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sputniki
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Poor 802.11g-Performance on R52N

Wed Feb 10, 2010 6:03 pm

I have a RB433 w. ROS4.3 running at a small office out there with small WiFi-bandwidth <5Mbps.
/interface wireless
set 0 ack-timeout=dynamic adaptive-noise-immunity=ap-and-client-mode allow-sharedkey=no antenna-gain=0 area="" arp=enabled band=\
    2ghz-b/g/n basic-rates-a/g=6Mbps basic-rates-b=1Mbps comment="" compression=no country=germany default-ap-tx-limit=0 \
    default-authentication=yes default-client-tx-limit=0 default-forwarding=yes dfs-mode=radar-detect disable-running-check=no \
    disabled=no disconnect-timeout=3s frame-lifetime=0 frequency=2427 frequency-mode=manual-txpower 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-extension-channel=\
    above-control ht-guard-interval=any ht-rxchains=0 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 ht-txchains=0 \
    hw-fragmentation-threshold=disabled hw-protection-mode=none hw-protection-threshold=0 hw-retries=4 l2mtu=2290 mac-address=\
    00:0C:42:3A:D7:E7 max-station-count=2007 mode=ap-bridge mtu=1500 name=wlan1 on-fail-retry-time=100ms periodic-calibration=default \
    periodic-calibration-interval=60 preamble-mode=both proprietary-extensions=post-2.9.25 radio-name=000C423AD7E7 rate-set=default \
    scan-list=default security-profile=JG-WLAN ssid=JG-WLAN 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 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 wmm-support=disabled
/interface wireless manual-tx-power-table
set wlan1 comment="" manual-tx-powers="1Mbps:17,2Mbps:17,5.5Mbps:17,11Mbps:17,6Mbps:17,9Mbps:17,12Mbps:17,18Mbps:17,24Mbps:17,36Mbps:1\
    7,48Mbps:17,54Mbps:17,HT20-0:0,HT20-1:0,HT20-2:0,HT20-3:0,HT20-4:0,HT20-5:0,HT20-6:0,HT20-7:0,HT40-0:0,HT40-1:0,HT40-2:0,HT40-3:0,\
    HT40-4:0,HT40-5:0,HT40-6:0,HT40-7:0"
/interface wireless nstreme
set wlan1 comment="" disable-csma=no enable-nstreme=no enable-polling=yes framer-limit=3200 framer-policy=none
/interface wireless align
set active-mode=yes audio-max=-20 audio-min=-100 audio-monitor=00:00:00:00:00:00 filter-mac=00:00:00:00:00:00 frame-size=300 \
    frames-per-second=25 receive-all=no ssid-all=no
Have experimented with:
adaptive-noise-immunity, dfs-mode and frequency, because there are many other wifis and a cellular-phone-bs (200m)
tried ht-rxchains=0,1 , ht-txchains=0,1 , frequency-mode=regulatory-domain and ht-extension-channel=none but got the best results with the settings printed above.

I have two other wireless clients there but no idea how to force them to transmit more than 1Mbps. The laptop which I tried has an intel PRO/Wireless 2915ABG-networkcard...
 
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sergejs
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Re: Poor 802.11g-Performance on R52N

Fri Feb 12, 2010 5:10 pm

What do you see in /interface wireless registration-table print for the connected clients?
 
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congo
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Re: Poor 802.11g-Performance on R52N

Sun Feb 14, 2010 1:56 pm

I have the same problems.
See http://forum.mikrotik.com/viewtopic.php?f=3&t=38437
I have been struggling with these issues for several weeks. The users of the MT AP are complaining all the time, because the performance is unacceptable. We had to put our flaky old AP back into service.
I will make tests with a b/g miniPCI next week, because I think there is something wrong with the R52n.

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