Wi-Fi on MikroTik RB2011UAS-2HnD-IN

RouterOS Wireless Networking
1

Hi

i have very strange problems with wi-fi (on mobile devices only - 2x ipad, iphone 4, and atrix2)
no such problems with my old ASUS-520GC
and no such problems with my laptop

here they are:

=============================================

-> ipad (44:2A:60:6C:48:39@wlan1) -> connection
is on, but nothing work; disconnects sometimes
distance is about 0

21:04:38 wireless,info 44:2A:60:6C:48:39@wlan1: disconnected, extensive data loss
21:05:07 wireless,info wlan1: data from unknown device 44:2A:60:6C:48:39, sent dea
uth
21:05:09 wireless,info 44:2A:60:6C:48:39@wlan1: connected
21:05:29 system,info,account user admin logged in via winbox
21:06:00 wireless,info 44:2A:60:6C:48:39@wlan1: disconnected, extensive data loss
21:06:18 wireless,info wlan1: data from unknown device 44:2A:60:6C:48:39, sent dea
uth
21:06:18 wireless,info 44:2A:60:6C:48:39@wlan1: connected
21:06:19 wireless,info 44:2A:60:6C:48:39@wlan1: disconnected, received deauth: sen
ding station leaving (3)
21:06:19 wireless,info 44:2A:60:6C:48:39@wlan1: connected
21:06:24 wireless,info 44:2A:60:6C:48:39@wlan1: disconnected, unicast key exchange
timeout
21:06:25 wireless,info 44:2A:60:6C:48:39@wlan1: connected
21:07:02 system,info wireless sniffer settings changed by admin
21:07:07 wireless,info 34:51:C9:2C:40:32@wlan1: disconnected, disabling
21:07:07 wireless,info 44:2A:60:6C:48:39@wlan1: disconnected, disabling
21:07:07 wireless,info E0:CA:94:AD:C6:AA@wlan1: disconnected, disabling
21:07:24 wireless,info E0:CA:94:AD:C6:AA@wlan1: connected
21:07:27 wireless,info 34:51:C9:2C:40:32@wlan1: connected
21:07:28 wireless,info 34:51:C9:2C:40:32@wlan1: disconnected, received disassoc: s
ending station leaving (8)
21:08:43 wireless,info 3C:43:8E:D0:FE:27@wlan1: connected
21:09:01 wireless,info 44:2A:60:6C:48:39@wlan1: connected
21:09:32 wireless,info 3C:43:8E:D0:FE:27@wlan1: disconnected, received deauth: sen
ding station leaving (3)
21:11:32 dhcp,info default deassigned 192.168.88.8 from 44:2A:60:6C:48:39
21:11:34 dhcp,info default assigned 192.168.88.8 to 44:2A:60:6C:48:39
21:12:24 wireless,info 44:2A:60:6C:48:39@wlan1: disconnected, group key exchange t
imeout
21:12:25 wireless,info 44:2A:60:6C:48:39@wlan1: connected
21:12:30 wireless,info 44:2A:60:6C:48:39@wlan1: disconnected, unicast key exchange
timeout
21:12:30 wireless,info wlan1: data from unknown device 44:2A:60:6C:48:39, sent dea
uth

\

-> motorola atrix 2 (3C:43:8E:D0:FE:27@wlan) -> Wifi works, but..
distance is about 0

[admin@MikroTik] > ping 192.168.88.6
HOST SIZE TTL TIME STATUS
192.168.88.6 timeout
192.168.88.6 timeout
192.168.88.6 timeout
192.168.88.6 timeout
192.168.88.6 timeout
192.168.88.6 timeout
192.168.88.6 56 64 883ms
192.168.88.6 56 64 480ms
192.168.88.6 timeout
192.168.88.6 timeout
192.168.88.6 timeout
192.168.88.6 timeout
192.168.88.6 56 64 576ms
192.168.88.6 timeout
192.168.88.6 timeout
192.168.88.6 timeout
192.168.88.6 56 64 782ms
sent=17 received=4 packet-loss=76% min-rtt=480ms avg-rtt=680ms max-rtt=883ms


