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JayQue2's avatar
JayQue2
Aspirant
Dec 01, 2019

c7000 T3/T4 timeouts & US Light blinking

So I"ve been having an ongoing  issue with my Comcast provided internet. The US light has been blinking with intermediate connections, modem reboots & slow speeds. Comcast techs cannot fix my issue s...
JayQue2's avatar
JayQue2
Aspirant
Dec 05, 2019

Nope. I read on this forum that some users of the CM1000 were having similar issues & it possibly being related to a CMTS needing to be updated or patched. Was hoping to get some insight on that with hopes of providing my ISP with something they can use to resolve my connection issue.

FURRYe38's avatar
FURRYe38
Guru - Experienced User
Dec 05, 2019

Maybe a forum moderator can comment. Again if this was happening with other modems, this seems to be an ISP issue as well.

vkdelta 

  • vkdelta's avatar
    vkdelta
    NETGEAR Employee Retired
    Dec 05, 2019

    Please post event logs and power table screenshots. 

    • JayQue2's avatar
      JayQue2
      Aspirant
      Dec 05, 2019

      Here you go. Hope this helps.

      Acquire Downstream Channel549000000 HzLocked
      Connectivity StateOKOperational
      Boot StateOKOperational
      SecurityEnabledBPI+
      IP Provisioning ModeHonor MDDhonorMdd(4)
       
      Downstream Bonded Channels
      ChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectablesUncorrectables
      1LockedQAM2565549000000 Hz3.1 dBmV41.3 dB00
      2LockedQAM25617621000000 Hz2.3 dBmV40 dB00
      3LockedQAM25618627000000 Hz2.6 dBmV40.1 dB00
      4LockedQAM25619633000000 Hz2.6 dBmV40.5 dB00
      5LockedQAM25620639000000 Hz2.5 dBmV40.3 dB00
      6LockedQAM25621645000000 Hz2.5 dBmV40.3 dB00
      7LockedQAM25622651000000 Hz2.6 dBmV40.3 dB00
      8LockedQAM25623657000000 Hz2.4 dBmV40.2 dB00
      9LockedQAM25624663000000 Hz2.2 dBmV40.2 dB00
      10LockedQAM2561525000000 Hz2.9 dBmV41.2 dB00
      11LockedQAM2562531000000 Hz3.1 dBmV41.4 dB00
      12LockedQAM2563537000000 Hz2.9 dBmV41.1 dB00
      13LockedQAM2564543000000 Hz2.9 dBmV41.2 dB00
      14LockedQAM2566555000000 Hz3 dBmV41.2 dB00
      15LockedQAM2567561000000 Hz2.9 dBmV41.1 dB00
      16LockedQAM2568567000000 Hz3 dBmV41.2 dB00
      17LockedQAM2569573000000 Hz3.1 dBmV43 dB00
      18LockedQAM25610579000000 Hz2.9 dBmV42.5 dB00
      19LockedQAM25611585000000 Hz2.9 dBmV42.5 dB00
      20LockedQAM25612591000000 Hz3.1 dBmV42.6 dB00
      21LockedQAM25613597000000 Hz2.9 dBmV42.5 dB00
      22LockedQAM25614603000000 Hz2.8 dBmV42.5 dB00
      23LockedQAM25615609000000 Hz2.7 dBmV42.5 dB00
      24LockedQAM25616615000000 Hz2.6 dBmV42.4 dB00
       
      Upstream Bonded Channels
      ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
      1LockedATDMA25120 Ksym/sec30100000 Hz47.5 dBmV
      2LockedATDMA15120 Ksym/sec36500000 Hz47.5 dBmV
      3LockedATDMA35120 Ksym/sec23700000 Hz47.5 dBmV
      4LockedATDMA45120 Ksym/sec17300000 Hz47.5 dBmV
      5Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
      6Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
      7Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
      8Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
       

       

      2019-12-4, 22:05:49Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:30:33:bb:64:c0;CMTS-MAC=00:59:dc:79:6b:22;CM-QOS=1.1;CM-VER=3.0;
      1970-1-1, 00:01:12Notice (6)Honoring MDD; IP provisioning mode = IPv6
      1970-1-1, 00:00:44Critical (3)No Ranging Response received - T3 time-out;CM-MAC=2c:30:33:bb:64:c0;CMTS-MAC=00:59:dc:79:6b:22;CM-QOS=1.0;CM-VER=3.0;
      1970-1-1, 00:00:40Notice (6)WiFi Interface [wl1] set to Channel 161 (Side-Band Channel:N/A) - Reason:INIT
      1970-1-1, 00:00:40Notice (6)WiFi Interface [wl0] set to Channel 11 (Side-Band Channel:N/A) - Reason:INIT
      1970-1-1, 00:00:37Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:30:33:bb:64:c0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
      2019-12-4, 16:54:27Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=2c:30:33:bb:64:c0;CMTS-MAC=00:59:dc:79:6b:22;CM-QOS=1.1;CM-VER=3.0;
      1970-1-1, 00:00:37Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:30:33:bb:64:c0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
      1970-1-1, 00:03:16Critical (3)No Ranging Response received - T3 time-out;CM-MAC=2c:30:33:bb:64:c0;CMTS-MAC=00:59:dc:79:6b:22;CM-QOS=1.0;CM-VER=3.0;
      1970-1-1, 00:03:09Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:30:33:bb:64:c0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
      1970-1-1, 00:03:08Critical (3)No UCDs Received - Timeout;;CM-MAC=2c:30:33:bb:64:c0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
      1970-1-1, 00:02:51Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:30:33:bb:64:c0;CMTS-MAC=00:59:dc:79:6b:22;CM-QOS=1.0;CM-VER=3.0;
      1970-1-1, 00:01:38Critical (3)No Ranging Response received - T3 time-out;CM-MAC=2c:30:33:bb:64:c0;CMTS-MAC=00:59:dc:79:6b:22;CM-QOS=1.0;CM-VER=3.0;
      1970-1-1, 00:01:32Critical (3)No UCDs Received - Timeout;;CM-MAC=2c:30:33:bb:64:c0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
      1970-1-1, 00:01:11Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:30:33:bb:64:c0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
      1970-1-1, 00:01:10Critical (3)SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=2c:30:33:bb:64:c0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
      1970-1-1, 00:00:59Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:30:33:bb:64:c0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
      1970-1-1, 00:00:58Critical (3)SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=2c:30:33:bb:64:c0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
      1970-1-1, 00:00:42Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:30:33:bb:64:c0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
      1970-1-1, 00:00:39Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=2c:30:33:bb:64:c0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
       
       
      • vkdelta's avatar
        vkdelta
        NETGEAR Employee Retired
        Dec 06, 2019

        T3 timeouts and "No UCDs Received " is concerning.

        Has ISP checked the noise on the Upstream/reverse path and confirmed?