low client signal when upgrade from 3.30 to 4.3

RouterOS Wireless Networking
1

Hi folks…

I’m having problems with client signal (and connection/disconnection issues) when I upgrade my rb’s from 3.30 vrs of Mikrotik to 4.3.

The clients, before the upgrade, have -64, -63 dbm of signal. After the upgrade, have -72,-78,-80 and worst.
Another case is clients that have signal with -54,-56 or -60 dbm of signal and frequently connect and disconnect.

The only way to solve the problem is downgrade the 4.3 version to 3.30 version. When I do this, all the problems disappear.

Another people see this issue in your routerboards?
Thanks for the help

2

3.30 to 4.2 shows some signal difference, not huge, but pretty good difference in CCQ.

Weak customers were unstable, some severely, going back to 3.30 made them rock solid with 8mb throughput in mid to low -90’s.

3

Yep

With the card
DWL-G520 on x86 4.3 version persist the problem
R52H on rb433 bootloader 2.23 mikrotik 4.3 we have problems too.

Very strange.

4

See your problem explained here http://forum.mikrotik.com/t/huge-problem-extensive-data-loss-3-30-4-2/32775/1

5

Nothing to do with my results. I don’t use Nstreme now. I haven’t for awhile.

6

But the problem isn`t in nstreme! I use this cards to my 2.4 clients.

The problem is with my clientes, don’t in my point-to-point connections

7

Any comment on this from MT?

Is this on the agenda to be improved or is this simply a trade off with the new drivers?

I had to downgrade another customer today. 3.22 was up for weeks on end with a -85 signal, connecting at 36mb or better. Upgraded to 4.0, ran stable for awhile, got really slow today, -85 to -89 signal, dial up speeds throughput. Downgraded to 3.30, system is back up and running, stable and fast again.

8

Try the following:

  1. lock the datarate to 6Mbit and see if the signal changes.
  2. if that doesn’t help, downgrade to v3.30 and install wireless-test package. Is the problem the same? wireless-test in v3.30 is the same package as wireless in v4.3, so we will find if this is in fact a problem with the new wireless package.
9

I will try that this afternoon and post results.

edit: using B/G mode, these clients will rarely ever connect with G mode once I upgrade to 4.x. B only.

10

So far, downgrading to 3.30 and using wireless test works almost exactly the same as 3.30 with the benefit of cts/rts.

Signal levels are staying the same as 3.30, reliability seems ok, short term testing only.

Two of these customers were nearly unusable immediately after upgrading to 4.0 or 4.3, 3.30 w/test works just as well as 3.30.

11

That radio are you used?

12

Does wireless-test of 3.30 have 802.11N drivers to i made a test with nstream and 802.11N in 3.30 ???

BR

13

plese lock the data-rates using rate-set=configured of the wireless card on the AP for example to 6Mbps and then compare the results from v3.30 with wireless-test and from v4.3 or v4.0. Please make the support output file from both versions and send to support@mikrotik.com

14

I’m having issues as well. I’ve noticed a significant signal drop, I’m using XR9 cards.

15

Using XR9, 411R and Crossroads, all show the same.

I’ll try to get a test unit to replicate the problem here and submit a supout.

16

please try what uldis suggested about the rates

17

Using B/G mode 20MHz, lock to 6mb and it won’t connect. I may be doing something wrong there.

Radio sitting at ground level, turned for weak signal, not moved between tests, bandwidth test to speakeasy.net, highest of 3 tests per ROS version. The results really surprised me as I’ve had better results with 3.30 test in the field than 4.3. I hadn’t really noticed a difference between 3.30 and 3.30 test.

4.3 bandwidth test 1263kbps down 197kbps up -90/-88

3.30 test bandwidth test 1058kbps down 107kbps up -90/-90

3.30 bandwidth test 2676kbps down 620kbps -92/-89

I have emailed supout to MT support as well as these bandwidth tests results.

18

Upgrade for new version (4.4) and still persist problem.

I use the cards only in B mode, won`t in B/G. In my case, fix the rate in 6 Mbps is only possible if I use the B/G mode.

I try to fix the speed to 1/2/5.5 and/or 11 Mbps, but the problem persist.

Downgrading the version again.

19

In other words, 4.4 continues useless for many people… :frowning: :frowning: :frowning:

BR

20

The last recommendation by Mikrotik support said to disable encryption and disable all B modes on the AP and the client, which I can’t do on an operating tower.

I’ve got some spare parts I can put together to test with, but at the end of the day, I’m using 3.30 and 4.x isn’t stable on roughly a dozen customers with signals varying from -85 to -95.

It is hard to recreate in lab conditions as distance is apparently a factor as well. My test CPE is close to the tower and did not have the exact same issues as my customers did.