Hello,
I purchased and and activated my new CM2000 netgear modem for Xfinity Gig service.
I did notice that the downstream light started flashing. No connectivity lost, and everything seems to work as intended. However, when I look at the logs, I see the following:
| Time |
Priority |
Description |
| Tue Mar 30 09:17:03 2021 |
(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=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1; |
| Tue Mar 30 09:16:28 2021 |
(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=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1; |
| Tue Mar 30 09:07:53 2021 |
(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=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1; |
| Tue Mar 30 09:07:25 2021 |
(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=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1; |
This is my channels info as well:
| Downstream Bonded Channels |
| Channel |
Lock Status |
Modulation |
Channel ID |
Frequency |
Power |
SNR |
Correctables |
Uncorrectables |
| 1 |
Locked |
QAM256 |
5 |
507000000 Hz |
-2.4 dBmV |
40.5 dB |
0 |
0 |
| 2 |
Locked |
QAM256 |
2 |
489000000 Hz |
-1.9 dBmV |
40.7 dB |
0 |
0 |
| 3 |
Locked |
QAM256 |
3 |
495000000 Hz |
-1.9 dBmV |
40.7 dB |
0 |
0 |
| 4 |
Locked |
QAM256 |
4 |
501000000 Hz |
-2.0 dBmV |
40.7 dB |
0 |
0 |
| 5 |
Locked |
QAM256 |
6 |
513000000 Hz |
-2.6 dBmV |
40.5 dB |
0 |
0 |
| 6 |
Locked |
QAM256 |
7 |
519000000 Hz |
-2.8 dBmV |
40.4 dB |
0 |
0 |
| 7 |
Locked |
QAM256 |
8 |
525000000 Hz |
-2.8 dBmV |
40.4 dB |
0 |
0 |
| 8 |
Locked |
QAM256 |
9 |
531000000 Hz |
-2.8 dBmV |
40.5 dB |
0 |
0 |
| 9 |
Locked |
QAM256 |
10 |
537000000 Hz |
-2.9 dBmV |
40.4 dB |
0 |
0 |
| 10 |
Locked |
QAM256 |
11 |
543000000 Hz |
-3.0 dBmV |
40.3 dB |
0 |
0 |
| 11 |
Locked |
QAM256 |
12 |
549000000 Hz |
-3.2 dBmV |
40.2 dB |
0 |
0 |
| 12 |
Locked |
QAM256 |
13 |
555000000 Hz |
-3.2 dBmV |
40.3 dB |
0 |
0 |
| 13 |
Locked |
QAM256 |
14 |
561000000 Hz |
-3.2 dBmV |
40.2 dB |
0 |
0 |
| 14 |
Locked |
QAM256 |
15 |
567000000 Hz |
-3.3 dBmV |
40.0 dB |
0 |
0 |
| 15 |
Locked |
QAM256 |
16 |
573000000 Hz |
-3.3 dBmV |
40.0 dB |
0 |
0 |
| 16 |
Locked |
QAM256 |
17 |
579000000 Hz |
-3.5 dBmV |
40.0 dB |
0 |
0 |
| 17 |
Locked |
QAM256 |
18 |
585000000 Hz |
-3.8 dBmV |
39.9 dB |
0 |
0 |
| 18 |
Locked |
QAM256 |
19 |
591000000 Hz |
-3.9 dBmV |
39.8 dB |
0 |
0 |
| 19 |
Locked |
QAM256 |
20 |
597000000 Hz |
-3.7 dBmV |
39.9 dB |
0 |
0 |
| 20 |
Locked |
QAM256 |
21 |
603000000 Hz |
-3.7 dBmV |
39.9 dB |
0 |
0 |
| 21 |
Locked |
QAM256 |
22 |
609000000 Hz |
-3.7 dBmV |
40.0 dB |
0 |
0 |
| 22 |
Locked |
QAM256 |
23 |
615000000 Hz |
-3.7 dBmV |
39.9 dB |
0 |
0 |
| 23 |
Locked |
QAM256 |
24 |
621000000 Hz |
-3.3 dBmV |
40.1 dB |
0 |
0 |
| 24 |
Locked |
QAM256 |
25 |
627000000 Hz |
-3.0 dBmV |
40.3 dB |
0 |
0 |
| 25 |
Locked |
QAM256 |
26 |
633000000 Hz |
-2.7 dBmV |
40.3 dB |
0 |
0 |
| 26 |
Locked |
QAM256 |
27 |
639000000 Hz |
-2.7 dBmV |
40.1 dB |
0 |
0 |
| 27 |
Locked |
QAM256 |
28 |
645000000 Hz |
-2.6 dBmV |
40.2 dB |
0 |
0 |
| 28 |
Locked |
QAM256 |
29 |
651000000 Hz |
-2.7 dBmV |
40.2 dB |
0 |
0 |
| 29 |
Locked |
QAM256 |
30 |
657000000 Hz |
-2.7 dBmV |
40.2 dB |
0 |
0 |
| 30 |
Locked |
QAM256 |
31 |
663000000 Hz |
-2.8 dBmV |
40.1 dB |
0 |
0 |
| 31 |
Locked |
QAM256 |
32 |
