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skeg808's avatar
skeg808
Joining in
11 months ago

Multiple short connection drops a day

I have been experiencing multiple short drops of connection (around 10 seconds) for the past week or two.

My setup is a Hub5 in modem mode connected to a UniFi UCG Max with multiple WiFi 7 access points. The main PC I use is hardwired to the network.


Below are the logs off the hub.

3.0 Downstream channels

Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
13060000000.240QAM 25622
21380000001.839QAM 2561
31460000001.939QAM 2562
41540000001.239QAM 2563
51620000000.739QAM 2564
61700000000.839QAM 2565
71780000001.139QAM 2566
81860000001.139QAM 2567
9194000000139QAM 2568
102020000000.839QAM 2569
11210000000139QAM 25610
122260000001.139QAM 25612
13234000000140QAM 25613
142420000000.940QAM 25614
152500000000.839QAM 25615
162580000000.639QAM 25616
172660000000.539QAM 25617
182740000001.340QAM 25618
192820000001.540QAM 25619
202900000001.640QAM 25620
212980000001.340QAM 25621
223140000000.140QAM 25623
233220000000.940QAM 25624
243300000001.440QAM 25625
253380000001.840QAM 25626
263460000001.840QAM 25627
273540000001.640QAM 25628
283620000001.640QAM 25629
293700000001.940QAM 25630
303780000001.640QAM 25631
313860000000.440QAM 25632

3.0 Downstream channels

Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors
1Locked4022961470
2Locked3961431326
3Locked3971044279
4Locked3924702355
5Locked3917402387
6Locked3927022489
7Locked3917322618
8Locked39123832727
9Locked3952161929
10Locked392871319803
11Locked3976195315
12Locked3912651455
13Locked4010111153
14Locked4020142317
15Locked3920551914
16Locked3920972037
17Locked3920871783
18Locked40289508303
19Locked4017531562
20Locked4014211342
21Locked401397990
22Locked40268384955
23Locked40262524757
24Locked40257124394
25Locked401011376
26Locked40247753871
27Locked40878398
28Locked401700751
29Locked40230773498
30Locked40230843349
31Locked401912629

3.1 Downstream channels

Channel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)
33924K1800QAM 40961128

3.1 Downstream channels

Channel ID Locked Status RxMER Data (dB) PLC Power (dBmV) Corrected errors (Active Profile) Uncorrectable errors (Active Profile)
33Locked410.729792129846905

 

3.0 Upstream channels

Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID
04960000045.85120QAM 641
14310000045.85120QAM 642
23660000045.35120QAM 643
330100000455120QAM 644
42360000044.85120QAM 645

3.0 Upstream channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts
0ATDMA0020
1ATDMA0000
2ATDMA0000
3ATDMA0000
4ATDMA0000

3.1 Upstream channels

Channel Channel Width (MHz) Power (dBmV) FFT Type Modulation
610.439.52KQAM 256

3.1 Upstream channels

Channel Channel Type Number of Active Subcarriers First Active Subcarrier (Hz) T3 Timeouts T4 Timeouts
6OFDMA2087400000000
 