21:41:42 wireless,info 3C:43:8E:D0:FE:27@wlan1: connected
21:47:17 wireless,info 3C:43:8E:D0:FE:27@wlan1: reassociating
21:47:17 wireless,info 3C:43:8E:D0:FE:27@wlan1: disconnected, ok
21:47:17 wireless,info 3C:43:8E:D0:FE:27@wlan1: connected
21:52:45 wireless,info 3C:43:8E:D0:FE:27@wlan1: reassociating
21:52:45 wireless,info 3C:43:8E:D0:FE:27@wlan1: disconnected, ok
21:52:45 wireless,info 3C:43:8E:D0:FE:27@wlan1: connected
21:53:59 wireless,info 3C:43:8E:D0:FE:27@wlan1: reassociating
21:53:59 wireless,info 3C:43:8E:D0:FE:27@wlan1: disconnected, ok
21:53:59 wireless,info 3C:43:8E:D0:FE:27@wlan1: connected
21:54:44 wireless,info 3C:43:8E:D0:FE:27@wlan1: reassociating
21:54:44 wireless,info 3C:43:8E:D0:FE:27@wlan1: disconnected, ok
21:54:44 wireless,info 3C:43:8E:D0:FE:27@wlan1: connected
21:56:07 wireless,info 3C:43:8E:D0:FE:27@wlan1: reassociating
21:56:07 wireless,info 3C:43:8E:D0:FE:27@wlan1: disconnected, ok
21:56:07 wireless,info 3C:43:8E:D0:FE:27@wlan1: connected
21:56:50 wireless,info 3C:43:8E:D0:FE:27@wlan1: reassociating
21:56:50 wireless,info 3C:43:8E:D0:FE:27@wlan1: disconnected, ok
21:56:50 wireless,info 3C:43:8E:D0:FE:27@wlan1: connected
21:57:08 wireless,info 3C:43:8E:D0:FE:27@wlan1: disconnected, received deauth: sending station leaving (3)
22:00:51 wireless,info 3C:43:8E:D0:FE:27@wlan1: connected

\



Config

[admin@MikroTik] > interface wireless print advanced
Flags: X - disabled, R - running
0 R name="wlan1" mtu=1500 mac-address=D4:CA:6D:4A:D8:CB arp=enabled disable-running-check=no interface-type=Atheros AR9300 radio-name="D4CA6D4AD8CB" mode=ap-bridge ssid="123" area=""
frequency-mode=manual-txpower country=russia antenna-gain=0 frequency=2422 band=2ghz-b/g/n channel-width=20mhz 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-mode=default noise-floor-threshold=default nv2-noise-floor-offset=default periodic-calibration=enabled periodic-calibration-interval=60 dfs-mode=none 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=3s 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
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=mcs-0,mcs-1,mcs-2,mcs-3,mcs-4,mcs-5,mcs-6,mcs-7 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=none hw-fragmentation-threshold=disabled
hw-protection-mode=none hw-protection-threshold=0 frequency-offset=0 rate-selection=advanced multicast-helper=default


[admin@MikroTik] > interface wireless security-profiles print
Flags: * - default
0 * name="default" mode=dynamic-keys authentication-types=wpa2-psk unicast-ciphers=aes-ccm group-ciphers=aes-ccm wpa-pre-shared-key="Alex2085" wpa2-pre-shared-key="Alex2085"
supplicant-identity="MikroTik" eap-methods=passthrough tls-mode=no-certificates tls-certificate=none static-algo-0=none static-key-0="" static-algo-1=none static-key-1=""
static-algo-2=none static-key-2="" static-algo-3=none static-key-3="" static-transmit-key=key-0 static-sta-private-algo=none static-sta-private-key=""
radius-mac-authentication=no radius-mac-accounting=no radius-eap-accounting=no interim-update=0s radius-mac-format=XX:XX:XX:XX:XX:XX radius-mac-mode=as-username
radius-mac-caching=disabled group-key-update=5m management-protection=disabled management-protection-key=""



Any change to debug and fix it ?

