Hi,
I recently switch out my old cable modem to a new S34 with my Xfinity service and every few days my internet stops working. Modem shows connection is still there (Blue light) but no traffic. It will stay this way until I reboot the S34 modem.
The log/status shows no obvious error, the log does show some critical issues now and then but does not seem to affect or correspond to the issues I’m having.
My old cable modem did not have this issue so I wondering if this is a faulty modem?
Status :
Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 501000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File OK
Security Enabled BPI+
DOCSIS Network Access Enabled Allowed
Downstream Bonded Channels
Channel ID Lock Status Modulation Frequency Power SNR/MER Corrected Uncorrectables
20 Locked 256QAM 501000000 Hz 2.4 dBmV 40.9 dB 0 0
4 Locked 256QAM 405000000 Hz 2.4 dBmV 40.4 dB 0 0
28 Locked 256QAM 549000000 Hz 1.7 dBmV 40.9 dB 1032 4348
1 Locked 256QAM 387000000 Hz 2.5 dBmV 40.9 dB 41164 112501
2 Locked 256QAM 393000000 Hz 2.3 dBmV 43.4 dB 43280 121262
3 Locked 256QAM 399000000 Hz 2.1 dBmV 40.4 dB 40688 115873
5 Locked 256QAM 411000000 Hz 2.2 dBmV 40.9 dB 34548 82992
6 Locked 256QAM 417000000 Hz 2.4 dBmV 40.9 dB 26325 57821
7 Locked 256QAM 423000000 Hz 2.3 dBmV 40.9 dB 28122 57780
8 Locked 256QAM 429000000 Hz 2.5 dBmV 40.9 dB 25181 55313
9 Locked 256QAM 435000000 Hz 2.5 dBmV 43.4 dB 19853 39511
10 Locked 256QAM 441000000 Hz 2.6 dBmV 40.4 dB 26385 49210
11 Locked 256QAM 447000000 Hz 2.4 dBmV 40.9 dB 18146 35627
13 Locked 256QAM 459000000 Hz 2.5 dBmV 40.9 dB 19181 51050
14 Locked 256QAM 465000000 Hz 2.8 dBmV 40.9 dB 23553 57550
15 Locked 256QAM 471000000 Hz 2.5 dBmV 40.9 dB 19971 56175
16 Locked 256QAM 477000000 Hz 2.6 dBmV 40.9 dB 16914 32938
17 Locked 256QAM 483000000 Hz 2.8 dBmV 40.9 dB 14348 22083
18 Locked 256QAM 489000000 Hz 2.4 dBmV 43.4 dB 14166 28095
19 Locked 256QAM 495000000 Hz 2.7 dBmV 40.9 dB 12023 22996
21 Locked 256QAM 507000000 Hz 2.6 dBmV 40.9 dB 11313 20800
22 Locked 256QAM 513000000 Hz 2.2 dBmV 40.4 dB 11854 23621
23 Locked 256QAM 519000000 Hz 2.2 dBmV 40.4 dB 11001 18538
24 Locked 256QAM 525000000 Hz 2.1 dBmV 40.9 dB 10119 21780
25 Locked 256QAM 531000000 Hz 1.9 dBmV 40.9 dB 16051 41122
26 Locked 256QAM 537000000 Hz 1.9 dBmV 40.9 dB 6890 15658
27 Locked 256QAM 543000000 Hz 1.3 dBmV 40.9 dB 21224 83064
29 Locked 256QAM 555000000 Hz 1.0 dBmV 40.9 dB 11716 28055
30 Locked 256QAM 561000000 Hz 1.2 dBmV 40.9 dB 7652 15535
31 Locked 256QAM 567000000 Hz 0.9 dBmV 40.9 dB 8697 19663
32 Locked 256QAM 573000000 Hz 1.2 dBmV 40.4 dB 8165 15512
193 Locked OFDM PLC 722000000 Hz -1.5 dBmV 42.0 dB 3158955277 199586
194 Locked OFDM PLC 957000000 Hz -9.0 dBmV 38.0 dB 3900150312 364376
Upstream Bonded Channels
Channel ID Lock Status US Channel Type Frequency Width Power
20 Locked SC-QAM 35600000 Hz 6400000 43.3 dBmV
17 Locked SC-QAM 16400000 Hz 6400000 41.3 dBmV
19 Locked SC-QAM 29200000 Hz 6400000 43.0 dBmV
18 Locked SC-QAM 22800000 Hz 6400000 42.5 dBmV
Current System Time:06/22/2025 11:06:45
Log :
Date Time Event Level Description
06/22/2025 11:03:33 Critical Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=(Edited Private Information) ;CMTS-MAC=00:90:f0:24:00:00;CM-QOS=1.1;CM-VER=3.1;
06/22/2025 11:03:13 Notice Successful LAN WebGUI login from 192.168.100.200 on 06/22/25 at 11:03 AM
06/22/2025 11:03:11 Notice Failed LAN WebGUI login attempt from 192.168.100.200 on 06/22/25 at 11:03 AM
06/22/2025 11:02:33 Critical Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=(Edited Private Information) ;CMTS-MAC=00:90:f0:24:00:00;CM-QOS=1.1;CM-VER=3.1;
06/22/2025 10:13:44 Notice CM-STATUS message sent. Event Type Code: 6; Chan ID: 43; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=(Edited Private Information) ;CMTS-MAC=00:90:f0:24:00:00;CM-QOS=1.1;CM-VER=3.1;
06/22/2025 10:13:33 Critical Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=(Edited Private Information) ;CMTS-MAC=00:90:f0:24:00:00;CM-QOS=1.1;CM-VER=3.1;
06/22/2025 10:12:33 Critical Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=(Edited Private Information) ;CMTS-MAC=00:90:f0:24:00:00;CM-QOS=1.1;CM-VER=3.1;
