Pause every 100 seconds?

RouterOS Wireless Networking
1

I’ve been working with an especially difficult link the last couple of weeks. The link conists of 3 MT routers. Each end has a brand new RB433AH. Each end has a single XR5, while the unit in the middle has 2 XR5 cards. Both links are 6-7km. Signal is -69 on both links, giving a 26db SNR. All 3 units are running 4.17.

Right now, I’m running a 5x1Mbit/s bandwidth test using tcp and random data. Everything runs smooth for 100 seconds, then it pauses for a second. You can set your watch by it.

I’ve tried both wireless packages, every protocol (802.11, nstreme, and nv2), the results are the same. I’ve tried hw retries, adaptive noise immunity, rts/cts, etc… nothing seems to help. With nv2/nstreme, I see 20 million frames, 300 million HW frames.

The frequencies are clear… but to be sure, I’ve tried several channels on both links.

Here’s a picture if it helps:
Capture3.PNG

2

Does the log have anything about the pause? Maybe a disconnect? If so, you might want to enable debug logging for the wireless for details.

/system logging
add topics=wireless,debug action=memory
3

I probably should have mentioned that in my first post. debug logging has been on since before bringing up the first link. Nothing in the logs regarding this.

Some additional information… the only client on this link, is a school. Their network guy is pretty vague about what applications they’re running over the link, but insists it’s wreaking havoc on database transactions, which is hard to believe from what I’ve been able to see in terms of overall performance and reliability.

Maybe I need to take a VOIP phone out there or haul my home PC to their site and play some counter-strike, which will actually let me hear or “feel” any jitter or dropped packets.

For just one leg of this… current AP configuration:

set 1 adaptive-noise-immunity=ap-and-client-mode allow-sharedkey=no antenna-gain=0 antenna-mode=ant-a area="" arp=enabled band=5ghz-a \
    basic-rates-a/g=6Mbps bridge-mode=enabled burst-time=disabled channel-width=20mhz 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 distance=dynamic frame-lifetime=0 frequency=5180 frequency-mode=\
    manual-txpower frequency-offset=0 hide-ssid=no hw-fragmentation-threshold=disabled hw-protection-mode=none \
    hw-protection-threshold=0 hw-retries=10 l2mtu=2290 mac-address=00:15:6D:68:B7:F2 max-station-count=2007 mode=bridge mtu=1500 \
    name=PTP_SPS noise-floor-threshold=default nv2-cell-radius=30 nv2-noise-floor-offset=default nv2-preshared-key="" nv2-qos=default \
    nv2-queue-count=2 nv2-security=disabled on-fail-retry-time=100ms periodic-calibration=default periodic-calibration-interval=60 \
    preamble-mode=both proprietary-extensions=post-2.9.25 radio-name=PTP_SPS rate-set=configured scan-list=default security-profile=\
    default ssid=VZ-PTP-SPS station-bridge-clone-mac=00:00:00:00:00:00 supported-rates-a/g=6Mbps,9Mbps,12Mbps,18Mbps,24Mbps,36Mbps \
    tdma-override-rate=disabled tdma-override-size=0 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=\
    802.11 wmm-support=disabled

Current CPE config:

    arp=enabled band=5ghz-a basic-rates-a/g=6Mbps bridge-mode=enabled burst-time=disabled \
    channel-width=20mhz 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 distance=dynamic frame-lifetime=0 \
    frequency=5200 frequency-mode=manual-txpower frequency-offset=0 hide-ssid=no \
    hw-fragmentation-threshold=disabled hw-protection-mode=none hw-protection-threshold=0 \
    hw-retries=15 l2mtu=2290 mac-address=00:15:6D:68:B7:EF max-station-count=2007 mode=station-wds \
    mtu=1500 name=BH-VZ noise-floor-threshold=default nv2-cell-radius=30 nv2-noise-floor-offset=\
    default nv2-preshared-key="" nv2-qos=default nv2-queue-count=2 nv2-security=disabled \
    on-fail-retry-time=100ms periodic-calibration=default periodic-calibration-interval=60 \
    preamble-mode=both proprietary-extensions=post-2.9.25 radio-name=SPS_BH-VZ rate-set=default \
    scan-list=default security-profile=default ssid=VZ-PTP-SPS station-bridge-clone-mac=\
    00:00:00:00:00:00 supported-rates-a/g=6Mbps,9Mbps,12Mbps,18Mbps,24Mbps,36Mbps,48Mbps,54Mbps \
    tdma-override-rate=disabled tdma-override-size=0 tdma-period-size=2 tx-power-mode=default \
    update-stats-interval=disabled wds-cost-range=50-150 wds-default-bridge=none wds-default-cost=\
    100 wds-ignore-ssid=no wds-mode=disabled wireless-protocol=nv2-nstreme-802.11 wmm-support=\
    disabled

CPE monitor:

                 status: connected-to-ess
                   band: 5ghz-a
              frequency: 5180MHz
      wireless-protocol: 802.11
                tx-rate: "24.0Mbps"
                rx-rate: "24.0Mbps"
                   ssid: "VZ-PTP-SPS"
                  bssid: 00:15:6D:68:B7:F2
             radio-name: "PTP_SPS"
        signal-strength: -70dBm
    signal-strength-ch0: -70dBm
     tx-signal-strength: -68dBm
            noise-floor: -100dBm
        signal-to-noise: 30dB
                 tx-ccq: 89%
                 rx-ccq: 100%
           p-throughput: 18057
         overall-tx-ccq: 89%
  authenticated-clients: 1
       current-distance: 5
               wds-link: yes
                nstreme: no
           framing-mode: none
       routeros-version: "4.17"
    802.1x-port-enabled: yes
  management-protection: no
            compression: no
      current-tx-powers: 6Mbps:27(17/27),9Mbps:27(17/27),12Mbps:27(17/27),18Mbps:27(17/27),
                         24Mbps:27(17/27),36Mbps:25(15/25),48Mbps:23(13/23),54Mbps:21(11/21)
    notify-external-fdb: no

Monitor from AP:

[admin@VZ_BH-BMRS_PTP-SPS] > /int wi monitor 1 once
                 status: running-ap
                   band: 5ghz-a
              frequency: 5180MHz
      wireless-protocol: 802.11
            noise-floor: -97dBm
         overall-tx-ccq: 100%
     registered-clients: 1
  authenticated-clients: 1
       current-distance: 5
      current-tx-powers: 6Mbps:27(17/27),9Mbps:27(17/27),12Mbps:27(17/27),18Mbps:27(17/27),24Mbps:27(17/27),36Mbps:25(15/25),
                         48Mbps:23(13/23),54Mbps:21(11/21)
    current-ofdm-errors: 402
    notify-external-fdb: yes
4

it could be winbox problem, try to monitor using the console if there is traffic.

5

yes, that looks like winbox having a hard time getting counters rather than traffic actually stopping. What happens when you run ICMP against it during the same time period?