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chewy75
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Wednesday, December 11th, 2024

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Netgear CM600 connection issues

I've been having connection issues with modem on and off for about 6 months. It usually happens when my router, or modem loses power and starts back up. My router is a asus RT-AX86U Pro running asuswrt-merlin firmware and my modem is a Netgear CM600

I spoke to support desk for xfinity and they said my line is clean and shows a healthy signal. They suggested I try manufacture support and they said that the critical errors needed to be reviewed by xfinity. so here i am.

Any help would be appreciated.

Note: I've already tried power cycling router and modem, I have no splitters and have good cables.  I even tried factory resetting the modem. 


Thanks

Checking on the cm600 logs I noticed that I only have 1 Upstream bonded channel locked, but should have more.

Frequency start Value
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
 
Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 459000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Security Enable BPI+
IP Provisioning Mode Honor MDD IPv6 only
 
<tabindex=-1>Downstream Bonded Channels</tabindex=-1>
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 5 459000000 Hz -0.1 dBmV 42.4 dB 0 0
2 Locked QAM256 22 561000000 Hz 0.3 dBmV 41.8 dB 0 0
3 Locked QAM256 23 567000000 Hz 0.3 dBmV 42.1 dB 0 0
4 Locked QAM256 24 573000000 Hz 0.6 dBmV 42.2 dB 1 0
5 Locked QAM256 1 435000000 Hz 0.4 dBmV 42.4 dB 0 0
6 Locked QAM256 2 441000000 Hz -0.2 dBmV 42.0 dB 0 0
7 Locked QAM256 3 447000000 Hz -0.7 dBmV 41.8 dB 0 0
8 Locked QAM256 4 453000000 Hz 0.6 dBmV 42.9 dB 0 0
9 Locked QAM256 6 465000000 Hz 0.4 dBmV 42.7 dB 0 0
10 Locked QAM256 7 471000000 Hz 0.6 dBmV 42.8 dB 0 0
11 Locked QAM256 8 477000000 Hz -0.4 dBmV 42.0 dB 0 0
12 Locked QAM256 9 483000000 Hz 0.6 dBmV 42.6 dB 0 0
13 Locked QAM256 10 489000000 Hz 0.1 dBmV 42.3 dB 0 0
14 Locked QAM256 11 495000000 Hz -0.1 dBmV 42.4 dB 0 0
15 Locked QAM256 12 501000000 Hz 0.7 dBmV 42.9 dB 0 0
16 Locked QAM256 13 507000000 Hz 0.3 dBmV 38.7 dB 0 0
17 Locked QAM256 14 513000000 Hz -0.4 dBmV 42.5 dB 0 0
18 Locked QAM256 15 519000000 Hz -0.5 dBmV 42.1 dB 0 0
19 Locked QAM256 16 525000000 Hz -1.0 dBmV 41.9 dB 0 0
20 Locked QAM256 17 531000000 Hz -0.4 dBmV 41.9 dB 0 0
21 Locked QAM256 18 537000000 Hz -0.5 dBmV 42.0 dB 0 0
22 Locked QAM256 19 543000000 Hz -0.5 dBmV 41.9 dB 0 0
23 Locked QAM256 20 549000000 Hz -0.1 dBmV 41.9 dB 0 0
24 Locked QAM256 21 555000000 Hz -0.2 dBmV 41.9 dB 1 0
 
<tabindex=-1>Upstream Bonded Channels</tabindex=-1>
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 3 5120 Ksym/sec 22800000 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
5 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
6 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
7 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
8 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV

event log

Time Priority Description
2024-12-11, 12:49:18 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.1;CM-VER=3.0;
2024-12-11, 12:48:29 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.0;CM-VER=3.0;
2024-12-11, 12:48:23 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.1;CM-VER=3.0;
2024-12-11, 12:47:34 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=xxx;CMTS-MAC=xxxCM-QOS=1.0;CM-VER=3.0;
2024-12-11, 12:47:31 Critical (3) No UCDs Received - Timeout;;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.0;CM-VER=3.0;
2024-12-11, 12:47:11 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.1;CM-VER=3.0;
2024-12-11, 12:46:26 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=xxx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
2024-12-11, 12:46:22 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.0;CM-VER=3.0;
2024-12-11, 12:45:49 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.0;CM-VER=3.0;
2024-12-11, 12:45:27 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.0;CM-VER=3.0;
2024-12-11, 12:45:23 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=xxxCMTS-MAC=xxx;CM-QOS=1.0;CM-VER=3.0;
2024-12-11, 12:45:22 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.0;CM-VER=3.0;
2024-12-11, 12:45:11 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.0;CM-VER=3.0;
2024-12-11, 12:45:10 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.0;CM-VER=3.0;
2024-12-11, 12:45:07 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.0;CM-VER=3.0;
2024-12-11, 12:45:00 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.1;CM-VER=3.0;
2024-12-11, 12:44:57 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.1;CM-VER=3.0;
2024-12-11, 12:44:04 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.1;CM-VER=3.0;
2024-12-11, 12:43:17 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.0;CM-VER=3.0;
2024-12-11, 12:43:13 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.1;CM-VER=3.0;
2024-12-11, 12:42:22 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.1;CM-VER=3.0;
2024-12-11, 12:41:31 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=xxx;CMTS-MAC=xxxCM-QOS=1.1;CM-VER=3.0;
2024-12-11, 12:41:24 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=xxxCMTS-MAC=xxx;CM-QOS=1.1;CM-VER=3.0;
2024-12-11, 12:40:41 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.1;CM-VER=3.0;
2024-12-11, 12:39:50 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.1;CM-VER=3.0;
2024-12-11, 12:38:13 Critical (3) No UCDs Received - Timeout;;CM-MAC=xxx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
2024-12-11, 12:37:56 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.0;CM-VER=3.0;
2024-12-11, 12:37:51 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.1;CM-VER=3.0;
2024-12-11, 12:37:43 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=xxx:d0;CMTS-MAC=xxxCM-QOS=1.1;CM-VER=3.0;
2024-12-11, 12:37:31 Critical (3) REG RSP not received;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.1;CM-VER=3.0;
2024-12-11, 12:36:05 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.0;CM-VER=3.0;
2024-12-11, 12:36:00 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.1;CM-VER=3.0;
2024-12-11, 12:35:13 Critical (3) No UCDs Received - Timeout;;CM-MAC=xxx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
2024-12-11, 12:34:56 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.0;CM-VER=3.0;
2024-12-11, 12:34:51 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.1;CM-VER=3.0;
2024-12-11, 12:34:03 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.0;CM-VER=3.0;
2024-12-11, 12:33:57 Critical (3) Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=xxx;CMTS-MAC=xxx;CM-QOS=1.1;CM-VER=3.0;
2024-12-11, 12:33:40 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=xxx;CMTS-MAC=xxxCM-QOS=1.1;CM-VER=3.0;
2024-12-11, 12:33:08 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=xxx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Notice (6) Honoring MDD; IP provisioning mode = IPv6

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8 months ago

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