06/22/2025 10:12:07 Critical Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=(Edited Private Information) ;CMTS-MAC=00:90:f0:24:00:00;CM-QOS=1.1;CM-VER=3.1;
06/22/2025 07:22:12 Notice CM-STATUS message sent. Event Type Code: 6; Chan ID: 43; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=(Edited Private Information) ;CMTS-MAC=00:90:f0:24:00:00;CM-QOS=1.1;CM-VER=3.1;
06/22/2025 07:22:07 Critical Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=(Edited Private Information) ;CMTS-MAC=00:90:f0:24:00:00;CM-QOS=1.1;CM-VER=3.1;
06/22/2025 07:22:01 Error DBC-ACK not received;CM-MAC=(Edited Private Information) ;CMTS-MAC=00:90:f0:24:00:00;CM-QOS=1.1;CM-VER=3.1;
06/22/2025 07:21:59 Warning TCS Partial Service;CM-MAC=(Edited Private Information) ;CMTS-MAC=00:90:f0:24:00:00;CM-QOS=1.1;CM-VER=3.1;
06/22/2025 07:21:59 Warning Initializing Channel Timeout Expires - Time the CM can perform initial ranging on all upstream channels in the TCS has expired;CM-MAC=(Edited Private Information) ;CMTS-MAC=00:90:f0:24:00:00;CM-QOS=1.1;CM-VER=3.1;
06/22/2025 07:21:31 Warning RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=(Edited Private Information) ;CMTS-MAC=00:90:f0:24:00:00;CM-QOS=1.1;CM-VER=3.1;
06/22/2025 07:21:07 Critical No Ranging Response received - T3 time-out;CM-MAC=(Edited Private Information) ;CMTS-MAC=00:90:f0:24:00:00;CM-QOS=1.1;CM-VER=3.1;
06/22/2025 07:17:50 Notice US profile assignment change. US Chan ID: 43; Previous Profile: 10; New Profile: 12.;CM-MAC=(Edited Private Information) ;CMTS-MAC=00:90:f0:24:00:00;CM-QOS=1.1;CM-VER=3.1;
06/22/2025 07:13:24 Notice CM-STATUS message sent. Event Type Code: 23; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=(Edited Private Information) ;CMTS-MAC=00:90:f0:24:00:00;CM-QOS=1.1;CM-VER=3.1;
06/22/2025 07:11:48 Warning RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=(Edited Private Information) ;CMTS-MAC=00:90:f0:24:00:00;CM-QOS=1.1;CM-VER=3.1;
06/22/2025 07:11:35 Notice US profile assignment change. US Chan ID: 43; Previous Profile: 11; New Profile: 10.;CM-MAC=(Edited Private Information) ;CMTS-MAC=00:90:f0:24:00:00;CM-QOS=1.1;CM-VER=3.1;
06/22/2025 07:11:27 Notice CM-STATUS message sent. Event Type Code: 5; Chan ID: 22; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=(Edited Private Information) ;CMTS-MAC=00:90:f0:24:00:00;CM-QOS=1.1;CM-VER=3.1;
06/22/2025 07:11:08 Warning RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=(Edited Private Information) ;CMTS-MAC=00:90:f0:24:00:00;CM-QOS=1.1;CM-VER=3.1;
06/22/2025 07:11:05 Notice CM-STATUS message sent. Event Type Code: 4; Chan ID: 19; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=(Edited Private Information) ;CMTS-MAC=00:90:f0:24:00:00;CM-QOS=1.1;CM-VER=3.1;
06/22/2025 07:10:59 Critical SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=(Edited Private Information) ;CMTS-MAC=00:90:f0:24:00:00;CM-QOS=1.1;CM-VER=3.1;
06/22/2025 07:10:57 Critical No Ranging Response received - T3 time-out;CM-MAC=(Edited Private Information) ;CMTS-MAC=00:90:f0:24:00:00;CM-QOS=1.1;CM-VER=3.1;
06/22/2025 07:10:57 Notice CM-STATUS message sent. Event Type Code: 16; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2.;CM-MAC=(Edited Private Information) ;CMTS-MAC=00:90:f0:24:00:00;CM-QOS=1.1;CM-VER=3.1;
06/22/2025 07:10:57 Critical No Ranging Response received - T3 time-out;CM-MAC=(Edited Private Information) ;CMTS-MAC=00:90:f0:24:00:00;CM-QOS=1.1;CM-VER=3.1;
06/22/2025 07:10:55 Notice CM-STATUS message sent. Event Type Code: 16; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2.;CM-MAC=(Edited Private Information) ;CMTS-MAC=00:90:f0:24:00:00;CM-QOS=1.1;CM-VER=3.1;
06/22/2025 07:10:55 Critical SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=(Edited Private Information) ;CMTS-MAC=00:90:f0:24:00:00;CM-QOS=1.1;CM-VER=3.1;
06/22/2025 07:10:35 Notice US profile assignment change. US Chan ID: 43; Previous Profile: 12; New Profile: 11.;CM-MAC=(Edited Private Information) ;CMTS-MAC=00:90:f0:24:00:00;CM-QOS=1.1;CM-VER=3.1;
06/22/2025 07:08:24 Notice US profile assignment change. US Chan ID: 43; Previous Profile: ; New Profile: 12.;CM-MAC=(Edited Private Information) ;CMTS-MAC=00:90:f0:24:00:00;CM-QOS=1.1;CM-VER=3.1;
