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Internet connection drops several times a day. Usually around 8pm, midnight, and late morning
I am hoping the forum can help because I am getting so tired of going to xfinity support who only seem to be able to say "perhaps if we reset your modem..." Because Xfinity had me thinking I had a bad modem and because it was showing as outdated on Xfinity's list, I recently replaced it with a Netgear CM2050V. This did not solve any problems. What we are experiencing is network outages lasting from 10 to 30 minutes, one to several times a day. The most common symptom is a DNS error - but I have learned that this is because there has been a timeout after a DNS request. Here are the modem diagnostics. I've spoken to Xfinity support multiple times and all they can seem to do is reset the modem. I had a tech (finally) come out to the house and say all the signal levels at the POP were fine, but he did not look at the modem values at all. Here is the info, I am hoping that someone might be able to offer some advice or suggestions.
This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect.
Starting Frequency
0
Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 651000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Security Enabled BPI+
Downstream Bonded Channels (Partial Service)
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 37 651000000 Hz -1.7 dBmV 37.5 dB 2 0
2 Locked QAM256 13 507000000 Hz -2.0 dBmV 38.3 dB 0 0
3 Locked QAM256 14 513000000 Hz -1.9 dBmV 38.4 dB 0 0
4 Locked QAM256 15 519000000 Hz -2.1 dBmV 38.4 dB 0 0
5 Locked QAM256 16 525000000 Hz -2.2 dBmV 38.3 dB 1 0
6 Locked QAM256 17 531000000 Hz -2.4 dBmV 38.1 dB 0 0
7 Locked QAM256 18 537000000 Hz -2.6 dBmV 38.1 dB 0 0
8 Locked QAM256 19 543000000 Hz -2.4 dBmV 38.0 dB 0 0
9 Locked QAM256 20 549000000 Hz -2.5 dBmV 38.0 dB 0 0
10 Locked QAM256 21 555000000 Hz -2.1 dBmV 38.0 dB 0 0
11 Locked QAM256 22 561000000 Hz -1.9 dBmV 38.1 dB 1 0
12 Locked QAM256 23 567000000 Hz -1.8 dBmV 38.1 dB 3 0
13 Locked QAM256 24 573000000 Hz -1.7 dBmV 38.0 dB 2 0
14 Locked QAM256 25 579000000 Hz -1.9 dBmV 38.0 dB 1 0
15 Locked QAM256 26 585000000 Hz -1.9 dBmV 37.9 dB 0 0
16 Locked QAM256 27 591000000 Hz -2.1 dBmV 37.9 dB 6 0
17 Locked QAM256 28 597000000 Hz -2.1 dBmV 37.8 dB 3 0
18 Locked QAM256 29 603000000 Hz -1.7 dBmV 37.8 dB 3 0
19 Locked QAM256 30 609000000 Hz -1.8 dBmV 37.8 dB 3 0
20 Locked QAM256 31 615000000 Hz -1.2 dBmV 37.9 dB 3 0
21 Locked QAM256 32 621000000 Hz -1.1 dBmV 37.9 dB 4 0
22 Locked QAM256 33 627000000 Hz -1.2 dBmV 37.9 dB 5 0
23 Locked QAM256 34 633000000 Hz -1.1 dBmV 37.8 dB 8 0
24 Locked QAM256 35 639000000 Hz -1.8 dBmV 37.6 dB 2 0
25 Locked QAM256 36 645000000 Hz -1.6 dBmV 37.5 dB 6 0
26 Locked QAM256 38 657000000 Hz -1.7 dBmV 37.6 dB 4 0
27 Locked QAM256 39 663000000 Hz -1.3 dBmV 37.7 dB 2 0
28 Locked QAM256 40 669000000 Hz -1.6 dBmV 37.5 dB 6 0
29 Locked QAM256 41 675000000 Hz -1.0 dBmV 37.4 dB 5 0
30 Locked QAM256 42 681000000 Hz -1.1 dBmV 37.5 dB 4 0
31 Locked QAM256 43 687000000 Hz -1.5 dBmV 37.5 dB 7 0
32 Locked QAM256 44 693000000 Hz -1.4 dBmV 37.4 dB 4 0
Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 1 5120 16400000 Hz 51.3 dBmV
2 Locked ATDMA 2 5120 22800000 Hz 50.8 dBmV
3 Locked ATDMA 3 5120 29200000 Hz 49.8 dBmV
4 Locked ATDMA 4 5120 35600000 Hz 49.8 dBmV
5 Locked ATDMA 5 2560 40400000 Hz 49.8 dBmV
6 Not Locked Unknown 0 0 0 Hz 0.0 dBmV
7 Not Locked Unknown 0 0 0 Hz 0.0 dBmV
8 Not Locked Unknown 0 0 0 Hz 0.0 dBmV
Downstream OFDM Channels
Channel Lock Status Profile ID Channel ID Frequency Power SNR / MER Active Subcarrier Unerrored Correctable Uncorrectable
Number Range Codewords Codewords Codewords
1 Locked 0 ,1 ,2 ,3 159 722000000 Hz 1.3 dBmV 36.9 dB 1186 ~ 2909 106750700 100578360 0
2 Not Locked 0 0 0 Hz 0 dBmV 0.0 dB 0 ~ 4095 0 0 0
Upstream OFDMA Channels
Channel Lock Status Modulation / Profile ID Channel ID Frequency Power
1 Not Locked 0 0 0 Hz 0 dBmV
2 Not Locked 0 0 0 Hz 0 dBmV
Clear Log Refresh Export
Time Priority Description
Sun Nov 28 17:56:56 2021 (Notice (6)) CM-STATUS message sent. Event Type Code: 1; Chan ID: 39; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