2

new funny log with wifi debug

00:32:05 wireless,debug wlan1: 34:51:C9:2C:40:32 attempts to associate
00:32:05 wireless,debug wlan1: 34:51:C9:2C:40:32 not in local ACL, by default accept
00:32:05 wireless,info 34:51:C9:2C:40:32@wlan1: connected
00:40:34 wireless,debug wlan1: 3C:43:8E:D0:FE:27 attempts to associate
00:40:34 wireless,info 3C:43:8E:D0:FE:27@wlan1: reassociating
00:40:34 wireless,info 3C:43:8E:D0:FE:27@wlan1: disconnected, ok
00:40:34 wireless,debug wlan1: 3C:43:8E:D0:FE:27 not in local ACL, by default accept
00:40:34 wireless,info 3C:43:8E:D0:FE:27@wlan1: connected
00:42:47 wireless,info 34:51:C9:2C:40:32@wlan1: disconnected, disabling
00:42:47 wireless,info 3C:43:8E:D0:FE:27@wlan1: disconnected, disabling
00:42:47 wireless,info 44:2A:60:6C:48:39@wlan1: disconnected, disabling
00:42:50 wireless,info wlan1: data from unknown device 34:51:C9:2C:40:32, sent deauth
00:42:50 wireless,info wlan1: data from unknown device 34:51:C9:2C:40:32, sent deauth
00:42:50 wireless,info wlan1: data from unknown device 44:2A:60:6C:48:39, sent deauth
00:42:50 wireless,info wlan1: data from unknown device 44:2A:60:6C:48:39, sent deauth
00:42:51 wireless,debug wlan1: 44:2A:60:6C:48:39 attempts to associate
00:42:51 wireless,debug wlan1: 44:2A:60:6C:48:39 not in local ACL, by default accept
00:42:51 wireless,info 44:2A:60:6C:48:39@wlan1: connected
00:42:52 wireless,debug wlan1: 34:51:C9:2C:40:32 attempts to associate
00:42:52 wireless,debug wlan1: 34:51:C9:2C:40:32 not in local ACL, by default accept
00:42:52 wireless,info 34:51:C9:2C:40:32@wlan1: connected
00:42:56 wireless,info 34:51:C9:2C:40:32@wlan1: disconnected, disabling
00:42:56 wireless,info 44:2A:60:6C:48:39@wlan1: disconnected, disabling
00:43:24 wireless,debug wlan1: 3C:43:8E:D0:FE:27 attempts to associate
00:43:24 wireless,debug wlan1: 3C:43:8E:D0:FE:27 not in local ACL, by default accept
00:43:24 wireless,info 3C:43:8E:D0:FE:27@wlan1: connected
00:43:30 wireless,debug wlan1: 44:2A:60:6C:48:39 attempts to associate
00:43:30 wireless,debug wlan1: 44:2A:60:6C:48:39 not in local ACL, by default accept
00:43:30 wireless,info 44:2A:60:6C:48:39@wlan1: connected

i have no idea…

3

Hi guys,

I have the same problem which explain by Igor.

someone has any ideia we can fix that.

4

try

/interface wireless set numbers=0 ht-ampdu-priorities=0,1,2,3,4,5,6,7
5

I would not recommend this as it will increase latency.

Post your config so we can take a look.
/export compact

6

Problem fixed in 5.24rc1 ( or i am just lucky ?)

you can get pre-release build here: http://www.mikrotik.com/download/share/all_files_5.24rc1.zip

also

Also set the distance setting to indoors and enable the Chain1 operations as
currently you have enabled only chain0.

