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.
| Time | Priority | Description | | 2020-08-07, 12:09:58.0 | Warning (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, 12:09:05.0 | Notice (6) | Honoring MDD; IP provisioning mode = IPv6 | | 2020-08-07, 12:08:47.0 | Critical (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, 10:48:25.0 | Critical (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, 10:48:25.0 | Critical (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, 10:48:25.0 | Critical (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, 10:38:55.0 | Notice (6) | Honoring MDD; IP provisioning mode = IPv6 | | 2020-08-07, 10:38:39.0 | Critical (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, 10:34:19.0 | Critical (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; |
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| Downstream Bonded Channels |
| Channel | Lock Status | Modulation | Channel ID | Frequency | Power | SNR | Correctables | Uncorrectables | | 1 | Locked | QAM256 | 21 | 621000000 Hz | -5.6 dBmV | 39.0 dB | 143 | 300 | | 2 | Locked | QAM256 | 22 | 627000000 Hz | -4.6 dBmV | 39.0 dB | 163 | 261 | | 3 | Locked | QAM256 | 23 | 633000000 Hz | -4.5 dBmV | 39.1 dB | 155 | 267 | | 4 | Locked | QAM256 | 24 | 639000000 Hz | -4.9 dBmV | 38.1 dB | 157 | 245 | | 5 | Locked | QAM256 | 25 | 645000000 Hz | -4.9 dBmV | 39.0 dB | 151 | 355 | | 6 | Locked | QAM256 | 26 | 651000000 Hz | -4.6 dBmV | 39.3 dB | 143 | 137 | | 7 | Locked | QAM256 | 27 | 657000000 Hz | -4.4 dBmV | 39.4 dB | 97 | 156 | | 8 | Locked | QAM256 | 28 | 663000000 Hz | -5.3 dBmV | 39.0 dB | 155 | 130 |
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| Upstream Bonded Channels |
| Channel | Lock Status | US Channel Type | Channel ID | Symbol Rate | Frequency | Power | | 1 | Locked | ATDMA | 5 | 5120 Ksym/sec | 35600000 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 |
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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
AC2k
Contributor
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18 Messages
5 years 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.
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ibecker17
New Poster
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3 Messages
5 years 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?
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ibecker17
New Poster
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3 Messages
5 years ago
Do you have any suggestions for replacing the coax cable? Thanks!
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