Hi All,
I'm troubleshooting what seems to be intermittent drops throughout the day on XFinity cable... and the culprit is either the CM1000 going bad, or some kind of line quality/hardware issues on the XFinity side. Before you ask, no there aren't any splitters between the modem and the XFinity cable box. I have worked with XFinity support, who is reporting that all is fine on their end, and is pointing the finger at the modem. They ran line quality tests, and I'm getting excellent speedtests when things are working. Here's the order of events when I catch it happening:
1.) Internet service is lost
2.) The green "internet" icon light on the CM1000 starts flashing, and will eventually reconnect and go solid. (2nd light from the bottom, above the network icon)
3.) Internet service returns
4.) Total time occurred during outage is usually a minute or 2, while minimal, is disruptive enough to anger those in the household as it interrupts streaming, browsing, you name it.
I have pulled some logs from the CM1000 to get some feedback on what these might indicate? Is it truly an XFinity issue, or is this just normal with the modem going bad?
Here are some events from 5/11:
2020-05-11, 12:01:46 Notice (6) CM-STATUS message sent. Event Type Code: 24; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1.;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-11, 12:00:51 Notice (6) CM-STATUS message sent. Event Type Code: 16; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1 2 3.;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-11, 12:00:30 Notice (6) CM-STATUS message sent. Event Type Code: 16; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2 3.;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-11, 12:00:16 Notice (6) DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
Time Not Established Notice (6) Honoring MDD; IP provisioning mode = IPv6
Time Not Established Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2020-05-11, 11:54:16 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-11, 11:43:53 Critical (3) SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-11, 11:43:50 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-11, 11:43:38 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2020-05-11, 11:43:36 Critical (3) SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-11, 11:43:34 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-11, 11:43:07 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2020-05-11, 11:42:50 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-11, 11:42:49 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
Here are some events from 5/14:
2020-05-14, 10:42:54 Notice (6) DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:42:46 Notice (6) Honoring MDD; IP provisioning mode = IPv6
2020-05-14, 10:41:35 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:41:29 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:41:28 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:41:12 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:41:11 Warning (5) MDD message timeout;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:40:47 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:40:47 Warning (5) MDD message timeout;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:40:35 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:40:34 Warning (5) MDD message timeout;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:40:22 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:40:22 Warning (5) MDD message timeout;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:40:11 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:40:10 Warning (5) MDD message timeout;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:39:52 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:39:51 Warning (5) MDD message timeout;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:39:03 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:39:02 Warning (5) MDD message timeout;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:38:39 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:38:38 Warning (5) MDD message timeout;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:38:32 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:38:32 Warning (5) MDD message timeout;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:38:30 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:38:25 Notice (6) CM-STATUS message sent. Event Type Code: 21; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:38:24 Notice (6) CM-STATUS message sent. Event Type Code: 20; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:38:24 Notice (6) CM-STATUS message sent. Event Type Code: 16; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:37:05 Notice (6) CM-STATUS message sent. Event Type Code: 4; Chan ID: 5 11 12 13 14 15 16 17 18 19 20 21 22 23 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:37:05 Notice (6) CM-STATUS message sent. Event Type Code: 24; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0.;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:37:04 Notice (6) CM-STATUS message sent. Event Type Code: 16; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1 2 3.;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:37:02 Notice (6) CM-STATUS message sent. Event Type Code: 16; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2 3.;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:37:01 Notice (6) CM-STATUS message sent. Event Type Code: 16; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:37:01 Notice (6) CM-STATUS message sent. Event Type Code: 22; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:36:58 Warning (5) MDD message timeout;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:36:57 Notice (6) CM-STATUS message sent. Event Type Code: 16; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:36:45 Notice (6) CM-STATUS message sent. Event Type Code: 16; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1 2 3.;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:36:35 Notice (6) CM-STATUS message sent. Event Type Code: 4; Chan ID: 5 11 12 13 14 15 16 17 18 19 20 21 22 23 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:36:20 Notice (6) CM-STATUS message sent. Event Type Code: 24; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1.;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:36:20 Notice (6) CM-STATUS message sent. Event Type Code: 16; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2 3.;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
2020-05-14, 10:36:15 Notice (6) CM-STATUS message sent. Event Type Code: 16; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=a0:04:60:fc:37:50;CMTS-MAC=00:01:5c:a2:6a:51;CM-QOS=1.1;CM-VER=3.1;
Thank you very much for your support, ideas and feedback!
