To ALL and EVERYONE using Meraki cable testing feature on switch ports, I got confirmation from Meraki support today that this is a KNOWN ISSUE/BUG and development knows about it.  I have been correct all along using physical cable tester showing all pairs are sound, but the Meraki cable test is incorrect showing pair 3 as "short" or "open" when tested against devices connected at 100Mbps or 10Mbps.    Case closed, until Meraki fixes this. ... View more

I understand that have done splits using the same technique.  I am not questioning what pairs are used for what and the basics of ethernet or pairs used for POE.   My question is why does Meraki cable test shows pair 3 as "short" when there is clearly NO short??  If indeed pair 3 isn't used then don't test it but testing it and showing me it's a short is misleading.  This caused me to visit a site and tested over 10 cables for no reason.    ... View more

It IS a brand new cable out of a NEW bag, connected directly to the switch in the same rack, no patch panel involved in between.  In fact, I tried 3 different new cables, with the same result every time.  Every single connection in this company that negotiates that 100 full duplex comes up with pair 3 being "short".  I'd make a fool out myself if I call a certified cabling guy out to test with a $4000 Fluke meter.  I went to one of our branches and tested almost 10 connections showing this state and each connection shows pair 3 having fully terminated properly.  These are either postage machines or APC PDU's with no need to run 1000/full.  But why does the status show "OK" if pair 3 is shown as in short status?  This baffles me completely.  I've done cabling for years and am no stranger to layer 1 punchdowns and terminations, used to do analog phone lines + T1 circuits also.  I don't ever believe Meraki's cable test at this point. ... View more