Bad wireless reception with RB2011UAS-2HnD-IN

Hi, I recently bought a RB2011UAS-2HnD-IN to replace my old router. My problem is that I have poor reception in almost every location in my apartment. I tested this with 2 laptops and 2 smart phones, all suffering from bad reception.

When I’m sitting next to my router I have a signal strength from ~-50db according to my router and laptop. I’m no expert but I thought this number was already quite high. The problems really occur when I move to another room. Then the signal drops to ~-80db with a lot of packet loss. However the next room in this case is only ~5 meters away from the router, with an open door and very very thin walls (from wood).

So far I tried moving the router to a more central location, play with the angle of the antenna’s and placement of the router etc, but this doesn’t change anything. I’ve chosen a free channel. I live in a quite area of the city. I only receive 10 other wifi signals which are all located on channel 1, 6 or 11. My router is setup to use channel 8. I also tried removing the power of all my other electric devices to minimise interference.

The wireless settings are pretty much the default settings. I have only set a channel and WPA password. Here is the relevant config:

compact:

set 0 band=2ghz-b/g/n channel-width=20/40mhz-ht-above country=netherlands disabled=no distance=indoors frequency=2447 frequency-mode=regulatory-domain ht-rxchains=0,1 ht-txchains=0,1 l2mtu=2290 mode=ap-bridge ssid=*** wireless-protocol=\
    802.11
/interface wireless security-profiles
set [ find default=yes ] authentication-types=wpa2-psk mode=dynamic-keys supplicant-identity=MikroTik wpa2-pre-shared-key=***

full:

/interface wireless security-profiles
set [ find default=yes ] authentication-types=wpa2-psk eap-methods=passthrough group-ciphers=aes-ccm group-key-update=5m interim-update=0s management-protection=disabled management-protection-key="" mode=dynamic-keys name=default \
    radius-eap-accounting=no radius-mac-accounting=no radius-mac-authentication=no radius-mac-caching=disabled radius-mac-format=XX:XX:XX:XX:XX:XX radius-mac-mode=as-username static-algo-0=none static-algo-1=none static-algo-2=none \
    static-algo-3=none static-key-0="" static-key-1="" static-key-2="" static-key-3="" static-sta-private-algo=none static-sta-private-key="" static-transmit-key=key-0 supplicant-identity=MikroTik tls-certificate=none tls-mode=\
    no-certificates unicast-ciphers=aes-ccm wpa-pre-shared-key="" wpa2-pre-shared-key=***
/interface wireless
set 0 adaptive-noise-immunity=none allow-sharedkey=no antenna-gain=0 area="" arp=enabled band=2ghz-b/g/n basic-rates-a/g=6Mbps basic-rates-b=1Mbps bridge-mode=enabled channel-width=20/40mhz-ht-above compression=no country=netherlands \
    default-ap-tx-limit=0 default-authentication=yes default-client-tx-limit=0 default-forwarding=yes dfs-mode=none disable-running-check=no disabled=no disconnect-timeout=3s distance=indoors frame-lifetime=0 frequency=2447 frequency-mode=\
    regulatory-domain frequency-offset=0 hide-ssid=no ht-ampdu-priorities=0 ht-amsdu-limit=8192 ht-amsdu-threshold=8192 ht-basic-mcs=mcs-0,mcs-1,mcs-2,mcs-3,mcs-4,mcs-5,mcs-6,mcs-7 ht-guard-interval=any ht-rxchains=0,1 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-txchains=0,1 hw-fragmentation-threshold=disabled hw-protection-mode=none \
    hw-protection-threshold=0 hw-retries=7 l2mtu=2290 mac-address=D4:CA:6D:**:**:** max-station-count=2007 mode=ap-bridge mtu=1500 multicast-helper=default name=wlan1 noise-floor-threshold=default nv2-cell-radius=30 nv2-noise-floor-offset=\
    default nv2-preshared-key="" nv2-qos=default nv2-queue-count=2 nv2-security=disabled on-fail-retry-time=100ms periodic-calibration=default periodic-calibration-interval=60 preamble-mode=both proprietary-extensions=post-2.9.25 \
    radio-name=D4CA6D7BC55F rate-selection=advanced rate-set=default scan-list=default security-profile=default ssid=*** station-bridge-clone-mac=00:00:00:00:00:00 supported-rates-a/g=6Mbps,9Mbps,12Mbps,18Mbps,24Mbps,36Mbps,48Mbps,54Mbps \
    supported-rates-b=1Mbps,2Mbps,5.5Mbps,11Mbps tdma-period-size=2 tx-power-mode=default update-stats-interval=disabled wds-cost-range=50-150 wds-default-bridge=none wds-default-cost=100 wds-ignore-ssid=no wds-mode=disabled \
    wireless-protocol=802.11 wmm-support=disabled
/interface wireless manual-tx-power-table
set wlan1 manual-tx-powers="1Mbps:17,2Mbps:17,5.5Mbps:17,11Mbps:17,6Mbps:17,9Mbps:17,12Mbps:17,18Mbps:17,24Mbps:17,36Mbps:17,48Mbps:17,54Mbps:17,HT20-0:17,HT20-1:17,HT20-2:17,HT20-3:17,HT20-4:17,HT20-5:17,HT20-6:17,HT20-7:17,HT40-0:17,HT40-\
    1:17,HT40-2:17,HT40-3:17,HT40-4:17,HT40-5:17,HT40-6:17,HT40-7:17"
/interface wireless nstreme
set wlan1 disable-csma=no enable-nstreme=no enable-polling=yes framer-limit=3200 framer-policy=none

could you check what is the output power at the moment when you are using that AP?
Try setting the channel-width to 20mhz and check again.

