These are the configs that we are using for a PtP link using CM9 cards.
Flags: X - disabled, R - running
0 R name=“wlan1” mtu=1500 mac-address=00:0B:6B:37:6A:A2 arp=enabled
disable-running-check=no interface-type=Atheros AR5213
radio-name=“Oakbrush to Uptown” mode=ap-bridge ssid=“ArchuletaCounty”
area=“” frequency-mode=manual-txpower country=united states
antenna-gain=0 frequency=5240 band=5ghz scan-list=default
rate-set=default supported-rates-b=1Mbps,2Mbps,5.5Mbps,11Mbps
supported-rates-a/g=6Mbps,9Mbps,12Mbps,18Mbps,24Mbps,36Mbps,48Mbps,
54Mbps
basic-rates-b=1Mbps basic-rates-a/g=6Mbps max-station-count=2007
ack-timeout=dynamic tx-power-mode=default noise-floor-threshold=default
periodic-calibration=default burst-time=disabled dfs-mode=none
antenna-mode=ant-a wds-mode=dynamic wds-default-bridge=bridge1
wds-ignore-ssid=no update-stats-interval=disabled
default-authentication=yes default-forwarding=yes 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
[admin@MikroTik] interface wireless>
My question is what are some settings that we can tweak to maximize bandwidth. We are seeing about 12 megs total on a speed test. 6 up and 6 down. The ccq runs at about 30% Tx and Rx. There is also no interference. Any help would be great.
Well, preamble-mode set to short on both, compression sometimes can help too (but I don’t usually use compression).
Disable connection tracking if it’s just a bridge, also check your CPU usage to see if its high and something else needs to be disabled.
Set your data rates to whatever the best you can get solid. Also, if you have a solid 36Mbps/36Mbps rate, you could up your basic rate to 12 or 18 for slightly faster speeds. 12 Mbps to me indicates your rate is around 18Mbps or maybe 24, but CCQ at 30 is rather low, I see a lot of my links at 90’s/80’s for good links. 30 says to me there’s interference you’re not seeing in the signal strength - try a different channel, you might be surprised. Look at your ACK timeout as well, mine below is 25us from the dynamic setting.
I have a 4 mile link, 5240mhz, WRAP boards, CM9 cards, with 2.9.8 (old version!) running a -66 signal, 48/54 MBps normal rate that gets 25Mbps UDP, 16Mbps TCP one way, 17/9 on UDP both, and 9/10 on TCP both. NStreme w/ polling. Link uptime 21days out of 21 days since last reboot. ACK timeout, 25us (dynamic).
Remember, those bandwidth test #'s are running BTest THROUGH the link not ON the link, so like in my case, I ran it from one AP on tower A to another AP on tower B via the backhaul link.