Help with 802.11n link setup

RouterOS Wireless Networking
1

Hello everybody. sorry for my bad english.

The problem is making the 11n mode link.
My hardware (more information in urls):
2 x dish antennas http://shop.nag.ru/catalog/item/01780
2 x panel antennas http://www.nix.ru/autocatalog/wireless_multico/Multico_APV014_14dBi_72870.html
On each side we have 1 dish and 1 panel antennas.
2 x Routers (RB/411AH)+(R52n).

When I set the 802.11g mode the link working perfectly. I have ~100% ccq on each side.
But when I set the 802.11n mode the link connecting on 300Mbps HT rate and it’s dropping to 54Mbps when the data is start transfering on the link. Moreover i get ~60% ccq.

Configuration sideA:

/interface wireless
set 0 ack-timeout=36 adaptive-noise-immunity=none allow-sharedkey=no \
    antenna-gain=0 area="" arp=enabled band=2.4ghz-onlyg basic-rates-a/g=\
    6Mbps,54Mbps 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=yes dfs-mode=none \
    disable-running-check=no disabled=no disconnect-timeout=3s frame-lifetime=0 \
    frequency=2382 frequency-mode=superchannel frequency-offset=0 hide-ssid=no \
    ht-ampdu-priorities=0,1,2,3,4,5,6,7 ht-amsdu-limit=8192 ht-amsdu-threshold=\
    8192 ht-basic-mcs=mcs-0 ht-extension-channel=above-control \
    ht-guard-interval=any ht-rxchains=1 ht-supported-mcs=mcs-0,mcs-1,mcs-2,mcs-3 \
    ht-txchains=1 hw-fragmentation-threshold=disabled hw-protection-mode=none \
    hw-protection-threshold=0 hw-retries=4 l2mtu=2290 mac-address=\
    00:0C:42:61:76:23 max-station-count=2007 mode=bridge mtu=1500 name=wlan \
    on-fail-retry-time=100ms periodic-calibration=disabled \
    periodic-calibration-interval=60 preamble-mode=both proprietary-extensions=\
    post-2.9.25 radio-name=000C42617623 rate-set=default scan-list=2382 \
    security-profile=default ssid=MikroTik station-bridge-clone-mac=\
    00:00:00:00:00:00 supported-rates-a/g=6Mbps,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=bridge wds-default-cost=\
    100 wds-ignore-ssid=no wds-mode=static wmm-support=enabled

Configuration sideB:

/interface wireless
set 0 ack-timeout=36 adaptive-noise-immunity=none allow-sharedkey=no \
    antenna-gain=0 area="" arp=enabled band=2.4ghz-onlyg basic-rates-a/g=\
    6Mbps,54Mbps 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=yes dfs-mode=none \
    disable-running-check=no disabled=no disconnect-timeout=3s \
    frame-lifetime=0 frequency=2382 frequency-mode=superchannel \
    frequency-offset=0 hide-ssid=no ht-ampdu-priorities=0,1,2,3,4,5,6,7 \
    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=\
    above-control ht-guard-interval=any ht-rxchains=1 ht-supported-mcs=\
    mcs-0,mcs-1,mcs-2,mcs-3,mcs-4,mcs-5,mcs-6,mcs-7 ht-txchains=1 \
    hw-fragmentation-threshold=disabled hw-protection-mode=none \
    hw-protection-threshold=0 hw-retries=4 l2mtu=2290 mac-address=\
    00:0C:42:61:75:75 max-station-count=2007 mode=station-wds mtu=1500 name=\
    wlan-0.161 on-fail-retry-time=100ms periodic-calibration=disabled \
    periodic-calibration-interval=60 preamble-mode=both \
    proprietary-extensions=post-2.9.25 radio-name=000C42617575 rate-set=\
    default scan-list=2382 security-profile=default ssid=MikroTik \
    station-bridge-clone-mac=00:00:00:00:00:00 supported-rates-a/g=\
    6Mbps,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=bridge wds-default-cost=100 wds-ignore-ssid=no \
    wds-mode=dynamic wmm-support=enabled

What the problem can be?

2

I have same problem.

Tested 4.17. 5.6, 5.6, 5.7


I need transparent bridge and when BRIDGE–> CLIENT BRIDGE is used, link ranged 300/300 fall to 54/54 in few seconds/mins.

If i use BRIDGE–> CLIENT PSEUDOBRIDGE or AP BRIDGE–> CLIENT PSEUDOBRIDGE everything is OK, but bridge is not enought transparent as should be for my usage.


IS THIS A BUG ???

3

One antenna is horizontal and other vertical polarization?

Use station-bridge mode.
Upgrade to latest RouterOS version. Try out Nstreme or Nv2 wireless protocols.

4

Both antenas are MIMO, perfectly pointed by laser and water level. Distance is 3km.

CLIENT BRIDGE is of course STATION BRIDGE, my mistake. Bad written.

5

In this setup example you have the band=2.4GHz Onlyg - try specifying wireless N only in your profile.

Are you encrypting your link with ? If so be sure to use WPA2-PSK and AES not WPA or TKIP as this will stop speeds higher than 54Mbps

/interface wireless
set 0 adaptive-noise-immunity=none allow-sharedkey=no antenna-gain=0 area=“”
arp=enabled band=5ghz-onlyn basic-rates-a/g=6Mbps bridge-mode=enabled
channel-width=20/40mhz-ht-above compression=no country=no_country_set
default-ap-tx-limit=0 default-authentication=yes default-client-tx-limit=
0 default-forwarding=yes dfs-mode=none disable-running-check=no disabled=
no disconnect-timeout=3s distance=dynamic frame-lifetime=0 frequency=5180
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-guard-interval=any ht-rxchains=0,1 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=0,1 hw-fragmentation-threshold=disabled
hw-protection-mode=none hw-protection-threshold=0 hw-retries=9 l2mtu=2290
mac-address=00:0x:xx:xx:xx:xx max-station-count=2007 mode=station-wds
mtu=1500 name=wlan1 noise-floor-threshold=default nv2-cell-radius=30
nv2-noise-floor-offset=default nv2-preshared-key=XXXXXXX nv2-qos=
default nv2-queue-count=2 nv2-security=enabled on-fail-retry-time=200ms
periodic-calibration=default periodic-calibration-interval=60
preamble-mode=both proprietary-extensions=post-2.9.25 radio-name=
000C4288405F rate-selection=legacy rate-set=default scan-list=default
security-profile=default ssid=XxxxxX station-bridge-clone-mac=
00:00:00:00:00:00 supported-rates-a/g=
6Mbps,9Mbps,12Mbps,18Mbps,24Mbps,36Mbps,48Mbps,54Mbps tdma-period-size=2
tx-power-mode=default update-stats-interval=disabled wds-cost-range=
50-150 wds-default-bridge=bridge1 wds-default-cost=100 wds-ignore-ssid=no
wds-mode=dynamic wireless-protocol=nv2 wmm-support=disabled