669000000 Hz |
-2.8 dBmV |
40.1 dB |
0 |
0 |
| 32 |
Not Locked |
Unknown |
0 |
0 Hz |
0.0 dBmV |
0.0 dB |
0 |
0 |
|
|
|
| Upstream Bonded Channels |
| Channel |
Lock Status |
US Channel Type |
Channel ID |
Symbol Rate |
Frequency |
Power |
| 1 |
Locked |
ATDMA |
1 |
5120 |
35600000 Hz |
47.8 dBmV |
| 2 |
Locked |
ATDMA |
2 |
5120 |
29200000 Hz |
46.8 dBmV |
| 3 |
Locked |
ATDMA |
3 |
5120 |
22800000 Hz |
46.8 dBmV |
| 4 |
Locked |
ATDMA |
4 |
5120 |
16400000 Hz |
45.5 dBmV |
| 5 |
Locked |
ATDMA |
5 |
2560 |
40400000 Hz |
47.3 dBmV |
| 6 |
Not Locked |
Unknown |
0 |
0 |
0 Hz |
0.0 dBmV |
| 7 |
Not Locked |
Unknown |
0 |
0 |
0 Hz |
0.0 dBmV |
| 8 |
Not Locked |
Unknown |
0 |
0 |
0 Hz |
0.0 dBmV |
|
|
|
| Downstream OFDM Channels |
| Channel |
Lock
Status |
Modulation /
Profile ID |
Channel
ID |
Frequency |
Power |
SNR /
MER |
Active Subcarrier
Number Range |
Unerrored
Codewords |
Correctable
Codewords |
Uncorrectable
Codewords |
| 1 |
Locked |
0 ,1 ,2 ,3 |
37 |
690000000 Hz |
-2.3 dBmV |
39.8 dB |
1228 ~ 2867 |
324508110 |
323693266 |
2 |
| 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 |
|
Any advise would be appreciated on what is causing this behavior (flashing downstream light and error codes in log).
EG
Expert
•
110.2K Messages
4 years ago
Have you tried power-cycling it ?
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0
puch96
Frequent Visitor
•
10 Messages
4 years ago
Yes. I tried power cycling it, and it goes back to normal, but after a while (random time), the downstream light starts blinking again and same error messages appear again.
It does look like all channels are properly locked and within acceptable levels....
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0
EG
Expert
•
110.2K Messages
4 years ago
Perhaps it's a firmware glitch ? The signal stats are good. Some error log entries are to be expected. As long as they are not numerous over a short period of time. Bottom line. I wouldn't sweat the light if you are not having any actual issues.
(edited)
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puch96
Frequent Visitor
•
10 Messages
4 years ago
it could be. This is similar behavior I was having with my previous modem (Arris SB8200), in which the downstream light will change from Blue to Green (as I posted on another forum), so I am wondering if there are any issues going on from Comcast's side....
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0
puch96
Frequent Visitor
•
10 Messages
4 years ago
Anyone here from Xfinity that could shed some light? Maybe service tech needs to check my lines / signal levels???
0
0
EG
Expert
•
110.2K Messages
4 years ago
You wrote this: " No connectivity lost, and everything seems to work as intended."
So if there are no real problems, why are you sweating this ?
0
0
puch96
Frequent Visitor
•
10 Messages
4 years ago
I was just trying to understand the technical reason of why these error codes showed up and why my downstream light flashes white... That's all.
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0
EG
Expert
•
110.2K Messages
4 years ago
O/k well I doubt that you'll get any authoritative "technical" explanations here as there aren't any actual CC employed official RF / DOCSIS / network engineers that post here.
(edited)
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