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5 Messages
Frequent internet disconnects. Started Unicast Maintenance Ranging, No Response received, T3 timeout
As the title states, I am randomly losing internet connectivity rather frequently. Multiple times per day, connectivity drops for approximately 2-10 minutes. During this time, internet connectivity to external websites drops first, followed by connectivity to the modem.
The modem is a Netgear CM1000v2 modem, which is one of the xfinity approved modems with DOCSIS 3.1 for my gigabit internet package. Every time connectivity is lost, when I log into the modem and check the log, "Critical(3) Started Unicast Maintenance Ranging - No Response received - T3 time-out" is the most recent entry. The modem is connected to the coax outlet directly inside the house from where the coax from the pole enters the house. It is a direct connection, with no splitters, to the outside line.
In the process of troubleshooting, I have eliminated and removed all other devices from my network and plugged my laptop directly into the modem, and the problem still persists. Since COVID19, I have been working from home and this has been very annoying to keep getting dropped from meetings and calls.
Mynok
New Poster
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3 Messages
5 years ago
Startup Sequence
Startup Step Status Comment
Acquire Downstream Channel 453000000 Hz Locked
Upstream Connection OK Operational
Boot State OK Operational
Configuration File OK
Security Enabled BPI+
Connection Status
System Up Time 1 days 13h:41m:07s
Network Access Allowed
Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Freq. (MHz) Pwr (dBmV) SNR (dB) Corrected Uncorrected
1 Locked QAM256 1 453.0 1.9 41.1 48999 48863
2 Locked QAM256 2 459.0 2.1 41.2 47618 48285
3 Locked QAM256 3 465.0 2.3 41.4 46475 50185
4 Locked QAM256 4 471.0 2.3 41.4 47259 48251
5 Locked QAM256 5 477.0 2.5 41.5 47694 47879
6 Locked QAM256 6 483.0 2.7 41.6 47710 48293
7 Locked QAM256 7 489.0 2.9 41.6 48472 47355
8 Locked QAM256 8 513.0 3.3 42.0 50024 38068
9 Locked QAM256 9 519.0 3.4 42.0 48714 35785
10 Locked QAM256 10 525.0 3.4 41.8 46635 33204
11 Locked QAM256 11 531.0 3.4 42.0 45895 31550
12 Locked QAM256 12 537.0 3.6 42.1 43624 29043
13 Locked QAM256 13 543.0 3.4 41.8 40132 26878
14 Locked QAM256 14 549.0 3.3 41.6 38500 25324
15 Locked QAM256 15 555.0 3.1 41.0 33542 23541
16 Locked QAM256 16 561.0 2.0 40.1 29630 22034
Total 710923 604538
Upstream Bonded Channels
Channel Lock Status Channel Type Channel ID Symb. Rate (Ksym/sec) Freq. (MHz) Pwr (dBmV)
1 Locked ATDMA 2 5120 23.7 46.5
2 Not Locked Unknown 0 0 0 0.0
3 Not Locked Unknown 0 0 0 0.0
4 Not Locked Unknown 0 0 0 0.0
0
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Mynok
New Poster
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3 Messages
5 years ago
Fri Oct 09 19:54:14 2020 Warning (5) Lost MDD Timeout;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Fri Oct 09 19:54:24 2020 Critical (3) No UCDs Received - Timeout;;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Fri Oct 09 19:54:27 2020 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Fri Oct 09 19:54:34 2020 Warning (5) Lost MDD Timeout;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Fri Oct 09 19:54:44 2020 Critical (3) No UCDs Received - Timeout;;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Fri Oct 09 19:54:47 2020 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Fri Oct 09 19:54:58 2020 Notice (6) Honoring MDD; IP provisioning mode = IPv6
Fri Oct 09 19:55:12 2020 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=2c:86:d2:88:71:ce;CM-QOS=1.1;CM-VER=3.0;
Fri Oct 09 19:55:49 2020 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=2c:86:d2:88:71:ce;CM-QOS=1.1;CM-VER=3.0;
Fri Oct 09 19:55:52 2020 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=2c:86:d2:88:71:ce;CM-QOS=1.0;CM-VER=3.0;
Fri Oct 09 19:56:00 2020 Warning (5) Lost MDD Timeout;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Fri Oct 09 19:56:10 2020 Critical (3) No UCDs Received - Timeout;;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Fri Oct 09 19:56:11 2020 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Fri Oct 09 19:56:24 2020 Notice (6) Honoring MDD; IP provisioning mode = IPv6
Fri Oct 09 19:56:35 2020 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=2c:86:d2:88:71:ce;CM-QOS=1.1;CM-VER=3.0;
Fri Oct 09 19:57:12 2020 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=2c:86:d2:88:71:ce;CM-QOS=1.1;CM-VER=3.0;
Fri Oct 09 19:57:27 2020 Notice (6) Honoring MDD; IP provisioning mode = IPv6
Fri Oct 09 20:09:58 2020 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=2c:86:d2:88:71:ce;CM-QOS=1.1;CM-VER=3.0;
Fri Oct 09 20:10:13 2020 Notice (6) Honoring MDD; IP provisioning mode = IPv6
Fri Oct 09 20:10:30 2020 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=2c:86:d2:88:71:ce;CM-QOS=1.1;CM-VER=3.0;
Fri Oct 09 20:11:07 2020 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=2c:86:d2:88:71:ce;CM-QOS=1.1;CM-VER=3.0;
Fri Oct 09 20:11:21 2020 Notice (6) Honoring MDD; IP provisioning mode = IPv6
Fri Oct 09 20:11:35 2020 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=2c:86:d2:88:71:ce;CM-QOS=1.1;CM-VER=3.0;
Fri Oct 09 20:12:20 2020 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=2c:86:d2:88:71:ce;CM-QOS=1.1;CM-VER=3.0;
Fri Oct 09 20:12:35 2020 Notice (6) Honoring MDD; IP provisioning mode = IPv6
Fri Oct 09 20:12:48 2020 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=2c:86:d2:88:71:ce;CM-QOS=1.1;CM-VER=3.0;
Fri Oct 09 20:13:26 2020 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=2c:86:d2:88:71:ce;CM-QOS=1.1;CM-VER=3.0;
Fri Oct 09 20:13:36 2020 Warning (5) Lost MDD Timeout;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Fri Oct 09 20:13:46 2020 Critical (3) No UCDs Received - Timeout;;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Fri Oct 09 20:13:49 2020 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Fri Oct 09 20:14:00 2020 Notice (6) Honoring MDD; IP provisioning mode = IPv6
Sat Oct 10 06:11:07 2020 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=2c:86:d2:88:71:ce;CM-QOS=1.1;CM-VER=3.0;
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