if there is voltage on the ground then yes it will cause ethernet errors.
On Tue, Mar 31, 2015 at 10:49 AM, Nate Burke <[email protected]> wrote: > I just changed out an ATOM mikrotik to a CCR, and found that it is > Incrementing FCS Errors exactly every 30 seconds on the Ethernet line from > a Trango LYNX. The lynx is powered via DC, so the Data line is clean of > POE. I am using a GIGE-APC Unit on the Ethernet line. > > What I found through testing, was that the FCS Errors only happened when > the GIGE-APC was plugged into the chassis. They happened at exact 30 > second intervals. Because of this I'm guessing that there is something > introduced via the ground that is causing them. If I pull the GIGE-APC out > of the Chassis, the errors stopped, if I plugged it back in, the errors > came back, at the exact same clock points (in my CCR Log, always at 06 and > 36 seconds regardless of the timing of plugging/unplugging). I'm using the > 1U APC chassis, and there are other GIGE-APC, 444APC-HV, and GIGE-POE-APC > units in it. None of the other equipment is plugged into the CCR, so unsure > if it would increment FCS Errors on those. They are all plugged into > RB1100's, and have no errors logged in the mikrotik. > > Any place to start troubleshooting something like this? Would it make > sense that something on the ground plane could cause these Ethernet errors? > > I believe that this is causing some very low level packetloss through the > link, about 1 packet every 5 minutes or so, I'm guessing based on if the > ping falls directly on the error frame. > > Nate > >