7

I’m still having this problem with 5.24. Same model Mikrotik as well.

I get the “group key exchange timeout” in the log when it occurs and all wifi clients are unable to communicate for a few minutes before it resumes normal operation by itself.

8

Another thread with the same problem on this model Mikrotik.

http://forum.mikrotik.com/t/wireless-disconnected-group-key-exchange-timeout/62146/1

I’m waiting for mine to act up again with wireless debug on to see if it offers any more details.

9

Set the rate-set=default and test again.
Also how are the antennas aligned, we suggest to place on horizontal and one vertical?
Could you check if the problem goes aways if you disable the power saving on the wireless clients?

10

It is not the same. The other topic has AES problem, already fixed in newer RouterOS release

11

Could you guys clarify more exactly what devices are the clients ? I understand that they are iPad, iPhone 4 and Motorola Atrix, but please give also specific iOS version number and release date or serial. For apple devices you can use this link to get specific model number http://support.apple.com/specs/

12

Rates set to default. I will sees if it happens again. It can take several hours before it acts up.

The antennas are both positioned vertically, I will adjust one of them.

I’ve tried disabling the power saving feature, but it doesn’t seem to have any effect. All WiFi clients seem to lose connectivity at the same time.

Thanks for the reply.

13

I have two Samsung Galaxy S3 Android phones, running version 4.1. An iPad running iOS 6.0.1. A Brother HL-2270DW. A Macbook Air circa 2012, running Mountain Lion OS X 10.8.

14 
mar/26 19:30:53 wireless,info 38:AA:3C:93:47:A0@wlan1: disconnected, group key exchange timeout
mar/26 19:30:53 wireless,info wlan1: data from unknown device 38:AA:3C:93:47:A0, sent deauth
mar/26 19:30:57 wireless,info 38:AA:3C:93:47:A0@wlan1: connected

Same problem here.
Device: RB2011UAS-2HnD-IN
Version: 5.24

Mobile device: Samsung Note 2 (GT-N7105 Android Version: 4.12, build number: JZO54K.N7105ZHDMB1)

15

I have a similar problem with a Macbook Pro (OSX 10.8.3) and RB 411U with R52 wireless card:

