I am having WiFi download performance issues with the RB2011UiAS-2HnD-IN, RB951G-2HnD, and RB912UAG-2HPnD-OUT (using a pair of ACOMNIRPSMA antennas). I am having similar speed issues with all three. I have 100 Mbps symmetric internet service and my goal is to obtain at least 55 Mbps wireless symmetric to my client devices (2x2 MIMO Apple iMac, 2x2 MIMO Dell laptop) using 20 MHz of spectrum. I originally used RouterOS 6.23 and am now using 6.28 and 6.29 and have tried the wireless, wireless-fp, and wireless-cm2 packages on 6.28 and 6.29.
Using a cheap Buffalo router/AP, I am able to get a fairly consistent 72 - 76 Mbps upload and download to both devices. 2.4 GHz, 20 MHz, 2 chain MIMO. Plugging the iMac and Dell laptop into the router directly (a RB1100AHx2) I get about 94 - 98 Mbps symmetric to my ISP’s local speed test server.
Using the Mikrotik APs, I get a fairly consistent 72-76 Mbps upload, but only 35 Mbps download. Almost as though MIMO is broken on the download side. I have made many adjustments, toggled antenna chains off and back on, dropped TX power, manually configured higher MCS rates, set distance to ‘indoors’, dropped the AMSDU limit and threshold, etc. I still can’t reach more than 35 Mbps download to either the iMac or Dell laptop without using 40 MHz (which I don’t want to do due to spectrum usage in the area).
Are there any known MIMO issues with Mikrotik wireless devices in AP bridge mode? it almost seems like I’m getting the proper 2S MIMO for upload, but only 1S performance for download?
Please post wireless and interface settings from RB2011UiAS-2HnD-IN and RB951G-2HnD.
How do you test download speed ? What results do you get when you use speedtest.net tool ?
Try to re-install device with Netinstall to RouterOS 6.29.1 and configure from scratch (you can use export file to do that).
NetInstall : http://wiki.mikrotik.com/wiki/Manual:Netinstall
RouterOS 6.29.1 : http://download2.mikrotik.com/routeros/6.29.1/routeros-mipsbe-6.29.1.npk
And yes you should stick to Wireless-fp / wireless-cm2 packages.
Thank you for the advice. Earlier today I used Netinstall to load 6.29.1 on the RB951G-2HnD, disabled the wireless package, enabled the wireless-fp package (and rebooted), and configured from scratch. Current configuration is below. I test using speedtest.net which utilizes my ISP’s local Ookla server here in the city. These speed tests are generally very consistent.
From a copper connection on both machines (Apple iMac and Dell laptop) I get about 95 Mbps upload and 95 Mbps download. From a wireless connection using a 2x2 MIMO Buffalo router/AP (in basic bridge mode, no routing), I get about 70 - 78 Mbps upload and download using speedtest.net.
Currently, with the RB951G-2HnD, I am still seeing about 33 - 35 Mbps download and 70 - 80 Mbps upload on speedtest.net. The AP Client Statistics tab is reporting both the iMac and Dell laptop as connecting at 144.4Mbps-20MHz/2S/SGI for Tx and Rx. Sometimes this drops to 130Mbps-20MHz/2S.
When I test, I only have one AP powered up at a time. I power down the APs I am not testing to reduce background noise. I also only have one wireless client powered up at a time as well. There is very little 2.4 GHz background noise in my area.
/interface bridge
add name=local
/interface wireless
set [ find default-name=wlan1 ] amsdu-limit=2048 amsdu-threshold=2048 band=\
2ghz-onlyn country="united states" disabled=no distance=indoors \
frequency=2437 l2mtu=1600 mode=ap-bridge rate-set=configured ssid=\
MikroTikTest tx-power-mode=all-rates-fixed wireless-protocol=802.11
/ppp profile
set [ find name=default ] name=default
set [ find name=default-encryption ] name=default-encryption
/interface bridge port
add bridge=local interface=ether1
add bridge=local interface=ether2
add bridge=local interface=wlan1
/ip address
add address=10.10.10.2/24 interface=local network=10.10.10.0
/ip dhcp-client
add default-route-distance=0 dhcp-options=hostname,clientid disabled=no \
interface=local
/system clock
set time-zone-name=America/Vancouver
/system leds
set 0 interface=wlan1
/tool bandwidth-server
set enabled=no
/tool romon port
add disabled=no