Xfinity plant
Xfinity globe
Community Forum

Internet goes down on hot days. Modem log shows No Ranging Response received messages

New Poster

Internet goes down on hot days. Modem log shows No Ranging Response received messages

When temerature outside goes above 90 degrees , I am having internet connection problems. The modem log shows messages like this and restarts. It is very consistent most days when it is hot outside. 2018-7-11, 13:20:53 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CMTS-MAC=00:01:5c:6b:06:54;CM-QOS=1.1;CM-VER=3.0; 2018-7-11, 13:25:41 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CMTS-MAC=00:01:5c:6b:06:54;CM-QOS=1.1;CM-VER=3.0; 2018-7-11, 13:26:04 Critical (3) No Ranging Response received - T3 time-out;CMTS-MAC=00:01:5c:6b:06:54;CM-QOS=1.0;CM-VER=3.0 2018-7-11, 13:50:50 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CMTS-MAC=00:01:5c:6b:06:54;CM-QOS=1.1;CM-VER=3.0; 2018-7-11, 13:55:36 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CMTS-MAC=00:01:5c:6b:06:54;CM-QOS=1.1;CM-VER=3.0; 2018-7-11, 13:56:05 Critical (3) No Ranging Response received - T3 time-out;CMTS-MAC=00:01:5c:6b:06:54;CM-QOS=1.0;CM-VER=3.0; 2018-7-11, 13:56:23 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CMTS-MAC=00:01:5c:6b:06:54;CM-QOS=1.0;CM-VER=3.0; 2018-7-11, 13:56:30 Notice (6) Honoring MDD; IP provisioning mode = IPv6 2018-7-11, 13:56:46 Warning (5) ToD request sent - No Response received;CMTS-MAC=00:01:5c:6b:06:54;CM-QOS=1.0;CM-VER=3.0; 2018-7-11, 13:56:49 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CMTS-MAC=00:01:5c:6b:06:54;CM-QOS=1.1;CM-VER=3.0; What could be the possible cause? Could it be related to some cable issues?
Expert

Re: Internet goes down on hot days. Modem log shows No Ranging Response received messages

Post the signal stats as well. Please post the *Downstream Power Level*, the *Upstream Power Level*, and the *SNR* (Signal to Noise Ratio) numbers.


New Poster

Re: Internet goes down on hot days. Modem log shows No Ranging Response received messages

Thanks for the response.. Here are the details from Modem page Startup Procedure Procedure Status Comment Acquire Downstream Channel 519000000 Hz Locked Connectivity State OK Operational Boot State OK Operational Security Enabled BPI+ IP Provisioning Mode Honor MDD honorMdd(4) Downstream Bonded Channels Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables 1 Locked QAM256 9 519000000 Hz 1.5 dBmV 41.5 dB 73 196 2 Locked QAM256 7 507000000 Hz 1.2 dBmV 40.2 dB 8 34 3 Locked QAM256 10 525000000 Hz 1.3 dBmV 41.3 dB 6 31 4 Locked QAM256 11 531000000 Hz 1.2 dBmV 41.2 dB 11 80 5 Locked QAM256 12 537000000 Hz 1.4 dBmV 41.2 dB 10 52 6 Locked QAM256 13 543000000 Hz 1.2 dBmV 41 dB 16 77 7 Locked QAM256 14 549000000 Hz 0.7 dBmV 40.7 dB 9 54 8 Locked QAM256 16 561000000 Hz 0.9 dBmV 40.9 dB 10 82 9 Locked QAM256 17 567000000 Hz 0.4 dBmV 40.5 dB 11 44 10 Locked QAM256 18 573000000 Hz 0.1 dBmV 40.3 dB 8 58 11 Locked QAM256 19 579000000 Hz 0.2 dBmV 40.3 dB 6 42 12 Locked QAM256 20 585000000 Hz 0.2 dBmV 40.3 dB 7 30 13 Locked QAM256 21 591000000 Hz 0.1 dBmV 40.3 dB 9 30 14 Locked QAM256 23 603000000 Hz 0.1 dBmV 40.3 dB 10 60 15 Locked QAM256 24 609000000 Hz 0.1 dBmV 40.3 dB 4 38 16 Locked QAM256 25 615000000 Hz 0.3 dBmV 40.4 dB 14 47 Upstream Bonded Channels Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power 1 Locked ATDMA 57 5120 Ksym/sec 17300000 Hz 46 dBmV 2 Locked ATDMA 58 5120 Ksym/sec 23700000 Hz 46 dBmV 3 Locked ATDMA 59 5120 Ksym/sec 30300000 Hz 46.8 dBmV 4 Locked ATDMA 60 5120 Ksym/sec 36700000 Hz 47 dBmV
New Poster

Re: Internet goes down on hot days. Modem log shows No Ranging Response received messages

 
Downstream Bonded Channels
Channel     Lock Status     Modulation     Channel ID     Frequency     Power     SNR     Correctables     Uncorrectables
1    Locked    QAM256    9    519000000 Hz    1.5 dBmV    41.5 dB    73    196
2    Locked    QAM256    7    507000000 Hz    1.2 dBmV    40.2 dB    8    34
3    Locked    QAM256    10    525000000 Hz    1.3 dBmV    41.3 dB    6    31
4    Locked    QAM256    11    531000000 Hz    1.2 dBmV    41.2 dB    11    80
5    Locked    QAM256    12    537000000 Hz    1.4 dBmV    41.2 dB    10    52
6    Locked    QAM256    13    543000000 Hz    1.2 dBmV    41 dB    16    77
7    Locked    QAM256    14    549000000 Hz    0.7 dBmV    40.7 dB    9    54
8    Locked    QAM256    16    561000000 Hz    0.9 dBmV    40.9 dB    10    82
9    Locked    QAM256    17    567000000 Hz    0.4 dBmV    40.5 dB    11    44
10    Locked    QAM256    18    573000000 Hz    0.1 dBmV    40.3 dB    8    58
11    Locked    QAM256    19    579000000 Hz    0.2 dBmV    40.3 dB    6    42
12    Locked    QAM256    20    585000000 Hz    0.2 dBmV    40.3 dB    7    30
13    Locked    QAM256    21    591000000 Hz    0.1 dBmV    40.3 dB    9    30
14    Locked    QAM256    23    603000000 Hz    0.1 dBmV    40.3 dB    10    60
15    Locked    QAM256    24    609000000 Hz    0.1 dBmV    40.3 dB    4    38
16    Locked    QAM256    25    615000000 Hz    0.3 dBmV    40.4 dB    14    47
 
Upstream Bonded Channels
Channel     Lock Status     US Channel Type     Channel ID     Symbol Rate     Frequency     Power
1    Locked    ATDMA    57    5120 Ksym/sec    17300000 Hz    46 dBmV
2    Locked    ATDMA    58    5120 Ksym/sec    23700000 Hz    46 dBmV
3    Locked    ATDMA    59    5120 Ksym/sec    30300000 Hz    46.8 dBmV
4    Locked    ATDMA    60    5120 Ksym/sec    36700000 Hz    47 dBmV

Highlighted
Expert

Re: Internet goes down on hot days. Modem log shows No Ranging Response received messages

The stats were o/k at that snapshot in time but on the hottest part of a day, they may go out of spec. Heat makes the signals worse. Especially the upstream power. It is a tad on the high side. There may be a malfunctioning line amp (or other hardware) somewhere. You may want to consider booking a tech visit to come out and investigate for this one.