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C7800 Keeps Disconnecting and/or Very Slow
Our C7800 Nighthawk cable modem router recently started disconnecting or getting VERY slow speeds out of the blue. We purchased it in April 2021 and it worked flawlessly up until the middle of last m...
FURRYe38 any suggestions on my issue here?
You've still got some indications of line problems in the logs. And now your power is a touch high.
Not sure what splitter you had in line but your power jumped significantly from removing the one you have.
Try putting a decent quality double splitter back in line. Maybe a triple.
Just make sure its a decent quality. the channels you had issues with (hz not just channel number) cleared up but now others have errors.
Try that first.
and once you do that, clear the logs out so we know that anything new on there is from after the change. Not sure if you're log has events from befor the change.
If it doesn't help, the isp might need to check the line.
plemans this is the only one I've got access to at the moment and was the one I had on originally.
Is there a different one you'd recommend using?
I've got a MicroCenter nearby...
Just not quite a 7db one. You could get a double or triple and drop the power just a little bit less.
And make sure its on there tight on both ends. From changing splitters, your power cleaned up a bit on some of your channels and got worse on others.
So make sure its on there tight as well as check the end of the coax cable to make sure none of the foil or shield is hitting the copper wire.
Here's a look at the last few days with the new splitter. Internet has dropped on us a couple of times. Wish I knew more about these logs so I could tell what's going on. Any thoughts? plemans
CABLE CONNECTION
Starting Frequency Startup Procedure
Procedure Status Comment Acquire Downstream Channel 747000000 Hz Locked Connectivity State OK Operational Boot State OK Operational Security ENABLED BPI+ IP Provisioning Mode Honor MDD IPv4 only Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectabables 1 Locked QAM256 31 747000000 Hz 0.6 dBmV 38.8 dB 14386 2599 2 Locked QAM256 1 561000000 Hz 3.6 dBmV 41.2 dB 824 0 3 Locked QAM256 2 567000000 Hz 4.5 dBmV 42.1 dB 925 0 4 Locked QAM256 3 573000000 Hz 4.8 dBmV 42.1 dB 681 0 5 Locked QAM256 4 579000000 Hz 5.2 dBmV 42.3 dB 493 0 6 Locked QAM256 5 585000000 Hz 6.4 dBmV 42.7 dB 270 0 7 Locked QAM256 6 591000000 Hz 6.7 dBmV 42.6 dB 235 0 8 Locked QAM256 7 597000000 Hz 6.2 dBmV 42.4 dB 262 62 9 Locked QAM256 8 603000000 Hz 6.2 dBmV 42.5 dB 285 47 10 Locked QAM256 9 609000000 Hz 5.3 dBmV 42.1 dB 241 0 11 Locked QAM256 10 615000000 Hz 4.3 dBmV 41.5 dB 219 0 12 Locked QAM256 11 621000000 Hz 5.0 dBmV 41.6 dB 161 0 13 Locked QAM256 12 627000000 Hz 4.7 dBmV 41.8 dB 86 0 14 Locked QAM256 13 633000000 Hz 4.2 dBmV 41.4 dB 52 0 15 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 16 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 17 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 18 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 19 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 20 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 21 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 22 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 23 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 24 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 25 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 26 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 27 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 28 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 29 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 30 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 31 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 32 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power 1 Locked ATDMA 7 5120 Ksym/sec 31000000 Hz 44.5 dBmV 2 Locked ATDMA 5 2560 Ksym/sec 18000000 Hz 41.8 dBmV 3 Locked ATDMA 6 5120 Ksym/sec 24600000 Hz 43.3 dBmV 4 Locked ATDMA 8 5120 Ksym/sec 37400000 Hz 46.0 dBmV 5 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0 dBmV 6 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0 dBmV 7 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0 dBmV 8 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0 dBmV Downstream OFDM Channels
Channel Channel ID Indicator Subcarrier Zero Frequency Active Subcarrier Number Range Total Codewords Uncorrectable Codewords 1 32 Non-Primary 428600000 Hz 1528 ~ 2567 2480752 3337 2 0 Other 0 Hz 0 ~ 0 0 0 Upstream OFDMA Channels
Channel UpstreamIsMuted Ranging Status Subcarrier Zero Frequency Active Subcarrier Number Range Symbols Per Frame Tx Power 1 Other 0 Hz 0 ~ 0 0 0 dBmV 2 Other 0 Hz 0 ~ 0 0 0 dBmV EVENT LOG
2022-03-14, 21:00:38 Notice (6) DHCP Renew - lease parameters Time Protocol Servers modified;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-14, 21:00:38 Error (4) DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-14, 13:27:46 Warning (5) MDD message timeout;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-14, 07:19:22 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-13, 21:30:41 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 1;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-13, 21:30:41 Critical (3) Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-13, 21:29:52 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-13, 21:29:31 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 2;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-13, 21:29:31 Critical (3) Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-13, 21:28:43 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-13, 21:28:30 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 3;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-13, 21:28:30 Critical (3) Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-13, 21:28:04 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-13, 21:28:04 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 0;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-13, 21:28:04 Critical (3) Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-13, 21:26:56 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-13, 14:01:21 Error (4) DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-13, 13:26:38 Warning (5) MDD message timeout;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-12, 17:44:02 Notice (6) TLV-11 - unrecognized OID;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-12, 17:44:02 Warning (5) DHCP WARNING - Non-critical field invalid in response ;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-12, 17:43:56 Notice (6) Honoring MDD; IP provisioning mode = IPv4 2022-03-12, 17:43:49 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-12, 17:43:44 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-12, 17:43:44 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-12, 17:43:32 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-12, 17:43:31 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-12, 17:39:44 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-12, 17:39:44 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 3;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-12, 17:39:44 Critical (3) Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-12, 17:39:31 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1; 2022-03-12, 17:39:30 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 0;CM-MAC=9c:c9:eb:87:d9:b0;CMTS-MAC=00:01:5c:b7:10:91;CM-QOS=1.1;CM-VER=3.1;