ibecker17's profile

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3 Messages

Fri, Aug 7, 2020 11:00 AM

T3 and T4 timeouts

Hi there, I have been having issues for weeks now with the internet dropping for 5-10 minutes multiple times a day.  It usually only happens in the morning, sometimes in the afternoon.  It has steadily become more and more of an issue.  The logs below are from my modem/router.  I am using a NETGEAR Gateway C6220.

 

TimePriorityDescription
2020-08-07, 12:09:58.0Warning (5)MDD message timeout;CM-MAC=08:02:8e:84:7b:70;CMTS-MAC=00:01:5c:83:c0:5f;CM-QOS=1.1;CM-VER=3.0;
2020-08-07, 12:09:05.0Notice (6)Honoring MDD; IP provisioning mode = IPv6
2020-08-07, 12:08:47.0Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=08:02:8e:84:7b:70;CMTS-MAC=00:01:5c:83:c0:5f;CM-QOS=1.1;CM-VER=3.0;
2020-08-07, 10:48:25.0Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:02:8e:84:7b:70;CMTS-MAC=00:01:5c:83:c0:5f;CM-QOS=1.1;CM-VER=3.0;
2020-08-07, 10:48:25.0Critical (3)Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=08:02:8e:84:7b:70;CMTS-MAC=00:01:5c:83:c0:5f;CM-QOS=1.1;CM-VER=3.0;
2020-08-07, 10:48:25.0Critical (3)16 consecutive T3 timeouts while trying to range on upstream channel 3;CM-MAC=08:02:8e:84:7b:70;CMTS-MAC=00:01:5c:83:c0:5f;CM-QOS=1.1;CM-VER=3.0;
2020-08-07, 10:38:55.0Notice (6)Honoring MDD; IP provisioning mode = IPv6
2020-08-07, 10:38:39.0Critical (3)Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=08:02:8e:84:7b:70;CMTS-MAC=00:01:5c:83:c0:5f;CM-QOS=1.1;CM-VER=3.0;
2020-08-07, 10:34:19.0Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:02:8e:84:7b:70;CMTS-MAC=00:01:5c:83:c0:5f;CM-QOS=1.1;CM-VER=3.0;

 

Downstream Bonded Channels
ChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectablesUncorrectables
1LockedQAM25621621000000 Hz-5.6 dBmV39.0 dB143300
2LockedQAM25622627000000 Hz-4.6 dBmV39.0 dB163261
3LockedQAM25623633000000 Hz-4.5 dBmV39.1 dB155267
4LockedQAM25624639000000 Hz-4.9 dBmV38.1 dB157245
5LockedQAM25625645000000 Hz-4.9 dBmV39.0 dB151355
6LockedQAM25626651000000 Hz-4.6 dBmV39.3 dB143137
7LockedQAM25627657000000 Hz-4.4 dBmV39.4 dB97156
8LockedQAM25628663000000 Hz-5.3 dBmV39.0 dB155130

Upstream Bonded Channels
ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
1LockedATDMA55120 Ksym/sec35600000 Hz57.0 dBmV
2Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
3Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
4Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV

 

When I ran window diagnostics on the latest interruption, it said "windows can't communicate with the device or resource (primary dns server)"

 

EDIT: This occurs with both wired and wireless connections

Responses

AC2k

Frequent Visitor

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18 Messages

9 m ago

I'm having the same issue... I think we posted at about the same time.  It's also been much worse for me in the last month or so.

 

Not that I know anything or am any kind of expert (on anything) but your upstream level looks a bit high to me.  This usually means your modem is working harder and adding more power to get the signal out, at least that is my limited understanding.

 

If you are splitting the signal you could try removing the split and see if that number goes down.

 

Again, I don't really know anything but just stating what seemed to be the case for me.  My upstream numbers were creeping up to 55 so I removed the splitter the tech installed and now I don't see it go over 50.

 

I still have issues at the lower upstream levels though, so who knows.

New Poster

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3 Messages

9 m ago

Thanks for the quick reply.  I live in an apartment building, but there are at least two valid coax connections that I know of, so I assume there are some splitters somewhere. Is their removal something I could handle on my own?  I am going to purchase another coax cable for my modem/router since that is definitely something I can do.  What brand recommendations do you have?

New Poster

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3 Messages

9 m ago

Do you have any suggestions for replacing the coax cable?  Thanks!

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