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przemek3d's avatar
przemek3d
Aspirant
Sep 09, 2022

Orbi - unstable connection, no event logs

My Orbi system is unstable, the wifi disconnects often. I am getting many unstable connection notifications while having video calls. As a side note, I do not see any event logs. I saw them after I...
przemek3d's avatar
przemek3d
Aspirant
Sep 15, 2022

Hi FURRYe38, thanks for your help:

 

What Orbi model do you have? CBR750

 

What Firmware version is currently loaded? V4.6.5.8_2.0.54

 

What is the size of your home? Sq Ft? 3500


What is the distance between the router and satellite(s)? 30 feet or more, might be less than 30 feet in a straight line, but they are on separate floors, separated by walls - I can move it further

 

What channels are you using? Auto and 48 on 5Ghz

 

I did not answer the question about the modem router connection as this is one device. After I restarted the main router I saw the event logs for a day. Then they stopped appearing. There are also issues with NTP Settings. As I mentioned, the wifi connection becomes unstable - I need to manually switch between the primary and guest network, as one of them becomes unusable. Not sure if all of the above issues are related.

FURRYe38's avatar
FURRYe38
Guru - Experienced User
Sep 15, 2022

 

Please post a copy and paste of the modems connection status and event log page. Use a different browser if needed.

https://kb.netgear.com/30007/How-do-I-obtain-the-cable-connection-information-from-a-NETGEAR-cable-modem-modem-router
https://kb.netgear.com/30008/How-do-I-view-or-clear-the-event-logs-on-my-NETGEAR-cable-modem-or-modem-router

 

 

Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
Be sure there are no coax cable line splitters in the between the modem and ISP service box. 
Be sure your using good quality RG6 coax cable up to the modem. 
Be sure to power OFF the modem for 1 minute then back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Modems/m-p/1530376#M12853
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router?article=24311
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html

 

Try using channels 1 and 40. 

Try setting the transmit power to 50% on the CBR. Under Advanced Tab/Advanced Settings/Wireless Settings

  • przemek3d's avatar
    przemek3d
    Aspirant
    Sep 18, 2022

    Thanks for the help. I changed the channels to 1 and 40 and reduced the power to 50%. After reading the article, I noticed that one of the upstream channels might be problematic:

     

    6LockedATDMA62560 Ksym/sec40400000 Hz49.8 dBmV

     

    I also noticed quite often the following critical event.

    Sep 16 2022 22:08:07Critical (3)No Ranging Response received - T3 time-out

     

    I hope this is not an issue with my home wirings, as that would be hard to detect. There were multiple Comcast technicians checking my wirings and signal coming to the modem. They said it was ok.

     

    I'm attaching the cable connection (sorry for the format, it is hard to attach something readable here) to the post and pasting event logs below (they were usually missing):

     


