Contributor
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25 Messages
Repeated message in modem log
I'm using a NETGEAR Nighthawk CM3000 modem. For the past few weeks, It has been pulling dozens, if not hundreds, of "notice(6)" events every day - sometimes seconds apart:
US profile assignment change. US Chan ID: 41; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
<I obscured my MAC address>
My internet service seems good, even if the log has accumulated several thousand uncorrectable errors on every channel - any ideas?
| 5 | Locked | QAM256 | 16 | 519000000 Hz | 2.9 dBmV | 43.5 dB | 33843 | 42029 |
XfinityAdrienne
Official Employee
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1.4K Messages
3 days ago
Hey there, @bschmiduk! Thank you so much for taking the time to reach out to us here on the Xfinity Forums. I am happy to hear your connection seems good, that is a good sign. Typically, the notice 6 is a minor adjustment within the modem to the connection that we provide to your location.
Have you confirmed all connections are finger tight at the modem and the wall plate? Have you completed any troubleshooting steps?
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EG
Expert
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112.8K Messages
3 days ago
@bschmiduk @XfinityAdrienne
"Notice (6)" is actually a priority level indication of a particular modem event / error. It's just a notice, and it's not a critical event that would impact the service.
(edited)
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EG
Expert
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112.8K Messages
3 days ago
@bschmiduk
This may or may not be the root cause of the problem (YMMV) but it should be addressed regardless.
The upstream power is on the high side (especially on channels 1 and 4), and it may be intermittently fluctuating even higher to out of spec levels. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.
In an effort to try to obtain better connectivity / more wiggle room, check to see if there are any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/reconfigured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage from Home Depot, Target, Wal-Mart, etc. Splitters should be swapped with known to be good / new ones to test.
Also, check the coax cable for any damage such as cuts, nicks, abrasions, kinks, sharp bends, or animal chews.
If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two-way splitter connected directly off of the drop from the street / pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.
Good luck with it !
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EG
Expert
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112.8K Messages
2 days ago
Quite welcome ! And FWIW, they disabled the extended upstream power function on their end several years ago.
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