 to the rack's switch. 
>> Port 1 on the cpu appears inactive/dead (pic 1).  This results in the 
>> uplink in the rack being down (pic 2).  Larry moved from Port 1 to another 
>> port up and saw the uplink briefly.  So it's believed that everything 
>> downstream of cpu01 is fine.  Please advise.
>> 
>> 
>> # pic 1: lcls-llrfcpu01, port 1 inactive.
>> 
>> [cid:1ffd57f5-4469-41d5-885a-0ba16ff448a9]
>> 
>> 
>> # pic 2: LLRF rack switch, all lights on left are solid, uplink on 
>> far-right is inactive.
>> 
>> [cid:7cd84393-99e7-4dab-a88d-8bedc95f7115]
>> 
>> 
>> Wesley
>> 
>