Lots of reassotiations

RouterOS Wireless Networking
1

Hello. I am running small indoors network RB751G-2HnD.

From time to time, I getting all of our clients disconnected and re-connected back. Over and over again.

Here is an example :

12:46:10 wireless,info 10:0B:A9:38:76:B0@xxl2: reassociating 
12:46:10 wireless,info 10:0B:A9:38:76:B0@xxl2: disconnected, ok 
12:46:10 wireless,info 10:0B:A9:38:76:B0@xxl2: connected 
12:46:15 wireless,info 10:0B:A9:38:76:B0@xxl2: reassociating 
12:46:15 wireless,info 10:0B:A9:38:76:B0@xxl2: disconnected, ok 
12:46:15 wireless,info 10:0B:A9:38:76:B0@xxl2: connected 
12:46:20 wireless,info 10:0B:A9:38:76:B0@xxl2: reassociating 
12:46:20 wireless,info 10:0B:A9:38:76:B0@xxl2: disconnected, ok 
12:46:20 wireless,info 10:0B:A9:38:76:B0@xxl2: connected

This is Intel 6205 client, which is located in just a 5 meters straight view from AP.
Most valuable parameters for this client : Roaming Aggressiveness : Medium. Transmit power : Highest.

Here goes interface configuration.

Flags: X - disabled, R - running 
 0  R name="xxl2" mtu=1500 mac-address=D4:CA:6D:2A:0B:F7 arp=enabled disable-running-check=no interface-type=Atheros AR92xx 
      radio-name="D4CA6D2A0BF7" mode=ap-bridge ssid="xxl2" area="" frequency-mode=manual-txpower country=no_country_set 
      antenna-gain=0 frequency=ch3 band=2ghz-b/g/n channel-width=20/40mhz-ht-above scan-list=default wireless-protocol=802.11 
      rate-set=configured supported-rates-b="" supported-rates-a/g=6Mbps,9Mbps,12Mbps,18Mbps,24Mbps,36Mbps,48Mbps,54Mbps 
      basic-rates-b="" basic-rates-a/g=6Mbps max-station-count=2007 distance=indoors tx-power=10 tx-power-mode=all-rates-fixed 
      noise-floor-threshold=default nv2-noise-floor-offset=default periodic-calibration=enabled periodic-calibration-interval=60 
      dfs-mode=none antenna-mode=ant-a wds-mode=disabled wds-default-bridge=none wds-default-cost=100 wds-cost-range=50-150 
      wds-ignore-ssid=no update-stats-interval=disabled bridge-mode=enabled default-authentication=yes default-forwarding=yes 
      default-ap-tx-limit=0 default-client-tx-limit=0 proprietary-extensions=post-2.9.25 wmm-support=disabled hide-ssid=no 
      security-profile=default disconnect-timeout=10s on-fail-retry-time=100ms preamble-mode=both compression=no 
      allow-sharedkey=no station-bridge-clone-mac=00:00:00:00:00:00 ht-ampdu-priorities=0,1,2,3,4,5,6,7 ht-guard-interval=any 
      ht-supported-mcs=mcs-0,mcs-1,mcs-2,mcs-3,mcs-4,mcs-5,mcs-6,mcs-7,mcs-8,mcs-9,mcs-10,mcs-11,mcs-12,mcs-13,mcs-14,mcs-15,mcs-
                 16,mcs-17,mcs-18,mcs-19,mcs-20,mcs-21,mcs-22,mcs-23 
      ht-basic-mcs="" ht-txchains=0,1 ht-rxchains=0,1 ht-amsdu-limit=8192 ht-amsdu-threshold=8192 tdma-period-size=2 
      nv2-queue-count=2 nv2-qos=default nv2-cell-radius=30 nv2-security=disabled nv2-preshared-key="" hw-retries=7 
      frame-lifetime=0 adaptive-noise-immunity=ap-and-client-mode hw-fragmentation-threshold=disabled hw-protection-mode=rts-cts 
      hw-protection-threshold=0 frequency-offset=0 rate-selection=advanced multicast-helper=default multicast-buffering=enabled

Anyone help please. How to solve those disconnects? Thanks.

2

start with this command “/interface wirelesss reset” and don’t change any settings except mode (ap-bridge)
What device is that client, PC? Maybe it is going to sleep, or some power saving is activated? Or does this happen during normal browsing?

Enable wireless debug logs:
[admin@MikroTik] system logging> add topics=wireless,debug action=memorymore info http://wiki.mikrotik.com/wiki/Manual:Wireless_Debug_Logs

3

Thanks. I have reset it and found that 40MHz gives me 10Mbps bandwidth, but 20MHz giving 40Mbps. So I am running 20MHz now - will see how it will behave.
There is another problem I have found.
Mikrotik detects distance to station as 1-2Km, but all of them are in 20 meters.

4

you can set distance=indoors, this could also give a small improvement