Forum Discussion

Kay4's avatar
Kay4
On our wavelength
12 months ago
Solved

Packet Loss after VM outage

Two days ago we had one of those brief outages that took over an hour to recover from, having to factory reset modem and router. Ever since we've had packet losses, currently 16% using https://packetlosstest.com/

Is this due to whatever was going on at the time with VM, could it be an SNR, how do I get it fixed?

  • Client62's avatar
    Client62
    12 months ago

    The reported 16% packet loss may well be due to the choice of settings for : https://packetlosstest.com/ after all this test will record a packet as lost when it is delivered later that the chosen latency limit.

    Looking at the 3.0 DOCSIS Downstream stats, Power levels are at the very high end of the spectrum, but so far errors do not appear to be a problem. If the power rises further ( dBmV > 10 )  that would be a concern.

    Looking at the 3.0 DOCSIS Upstream stats, the QAM 32 on all channels indicates a local noise issue.

  • Kay4's avatar
    Kay4
    On our wavelength
    12 months ago
    Refresh data
    Item Status TypeChannel Overview Downstream Upstream
    Cable Modem StatusOnlineDOCSIS 3.0
    Primary downstream channelLockedSC-QAM
    DOCSIS 3.0 channels315
    DOCSIS 3.1 channels11
  • Kay4's avatar
    Kay4
    On our wavelength
    12 months ago
     

    3.0 Downstream channels

    Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
    13310000008.242QAM 25625
    213900000010.342QAM 2561
    31470000009.941QAM 2562
    41550000009.841QAM 2563
    51630000009.541QAM 2564
    61710000009.641QAM 2565
    71790000009.341QAM 2566
    81870000009.341QAM 2567
    91950000009.341QAM 2568
    102030000009.341QAM 2569
    112110000009.441QAM 25610
    122190000009.541QAM 25611
    132270000009.241QAM 25612
    142350000009.141QAM 25613
    152430000008.741QAM 25614
    162510000008.542QAM 25615
    172590000008.542QAM 25616
    18267000000942QAM 25617
    192750000009.542QAM 25618
    202830000009.642QAM 25619
    212910000009.242QAM 25620
    222990000008.842QAM 25621
    233070000008.542QAM 25622
    243150000008.342QAM 25623
    253230000008.242QAM 25624
    263390000008.542QAM 25626
    273470000008.642QAM 25627
    283550000008.642QAM 25628
    293630000008.641QAM 25629
    303710000008.741QAM 25630
    31379000000941QAM 25631

    3.0 Downstream channels

    Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors
    1Locked42613
    2Locked42636
    3Locked41931
    4Locked41829
    5Locked41628
    6Locked41523
    7Locked41618
    8Locked41417
    9Locked41314
    10Locked41116
    11Locked41215
    12Locked41314
    13Locked41116
    14Locked41214
    15Locked41215
    16Locked42314
    17Locked42115
    18Locked42215
    19Locked42115
    20Locked42214
    21Locked42414
    22Locked42314
    23Locked42413
    24Locked42413
    25Locked42314
    26Locked42315
    27Locked42613
    28Locked42413
    29Locked41414
    30Locked41513
    31Locked41513

    3.1 Downstream channels

    Channel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)
    33944K1840QAM 40961108

    3.1 Downstream channels

    Channel ID Locked Status RxMER Data (dB) PLC Power (dBmV) Corrected errors (Active Profile) Uncorrectable errors (Active Profile)
    33Locked438.24534689300
  • Kay4's avatar
    Kay4
    On our wavelength
    12 months ago

    3.0 Upstream channels

    Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID
    04960000038.55120QAM 321
    14310000038.35120QAM 322
    23660000038.55120QAM 323
    33010000038.55120QAM 324
    42360000038.85120QAM 325

    3.0 Upstream channels

    Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts
    0ATDMA0000
    1ATDMA0000
    2ATDMA0010
    3ATDMA0000
    4ATDMA0000

    3.1 Upstream channels

    Channel Channel Width (MHz) Power (dBmV) FFT Type Modulation
    61133.22KQAM 256