Network Log

Time Priority Description
22-12-2024 12:14:15noticeGUI Login Status - Login Success from LAN interface
22-12-2024 12:13:56noticeGUI Login Status - Login Fail from LAN interface
22-12-2024 11:58:38errorDHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
21-12-2024 21:36:24noticeCM-STATUS message sent. Event Type Code: 24; Chan ID: 33; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
21-12-2024 21:34:09noticeCM-STATUS message sent. Event Type Code: 24; Chan ID: 33; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
21-12-2024 21:33:58noticeCM-STATUS message sent. Event Type Code: 22; Chan ID: 33; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
21-12-2024 21:32:37noticeCM-STATUS message sent. Event Type Code: 4; Chan ID: 1 2 3 4 5 6 7 8 9 10 12 13 14 15 16 17 18 19 20 21 23 24 25 26 27 28 29 30 31 32 33; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1
21-12-2024 21:32:37noticeCM-STATUS message sent. Event Type Code: 20; Chan ID: 33; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
21-12-2024 21:32:37noticeCM-STATUS message sent. Event Type Code: 5; Chan ID: 1 2 3 4 5 6 7 8 9 10 12 13 14 15 16 17 18 19 20 21 23 24 25 26 27 28 29 30 31 32; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM
21-12-2024 21:32:37noticeCM-STATUS message sent. Event Type Code: 23; Chan ID: 33; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
21-12-2024 21:32:35noticeCM-STATUS message sent. Event Type Code: 16; Chan ID: 33; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
21-12-2024 21:32:00warningRCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
21-12-2024 21:31:57criticalStarted Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
21-12-2024 21:31:24criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
21-12-2024 21:31:23criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
21-12-2024 21:31:23warningMDD message timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
20-12-2024 10:09:16noticeUS profile assignment change. US Chan ID: 6; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
20-12-2024 10:09:08noticeREGISTRATION COMPLETE - Waiting for Operational status
20-12-2024 10:08:59noticeDS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
20-12-2024 10:08:55noticeTLV-11 - unrecognized OID;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
20-12-2024 10:08:53warningDHCP WARNING - Non-critical field invalid in response ;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
20-12-2024 10:08:51noticeHonoring MDD; IP provisioning mode = IPv4
20-12-2024 10:08:42criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
20-12-2024 10:08:42criticalCable Modem Reboot because of - HW or Power-On Reset
13-12-2024 10:35:58criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
13-12-2024 10:35:50criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
13-12-2024 10:35:50criticalCable Modem Reboot because of - HW or Power-On Reset
01-11-2024 01:24:47criticalStarted Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
01-11-2024 01:24:13criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
01-11-2024 01:24:08criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
01-11-2024 01:24:08criticalCable Modem Reboot because of - Reboot Timezone Change
01-11-2024 01:21:19criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
23-10-2024 01:24:15criticalCable Modem Reboot because of - unknown
23-10-2024 01:24:15criticalSYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;

5 Replies

  • jbrennand's avatar
    jbrennand
    Very Insightful Person
    11 months ago

    Can you do this to start from a "blank sheet"...

    _________________

    Switch the Hub off and unplug it from the mains supply for five minutes. Whilst it's off, Do a quick check that all of your coax and ethernet cable connections are in nice and "finger" tight - at the Hub and wall box and also at any connectors etc. Disconnect all the connections and reconnect to be sure. Ensure there are no “unterminated cable loose ends. Also check that the internal wiring is ok with no kinking, chaffing or dog chews etc.
    Also when its light, check that all looks good with the outside cabling and wall box (no “staples, etc.,) piercing the cables.

    Then, switch the Hub back on and leave ~5 minutes When all done, check back in the settings and ensure that the RS error counts and T3 errors have all reset to 0. Then check every hour or so to see if they start reappearing - they shouldn't. If they do (particularly the postRS and T3 ones) you have a problem (noise) that only a Tech visit will sort.    Also check the Upstream QAM’s are all at 64.

    Also... If you haven’t already, set up a free, secure and “offlsite” - “Broadband Quality Monitor” to continually monitor the state of your connection and record any true network dropouts , latency issues, packet drops, etc - it will thus allow you to differentiate between those and simple wifi dropouts. It does it 24/7/365 and it keeps a visual record of any/all of your network disconnections, useful data to have to match to the Network logs (in your Hub settings) and also in discussions with VM - note it will take a few hours to start seeing a sensible picture - post up the “link” to the “share live graph”. Click the lower link (Share Live Graph) then, click generate. Copy the text in the Direct Link box, beware, there may be more text than you can see. On here click the Link icon (2 links chain to the left of the camera icon) In the URL box paste the link you copied and then click OK
    https://www.thinkbroadband.com/broadband/monitoring/quality

     

    • skeg808's avatar
      skeg808
      Joining in
      11 months ago

      I did a full reset and the counts have all gone back to 0 now. I will keep checking and see how it goes over the day today. Initially after about 10 minutes I can see some Pre RS errors but nothing Post RS. All the upstream channels are QAM 64.

      Here is the link to the the offsite quality monitor. It took me a while to figure out how to configure my firewall to allow pings from that server but I got it after a couple of hours of tinkering.

      https://www.thinkbroadband.com/broadband/monitoring/quality/share/0f641a96015d3ced7a5fe4b897a5e9569fc9cf59

      These are the disconnects over the last 24 hours.

      • jbrennand's avatar
        jbrennand
        Very Insightful Person
        11 months ago

        The BQM is showing only one disconnect - at ~9.00 for about 15 mins this morning - does that tally with your VM tally?

  • Client62's avatar
    Client62
    Alessandro Volta
    11 months ago

    Are the numbers of 3.0 Post RS Errors and 3.1 Uncorrectable Errors fairly static or still rising ?

    • skeg808's avatar
      skeg808
      Joining in
      11 months ago

      I did a quick compare before a full reset and over 20 hours or so there was a slight increase in some of the Pre RS errors but not the Post RS Errors.