    Time Priority Description
    Sep 16 2022 12:53:14 Notice (6) CM-STATUS message sent. Event Type Code: 5
    Sep 16 2022 12:53:14 Notice (6) CM-STATUS message sent. Event Type Code: 5
    Sep 16 2022 12:53:14 Notice (6) CM-STATUS message sent. Event Type Code: 5
    Sep 16 2022 12:53:14 Notice (6) CM-STATUS message sent. Event Type Code: 5
    Sep 16 2022 12:53:14 Notice (6) CM-STATUS message sent. Event Type Code: 5
    Sep 16 2022 12:53:14 Notice (6) CM-STATUS message sent. Event Type Code: 5
    Sep 16 2022 12:53:14 Notice (6) CM-STATUS message sent. Event Type Code: 5
    Sep 16 2022 12:53:14 Notice (6) CM-STATUS message sent. Event Type Code: 5
    Sep 16 2022 12:53:14 Notice (6) CM-STATUS message sent. Event Type Code: 5
    Sep 16 2022 13:06:58 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW
    Sep 16 2022 13:06:59 Notice (6) CM-STATUS message sent. Event Type Code: 5
    Sep 16 2022 13:26:56 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW
    Sep 16 2022 13:27:01 Notice (6) CM-STATUS message sent. Event Type Code: 5
    Sep 16 2022 13:32:56 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW
    Sep 16 2022 13:33:18 Notice (6) CM-STATUS message sent. Event Type Code: 5
    Sep 16 2022 13:38:55 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW
    Sep 16 2022 13:38:58 Notice (6) CM-STATUS message sent. Event Type Code: 5
    Sep 16 2022 13:48:54 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW
    Sep 16 2022 13:48:55 Notice (6) CM-STATUS message sent. Event Type Code: 5
    Sep 16 2022 22:08:07 Critical (3) No Ranging Response received - T3 time-out
    Sep 16 2022 22:46:25 Notice (6) CM-STATUS message sent. Event Type Code: 5
    Sep 17 2022 00:07:42 Alert (2) CM Certificate Error
    Sep 17 2022 00:10:23 Notice (6) CM-STATUS message sent. Event Type Code: 5
    Sep 17 2022 11:39:08 Critical (3) No Ranging Response received - T3 time-out
    Sep 17 2022 11:41:16 Notice (6) CM-STATUS message sent. Event Type Code: 5
    Sep 17 2022 13:23:18 Critical (3) No Ranging Response received - T3 time-out
    Sep 17 2022 13:35:56 Notice (6) CM-STATUS message sent. Event Type Code: 5
    Sep 17 2022 22:03:28 Critical (3) No Ranging Response received - T3 time-out
    Sep 17 2022 22:11:48 Notice (6) CM-STATUS message sent. Event Type Code: 5
    Sep 18 2022 00:07:41 Alert (2) CM Certificate Error
    Sep 18 2022 00:08:17 Notice (6) CM-STATUS message sent. Event Type Code: 5
    Time Not Established Critical (3) No Ranging Response received - T3 time-out
    Sep 18 2022 07:48:37 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
    Sep 18 2022 07:48:37 Notice (6) TLV-11 - unrecognized OID
    Sep 18 2022 07:48:37 Critical (3) Config File Rejected due to Invalid or Unexpected TLV 11
    Sep 18 2022 07:48:42 Warning (5) REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value
    Sep 18 2022 07:48:42 Warning (5) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW
    Sep 18 2022 07:48:42 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW
    Sep 18 2022 07:48:53 Alert (2) CM Certificate Error
    Sep 18 2022 09:07:40 Notice (6) CM-STATUS message sent. Event Type Code: 5
    Sep 18 2022 14:27:41 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
    Sep 18 2022 14:27:41 Notice (6) TLV-11 - unrecognized OID
    Sep 18 2022 14:27:41 Critical (3) Config File Rejected due to Invalid or Unexpected TLV 11
    Sep 18 2022 14:27:45 Warning (5) REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value
    Sep 18 2022 14:27:45 Warning (5) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW
    Sep 18 2022 14:27:46 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW
    Sep 18 2022 14:27:56 Alert (2) CM Certificate Error
    Sep 18 2022 14:37:46 Notice (6) CM-STATUS message sent. Event Type Code: 5

    • FURRYe38's avatar
      FURRYe38
      Guru - Experienced User
      Sep 19, 2022

      What the Correct and Un-Correctables look like on the cable connection status page? 

       

      You have Criticals and Warnings that the ISP needs to look into.

      If there are lots of numbers seen in the Correct and Un-correctables, this needs to be resolved as well as these should be mostly zeros seen here. 

      Be sure there are no coax cable line splitters in the between the modem and ISP service box. 
      Be sure your using good quality RG6 coax cable up to the modem. Check all fittings and connections. 

       

      Power levels are with in spec however could come up just a bit if the ISP can do that. 

      https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router?article=24311

      • przemek3d's avatar
        przemek3d
        Aspirant
        Sep 20, 2022

        The posts keep disappearing...