I’ve set the channel-width to 20mhz with no success. Can you tell me where I can see the output power?

Click on the Advanced Tab in wireless interface and go to the Current-TX-Power tab.

I’ve also played with the Tx power mode by setting it to card-rates and playing with the Tx power value (between 10 and 20), but with no success.

Anyone has any more ideas? Someone sugested me to place the router on a metal plate. I wont think this would help tbh but I have no metal plate to confirm atm.

I currently use a 20 euro budget router because it has perfect reception in my 50m2 apparent, whereas my 150 euro mikrotik only has reception in the living room.

for RB2011 to change the power you need to use tx-power-mode=all-rates-fixed

Ah, TIL :slight_smile:. Any suggestions for an appropriate value? Or just play with values between 10-25?

Well no noticeable difference. I played with all values between 5-25, constantly testing the performance. I got it down to -75db.

Try:
Adaptive Noise Immunity: “ap and client mode”
DFS Mode: “no radar detect”

maybe you could reset the wireless configuration and test again with the default configuration?

What signal levels you see when you only B or B/G band?

Do you have some advanced power saving options enabled on the clients? For testing maybe you could disable them?

Having the same issues as the topic starter. Unstable connection behind the brick wall. With previous Dir-825 openwrt never had such problems and Dir-825 has 2dB antennae while RB2011UAS-2HnD-IN has 4dB.

Tried to lower signal levels to 17dB. No chance connection is unstable too. It looks like RouterBoards receiver just doesn’t see/listen WiFi device that is connected to it after some time of operation. Signal level on the phone or notebook is good but on RB2011UAS-2HnD-IN - bad. What can we do?

Also this is the same problem as described here http://forum.mikrotik.com/t/radius-server-not-working-in-2-8-11/127/1
So at least three guys here have that problem… Tell me what to do and I will do my best to localise the source of the problem!

Also the same issue I beleive is: http://forum.mikrotik.com/t/rb2011uas-2hnd-wireless-ping-loss/66157/1

PS: That issue was on 5.21, 5.23, 5.24, 5.25 and still remains on 6.0final.

Well looks like I found the root of the problem.

If I set channel width to 20MHz all become rock stable as it was on good old Dir-825.

But if I set channel width to
20Mhz/40Mhz Above or 20Mhz/40Mhz Below - when distance becomes far, I see some crazy hopping in Signal Strengths.

Hope you can fix that as the problem looks as some flaw in software algo.

I suppose you need to autoswitch connection to 20MHz mode if the distance is far/signal is low. If the signal strength is good move back to 40MHz… Maybe that is how all other routers do behave…

Please read: http://www.smallnetbuilder.com/wireless/wireless-features/31743-bye-bye-40-mhz-mode-in-24-ghz-part-1

Anyone has found a fix for this? Reception is really bad on this one. Tried setting channel width to 20MHz, but still I keep getting disconnects. I get weak signals even when the devices are less than 3 feet away from the router, no walls between them.

My Nexus 4 (wifi power saving off) is sitting on my desk, right beside the RB2011UAS-2HnD-IN with -76db (???). Any more ideas on how to fix this?

http://wiki.maemo.org/Wifi_power_saving_mode

Alas this router is not compatible with PSM of Samsung Galaxy Note II, Samsung Galaxy S3, Samsung Note 10.1 (I personally own all those three devices). And you report these times Nexus 4.

I’ve contacted support about that issue but they only promised to fix that issue (no beta versions available yet) :frowning:

Hi,

I have the same problem i think. Signal is very week. I have RB2011UiAS-2HnD-IN. Can not get any signal from next room.

Did you find any solution?

This is my inssider screenshot. Mikrotik is next to my laptop. SSID KATMANDU is a tp-link AP in the same room.
image1.png

This is bad wifi device. Lost money on it :frowning:

Please try to reset the wireless configuration by clicking on the reset configuration for your wireless interface and configure it again. Also the power settings are the highest with country set to US. The calibrated settings are optimal and at their max when the country is set to US. Changing the power out to higher would only lower the performance.

Unfortunately no change. Is it possible to be a hardware issue?
screen.png

I was first opened the subject on http://forum.mikrotik.com/t/rb2011uias-2hnd-weak-wireless-signal-problem/76887/6

What I have tried for now is;
Setting the region United States. But either with regulatory-domain or other settings, nothing worked .
I opened the device. Nothing seemed wrong. Antenna connectors seems little bit loose but I am not sure how it was supposed to be.
I pushed them gently to fix just in case. But they are not close fit like pcmci type wireless cards antenna connectors.
Device has ROS 6.12. And I checked and try almost everything include HT settings. BG mode only 20 Mhz , Fix TX 30 Dbm etc..