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Frequent Disconnects - Unicast Maintenance Ranging - No Response received

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Regular Visitor

Frequent Disconnects - Unicast Maintenance Ranging - No Response received

Random Disconnects.  

TimePriorityDescription
2020-11-08, 12:11:36Notice (6)Honoring MDD; IP provisioning mode = IPv6
2020-11-08, 12:11:24Critical (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, 12:07:04Critical (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, 19:32:33Notice (6)Honoring MDD; IP provisioning mode = IPv6
2020-11-06, 19:32:22Critical (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, 19:28:02Critical (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, 19:14:55Critical (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, 19:14:55Critical (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, 19:14:55Critical (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, 11:23:13Critical (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, 11:23:13Critical (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, 11:23:13Critical (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, 11:16:26Critical (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, 11:16:26Critical (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, 11:16:26Critical (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, 11:10:27Critical (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, 11:10:27Critical (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, 11:10:27Critical (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, 11:09:50Critical (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, 11:09:50Critical (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, 11:09:50Critical (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, 11:09:34Critical (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, 11:09:34Critical (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, 11:09:34Critical (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, 11:09:13Critical (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, 11:09:13Critical (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, 11:09:13Critical (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, 00:29:13Critical (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, 00:29:13Critical (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, 00:29:13Critical (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, 00:23:09Critical (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, 00:23:09Critical (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, 00:23:09Critical (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, 00:22:33Critical (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, 00:22:33Critical (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, 00:22:33Critical (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, 00:22:01Critical (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, 00:22:01Critical (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, 00:22:01Critical (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, 21:44:59Notice (6)Honoring MDD; IP provisioning mode = IPv6

 

 

Startup Procedure
ProcedureStatusComment
Acquire Downstream Channel531000000 HzLocked
Connectivity StateOKOperational
Boot StateOKOperational
SecurityEnableBPI+
IP Provisioning ModeHonor MDDIPv6 only
 
<tabindex=-1>Downstream Bonded Channels</tabindex=-1>
ChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectablesUncorrectables
1LockedQAM25613531000000 Hz6.0 dBmV40.4 dB1287511782
2LockedQAM25614537000000 Hz6.3 dBmV40.6 dB1549311740
3LockedQAM25615543000000 Hz6.4 dBmV40.7 dB1466811078
4LockedQAM25616549000000 Hz6.2 dBmV40.7 dB1472111908
5LockedQAM25617555000000 Hz6.2 dBmV40.7 dB1432311030
6LockedQAM25618561000000 Hz6.1 dBmV40.7 dB1360211404
7LockedQAM25619567000000 Hz6.4 dBmV40.5 dB1325110640
8LockedQAM25620573000000 Hz6.1 dBmV40.7 dB1280510324
9LockedQAM25621579000000 Hz5.7 dBmV40.5 dB99349133
10LockedQAM25622585000000 Hz5.8 dBmV40.6 dB95419264
11LockedQAM25623591000000 Hz5.5 dBmV40.4 dB93169159
12LockedQAM25624597000000 Hz5.8 dBmV40.5 dB88838365
13LockedQAM25625603000000 Hz5.8 dBmV40.5 dB86638258
14LockedQAM25626609000000 Hz5.6 dBmV40.3 dB90129246
15LockedQAM25627615000000 Hz5.8 dBmV40.4 dB81478593
16LockedQAM25628621000000 Hz6.2 dBmV40.6 dB84658897
17LockedQAM25629627000000 Hz6.6 dBmV41.9 dB00
18LockedQAM25630633000000 Hz6.7 dBmV41.9 dB00
19LockedQAM25631639000000 Hz6.5 dBmV41.8 dB00
20LockedQAM25632645000000 Hz6.5 dBmV41.9 dB00
21LockedQAM25633651000000 Hz6.7 dBmV41.9 dB00
22LockedQAM25634657000000 Hz6.6 dBmV41.9 dB320
23LockedQAM25635663000000 Hz6.5 dBmV42.0 dB00
24LockedQAM25636669000000 Hz6.7 dBmV41.8 dB00
 
<tabindex=-1>Upstream Bonded Channels</tabindex=-1>
ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
1LockedATDMA45120 Ksym/sec16400000 Hz57.0 dBmV
2Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
3Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
4Not LockedUnknown00 Ksym/sec0 Hz0.0 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
Highlighted
Expert

Re: Frequent Disconnects - Unicast Maintenance Ranging - No Response received

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.



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I am a Customer Expert volunteering my time to help other customers here in the Forums.
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Highlighted
Regular Visitor

Re: Frequent Disconnects - Unicast Maintenance Ranging - No Response received

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?  

Highlighted
Expert

Re: Frequent Disconnects - Unicast Maintenance Ranging - No Response received

Call 1800comcast to book a visit. Good luck !



I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark the post as Best Answer!