23:51:42 wireless,info 40:B3:95:F2:1C:47@wlan1: connected 
23:51:43 wireless,info 40:B3:95:F2:1C:47@wlan1: reassociating 
23:51:43 wireless,info 40:B3:95:F2:1C:47@wlan1: disconnected, ok 
23:51:43 wireless,info 40:B3:95:F2:1C:47@wlan1: connected 
23:51:43 wireless,info 40:B3:95:F2:1C:47@wlan1: reassociating 
23:51:43 wireless,info 40:B3:95:F2:1C:47@wlan1: disconnected, ok 
23:51:43 wireless,info 40:B3:95:F2:1C:47@wlan1: connected 
23:51:43 wireless,info 40:B3:95:F2:1C:47@wlan1: reassociating 
23:51:43 wireless,info 40:B3:95:F2:1C:47@wlan1: disconnected, ok 
23:51:43 wireless,info 40:B3:95:F2:1C:47@wlan1: connected 
23:51:43 wireless,info 40:B3:95:F2:1C:47@wlan1: reassociating 
23:51:43 wireless,info 40:B3:95:F2:1C:47@wlan1: disconnected, ok 
23:51:43 wireless,info 40:B3:95:F2:1C:47@wlan1: connected 
23:51:43 wireless,info 40:B3:95:F2:1C:47@wlan1: reassociating 
23:51:43 wireless,info 40:B3:95:F2:1C:47@wlan1: disconnected, ok 
23:51:43 wireless,info 40:B3:95:F2:1C:47@wlan1: connected 
23:51:44 wireless,info 40:B3:95:F2:1C:47@wlan1: reassociating 
23:51:44 wireless,info 40:B3:95:F2:1C:47@wlan1: disconnected, ok 
23:51:44 wireless,info 40:B3:95:F2:1C:47@wlan1: connected 
23:51:44 wireless,info 40:B3:95:F2:1C:47@wlan1: reassociating 
23:51:44 wireless,info 40:B3:95:F2:1C:47@wlan1: disconnected, ok 
23:51:44 wireless,info 40:B3:95:F2:1C:47@wlan1: connected 
23:51:44 wireless,info 40:B3:95:F2:1C:47@wlan1: reassociating 
23:51:44 wireless,info 40:B3:95:F2:1C:47@wlan1: disconnected, ok 
23:51:44 wireless,info 40:B3:95:F2:1C:47@wlan1: connected 
23:51:44 wireless,info 40:B3:95:F2:1C:47@wlan1: reassociating 
23:51:44 wireless,info 40:B3:95:F2:1C:47@wlan1: disconnected, ok 
23:51:44 wireless,info 40:B3:95:F2:1C:47@wlan1: connected 
23:51:44 wireless,info 40:B3:95:F2:1C:47@wlan1: reassociating 
23:51:44 wireless,info 40:B3:95:F2:1C:47@wlan1: disconnected, ok 
23:51:44 wireless,info 40:B3:95:F2:1C:47@wlan1: connected 
23:51:44 wireless,info 40:B3:95:F2:1C:47@wlan1: reassociating 
23:51:44 wireless,info 40:B3:95:F2:1C:47@wlan1: disconnected, ok 
23:51:44 wireless,info 40:B3:95:F2:1C:47@wlan1: connected 
23:51:44 wireless,info 40:B3:95:F2:1C:47@wlan1: reassociating 
23:51:44 wireless,info 40:B3:95:F2:1C:47@wlan1: disconnected, ok 
23:51:44 wireless,info 40:B3:95:F2:1C:47@wlan1: connected 
23:51:45 wireless,info 40:B3:95:F2:1C:47@wlan1: reassociating 
23:51:45 wireless,info 40:B3:95:F2:1C:47@wlan1: disconnected, ok 
23:51:45 wireless,info 40:B3:95:F2:1C:47@wlan1: connected 
23:51:45 wireless,info 40:B3:95:F2:1C:47@wlan1: reassociating 
23:51:45 wireless,info 40:B3:95:F2:1C:47@wlan1: disconnected, ok 
23:51:45 wireless,info 40:B3:95:F2:1C:47@wlan1: connected 
23:51:45 wireless,info 40:B3:95:F2:1C:47@wlan1: reassociating 
23:51:45 wireless,info 40:B3:95:F2:1C:47@wlan1: disconnected, ok 
23:51:45 wireless,info 40:B3:95:F2:1C:47@wlan1: connected 
23:51:45 wireless,info 40:B3:95:F2:1C:47@wlan1: reassociating 
23:51:45 wireless,info 40:B3:95:F2:1C:47@wlan1: disconnected, ok 
23:51:45 wireless,info 40:B3:95:F2:1C:47@wlan1: connected 
23:51:45 wireless,info 40:B3:95:F2:1C:47@wlan1: reassociating 
23:51:45 wireless,info 40:B3:95:F2:1C:47@wlan1: disconnected, ok 
23:51:45 wireless,info 40:B3:95:F2:1C:47@wlan1: connected 
23:51:45 wireless,info 40:B3:95:F2:1C:47@wlan1: reassociating 
23:51:45 wireless,info 40:B3:95:F2:1C:47@wlan1: disconnected, ok 
23:51:45 wireless,info 40:B3:95:F2:1C:47@wlan1: connected 
23:51:46 wireless,info 40:B3:95:F2:1C:47@wlan1: reassociating 
23:51:46 wireless,info 40:B3:95:F2:1C:47@wlan1: disconnected, ok 
23:51:46 wireless,info 40:B3:95:F2:1C:47@wlan1: connected 
23:51:46 wireless,info 40:B3:95:F2:1C:47@wlan1: reassociating 
23:51:46 wireless,info 40:B3:95:F2:1C:47@wlan1: disconnected, ok 
23:51:46 wireless,info 40:B3:95:F2:1C:47@wlan1: connected 
23:51:46 wireless,info 40:B3:95:F2:1C:47@wlan1: reassociating 
23:51:46 wireless,info 40:B3:95:F2:1C:47@wlan1: disconnected, ok 
23:51:46 wireless,info 40:B3:95:F2:1C:47@wlan1: connected 
23:51:46 wireless,info 40:B3:95:F2:1C:47@wlan1: reassociating 
23:51:46 wireless,info 40:B3:95:F2:1C:47@wlan1: disconnected, ok 
23:51:46 wireless,info 40:B3:95:F2:1C:47@wlan1: connected 
23:51:46 wireless,info 40:B3:95:F2:1C:47@wlan1: reassociating 
23:51:46 wireless,info 40:B3:95:F2:1C:47@wlan1: disconnected, ok 
23:51:46 wireless,info 40:B3:95:F2:1C:47@wlan1: connected 
23:51:47 wireless,info 40:B3:95:F2:1C:47@wlan1: reassociating 
23:51:47 wireless,info 40:B3:95:F2:1C:47@wlan1: disconnected, ok 
23:51:47 wireless,info 40:B3:95:F2:1C:47@wlan1: connected 
23:51:47 wireless,info 40:B3:95:F2:1C:47@wlan1: reassociating 
23:51:47 wireless,info 40:B3:95:F2:1C:47@wlan1: disconnected, ok 
23:51:47 wireless,info 40:B3:95:F2:1C:47@wlan1: connected

