Hi RouterOs gurus,

I am experiencing a problem. In a point to point link we have the following parameters:

devices=mikrotik 532A
routeros=2.9.35
frequency=5Ghz
signal TX/RX=-62
CCQ TX/RX=61/50
Noise floor=-96
signal to noise=34
overall TX CCQ=0
Ack timeout=112us
NO NSTREAM

In the previous weeks the link was running perfectly with 20-25Mbits in half duplex, but in the last days we are experiencing some problems regarding the bandwidth. It registers at 6Mbits and hence we get around 4Mbits and we don't understand why. Any hint would be appreciated...

The routing protocol is OSPF (routing-test).

Thank you

Have you performed a ping flood test between the two nodes? You want to exercise the link all by itself. If it's dropping packets or varying widely in ping response times, then you probably have a problem with the radio link. The problems can be wide ranging but you can look at hardware failure, antenna misalignment, water in cables, or RF noise. Note that the noise floor measurements reported are not necessarily true in my experience. I've seen the cards report clear air but when we connect a real spectrum analyzer, we see noise.

Hi, what wireless card do you have?
I solved the same problem lowering the output power:
set wlanx tx-power-mode=all-rate-fixed tx-power=xx ( max 30 min 1 ), I had good results with power around 14/17
regards
Alessandro