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Forum Discussion
intermittent internet loss since installing the CM1200 for the past few months
hi all I had to upgrade my cable modem to this one supported by Comcast for faster speed (350 MBPS), but it has been quite frustrating as it keeps dropping the connection intermittently (XBOX gam...
Be sure your using a good quality LAN cable between the modem and router. CAT6 is recommended.
What is the brand and model of the host wifi router connected to the modem?
eddiewfong wrote:
hi all
I had to upgrade my cable modem to this one supported by Comcast for faster speed (350 MBPS), but it has been quite frustrating as it keeps dropping the connection intermittently (XBOX games would lose network randomly, Ring alarm would report internet disconnected, reconnected a minute later, then drop again).
When I still had support for the device, the only recommendation was to reboot the modem. Now a few weeks later, I have lost official support. However, I now see these events in the event log which I didn't before
UCD invalid or channel unusable;CM-MAC=54:07:7d:a7:a9:e8;CMTS-MAC=00:90:f0:12:08:00;CM-QOS=1.1;CM-VER=3.1;
MDD message timeout;CM-MAC=54:07:7d:a7:a9:e8;CMTS-MAC=00:90:f0:12:08:00;CM-QOS=1.1;CM-VER=3
They sometimes happen once a day, sometimes several times a day, then it will be ok for a couple of days and then reappear
Please help.
hi
Thanks, yes, I am using all Cat6 cabling throughout the house.
The WIFI router is the Orbi AC3000 (RBR50V2)
What Firmware version is currently loaded?
Please post a copy and paste of the modems connection status and event log page.
https://kb.netgear.com/30007/How-do-I-obtain-the-cable-connection-information-from-a-NETGEAR-cable-modem-modem-router
https://kb.netgear.com/30008/How-do-I-view-or-clear-the-event-logs-on-my-NETGEAR-cable-modem-or-modem-routerFrequency 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 579000000 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 28 579000000 Hz -4.9 dBmV 42.3 dB 31 2 2 Locked QAM256 1 417000000 Hz -4 dBmV 42.8 dB 34 0 3 Locked QAM256 2 423000000 Hz -4.1 dBmV 42.7 dB 37 7 4 Locked QAM256 3 429000000 Hz -4 dBmV 42.8 dB 31 12 5 Locked QAM256 4 435000000 Hz -3.6 dBmV 42.9 dB 35 3 6 Locked QAM256 5 441000000 Hz -3.6 dBmV 43 dB 10 0 7 Locked QAM256 6 447000000 Hz -3.7 dBmV 42.9 dB 25 0 8 Locked QAM256 7 453000000 Hz -3.9 dBmV 42.9 dB 55 0 9 Locked QAM256 8 459000000 Hz -4 dBmV 42.8 dB 49 2 10 Locked QAM256 9 465000000 Hz -4 dBmV 42.9 dB 72 1 11 Locked QAM256 10 471000000 Hz -3.9 dBmV 42.4 dB 44 13 12 Locked QAM256 11 477000000 Hz -3.8 dBmV 42.9 dB 44 0 13 Locked QAM256 12 483000000 Hz -3.9 dBmV 42.9 dB 27 1 14 Locked QAM256 13 489000000 Hz -3.9 dBmV 42.9 dB 36 4 15 Locked QAM256 14 495000000 Hz -4 dBmV 42.8 dB 34 0 16 Locked QAM256 15 501000000 Hz -4 dBmV 42.8 dB 36 4 17 Locked QAM256 16 507000000 Hz -4.1 dBmV 42.7 dB 23 0 18 Locked QAM256 17 513000000 Hz -4.1 dBmV 42.8 dB 45 21 19 Locked QAM256 18 519000000 Hz -4.1 dBmV 42.8 dB 49 0 20 Locked QAM256 19 525000000 Hz -4 dBmV 42.7 dB 35 0 21 Locked QAM256 20 531000000 Hz -4.1 dBmV 42.7 dB 39 0 22 Locked QAM256 21 537000000 Hz -4.2 dBmV 42.6 dB 29 0 23 Locked QAM256 22 543000000 Hz -4.7 dBmV 42.3 dB 40 16 24 Locked QAM256 23 549000000 Hz -5 dBmV 42.2 dB 40 3 25 Locked QAM256 24 555000000 Hz -4.7 dBmV 42.3 dB 35 1 26 Locked QAM256 25 561000000 Hz -4.1 dBmV 42.6 dB 42 0 27 Locked QAM256 26 567000000 Hz -4 dBmV 42.7 dB 37 0 28 Locked QAM256 27 573000000 Hz -4.4 dBmV 42.4 dB 41 6 29 Locked QAM256 29 585000000 Hz -4.7 dBmV 42.3 dB 29 0 30 Locked QAM256 30 591000000 Hz -4.1 dBmV 42.6 dB 34 0 31 Locked QAM256 31 597000000 Hz -3.4 dBmV 43 dB 35 1 32 Locked QAM256 32 603000000 Hz -3.5 dBmV 42.9 dB 27 0 Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power 1 Locked ATDMA 17 5120 Ksym/sec 16400000 Hz 45.8 dBmV 2 Locked ATDMA 18 5120 Ksym/sec 22800000 Hz 47 dBmV 3 Locked ATDMA 19 5120 Ksym/sec 29200000 Hz 47.8 dBmV 4 Locked ATDMA 20 5120 Ksym/sec 35600000 Hz 47.3 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 Downstream OFDM Channels
Channel Lock
StatusModulation /
Profile IDChannel
IDFrequency Power SNR /
MERActive Subcarrier
Number RangeUnerrored
CodewordsCorrectable
CodewordsUncorrectable
Codewords1 Locked 0 ,1 ,2 ,3 193 957000000 Hz -11.4 dBmV 37.0 dB 148 ~ 3947 5306692625 4797941198 33 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 Extended Upstream Transmit PowerEnable Extended Upstream Transmit Power
Current System Time:Thu Aug 29 15:07:29 2024System Up Time:6 days 19:34:15