Why low TX CCQ on Wi-Fi bridge?

F

fdroid2019-03-30 12:59:27

WiFi

fdroid, 2019-03-30 12:59:27

Bridge of two SXT 2, distance about 120m.
192.168.50.5 - base
192.168.50.6 - second point
Screenshot from the second point:

Pings periodically increase:

[[email protected]_Base] > ping 192.168.50.6
  SEQ HOST                                     SIZE TTL TIME  STATUS                                      
    0 192.168.50.6                               56  64 4ms  
    1 192.168.50.6                               56  64 2ms  
    2 192.168.50.6                               56  64 3ms  
    3 192.168.50.6                               56  64 3ms  
    4 192.168.50.6                               56  64 3ms  
    5 192.168.50.6                               56  64 3ms  
    6 192.168.50.6                               56  64 10ms 
    7 192.168.50.6                               56  64 5ms  
    8 192.168.50.6                               56  64 1ms  
    9 192.168.50.6                               56  64 9ms  
   10 192.168.50.6                               56  64 2ms  
   11 192.168.50.6                               56  64 3ms  
   12 192.168.50.6                               56  64 2ms  
   13 192.168.50.6                               56  64 2ms  
   14 192.168.50.6                               56  64 2ms  
   15 192.168.50.6                               56  64 3ms  
   16 192.168.50.6                               56  64 2ms  
   17 192.168.50.6                               56  64 2ms  
   18 192.168.50.6                               56  64 20ms 
   19 192.168.50.6                               56  64 2ms  
    sent=20 received=20 packet-loss=0% min-rtt=1ms avg-rtt=4ms max-rtt=20ms 
  SEQ HOST                                     SIZE TTL TIME  STATUS                                      
   20 192.168.50.6                               56  64 2ms  
   21 192.168.50.6                               56  64 2ms  
   22 192.168.50.6                               56  64 2ms  
   23 192.168.50.6                               56  64 1ms  
   24 192.168.50.6                               56  64 2ms  
   25 192.168.50.6                               56  64 3ms  
   26 192.168.50.6                               56  64 3ms  
   27 192.168.50.6                               56  64 2ms  
   28 192.168.50.6                               56  64 3ms  
   29 192.168.50.6                               56  64 2ms  
   30 192.168.50.6                               56  64 2ms  
   31 192.168.50.6                               56  64 2ms  
   32 192.168.50.6                               56  64 1ms  
   33 192.168.50.6                               56  64 1ms  
   34 192.168.50.6                               56  64 2ms  
   35 192.168.50.6                               56  64 3ms  
   36 192.168.50.6                               56  64 2ms  
    sent=37 received=37 packet-loss=0% min-rtt=1ms avg-rtt=3ms max-rtt=20ms

Base config:

/interface wireless
set [ find default-name=wlan1 ] adaptive-noise-immunity=ap-and-client-mode \
    allow-sharedkey=no ampdu-priorities=0 amsdu-limit=8192 amsdu-threshold=\
    8192 antenna-gain=0 area="" arp=enabled arp-timeout=auto band=2ghz-onlyn \
    basic-rates-a/g="" basic-rates-b="" bridge-mode=enabled channel-width=\
    20/40mhz-Ce compression=no country=no_country_set default-ap-tx-limit=0 \
    default-authentication=yes default-client-tx-limit=0 default-forwarding=\
    yes disable-running-check=no disabled=no disconnect-timeout=3s distance=\
    dynamic frame-lifetime=0 frequency=2412 frequency-mode=superchannel \
    frequency-offset=0 guard-interval=any hide-ssid=no ht-basic-mcs=\
    mcs-0,mcs-1,mcs-2,mcs-3,mcs-4,mcs-5,mcs-6,mcs-7 ht-supported-mcs="mcs-0,mc\
    s-1,mcs-2,mcs-3,mcs-4,mcs-5,mcs-6,mcs-7,mcs-8,mcs-9,mcs-10,mcs-11,mcs-12,m\
    cs-13,mcs-14,mcs-15,mcs-16,mcs-17,mcs-18,mcs-19,mcs-20,mcs-21,mcs-22,mcs-2\
    3" hw-fragmentation-threshold=disabled hw-protection-mode=none \
    hw-protection-threshold=0 hw-retries=7 installation=any \
    interworking-profile=disabled keepalive-frames=enabled l2mtu=1600 \
    mac-address=B8:69:F4:35:06:34 max-station-count=2007 mode=bridge mtu=1500 \
    multicast-buffering=disabled multicast-helper=default name=wlan1 \
    noise-floor-threshold=default nv2-cell-radius=30 nv2-downlink-ratio=50 \
    nv2-mode=dynamic-downlink nv2-noise-floor-offset=default \
    nv2-preshared-key=******** nv2-qos=default nv2-queue-count=2 \
    nv2-security=enabled nv2-sync-secret="" on-fail-retry-time=100ms \
    preamble-mode=both radio-name=B869F4350634 rate-selection=advanced \
    rate-set=configured rx-chains=0,1 scan-list=default secondary-channel="" \
    security-profile=default ssid=WB station-bridge-clone-mac=\
    00:00:00:00:00:00 station-roaming=enabled supported-rates-a/g="" \
    supported-rates-b="" tdma-period-size=2 tx-chains=0,1 tx-power=21 \
    tx-power-mode=all-rates-fixed update-stats-interval=disabled vlan-id=1 \
    vlan-mode=no-tag 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 wps-mode=push-button
/interface wireless manual-tx-power-table
set wlan1 manual-tx-powers="1Mbps:17,2Mbps:17,5.5Mbps:17,11Mbps:17,6Mbps:17,9M\
    bps:17,12Mbps:17,18Mbps:17,24Mbps:17,36Mbps:17,48Mbps:17,54Mbps:17,HT20-0:\
    17,HT20-1:17,HT20-2:17,HT20-3:17,HT20-4:17,HT20-5:17,HT20-6:17,HT20-7:17,H\
    T40-0:17,HT40-1:17,HT40-2:17,HT40-3:17,HT40-4:17,HT40-5:17,HT40-6:17,HT40-\
    7:17"
/interface wireless nstreme
set wlan1 disable-csma=no enable-nstreme=no enable-polling=yes framer-limit=\
    3200 framer-policy=none

