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Forum Discussion
CM1200 Modem Losing Downstream Connection Several times a day (for about 60 sec)
All lights on modem say solid green except for downstream which blinks while internet is lost (generally about 30-60 sec). My ISP has sent techs out multiple times, latest was just this morning, but I'm hoping to speed things along and troubleshoot anything else I can...
I have attempted to rule out potential issues:
-Bought a fresh 100ft coax cable and ran it directly from modem to ISP's line.
-New router as of yesterday, old one was only 2 years old (also Netgear).
ISP thinks this is an issue with the modem attempting firmware updates. Assuming the event log lends itself to this being an issue, how can I disable auto updates on the modem? Not seeing any option on login.
Snip of Event Log:
| Time | Priority | Description |
| Tue Feb 14 17:29:20 2023 | Notice (6) | CM-STATUS message sent. Event Type Code: 3; Chan ID: N/A; DSID: ; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=80:cc:9c:b2:3e:18;CMTS-MAC=70:1f:53:99:ec:ed;CM-QOS=1.1;CM-VER=3.1; |
| Tue Feb 14 17:29:19 2023 | Warning (5) | Unicast DSID PSN startup error |
| Tue Feb 14 17:29:13 2023 | 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=80:cc:9c:b2:3e:18;CMTS-MAC=70:1f:53:99:ec:ed;CM-QOS=1.1;CM-VER=3.1; |
| Tue Feb 14 17:28:58 2023 | Notice (6) | DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 3.;CM-MAC=80:cc:9c:b2:3e:18;CMTS-MAC=70:1f:53:99:ec:ed;CM-QOS=1.1;CM-VER=3.1; |
| Tue Feb 14 17:28:57 2023 | Notice (6) | TLV-11 - unrecognized OID;CM-MAC=80:cc:9c:b2:3e:18;CMTS-MAC=70:1f:53:99:ec:ed;CM-QOS=1.1;CM-VER=3.1; |
| Tue Feb 14 17:28:56 2023 | Warning (5) | DHCP WARNING - Non-critical field invalid in response ;CM-MAC=80:cc:9c:b2:3e:18;CMTS-MAC=70:1f:53:99:ec:ed;CM-QOS=1.1;CM-VER=3.1; |
| Tue Feb 14 17:28:54 2023 | Notice (6) | Honoring MDD; IP provisioning mode = IPv4 |
| Tue Feb 14 17:28:02 2023 | Notice (6) | CM-STATUS message sent. Event Type Code: 1; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=80:cc:9c:b2:3e:18;CMTS-MAC=70:1f:53:99:ec:ed;CM-QOS=1.1;CM-VER=3.1; |
| Tue Feb 14 17:28:01 2023 | Warning (5) | MDD message timeout;CM-MAC=80:cc:9c:b2:3e:18;CMTS-MAC=70:1f:53:99:ec:ed;CM-QOS=1.1;CM-VER=3.1; |
| Tue Feb 14 10:24:37 2023 | 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=80:cc:9c:b2:3e:18;CMTS-MAC=70:1f:53:99:ec:ed;CM-QOS=1.1;CM-VER=3.1; |
| Tue Feb 14 10:24:23 2023 | Notice (6) | DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 3.;CM-MAC=80:cc:9c:b2:3e:18;CMTS-MAC=70:1f:53:99:ec:ed;CM-QOS=1.1;CM-VER=3.1; |
| Tue Feb 14 10:24:22 2023 | Notice (6) | TLV-11 - unrecognized OID;CM-MAC=80:cc:9c:b2:3e:18;CMTS-MAC=70:1f:53:99:ec:ed;CM-QOS=1.1;CM-VER=3.1; |
| Tue Feb 14 10:24:22 2023 | Warning (5) | DHCP WARNING - Non-critical field invalid in response ;CM-MAC=80:cc:9c:b2:3e:18;CMTS-MAC=70:1f:53:99:ec:ed;CM-QOS=1.1;CM-VER=3.1; |
| Tue Feb 14 10:24:18 2023 | Notice (6) | Honoring MDD; IP provisioning mode = IPv4 |
| Tue Feb 14 10:23:28 2023 | Notice (6) | CM-STATUS message sent. Event Type Code: 1; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=80:cc:9c:b2:3e:18;CMTS-MAC=70:1f:53:99:ec:ed;CM-QOS=1.1;CM-VER=3.1; |
| Tue Feb 14 10:23:27 2023 | Warning (5) | MDD message timeout;CM-MAC=80:cc:9c:b2:3e:18;CMTS-MAC=70:1f:53:99:ec:ed;CM-QOS=1.1;CM-VER=3.1; |
4 Replies
As an end user of this modem, you do not have any control over the firmware update process. That is solely the responsibility of the ISP.
Have you tried the recessed reset button on the back?
To check the firmware version on your machine, compare here:
Carefully review the paragraphs at the top of the tables.
It has become a standard finger pointing process by the ISP toward end user owed hardware. The ISP wants you to rent/lease their hardware and contribute to their revenue stream.
It would be helpful if you posted a copy of your modem's cable connection page. In particular the downstream bonded channels, upstream bonded channels, and OFDM/OFDMA channels.
You can educate yourself on the modem power level requirements here:
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router
Hmm.. I've posted the event log 3x now and it seems to always get removed....
Please copy the data from the modems web page into a word doc then save the file off as a .PDF then use the Choose File button here for your next post to post the file here in the forums.