    3.1 Upstream channels

    Channel Channel Type Number of Active Subcarriers First Active Subcarrier (Hz) T3 Timeouts T4 Timeouts
    6OFDMA2207400000000
  • Kay4's avatar
    Kay4
    On our wavelength
    12 months ago

    General Configuration

    Network accessMaximum Number of CPEsBaseline PrivacyDOCSIS ModeConfig file
    Allowed
    1
    Enabled
    3.1
    cmreg-vmdg660-bbt057-b.cm

    Primary Downstream Service Flow

    SFIDMax Traffic RateMax Traffic BurstMin Traffic Rate
    38052
    143750047 bps
    42600bytes
    0 bps

    Primary Upstream Service Flow

    SFIDMax Traffic RateMax Traffic BurstMin Traffic RateMax Concatenated BurstScheduling Type
    38051
    22000047 bps
    42600bytes
    0 bps
    42600bytes
    Best Effort
  • Kay4's avatar
    Kay4
    On our wavelength
    12 months ago

    Network Log

    Time Priority Description
    14-02-2024 18:24:00noticeUS 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;
    14-02-2024 18:23:50noticeUS profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    14-02-2024 18:18:47noticeUS 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;
    14-02-2024 18:18:34noticeUS profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    14-02-2024 18:13:31noticeUS 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;
    14-02-2024 18:13:22noticeUS profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    14-02-2024 18:08:19noticeUS 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;
    14-02-2024 18:08:12noticeUS profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    14-02-2024 18:03:09noticeUS 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;
    14-02-2024 18:03:00noticeUS profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    14-02-2024 17:57:57noticeUS 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;
    14-02-2024 17:57:44noticeUS profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    14-02-2024 17:52:41noticeUS 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;
    14-02-2024 17:52:38noticeUS profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    14-02-2024 17:47:35noticeUS 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;
    14-02-2024 17:47:28noticeUS profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    14-02-2024 17:45:02warningRNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    14-02-2024 17:45:02warningDynamic Range Window violation
    14-02-2024 17:45:02warningRNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    14-02-2024 17:45:02warningRNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    14-02-2024 17:45:02warningDynamic Range Window violation
    14-02-2024 17:45:02warningDynamic Range Window violation
    14-02-2024 17:42:26warningRNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    14-02-2024 17:42:25noticeUS 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;
    14-02-2024 08:42:37warningRNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    13-02-2024 21:17:30noticeREGISTRATION COMPLETE - Waiting for Operational status
    13-02-2024 21:17:26criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    13-02-2024 21:17:24noticeUS profile assignment change. US Chan ID: 6; Previous Profile: 13; New Profile: 11 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    13-02-2024 21:17:19noticeDS 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;
    13-02-2024 21:17:15noticeTLV-11 - unrecognized OID;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    13-02-2024 21:17:13warningDHCP WARNING - Non-critical field invalid in response ;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
    13-02-2024 21:17:11noticeHonoring MDD; IP provisioning mode = IPv4
  • Client62's avatar
    Client62
    Alessandro Volta
    12 months ago

    The reported 16% packet loss may well be due to the choice of settings for : https://packetlosstest.com/ after all this test will record a packet as lost when it is delivered later that the chosen latency limit.

    Looking at the 3.0 DOCSIS Downstream stats, Power levels are at the very high end of the spectrum, but so far errors do not appear to be a problem. If the power rises further ( dBmV > 10 )  that would be a concern.

    Looking at the 3.0 DOCSIS Upstream stats, the QAM 32 on all channels indicates a local noise issue.

    • Kay4's avatar
      Kay4
      On our wavelength
      12 months ago

      If it is a local noise issue, can I do anything or is it just waiting to see if it improves

      • Paul_DN's avatar
        Paul_DN
        Forum Team
        12 months ago

        Hi Kay4,

        Thank you for reaching out to us in our community and welcome back, it has been quite a while, hope you have kept well, sorry to see you have been facing packet loss after an area fault, I was unable to locate you on our system with the details we have for you, so I can have a closer ;look to see if it is an area SNR issue, I have sent you an invite into a private chat, please look out for the white envelope to accept.

        Regards

        Paul.