Second point config:

/interface wireless
set [ find default-name=wlan1 ] adaptive-noise-immunity=none allow-sharedkey=\
    no ampdu-priorities=0 amsdu-limit=8192 amsdu-threshold=8192 antenna-gain=\
    0 area="" arp=enabled arp-timeout=auto band=2ghz-onlyn basic-rates-a/g="" \
    basic-rates-b="" bridge-mode=enabled channel-width=20/40mhz-Ce \
    compression=no country=russia default-ap-tx-limit=0 \
    default-authentication=yes default-client-tx-limit=0 default-forwarding=\
    yes disable-running-check=no disabled=no disconnect-timeout=3s distance=\
    dynamic frame-lifetime=0 frequency=2412 frequency-mode=superchannel \
    frequency-offset=0 guard-interval=any hide-ssid=no ht-basic-mcs=\
    mcs-0,mcs-1,mcs-2,mcs-3,mcs-4,mcs-5,mcs-6,mcs-7 ht-supported-mcs="mcs-0,mc\
    s-1,mcs-2,mcs-3,mcs-4,mcs-5,mcs-6,mcs-7,mcs-8,mcs-9,mcs-10,mcs-11,mcs-12,m\
    cs-13,mcs-14,mcs-15,mcs-16,mcs-17,mcs-18,mcs-19,mcs-20,mcs-21,mcs-22,mcs-2\
    3" hw-fragmentation-threshold=disabled hw-protection-mode=none \
    hw-protection-threshold=0 hw-retries=7 installation=any \
    interworking-profile=disabled keepalive-frames=enabled l2mtu=1600 \
    mac-address=B8:69:F4:35:06:22 max-station-count=2007 mode=station-wds \
    mtu=1500 multicast-buffering=disabled multicast-helper=default name=wlan1 \
    noise-floor-threshold=default nv2-cell-radius=30 nv2-downlink-ratio=50 \
    nv2-mode=dynamic-downlink nv2-noise-floor-offset=default \
    nv2-preshared-key=******** nv2-qos=default nv2-queue-count=2 \
    nv2-security=enabled nv2-sync-secret="" on-fail-retry-time=100ms \
    preamble-mode=both radio-name=B869F4350622 rate-selection=advanced \
    rate-set=configured rx-chains=0,1 scan-list=default secondary-channel="" \
    security-profile=default ssid=WB station-bridge-clone-mac=\
    00:00:00:00:00:00 station-roaming=enabled supported-rates-a/g="" \
    supported-rates-b="" tdma-period-size=2 tx-chains=0,1 tx-power=17 \
    tx-power-mode=all-rates-fixed update-stats-interval=disabled vlan-id=1 \
    vlan-mode=no-tag wds-cost-range=50-150 wds-default-bridge=none \
    wds-default-cost=100 wds-ignore-ssid=no wds-mode=disabled \
    wireless-protocol=nv2 wmm-support=disabled wps-mode=push-button
/interface wireless manual-tx-power-table
set wlan1 manual-tx-powers="1Mbps:17,2Mbps:17,5.5Mbps:17,11Mbps:17,6Mbps:17,9M\
    bps:17,12Mbps:17,18Mbps:17,24Mbps:17,36Mbps:17,48Mbps:17,54Mbps:17,HT20-0:\
    17,HT20-1:17,HT20-2:17,HT20-3:17,HT20-4:17,HT20-5:17,HT20-6:17,HT20-7:17,H\
    T40-0:17,HT40-1:17,HT40-2:17,HT40-3:17,HT40-4:17,HT40-5:17,HT40-6:17,HT40-\
    7:17"
/interface wireless nstreme
set wlan1 disable-csma=no enable-nstreme=no enable-polling=yes framer-limit=\
    3200 framer-policy=none

Bandwith test from base to second point:

Reply

Answer the question

In order to leave comments, you need to log in

[[+comments_count]] answer(s)

D

Dmitry Shitskov, 2019-03-30
@Zarom

Air pings are just great.
The 2.4 range is quite busy and many parameters can affect ccq. It may be worth trying to select the least loaded frequency range and fix it on the points. You can also use the nstream protocol instead of nv2. It should work better on point-to-point connections.
And finally, 5 GHz ...

N

Nikolai, 2019-03-30
@nevzorofff

Do you put it in an open field? Noise level -107 at 2.4 looks somehow unrealistic.
Align the signal by polarizations - 3db differences can give a strong drop, somewhere by a factor of two.
The next step is to turn down the power on the transmitters. -60 at the input of the receiver - very good.
And what prevents you from throwing a cable at 120m?