Strong signal, high CCQ, high ping or no at all!

RouterOS Wireless Networking
1

Howdy everybody,
I’m running a small WISP for a year now, I have 3 90 degree sector antennas with 435g board for each.
This system was functioning pretty awesome since a week ago.

***[]As I mentioned strong signal, high CCQ[/b]
***[]Low CCQ on some devices is because they were recently rebooted[/b]

***[]Noise Floor[/b]

***[]And this is the ping to one[/b]




[]There is no noise on the frequencies and they are pretty clean -90.
[]When there’s only one or two clients on sectors, ping is normal, but it still affects bandwidth test.
[]This happens most time of the day, but it comes back to normal too.
[]There is no load and traffic on sectors at the time of the problem.
[*]My guess is signal jammers, but it’s strange cause all sectors with different frequencies goes down at the same time.


Any help is highly appreciated.

2

Change your base RB to a 493G or 433GL - the board you are running has known stability issues :slight_smile:

3

I also did test with RB433AH, but the same outcome.

4

Okay. What protocol are you using?

5

I’m using NV2. I tested with Nstreme too, same result.

6

The signals and ccq of all clients are excellent. There should be no problems, but maybe post wirelss config.
Also why are all clients on 19.5mbit/s, are they limited to that rate ?

7

Yes, I limited the data rates on MCS2.

set [ find default-name=wlan1 ] adaptive-noise-immunity=ap-and-client-mode band=5ghz-onlyn basic-rates-a/g="" basic-rates-b="" default-forwarding=no disabled=no \
    frequency=5450 frequency-mode=superchannel ht-basic-mcs=mcs-0 ht-rxchains=0,1 ht-supported-mcs=\
    mcs-0,mcs-1,mcs-2,mcs-16,mcs-17,mcs-18,mcs-19,mcs-20,mcs-21,mcs-22,mcs-23 ht-txchains=0,1 l2mtu=2290 mode=ap-bridge nv2-preshared-key=XXXXXXX nv2-security=enabled \
    radio-name=XXXXXXX rate-set=configured supported-rates-a/g="" supported-rates-b="" wireless-protocol=nv2

It’s good to mention this is the config I’ve been using for the last year with no problem.

8

I am looking at it and it just looks impossible to be that bad with these screenshots. Also you mention the exact same thing happens to other sector antennas. Normally I’d say it’s noise if you have more antennas close to each other, but this will be seen on the ccq as it will be low.
Have you tried searching the problem elsewhere in the network ? Broadcast traffic, loop, switch with full mac table etc .. ?

9

Someone else mentioned loop too.
But loop affects whole network. I have customers attached to same switch with no problem.
I’m also using bridge firewall on each sector, allowing arp only between clients and server. For test purposes I disabled them too but no help.

10

Try a torch on the wireless interface to check for traffic not intended to go through the interface.

11

I found the problem and it’s a little funny.
I also had a grid antenna for my longer distance clients (and they were the most important).
The harmful packets was coming from one of these customers, and since the customers on grid had no problem, I left them untouched :frowning:
The reason the customers on grid didn’t had the same problem as sectors, was because I disabled default forwarding on it, so the evil client couldn’t touch other clients on grid.
I really appreciate your replies and thanks.

12

I am also facing the same problem, please let me know how to find out the bad packets coming from the customer.