WiFi Speed is low

RouterOS Wireless Networking
1

Hello everyone,

I am trying to setup PtP with AP/Station Bridge using two RB912UAG-2HPnD with 2 external omni antenna each.

Antenna is,

I cannot achieve speed better then 70 (at best) but average is at 63-64Mbps.
Here is the image,




My configuration is,

AP_BRIDGE

add admin-mac=22:FD:74:22:22:22 auto-mac=no comment=defconf name=bridge \
    port-cost-mode=short
/interface wireless
set [ find default-name=wlan1 ] band=2ghz-g/n channel-width=20/40mhz-XX \
    country=no_country_set disabled=no frequency-mode=superchannel \
    max-station-count=10 mode=ap-bridge rx-chains=0,1 ssid=MyLink \
    tdma-period-size=1 tx-chains=0,1
/interface lte apn
set [ find default=yes ] ip-type=ipv4 use-network-apn=no
/interface wireless security-profiles
set [ find default=yes ] authentication-types=wpa2-psk mode=dynamic-keys \
    supplicant-identity=MikroTik
/interface bridge port
add bridge=bridge comment=defconf ingress-filtering=no interface=ether1 \
    internal-path-cost=10 path-cost=10
add bridge=bridge comment=defconf ingress-filtering=no interface=wlan1 \
    internal-path-cost=10 path-cost=10
/ip settings
set max-neighbor-entries=8192
/ipv6 settings
set disable-ipv6=yes max-neighbor-entries=8192
/interface ovpn-server server
set auth=sha1,md5
/ip address
add address=192.168.0.50/24 interface=bridge network=192.168.0.0
/ip dhcp-client
add comment=defconf interface=bridge
/routing bfd configuration
add disabled=no interfaces=all min-rx=200ms min-tx=200ms multiplier=5
/system identity
set name=RouterOS
/system note
set show-at-login=no

STATION_BRIDGE

# 1970-01-02 04:41:55 by RouterOS 7.13.4
# software id = 21122121212
#
# model = RB912UAG-2HPnD
# serial number = 444444444444
/interface bridge
add admin-mac=AA:BB:CC:01:22:22 auto-mac=no comment=defconf name=bridge \
    port-cost-mode=short
/interface wireless
set [ find default-name=wlan1 ] band=2ghz-g/n channel-width=20/40mhz-XX \
    country=no_country_set disabled=no frequency-mode=superchannel mode=\
    station-bridge rx-chains=0,1 ssid=MyLink tx-chains=0,1
/interface lte apn
set [ find default=yes ] ip-type=ipv4 use-network-apn=no
/interface wireless security-profiles
set [ find default=yes ] authentication-types=wpa2-psk mode=dynamic-keys \
    supplicant-identity=MikroTik
/interface bridge port
add bridge=bridge comment=defconf ingress-filtering=no interface=ether1 \
    internal-path-cost=10 path-cost=10
add bridge=bridge comment=defconf ingress-filtering=no interface=wlan1 \
    internal-path-cost=10 path-cost=10
/ip settings
set max-neighbor-entries=8192
/ipv6 settings
set disable-ipv6=yes max-neighbor-entries=8192
/interface ovpn-server server
set auth=sha1,md5
/ip address
add address=192.168.0.51/24 interface=bridge network=192.168.0.0
/ip dhcp-client
add comment=defconf interface=bridge
/routing bfd configuration
add disabled=no interfaces=all min-rx=200ms min-tx=200ms multiplier=5
/system identity
set name=RouterOS
/system note
set show-at-login=no

Can anyone give a hint what could be the problem, biig tnx in advance!

Kind regards everyone!

2

Have you tried the wireless protocols nstreme, nv2 ? How much is the CPU load? What is the value of CCQ?

3

the problem is you’re using omni antennas to make a ptp bridge. why?

4

the problem is you’re using omni antennas to make a ptp bridge

Indeed one of the potential problems,(using 40 MHz in 2.4GHz band is another), that cannot be seen from the config used, but is dependent on the RF spectrum in the environment.

So besides the config, one should at least look at the registration table , for signal levels, RX/TX CCQ, interface rates (Mbps,MHz,S,SGI).
Verify the used frequency, compared to a scan of the environment (Freq usage, Snooper, Scan, …)

Don’t know what new ROS versions do with “no-country set”, and with “superchannel”. Default country has changed lately from US to Latvia (changing limits from FCC to ETSI region)

5

i also noticed that but since there’s not visible the frequency, i’m quite sure he’s out of band like everybody does in 2ghz. you can’t run ptp in the normal wifi range except very rural.
superchannel (at least in EU) with newer devices starts at 2312. older started at 2172, which is conflicting with 4G band at 2100mhz, but 2312 is clean as it can be. i have 2 links at 2312Ce and they run perfectly.

6

he’s out of band like everybody does in 2ghz. you can’t run ptp in the normal wifi range except very rural.

Disagree

7

Hello everyone!

Thank you all for helping out.

First, I will get back with images of everything when I get back to location, I don’t have current access.
Why log hasn’t picked up freq I don’t know… is there a way to pickup everything , I have used “export file=something”.

Reason why I am using Omni … is that we have mobile setup … which can shift positions and we don’t want to change antenna orientation each time we shift position.
There is full line of sight and they will be range in around 100-200 meters.

Also… I want to note … (but will provide full images) … I have enabled both chains .. As i understood from documentation I need to enable chain0 and 1 to utilize both antenna I have put on the routerboards.

Don’t know if there is some special configuration I need to use to have one send and other side receive.

Also.. I will try different protocols and report back.

Big thank you once again !!

Kind regards!

8

Don’t know if there is some special configuration I need to use to have one send and other side receive.

Normally one uses both antenna for send and receive with 802.11n onwards. This dual spatial stream mode gives double bandwidth.
Instant dynamic value can be seen in the registration table: “xxxMbps -yyMHz /zS/SGI”, with numbers like xxx=144,yy=20,z=2 (SGI is the 0.4µsec guard interval)
Mbps can be used to find the MCS encoding used. https://mcsindex.com.
→ 802.11n is HT column , ac is VHT, ax is HE.
→ One Spatial stream goes till MCS7 in HT, Two antenna can go till MCS15
→ MCS used is dynamic, if transmissions fail/succeed MCS and nS go down and UP
Data throughput is some % of interface rate only. (See… http://forum.mikrotik.com/t/help-mikrotik-capsman-wireless-download-speed-max-200mb-but-pcs-mobiles-link-speed-is-866mbps/142677/1 )