WS-6 mini to WS-12-250 DC POE and Gigabit connectivity issue

[CBORG]

Hello.

I have done a cursory search of the forum, and I can't find a discussion on this. Forgive me if I'm asking a question that has already been answered.


I have a remote installation where a WS-12-250 DC is to provide POE and connect to a WS-6 mini using the 48V H/V POE and a gigabit connection.

I have tried on multiple WS-12-250's and multiple WS-6's, and I can't get a gigabit connection. POE works fine. When I set both sides to 10/100 Auto, I get a connection.

Gigabit is working fine on all other ports - both switches.

I have tried using a short jumper as well with the two switches located right next to each other - so no ground loop issue, no cabling issue.

Any suggestions on how to get Gigabit speed and 48V H/W working between these two models?

Thanks.

[Julian]

it.. does work, unless you have a blown pair or bad terminations or/or/or as far as wiring goes?

skipping the t568a/b debate for now; you sound like you've checked that probably a few times and it really doesn't matter as long as both ends are the same

Start with banjoing the powering port, you need 1.7v(ish) quiescent pair-to-pair, 48 obvs. with the fets on; there's a full post somewhere about that, but anything outside of this means smoke has escaped and you'll need the link mentioned later;

Take a look at the mini port's teeth: sometimes they'll get water; if it's brown, send it down: rma.netonix.com/rma_create/, pretty common one, you don't really think of drip loops in the cables until you have to

How much is the mini pushing, wattage wise? is the load 48 or 24 (efficiency differs btwn the 2)?