Bring out the Holy Hand ...oops bring out the voltmeter and see what you get. Compare to non affected lines. Ground isolation is a science all to itself
Jaime Solorza On Mar 31, 2015 11:04 AM, "Sean Heskett" <[email protected]> wrote: > 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 >> >> >
