Poor wireless signal after upgrading from 3.28 to 4.2

RouterOS Wireless Networking
1

I have a ptp wireless backhaul covering 150 miles
each site has 2 433ah boards in the same metal box
2 to 4 R5H cards connected to 32db parabolic dish with weather proof dome.
Currently running ospf on backhaul

Before I upgraded to 4.2 I was getting 15Mbs thru put pretty good just a higher level of latency.
each hop added 5-30ms latency

5ghz 5180 thru 5800
signals were 40-65
quality 85-100% on tx and rx
P Throughput 30000kbps
N Stream Turned on

System was running pretty good but I wanted to get the latency down

After upgrading to 4.2 the connections went to heck
They say they are good but start disconnecting when traffic is ran through them
if I adjust the hw retries to 14 it gets better but sometimes does not respond well.
changed preamble to long and also tried 5ghz turbo and 10mhz with no luck

I have been switching from antenna A to B and it seems to make it a lot better — is there a bug?

2

i tried V4.0 and it’s ok at all.
But when i upgrade to the V4.1, the wireless connection is very bad.

For the V4.2, i just will stand a side and see how’s feedback then only decide upgrade it or not.

3

Thanks for the input – i am going to try 4.0
I have 16 repeaters talking to each other 1/2 are 433 and the other are 600s. 1/2 are working better but they took a lot of work to get them to stay online where before it was easy.
A few wont work at all
signals are -54 on both sides and it wont stay up very long or i get 2-3mb.
Help Mikrotik

4

unfortunately version 4.2 doesnt fix this.

5

Did you try 3.30 with the wireless test package instead?

6

If you have downgraded to v3.x then try out the wireless-test package and compare the results.
Also check the hw-retries setting - try to increase it. email to support with the support ouput files from the old version and then new version when you see the problem happening.

7

Just going to add that a few of my weaker customers become unstable with 4.0. 11mb @ -90 with 3.xx, days uptime, 1mb @ -94 and uptime is minutes with 4.0, but not usable. Everyone with decent signal shows no change. Those that are just on the edge of reliability are no longer stable.

Going from 4.0 to 3.30 on the CPE shows about a 2dB difference in signal levels on the CPE side, marginal difference, but CCQ is around 5% with 4.0, 35% with 3.30 on a foggy night.