QRT 5 ac

Hardware MikroTik hardware general
1

Hi

I have build up some network with Mikrotik. But ran into one problem.

I have 2 QRT 5 AC, and they should have 1gb eth network. But when I try to force them to go for 1gb, they lose connection. They only want to use 10o mbit

Yes, they are connected to other gb harware:
antenna one is connected to a CRS125-24G-1S-2HnD the other antenne is connectet to a RB260GSP

I have updated both antenna with routerOS 6.34, but in still dont want to use 1gb on Ethernet.
Also tryed another antenna (SXT G-5HPacD) and it worked with gb.

Any idea what to do?

2

Check the length and quality of cable between your devices.

3

Have you tested the ethernet line you are trying to use at each location? Could it maybe be miswired, e.g. T568A on one end and T568B on the other?

4

Hi, did you get this resolved? I have the same problem (also QRT 5 AC, also not negotiating 1G Ethernet speed).
I have also tried different cables, and different peer devices (both a Mikrotik router and a dumb Gigabit switch).

5

You can’t force Gigabit connections. You have to let them auto negotiate up to Gigabit speeds. Cables must be Cat5e or Cat6.

Tom

6

Do you use the proper gigabit power injectors? Using regular injectors will limit you to 100 mbps since they don’t offer all 4 cable pairs for data transport. Of course, the autonegociation is also needed, as stated by roc-noc.
At least the 260GSP should power it up correctly at 1Gbps, if cabling is correct. Also the competiton’s edgeswitch works properly (verified).

7

If You use Gigapit POE - please try with another. Sometime poe injectors falls

8

fwiw this solved my version of the problem (link flaps between 1G and 100M regardless of cable used).
Replaced the poe injector with another one and the problem went away.

9

Some Gbit injectors from MT don’t work as it should.

10

woudnt a flap cause power loss on the qrt5 ?

i have same issue eth1 flapping on qrt5 to the cisco sg350x switch.. cant figure out why…

flaps every 3-5 hours for 10 minutes str8… then settles for another 3-5 hours.

11

could it be bridge loop protection ?
either from cisco or mikrotik side.
can you put switch between them so you can debug from which side port flap occurs ?