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aaron5103
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Monday, September 21st, 2020 6:00 AM

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Network dropping sporadically, T3/T4 modem errors

I'm having issues with my new Netgear CM600 modem (coupled with a Eero router - both have been bought in the last 6 months as I'm trying to resolve this issue).  Several times a day my upload speed will drop to zero - my video conference calls will sound fine to me, but the folks I'm talking to complain that I'm breaking up so badley that they can't understand what I'm saying. Less frequently, download will drop entirely as well for ~5mins. Looking into my modem logs I see errors corresponding to the connectivity loss. I've had a tech out in the last month and he replaced the line into my house, and my modem is placed as upstream as it can be, with no splitters in the path.

 

Below I've posted my channel info and the event log from the most recent outage. I greatly appreciate any help that can be offered.

 

Startup Procedure
ProcedureStatusComment
Acquire Downstream Channel621000000 HzLocked
Connectivity StateOKOperational
Boot StateOKOperational
SecurityEnableBPI+
IP Provisioning ModeHonor MDDIPv6 only
 
Downstream Bonded Channels
ChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectablesUncorrectables
1LockedQAM25629621000000 Hz10.2 dBmV37.7 dB918315728927
2LockedQAM25641693000000 Hz11.5 dBmV38.0 dB11952171005645
3LockedQAM25642699000000 Hz11.5 dBmV37.9 dB1134424967278
4LockedQAM25643705000000 Hz11.4 dBmV37.7 dB1077725909350
5LockedQAM25644711000000 Hz11.2 dBmV37.7 dB1049234937814
6LockedQAM25625597000000 Hz10.2 dBmV38.2 dB1014380895387
7LockedQAM25626603000000 Hz10.4 dBmV38.2 dB997568859735
8LockedQAM25627609000000 Hz10.7 dBmV38.2 dB987441867534
9LockedQAM25628615000000 Hz10.4 dBmV38.0 dB955853830754
10LockedQAM25630627000000 Hz10.2 dBmV37.8 dB948553590737
11LockedQAM25631633000000 Hz10.8 dBmV38.0 dB959874567346
12LockedQAM25632639000000 Hz10.6 dBmV37.8 dB973733641602
13LockedQAM25633645000000 Hz10.8 dBmV37.9 dB964403717460
14LockedQAM25634651000000 Hz11.3 dBmV37.9 dB885084732896
15LockedQAM25635657000000 Hz11.3 dBmV37.9 dB840544704375
16LockedQAM25636663000000 Hz11.5 dBmV38.0 dB777993605079
17LockedQAM25637669000000 Hz11.3 dBmV38.6 dB1360
18LockedQAM25638675000000 Hz11.7 dBmV38.6 dB8426
19LockedQAM25639681000000 Hz11.8 dBmV38.6 dB610
20LockedQAM25640687000000 Hz11.6 dBmV38.7 dB590
21LockedQAM25621573000000 Hz9.9 dBmV38.6 dB230
22LockedQAM25622579000000 Hz10.0 dBmV39.0 dB00
23LockedQAM25623585000000 Hz10.2 dBmV39.1 dB00
24LockedQAM25624591000000 Hz10.2 dBmV39.1 dB180
 
Upstream Bonded Channels
ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
1LockedATDMA95120 Ksym/sec35600000 Hz39.5 dBmV
2LockedATDMA105120 Ksym/sec29200000 Hz38.8 dBmV
3LockedATDMA115120 Ksym/sec22800000 Hz39.0 dBmV
4LockedATDMA125120 Ksym/sec16400000 Hz38.8 dBmV
5LockedATDMA131280 Ksym/sec39600000 Hz37.5 dBmV
6Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
7Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
8Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV

 

Event log:

TimePriorityDescription
2020-09-20, 20:35:47Warning (5)Dynamic Range Window violation
2020-09-20, 16:35:42Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=38:94:ed:75:39:30;CMTS-MAC=00:56:2b:77:61:ce;CM-QOS=1.1;CM-VER=3.0;
2020-09-20, 16:34:37Critical (3)Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=38:94:ed:75:39:30;CMTS-MAC=00:56:2b:77:61:ce;CM-QOS=1.1;CM-VER=3.0;
2020-09-20, 16:34:26Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=38:94:ed:75:39:30;CMTS-MAC=00:56:2b:77:61:ce;CM-QOS=1.1;CM-VER=3.0;
2020-09-20, 13:34:29Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=38:94:ed:75:39:30;CMTS-MAC=00:56:2b:77:61:ce;CM-QOS=1.1;CM-VER=3.0;
2020-09-20, 13:33:24Critical (3)Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=38:94:ed:75:39:30;CMTS-MAC=00:56:2b:77:61:ce;CM-QOS=1.1;CM-VER=3.0;
2020-09-20, 11:42:15Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=38:94:ed:75:39:30;CMTS-MAC=00:56:2b:77:61:ce;CM-QOS=1.1;CM-VER=3.0;
2020-09-20, 11:42:00Warning (5)Dynamic Range Window violation
2020-09-17, 17:37:42Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=38:94:ed:75:39:30;CMTS-MAC=00:56:2b:77:61:ce;CM-QOS=1.1;CM-VER=3.0;
2020-09-17, 17:05:05Warning (5)Dynamic Range Window violation
2020-09-17, 16:28:17Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=38:94:ed:75:39:30;CMTS-MAC=00:56:2b:77:61:ce;CM-QOS=1.1;CM-VER=3.0;
2020-09-17, 15:51:12Warning (5)Dynamic Range Window violation
2020-09-17, 14:35:00Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=38:94:ed:75:39:30;CMTS-MAC=00:56:2b:77:61:ce;CM-QOS=1.1;CM-VER=3.0;
2020-09-17, 14:34:46Warning (5)Dynamic Range Window violation
2020-09-17, 13:15:03Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=38:94:ed:75:39:30;CMTS-MAC=00:56:2b:77:61:ce;CM-QOS=1.1;CM-VER=3.0;
2020-09-17, 13:13:26Critical (3)Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=38:94:ed:75:39:30;CMTS-MAC=00:56:2b:77:61:ce;CM-QOS=1.1;CM-VER=3.0;
2020-09-17, 13:13:10Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=38:94:ed:75:39:30;CMTS-MAC=00:56:2b:77:61:ce;CM-QOS=1.1;CM-VER=3.0;
2020-09-17, 13:04:10Warning (5)Dynamic Range Window violation
2020-09-17, 12:46:51Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=38:94:ed:75:39:30;CMTS-MAC=00:56:2b:77:61:ce;CM-QOS=1.1;CM-VER=3.0;
2020-09-17, 12:45:46Critical (3)Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=38:94:ed:75:39:30;CMTS-MAC=00:56:2b:77:61:ce;CM-QOS=1.1;CM-VER=3.0;
2020-09-17, 12:44:25Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=38:94:ed:75:39:30;CMTS-MAC=00:56:2b:77:61:ce;CM-QOS=1.1;CM-VER=3.0;
2020-09-17, 12:42:47Critical (3)Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=38:94:ed:75:39:30;CMTS-MAC=00:56:2b:77:61:ce;CM-QOS=1.1;CM-VER=3.0;
2020-09-17, 12:42:31Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=38:94:ed:75:39:30;CMTS-MAC=00:56:2b:77:61:ce;CM-QOS=1.1;CM-VER=3.0;
2020-09-17, 12:18:18Warning (5)Dynamic Range Window violation
2020-09-17, 12:14:31Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=38:94:ed:75:39:30;CMTS-MAC=00:56:2b:77:61:ce;CM-QOS=1.1;CM-VER=3.0;
2020-09-17, 12:12:54Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=38:94:ed:75:39:30;CMTS-MAC=00:56:2b:77:61:ce;CM-QOS=1.1;CM-VER=3.0;
2020-09-17, 12:11:49Critical (3)Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=38:94:ed:75:39:30;CMTS-MAC=00:56:2b:77:61:ce;CM-QOS=1.1;CM-VER=3.0;
2020-09-17, 12:11:15Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=38:94:ed:75:39:30;CMTS-MAC=00:56:2b:77:61:ce;CM-QOS=1.1;CM-VER=3.0;
2020-09-17, 12:10:10Critical (3)Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=38:94:ed:75:39:30;CMTS-MAC=00:56:2b:77:61:ce;CM-QOS=1.1;CM-VER=3.0;
2020-09-17, 12:09:35Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=38:94:ed:75:39:30;CMTS-MAC=00:56:2b:77:61:ce;CM-QOS=1.1;CM-VER=3.0;
2020-09-17, 12:08:30Critical (3)Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=38:94:ed:75:39:30;CMTS-MAC=00:56:2b:77:61:ce;CM-QOS=1.1;CM-VER=3.0;
2020-09-17, 11:46:38Warning (5)Dynamic Range Window violation
2020-09-17, 10:25:25Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=38:94:ed:75:39:30;CMTS-MAC=00:56:2b:77:61:ce;CM-QOS=1.1;CM-VER=3.0;
2020-09-17, 10:24:20Critical (3)Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=38:94:ed:75:39:30;CMTS-MAC=00:56:2b:77:61:ce;CM-QOS=1.1;CM-VER=3.0;
2020-09-17, 05:13:14Warning (5)Dynamic Range Window violation
2020-09-16, 23:27:28Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=38:94:ed:75:39:30;CMTS-MAC=00:56:2b:77:61:ce;CM-QOS=1.1;CM-VER=3.0;
2020-09-16, 14:27:35Warning (5)Dynamic Range Window violation
2020-09-16, 12:28:24Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=38:94:ed:75:39:30;CMTS-MAC=00:56:2b:77:61:ce;CM-QOS=1.1;CM-VER=3.0;
2020-09-16, 00:50:18Warning (5)Dynamic Range Window violation
2020-09-16, 00:32:12Notice (6)Honoring MDD; IP provisioning mode = IPv6

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