        Startup Procedure
        ProcedureStatusComment
        Acquire Downstream Channel423000000 HzLocked
        Connectivity StateOkOperational
        Boot StateOkOperational
        SecurityEnabledBPI+
        IP Provisioning ModeHonor MDDhonorMdd(4)
        Downstream Bonded Channels
        ChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectablesUncorrectable
        1LockedQAM 2561423000000 Hz0.0 dBmV40.9 dB8185
        2LockedQAM 2562429000000 Hz-0.2 dBmV40.9 dB10362
        3LockedQAM 2563435000000 Hz-0.5 dBmV40.3 dB11455
        4LockedQAM 2564441000000 Hz-0.9 dBmV40.9 dB14736
        5LockedQAM 2565447000000 Hz-0.7 dBmV40.9 dB10864
        6LockedQAM 2566453000000 Hz-0.2 dBmV40.3 dB9258
        7LockedQAM 2567459000000 Hz-0.5 dBmV40.9 dB17171470
        8LockedQAM 2568465000000 Hz-1.2 dBmV40.9 dB32854930
        9LockedQAM 2569471000000 Hz-2.9 dBmV38.9 dB2074114793
        10LockedQAM 25610477000000 Hz-9.2 dBmV34.3 dB3190973557
        11LockedQAM 25611483000000 Hz-8.5 dBmV34.3 dB5590690530
        12LockedQAM 25612489000000 Hz-3.2 dBmV38.9 dB7621346393
        13LockedQAM 25613495000000 Hz-1.5 dBmV40.3 dB3081217514
        14LockedQAM 25614507000000 Hz-0.5 dBmV40.9 dB11024
        15LockedQAM 25615513000000 Hz-0.2 dBmV40.3 dB520
        16LockedQAM 25616519000000 Hz-0.2 dBmV40.9 dB310
        17LockedQAM 25617525000000 Hz0.0 dBmV40.3 dB2111
        18LockedQAM 25618531000000 Hz0.0 dBmV40.3 dB380
        19LockedQAM 25619543000000 Hz0.2 dBmV40.3 dB270
        20LockedQAM 25620549000000 Hz0.2 dBmV40.3 dB310
        21LockedQAM 25621555000000 Hz0.2 dBmV40.9 dB284
        22LockedQAM 25622561000000 Hz0.0 dBmV40.3 dB275
        23LockedQAM 25623567000000 Hz0.0 dBmV38.6 dB260
        24LockedQAM 25624573000000 Hz0.0 dBmV38.9 dB330
        25LockedQAM 25625579000000 Hz0.0 dBmV40.9 dB290
        26LockedQAM 25626585000000 Hz0.0 dBmV40.3 dB410
        27LockedQAM 25627591000000 Hz0.2 dBmV40.9 dB420
        28LockedQAM 25628597000000 Hz0.2 dBmV40.3 dB628
        29LockedQAM 25629603000000 Hz0.0 dBmV40.3 dB380
        30LockedQAM 25630609000000 Hz0.0 dBmV40.3 dB496
        31LockedQAM 25631615000000 Hz0.0 dBmV40.9 dB628
        32LockedQAM 25632621000000 Hz0.0 dBmV40.9 dB312
        Upstream Bonded Channels
        ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
        1LockedATDMA12560 Ksym/sec10400000 Hz46.5 dBmV
        2LockedATDMA25120 Ksym/sec16400000 Hz43.8 dBmV
        3LockedATDMA35120 Ksym/sec22800000 Hz43.3 dBmV
        4LockedATDMA45120 Ksym/sec29200000 Hz43.8 dBmV
        5LockedATDMA55120 Ksym/sec35600000 Hz45.3 dBmV
        6LockedATDMA62560 Ksym/sec40400000 Hz48.8 dBmV
        7Not LockedN/AUnknown0 Ksym/sec0 Hz0.0 dBmV
        8Not LockedN/AUnknown0 Ksym/sec0 Hz0.0 dBmV
        Downstream OFDM Channels
        ChannelLock StatusModulation/Profile IDChannel IDFrequencyPowerSNR/MERActive Subcarrier
        Number Range        		Unerrored
        Codewords        		Correctable
        Codewords        		Uncorrectable
        Codewords
        1Locked3159722000000 Hz-1.9 dBmV40.9 dB1246~2849000
        2Not Locked000 Hz0.0 dBmV0.0 dB0~4095000
        Upstream OFDMA Channels
        ChannelLock StatusModulation/Profile IDChannel IDFrequencyPower
        1Not Locked000 Hz0.0 dBmV
        2Not Locked000 Hz0.0 dBmV