Frequent Disconnects - Unicast Maintenance Ranging - No Response received

Random Disconnects.

Time	Priority	Description
2020-11-08, 12:11:36	Notice (6)	Honoring MDD; IP provisioning mode = IPv6
2020-11-08, 12:11:24	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-08, 12:07:04	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 19:32:33	Notice (6)	Honoring MDD; IP provisioning mode = IPv6
2020-11-06, 19:32:22	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 19:28:02	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 19:14:55	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 19:14:55	Critical (3)	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 19:14:55	Critical (3)	16 consecutive T3 timeouts while trying to range on upstream channel 4;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 11:23:13	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 11:23:13	Critical (3)	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 11:23:13	Critical (3)	16 consecutive T3 timeouts while trying to range on upstream channel 2;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 11:16:26	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 11:16:26	Critical (3)	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 11:16:26	Critical (3)	16 consecutive T3 timeouts while trying to range on upstream channel 4;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 11:10:27	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 11:10:27	Critical (3)	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 11:10:27	Critical (3)	16 consecutive T3 timeouts while trying to range on upstream channel 2;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 11:09:50	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 11:09:50	Critical (3)	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 11:09:50	Critical (3)	16 consecutive T3 timeouts while trying to range on upstream channel 3;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 11:09:34	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 11:09:34	Critical (3)	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 11:09:34	Critical (3)	16 consecutive T3 timeouts while trying to range on upstream channel 1;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 11:09:13	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 11:09:13	Critical (3)	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 11:09:13	Critical (3)	16 consecutive T3 timeouts while trying to range on upstream channel 4;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 00:29:13	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 00:29:13	Critical (3)	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 00:29:13	Critical (3)	16 consecutive T3 timeouts while trying to range on upstream channel 4;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 00:23:09	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 00:23:09	Critical (3)	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 00:23:09	Critical (3)	16 consecutive T3 timeouts while trying to range on upstream channel 2;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 00:22:33	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 00:22:33	Critical (3)	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 00:22:33	Critical (3)	16 consecutive T3 timeouts while trying to range on upstream channel 3;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 00:22:01	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 00:22:01	Critical (3)	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-06, 00:22:01	Critical (3)	16 consecutive T3 timeouts while trying to range on upstream channel 4;CM-MAC=10:da:43:f5:86:f1;CMTS-MAC=00:01:5c:7a:0a:57;CM-QOS=1.1;CM-VER=3.0;
2020-11-05, 21:44:59	Notice (6)	Honoring MDD; IP provisioning mode = IPv6

Startup Procedure

Procedure	Status	Comment
Acquire Downstream Channel	531000000 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	Correctables	Uncorrectables
1	Locked	QAM256	13	531000000 Hz	6.0 dBmV	40.4 dB	12875	11782
2	Locked	QAM256	14	537000000 Hz	6.3 dBmV	40.6 dB	15493	11740
3	Locked	QAM256	15	543000000 Hz	6.4 dBmV	40.7 dB	14668	11078
4	Locked	QAM256	16	549000000 Hz	6.2 dBmV	40.7 dB	14721	11908
5	Locked	QAM256	17	555000000 Hz	6.2 dBmV	40.7 dB	14323	11030
6	Locked	QAM256	18	561000000 Hz	6.1 dBmV	40.7 dB	13602	11404
7	Locked	QAM256	19	567000000 Hz	6.4 dBmV	40.5 dB	13251	10640
8	Locked	QAM256	20	573000000 Hz	6.1 dBmV	40.7 dB	12805	10324
9	Locked	QAM256	21	579000000 Hz	5.7 dBmV	40.5 dB	9934	9133
10	Locked	QAM256	22	585000000 Hz	5.8 dBmV	40.6 dB	9541	9264
11	Locked	QAM256	23	591000000 Hz	5.5 dBmV	40.4 dB	9316	9159
12	Locked	QAM256	24	597000000 Hz	5.8 dBmV	40.5 dB	8883	8365
13	Locked	QAM256	25	603000000 Hz	5.8 dBmV	40.5 dB	8663	8258
14	Locked	QAM256	26	609000000 Hz	5.6 dBmV	40.3 dB	9012	9246
15	Locked	QAM256	27	615000000 Hz	5.8 dBmV	40.4 dB	8147	8593
16	Locked	QAM256	28	621000000 Hz	6.2 dBmV	40.6 dB	8465	8897
17	Locked	QAM256	29	627000000 Hz	6.6 dBmV	41.9 dB	0	0
18	Locked	QAM256	30	633000000 Hz	6.7 dBmV	41.9 dB	0	0
19	Locked	QAM256	31	639000000 Hz	6.5 dBmV	41.8 dB	0	0
20	Locked	QAM256	32	645000000 Hz	6.5 dBmV	41.9 dB	0	0
21	Locked	QAM256	33	651000000 Hz	6.7 dBmV	41.9 dB	0	0
22	Locked	QAM256	34	657000000 Hz	6.6 dBmV	41.9 dB	32	0
23	Locked	QAM256	35	663000000 Hz	6.5 dBmV	42.0 dB	0	0
24	Locked	QAM256	36	669000000 Hz	6.7 dBmV	41.8 dB	0	0

Upstream Bonded Channels

Channel	Lock Status	US Channel Type	Channel ID	Symbol Rate	Frequency	Power
1	Locked	ATDMA	4	5120 Ksym/sec	16400000 Hz	57.0 dBmV
2	Not Locked	Unknown	0	0 Ksym/sec	0 Hz	0.0 dBmV
3	Not Locked	Unknown	0	0 Ksym/sec	0 Hz	0.0 dBmV
4	Not Locked	Unknown	0	0 Ksym/sec	0 Hz	0.0 dBmV
5	Not Locked	Unknown	0	0 Ksym/sec	0 Hz	0.0 dBmV
6	Not Locked	Unknown	0	0 Ksym/sec	0 Hz	0.0 dBmV
7	Not Locked	Unknown	0	0 Ksym/sec	0 Hz	0.0 dBmV
8	Not Locked	Unknown	0	0 Ksym/sec	0 Hz	0.0 dBmV

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Responses

EG

Expert

•

111.5K Messages

5 years ago

The upstream power is too high side /out of spec. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.

In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test

If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed, and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.

Black02sss

Regular Visitor

•

3 Messages

5 years ago

There are no splitters that I am aware of. I live in an apartment and just recently noticed the disconnects. Any other options? Would there be a tech that can come out and check the wiring or connections?

EG

Expert

•

111.5K Messages

5 years ago

Call 1800comcast to book a visit. Good luck !

Your Home Network

Black02sss

Frequent Disconnects - Unicast Maintenance Ranging - No Response received

EG

Black02sss

EG

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