I have some strange problems with 802.11n 2.4GHz base station.
Hardware:
IBM x86 PC as mikrotik ap
Mini pci card TP-LINK TL-WN861N
2x TP-LINK omni antennas
2x 3m low loss 50ohm coax. cable.
Software:
Mikrotik 4.9
Problem:
I have for about 10 clinets asocciated, eight of them are using 2.4GHz b/g devices, and two of them using Levelone WBR-6002 802.11n draft devices.
All signals are between -55 to -65, SNR 40-45dbm
Sometimes it's working perfect, good signal strenght, good data rates, but sometime ONLY WBR-6002 devices are having problems, signal is still good, but Signal-To-Noise falls to 5-6 dbm, data rates are changing every second, ping is very bad, when this happens, other asocciated clients doesn't have any problems, only 802.11n devices.
Tried to change WBR-6002 devices, with other, new, same product, but the problem is same.
I changed frequency too, but with no luck, it's rural place and when i scan i see only two or three base stations, so i think it's not intereference problem.
My config:
Code: Select all
name="wlan-ap-2.4GHzN" mtu=1500 mac-address=00:1D:0F:BC:40:F5 arp=enabled interface-type=Atheros 11N
mode=ap-bridge ssid="S3" frequency=2432 band=2ghz-b/g/n scan-list=default wds-mode=disabled
wds-default-bridge=none wds-ignore-ssid=no default-authentication=yes default-forwarding=no
default-ap-tx-limit=0 default-client-tx-limit=0 hide-ssid=no security-profile=default compression=no
set 0 ack-timeout=dynamic 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 comment="" compression=no country=no_country_set \
default-ap-tx-limit=0 default-authentication=yes default-client-tx-limit=0 default-forwarding=no dfs-mode=none \
disable-running-check=no disabled=no disconnect-timeout=3s frame-lifetime=0 frequency=2432 frequency-mode=\
manual-txpower 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-extension-channel=disabled ht-guard-interval=any \
ht-rxchains=0,2 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=0,2 hw-fragmentation-threshold=disabled hw-protection-mode=none hw-protection-threshold=0 \
hw-retries=4 l2mtu=2290 mac-address=00:1D:0F:BC:40:F5 max-station-count=2007 mode=ap-bridge mtu=1500 name=\
wlan-ap-2.4GHzN on-fail-retry-time=100ms periodic-calibration=default periodic-calibration-interval=60 \
preamble-mode=both proprietary-extensions=post-2.9.25 radio-name="" rate-set=default scan-list=default \
security-profile=default ssid=S3 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
Best Regards!