Security is WPA1/TKIP+AES. Funnily it worked just fine until some minutes ago. Using ROS 5.24.

Edit: It works perfectly in 5 GHz A mode! In 2,4 GHz b/g or g-only mode, the problem from above happens… wtf?
Edit2: Now it works again also in 2,4 GHz b/g mode… I have NO idea what causes this, and I rebooted both devices (macbook and rb411u) several times with no effect…

Something’s rotten in the state of Mikrotik (or Apple, for that measure :slight_smile: )

16

Hello
I’m having the same problem, but no with Android or similar! I use the Mikrotik node to connect client TP-Link, Edimax and Ubiquiti. And in a lot of node with a lot of Routerboard I’m having the same problem!
The client start with this and then stay connected with the node, but stay in Tx/Rx Rate in 1Mbps/1Mbps and can’t do nothing. They can’t navigate
Help Please!!! it’s make me crazy!!!
Thanks
Rafael Lore

17

I feel fine knowing that I am not the only one
I am experiencing the same problem

Router:
Device: RB2011UAS-2HnD-IN
Version: 5.24

Devices:
iPhone 3gs (IOS 6.1.3)
iPad 2 WIFI model (IOS 6.1.3)

before, everything was running perfect with all same settings, but I dont know if it is related to Mikrotik’s updates or IOS updates.

On mikrotik I see my IOS device is TX=1mbps and RX=54mbps.

I want to confirm that this error does not happend if I am 2-3 meters in front of the Mikrotik, but 4-5 meters the problems begin. (the next room in home).

Laptops work fast sometimes, then it changes to slow, then fast…

I can do any test you want, thank you

18

Just a quick reply, changing rate from advanced to legacy seems to work fine, I will keep doing tests and reply later, btw wireless is in 20mhz, mode b/g/n, dual chain.

19

+1 for me exact same problems.

Ipad speedtest is good (25MB down / 2MB up) but results in poor streaming of videos on all IOS devices.

20

for those who are interested - when i changed my data rate under the wireless interface from legacy to advanced the problem seemed to go away.

not exactly sure what legacy vs advanced actually does ??? the explanation in the manual says

Starting from v5.9 default value is advanced since legacy mode was inefficient.