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alita99
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Wed, May 13, 2020 10:00 PM

CM1000 Critical (3) T3 Timeout and intermittent connectivity

Hello Community!

For the past week I've been struggling with intermittent connectivity. Sometimes I stay online for several hours, sometimes even a day, but more often than not, I find myself with no internet and serious loss productivity (especially with WFH these days).

 

I have been told that the things look OK from Comcast side and that the issue is my modem or something. I purchased this CM1000 from Amazon about 5 months back brand new. 

 

Could someone shed some light on if this is a modem issue or one of the engineers check the local node out? 

 

Thank you so much.

 

Time Priority Description
2020-05-13, 21:25:03 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:25:02 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 1;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:25:02 Critical (3) Ranging Request Retries exhausted;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:24:25 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:24:23 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 2;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:24:23 Critical (3) Ranging Request Retries exhausted;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:24:12 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:24:11 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:22:43 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:22:41 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 1;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:22:41 Critical (3) Ranging Request Retries exhausted;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:22:34 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:22:31 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:21:40 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:21:38 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 2;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:21:38 Critical (3) Ranging Request Retries exhausted;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:20:55 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:20:52 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:19:54 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:19:53 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 1;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:19:53 Critical (3) Ranging Request Retries exhausted;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:19:28 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:19:27 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 2;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:19:27 Critical (3) Ranging Request Retries exhausted;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:19:14 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:19:12 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:17:35 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:17:32 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:16:59 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:16:57 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 2;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:16:57 Critical (3) Ranging Request Retries exhausted;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:16:51 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:16:49 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 1;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:16:49 Critical (3) Ranging Request Retries exhausted;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:15:53 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:15:52 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:14:49 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:14:48 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 2;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:14:48 Critical (3) Ranging Request Retries exhausted;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;
2020-05-13, 21:14:16 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=28:80:88:ac:d7:b0;CMTS-MAC=00:38:df:08:ba:ae;CM-QOS=1.1;CM-VER=3.1;

 

Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 639000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Security Enable BPI+
IP Provisioning Mode Honor MDD IPv6 only
Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR / MER Unerrored Codewords Correctable Codewords Uncorrectable Codewords
1 Locked QAM256 29 639000000 Hz -1.3 dBmV 40.2 dB 687060402 0 0
2 Locked QAM256 1 459000000 Hz 0.4 dBmV 41.5 dB 684864984 0 0
3 Locked QAM256 2 465000000 Hz 0.4 dBmV 41.5 dB 684868832 0 0
4 Locked QAM256 3 471000000 Hz 1.8 dBmV 41.8 dB 684872286 0 0
5 Locked QAM256 4 477000000 Hz 2.7 dBmV 42.0 dB 684876401 0 0
6 Locked QAM256 5 483000000 Hz 4.2 dBmV 42.3 dB 684879795 0 0
7 Locked QAM256 6 489000000 Hz 6.0 dBmV 42.7 dB 684883051 0 0
8 Locked QAM256 7 495000000 Hz 8.1 dBmV 42.9 dB 684886764 0 0
9 Locked QAM256 8 507000000 Hz 6.0 dBmV 42.5 dB 684894525 0 0
10 Locked QAM256 9 513000000 Hz 4.1 dBmV 42.4 dB 684898059 0 0
11 Locked QAM256 10 519000000 Hz 2.4 dBmV 42.0 dB 684901854 0 0
12 Locked QAM256 11 525000000 Hz 1.1 dBmV 41.3 dB 684905902 0 0
13 Locked QAM256 12 531000000 Hz -1.1 dBmV 40.5 dB 684909922 0 0
14 Locked QAM256 13 543000000 Hz -1.6 dBmV 40.5 dB 684912984 0 0
15 Locked QAM256 14 549000000 Hz -1.3 dBmV 40.5 dB 684917005 0 0
16 Locked QAM256 15 555000000 Hz -1.3 dBmV 40.5 dB 684920168 0 0
17 Locked QAM256 16 561000000 Hz 0.2 dBmV 41.1 dB 684924271 0 0
18 Locked QAM256 17 567000000 Hz 0.5 dBmV 41.1 dB 684928339 0 0
19 Locked QAM256 18 573000000 Hz 2.1 dBmV 41.5 dB 684931193 0 0
20 Locked QAM256 19 579000000 Hz 4.2 dBmV 42.0 dB 684935484 0 0
21 Locked QAM256 20 585000000 Hz 7.0 dBmV 42.5 dB 684939122 0 0
22 Locked QAM256 21 591000000 Hz 8.1 dBmV 42.2 dB 684943144 0 0
23 Locked QAM256 22 597000000 Hz 7.1 dBmV 42.1 dB 684946473 0 0
24 Locked QAM256 23 603000000 Hz 5.3 dBmV 41.9 dB 684950600 0 0
25 Locked QAM256 24 609000000 Hz 2.9 dBmV 41.5 dB 684953940 0 0
26 Locked QAM256 25 615000000 Hz 1.8 dBmV 41.4 dB 684958121 0 0
27 Locked QAM256 26 621000000 Hz -0.4 dBmV 40.6 dB 684961269 0 0
28 Locked QAM256 27 627000000 Hz -0.1 dBmV 40.7 dB 684965038 0 0
29 Locked QAM256 28 633000000 Hz -0.9 dBmV 40.3 dB 684969202 0 0
30 Locked QAM256 30 645000000 Hz -1.2 dBmV 40.1 dB 684972728 0 0
31 Locked QAM256 31 651000000 Hz -0.2 dBmV 40.5 dB 684973630 0 0
32 Locked QAM256 32 657000000 Hz 0.4 dBmV 40.5 dB 684973537 0 0
Upstream Bonded Channels (Partial Service)
Channel Lock Status Modulation Channel ID Frequency Power
1 Locked ATDMA 1 17300000 Hz 48.8 dBmV
2 Locked ATDMA 2 23700000 Hz 48.8 dBmV
3 Locked ATDMA 3 30100000 Hz 57.0 dBmV
4 Locked ATDMA 4 36500000 Hz 46.8 dBmV
5 Locked ATDMA 5 41200000 Hz 47.3 dBmV
6 Not Locked Unknown 0 0 Hz 0.0 dBmV
7 Not Locked Unknown 0 0 Hz 0.0 dBmV
8 Not Locked Unknown 0 0 Hz 0.0 dBmV
Downstream OFDM Channels
Channel Lock Status Modulation / Profile ID Channel ID Frequency Power SNR / MER Active Subcarrier Number Range Unerrored Codewords Correctable Codewords Uncorrectable Codewords
1 Locked 0, 1 159 722000000 Hz 0.3 dBmV 23.3 dB 1126 ~ 2969 644947646 641670353 13
2 Not Locked 0 0 0 Hz 4.5 dBmV 0.0 dB 0 ~ 4095 0 0 0
Upstream OFDMA Channels
Channel Lock Status Modulation / Profile ID Channel ID Frequency Power
1 Not Locked Unknown 0 0 Hz 0 dBmV
2 Not Locked Unknown 0 0 Hz 0 dBmV
Current System Time: Wed May 13 21:32:01 2020
System Up Time: 4:12:19

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