Hello,

We have installed Mikrotik OS 2.9.24 on RB500 + Atheros 400mW card within.

The Access Point has 10 associated wireless customers (SU) and what is experienced as a problem is a slow speed (when they start using speed drops from 4Mb to 30k). We did test from SU to AP or SU to main network, we got the same results.
Max usage on AP what we can see is only 5Mb. I like to know we are doing something wrong or RB500 cann't handle more than 5 SU's ?

Bellow is a print screen of the configuration :

[admin@MikroTik] interface wireless> print
Flags: X - disabled, R - running
0 R name="wlan1" mtu=1500 mac-address=00:01:B4:02:0C:03 arp=enabled
disable-running-check=no interface-type=Atheros AR5213
radio-name="AP north" mode=ap-bridge ssid="accesstest" area=""
frequency-mode=regulatory-domain country=canada antenna-gain=0
frequency=5300 band=5ghz scan-list=default rate-set=configured
supported-rates-a/g=6Mbps,9Mbps,12Mbps,18Mbps,24Mbps
basic-rates-a/g=6Mbps max-station-count=2007 ack-timeout=dynamic
tx-power-mode=default noise-floor-threshold=default
periodic-calibration=default periodic-calibration-interval=60
burst-time=disabled dfs-mode=none antenna-mode=ant-b wds-mode=dynamic
wds-default-bridge=bridge1 wds-default-cost=100 wds-cost-range=50-150
wds-ignore-ssid=no update-stats-interval=disabled
default-authentication=no default-forwarding=no default-ap-tx-limit=0
default-client-tx-limit=0 hide-ssid=yes security-profile=default
disconnect-timeout=3s on-fail-retry-time=100ms preamble-mode=both
compression=no allow-sharedkey=no

Maybe the radio is getting too hot and having allot of retries. I would try setting the power lower than the default. Try something like 23dBm fixed.

John

We tried even 21dBm but with the same result.
Only after 4PM. when the most businesses don't use bandwidth speed is 6Mb up/down.
In the morning when customers start using it again speed is jumping to 30K.

Thank you,
D.

Could very well be interference then... Can you try to use another frequency?

What other wireless activities does a site survey/scan show you?
What is your CCQ/noise level?

Best regards,
Christian Meis

[admin@MikroTik] interface wireless> monitor wlan1
status: running-ap
band: 5ghz
frequency: 5300MHz
noise-floor: -100dBm
overall-tx-ccq: 44%
registered-clients: 11
authenticated-clients: 11
current-ack-timeout: 93
current-distance: 93
nstreme: no
current-tx-powers: 6Mbps:23,9Mbps:23,12Mbps:23,18Mbps:23,24Mbps:23,
36Mbps:21,48Mbps:19,54Mbps:18
notify-external-fdb: no

What we have also discerned - the CPU usage is also getting above 50% on RB500.
The problem is the same on almost every RB500 Access Point currently in use if the number of SU's(wireless customers) increases to 10.
On every location where we have a standard PC router even with more wireless customers the described problem doesn't exist.

Thank you,
D.