Sun Nov 28 17:56:55 2021 (Warning (5)) MDD message timeout;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
Sun Nov 28 17:56:51 2021 (Notice (6)) CM-STATUS message sent. Event Type Code: 5; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
Sun Nov 28 17:56:44 2021 (Warning (5)) Dynamic Range Window violation
Sun Nov 28 17:56:44 2021 (Warning (5)) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
Sun Nov 28 17:56:43 2021 (Warning (5)) REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
Sun Nov 28 17:56:37 2021 (Notice (6)) DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
Sun Nov 28 17:56:32 2021 (Notice (6)) TLV-11 - unrecognized OID;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
Time Not Established (Notice (6)) Honoring MDD; IP provisioning mode = IPv6
Time Not Established (Critical (3)) No Ranging Response received - T3 time-out;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
Time Not Established (Critical (3)) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=X;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Tue Nov 23 14:35:50 2021 (Notice (6)) CM-STATUS message sent. Event Type Code: 5; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
Tue Nov 23 14:35:38 2021 (Warning (5)) REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
Tue Nov 23 14:35:33 2021 (Notice (6)) DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
Tue Nov 23 14:35:28 2021 (Notice (6)) TLV-11 - unrecognized OID;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
Time Not Established (Notice (6)) Honoring MDD; IP provisioning mode = IPv6
Time Not Established (Critical (3)) No Ranging Response received - T3 time-out;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
Time Not Established (Critical (3)) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=X;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Mon Nov 22 13:25:55 2021 (Notice (6)) CM-STATUS message sent. Event Type Code: 5; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
Mon Nov 22 13:25:44 2021 (Warning (5)) REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
Mon Nov 22 13:25:38 2021 (Notice (6)) DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
Mon Nov 22 13:25:33 2021 (Notice (6)) TLV-11 - unrecognized OID;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
Time Not Established (Notice (6)) Honoring MDD; IP provisioning mode = IPv6
Time Not Established (Critical (3)) No Ranging Response received - T3 time-out;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
Time Not Established (Critical (3)) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=X;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Mon Nov 22 13:07:34 2021 (Notice (6)) CM-STATUS message sent. Event Type Code: 5; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
Mon Nov 22 13:07:23 2021 (Warning (5)) Dynamic Range Window violation
Mon Nov 22 13:07:23 2021 (Warning (5)) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
Mon Nov 22 13:07:22 2021 (Warning (5)) REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
Mon Nov 22 13:07:17 2021 (Notice (6)) DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
Mon Nov 22 13:07:16 2021 (Notice (6)) TLV-11 - unrecognized OID;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
Mon Nov 22 13:07:06 2021 (Notice (6)) Honoring MDD; IP provisioning mode = IPv6
Mon Nov 22 13:06:55 2021 (Critical (3)) No Ranging Response received - T3 time-out;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
Mon Nov 22 13:06:44 2021 (Critical (3)) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=X;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Mon Nov 22 13:06:41 2021 (Warning (5)) Lost MDD Timeout;CM-MAC=X;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Mon Nov 22 13:06:15 2021 (Critical (3)) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
Mon Nov 22 13:05:38 2021 (Warning (5)) REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
Mon Nov 22 13:05:34 2021 (Notice (6)) DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
Mon Nov 22 13:05:33 2021 (Critical (3)) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
Mon Nov 22 13:05:26 2021 (Notice (6)) TLV-11 - unrecognized OID;CM-MAC=X;CMTS-MAC=MAC=Z;CM-QOS=1.1;CM-VER=3.1;
No Responses!