A lot of disconnections.

RouterOS Beginner Basics
1

Hi,

Hope all is well.

I have this problem of disconnection of devices from wireless AP (wAP ac and cAP ac) and the log says (xx:xx@wlan1: disconnected, extensive data loss).

Kindly help me in this issue and thanks in advance.

Regards,

Nabil Alwan.

2

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3

I deleted from Wireless Forum, Sorry.

4

If you do not provide more details, no one help you.
Just for “disconnected, extensive data loss” can be dozen of problems.

5

Tell me what exact data you want, and I will try to give you.

6

make a file pasting this on terminal:

/export hide-sensitive file=request

open the file with, for example, notepad and CENSORE with * (DO NOT DELETE ANYTHING!!!)
public IP, password, any identifiable data

Double check,

attach the file on forum for review

7

“extensive data loss” - local interface decided to drop connection to remote device because of inability to send data to remote after multiple failures at lowest possible rate. Possible causes - too weak signal, remote device turned off, strong interference, some other RF related issue that makes communication impossible.

Source: https://wiki.mikrotik.com/wiki/Manual:Wireless_Debug_Logs

8

Hi rextended,
It’s just simple configuration as you will see in the attachment, and Yesterday I changed three settings hoping make things better, so far so good:
disconnect-timeout=from 3s to 15s, hw-retries=from 7 to 15, and on-fail-retry-time= from 0.10 s to 1s.

Hi Zacharias,
Thanks for your reply, I will check and reply to you ASAP.
request.rsc (3.3 KB)

9

First of all, upgrade to 6.47.10

then paste this on terminal without omit { }

{
/interface wireless security-profiles set NAF1 authentication-types=wpa2-psk disable-pmkid=yes management-protection=disabled
/interface wireless set wlan1 band=2ghz-g/n disconnect-timeout=3s distance=indoors hw-retries=7 on-fail-retry-time=100ms wmm-support=disabled
/interface list member remove [find where list=WAN]
/ip firewall filter remove [find]
/ip firewall nat remove [find]
}
10

OK, I will do that and let you know.

11

/interface wireless
set [ find default-name=wlan1 ] band=2ghz-b/g/n channel-width=20/40mhz-XX
disabled=no disconnect-timeout=15s distance=indoors frequency=auto
hw-retries=15 installation=outdoor mode=ap-bridge on-fail-retry-time=1s
security-profile=NAF1 ssid=NAF1 wireless-protocol=802.11 wmm-support=
enabled wps-mode=disabled

Well not very well defined this way …

  • avoid 802.11b (as told by rextended)
    -channel-width=20/40mhz-XX . 40 Mhz Wide channel is mostly a problem in 2.4GHz band. And with XX you don’t even control what side the extension channel is on (eg Ce or eC)
    -disconnect=15s … desperate attempt to hold on ! 15 seconds without the ability to send just one packet !?
    -frequency=auto . Here all is open. What will you get? Unpredictable stability!
    -hw-retries=15 … helps to keep up the higher rates longer. The interface rate selection process will respond slowly to worsening conditions with interface rate reductions, but indeed more retries.
    -on-fail-retry-time=1s , this is not helping at all. You only retry every second, instead of 10 times per second.

Check the connection quality. It is in the “registration table”! Check signal strength and SNR. Check interface rate and it’s fluctuations! Do the same for the TX/RX CCQ!
(low CCQ can also be caused by obstructions, like a wall)

But start to observe the environment for a while with “Freq Usage” , and “Snooper”, then select the proper channel avoiding interference based on the observation.

12

Also wpa-psk on “n”, pmkid enabled, management-protection only supported from other mikrotik device (only?), distance must be indoor, not kilometric, useless firewall rules and NAT because all interface are on LAN bridge because is only an AP.

13

Thanks a lot for your help.

I did all of your advices, so far so good.

Regards,

Nabil Alwan.