On my multiple routerboard AP 411AH in different sites I have many casual disconnections with extensive data loss, cpe distance is into 3 miles.

What is extensive data loss and why I get this message???

Many thanks

Sorry for my bad english!!!

Marco

I have the same problem, I guess its because of low signal

we had this problem in 2.4Ghz with a lot of AP's in the area...noise

Anyone of you have solved?
Is there a really Mikrotik Solution?

improve your client stations.

The Same cpe work fine with other ap

Just from my reading, early versions of ROS 3 show more drops than 2.9. Later versions help with this tremendously.

A good way to see if it is an issue or not is just ping the radio's IP with the -t command and see how many lost packets there are. I was concerned because one of my customers was dropping constantly. Even tho the uptime was usually less than 6 seconds, pings were under 100ms, under 20ms on average, and loss less than 1% over a few hours.

I've gotten the link more stable, and ROS updates seem to have helped, as well as the link got more stable once the trees filled out, which is confusing, but seen over my entire network.

Ok im struggling of same problem, and yes there is tons of noise, however the difference is i used to use a PC on that tower running ROS with a set of cards.
Downgraded to a RB600 , with same ROS version and same cards, now a few of my clients struggle with disconnections!


Note, this wasnt the case with the PC!

switch to 5 ghz

I love answers like this.....


5ghz is used for backbone links and is also extensively used. And how do you suggest i replace all current users? Can imagine that call too the clients...

Sorry you must replace everything you just bought.
Laptop users, get new laptop or fork out thousands of rands for CPE.

Will NOT work

Hi there I have got a problem.
One of my main links is interrupted by something.

The connection drops every so often.

In logs on Bridge side I get the: "disconnected, extensive data loss"
In logs on Station WDS side I get the: "Lost connection, received deauth: class 2 frame received (6)"

The link quality:
tx/rx signal: -72, -71
signal to noise: 24dB (interesting thing sometimes for few seconds this goes up to 59dB)
CCQ no less that 90%/90%
throuput: 23893 (data rates set to 32Mbps)

but sometimes the link quality looks likw that
left side bridge
right side station wds



I also changed the ACK timeout to 30us
Premeble: long
periodic calibration: disabled
as advised to resolve the problem.

I also scanned for other 5Ghz networks. The closest one is 40MHz below mine.
I tried to check different frequencies.
5330
5500
5700
5845 (Now)
Well only in 5330 I had a gap bigger than 40Mhz.
I have the newest stable version on these units 4.3
Both are RB433 with R52 module.

The funniest thing that sometimes, it stops dropping and works for hours, then next thing I check on the morning and LOG is full with that extensive data loss. I tried everything except exchanging hardware, it requires the lift so this will be the last part of elimination process.

There is something in my mind as well, could be the frost affecting? Wet -8 degrees weather? Well it's not affecting other units but maybe something weakened in one of the routerboards/modules.

Dear Sir,

please check setting tx power - mode,is that still default?
I have same problem with yours, rb Rb411r, signal is enough ( -62 db till -69dB ), then I replace RB with PC board, but problem still happen

so, I think problem not from the board, I have read in this forum before that problem become from txpower radio, when no data transmit or receive sometimes drop ( logging: extensive data loss....) because tx power mode setting to default

today I want to make setting
txpower mode=allrated fixed or cardrates
txpower=xx (max)

hope that can solve the problem

thx yos

Dear Sir,

please check setting tx power - mode,is that still default?
I have same problem with yours, rb Rb411r, signal is enough ( -62 db till -69dB ), then I replace RB with PC board, but problem still happen

so, I think problem not from the board, I have read in this forum before that problem become from txpower radio, when no data transmit or receive sometimes drop ( logging: extensive data loss....) because tx power mode setting to default

today I want to make setting
txpower mode=allrated fixed or cardrates
txpower=xx (max)

hope that can solve the problem

thx yos

I know that this is an old post, but I have this problem. What I can do? Have you solved?

I have the same problem

Oh, so do I... It came suddenly, and no hardware were replaced. RouterOS version were 5.25, and it remains on 5.26. 751U-2HnD routerboard.
The distance is very small, 5m max. Had tried different frequencies, checked for noise. CCQ varies from 80% to 100%. And yes, it comes suddenly every day. Some hours it works well, but some hours I see this text lines twice per one minute:and rarely comes the line:Maybe it means the remote device think that connection is active when Routerboard had already a big data loss and disconnected? So... does it mean my router can't hear the remote device sometimes?
Thanks for your consideration!

5m distance could mean that signal is to strong. What is your signal? maybe reduce output power in the AP.

5m distance could mean that signal is to strong. What is your signal? maybe reduce output power in the AP.

Thank you very much! The tx power mode was at "default" state. I had changed it to "all rates fixed" at first, and seen the default value of "Tx power", it was 17dBm. This setting hadn't helped for those disconnects. Then I've changed "tx power mode" to "card rates" and reduced "Tx power" to 12dBm, then 10dBm and at last it 8dBm. Now I see "extensive data loss" message just rarely, maybe twice a day...

5m distance could mean that signal is to strong. What is your signal? maybe reduce output power in the AP.

Hi, the same situation.

2 new tablets (Samsung Tab A), Metal 52AP (3 meters - distance)
First tablet - works fine (Android 9, Android 10)
Second tablet - "disconnected, extensive data loss"

Two days of searching for a problem, and finally got 3 solutions:
1 - Reduce power of wifi
2 - Band - was 2.4gn, when i set to 2.4 bgn (when tablet goes to B - band (block screen for example), it was disconnected!)
3 - increase distance AP - device.

To avoid guesswork, just look at the wireless table "Registration". You will see the signal strength, the SN ratio, the TX rate and RX rate (speed-bandwidth/streams/guard), the CCQuality, the frames/hwframes ratio retransmits needed, ...... . Signal above -30 dBm is too strong, signal below -86 dBm is too weak. If rate drops below bottom supported speed =>" Extensive data loss" disconnect.

"Extensive data loss" also happens if client devices wifi goes in off state.