Hello! Over the past few months I've been having a frustrating issue with my connection, trying to figure out what the problem is.
Using a Netgear Gateway CAX30, it affects both Ethernet and WiFi devices.
I have reset the modem multiple times, modified the configuration, rolled back the firmware, reset, re-setup, etc.
It was an issue that started to occur on Xfinitys gateway device, swapped to my own thinking that was the issue. It has still been occuring.
Tried a few RG6 cables, re positioned device, disconnected Ethernet cables and still occurs on just WiFi.
Below are the unique events from my event log, each having many duplicates.
Event Log
| Time |
Priority |
Description |
| 7/24/2024 10:42 |
Notice (6) |
CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1; |
| 7/24/2024 11:21 |
Notice (6) |
CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1; |
| 7/24/2024 10:56 |
Warning (5) |
Dynamic Range Window violation |
| 7/24/2024 14:30 |
Critical (3) |
No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"]:13;CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1; |
| 7/24/2024 14:30 |
Critical (3) |
Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1; |
| 7/24/2024 10:56 |
Warning (5) |
RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1; |
| 7/24/2024 13:38 |
Warning (5) |
RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1; |
| 7/24/2024 13:42 |
Critical (3) |
Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1; |
Cable Connection:
| Startup Procedure |
| Procedure |
Status |
Comment |
| Acquire Downstream Channel |
675000000 Hz |
Locked |
| Connectivity State |
OK |
Operational |
| Boot State |
OK |
Operational |
| Security |
Enabled |
BPI+ |
| IP Provisioning Mode |
Honor MDD |
IPv6 only
|
|
|
Downstream Bonded Channels
|
|
Channel
|
Lock Status
|
Modulation
|
Channel ID
|
Frequency
|
Power
|
SNR
|
Correctables
|
Uncorrectabables
|
|
1
|
Locked
|
256 QAM
|
41
|
675000000 Hz
|
6.4 dBmV
|
40.2 dB
|
11001
|
17048
|
|
2
|
Locked
|
256 QAM
|
13
|
507000000 Hz
|
5.5 dBmV
|
40.8 dB
|
8730
|
9904
|
|
3
|
Locked
|
256 QAM
|
14
|
513000000 Hz
|
5.4 dBmV
|
41.7 dB
|
11301
|
13910
|
|
4
|
Locked
|
256 QAM
|
15
|
519000000 Hz
|
4.8 dBmV
|
41.4 dB
|
9344
|
6808
|
|
5
|
Locked
|
256 QAM
|
16
|
525000000 Hz
|
5.2 dBmV
|
41.6 dB
|
7354
|
6665
|
|
6
|
Locked
|
256 QAM
|
17
|
531000000 Hz
|
5.2 dBmV
|
41.4 dB
|
9949
|
8858
|
|
7
|
Locked
|
256 QAM
|
18
|
537000000 Hz
|
5.1 dBmV
|
41.1 dB
|
8226
|
4148
|
|
8
|
Locked
|
256 QAM
|
19
|
543000000 Hz
|
5.0 dBmV
|
41.2 dB
|
7946
|
6820
|
|
9
|
Locked
|
256 QAM
|
20
|
549000000 Hz
|
4.8 dBmV
|
41.2 dB
|
10195
|
7415
|
|
10
|
Locked
|
256 QAM
|
21
|
555000000 Hz
|
5.0 dBmV
|
41.3 dB
|
8328
|
3750
|
|
11
|
Locked
|
256 QAM
|
22
|
561000000 Hz
|
5.4 dBmV
|
41.3 dB
|
9082
|
6717
|
|
12
|
Locked
|
256 QAM
|
23
|
567000000 Hz
|
5.0 dBmV
|
41.2 dB
|
10771
|
5658
|
|
13
|
Locked
|
256 QAM
|
24
|
573000000 Hz
|
5.1 dBmV
|
41.2 dB
|
8399
|
4619
|
|
14
|
Locked
|
256 QAM
|
25
|
579000000 Hz
|
5.2 dBmV
|
41.3 dB
|
10947
|
8938
|
|
15
|
Locked
|
256 QAM
|
26
|
585000000 Hz
|
5.4 dBmV
|
41.3 dB
|
10335
|
6188
|
|
16
|
Locked
|
256 QAM
|
27
|
591000000 Hz
|
5.4 dBmV
|
41.3 dB
|
9354
|
6917
|
|
17
|
Locked
|
256 QAM
|
28
|
597000000 Hz
|
5.5 dBmV
|
41.3 dB
|
11921
|
10689
|
|
18
|
Locked
|
256 QAM
|
29
|
603000000 Hz
|
5.4 dBmV
|
41.1 dB
|
10186
|
7138
|
|
19
|
Locked
|
256 QAM
|
30
|
609000000 Hz
|
5.6 dBmV
|
41.2 dB
|
10433
|
10709
|
|
20
|
Locked
|
256 QAM
|
31
|
615000000 Hz
|
5.5 dBmV
|
41.1 dB
|
13296
|
13115
|
|
21
|
Locked
|
256 QAM
|
32
|
621000000 Hz
|
5.6 dBmV
|
40.9 dB
|
10635
|
9809
|
|
22
|
Locked
|
256 QAM
|
33
|
627000000 Hz
|
5.7 dBmV
|
39.8 dB
|
12588
|
15182
|
|
23
|
Locked
|
256 QAM
|
34
|
633000000 Hz
|
5.6 dBmV
|
39.1 dB
|
13540
|
14246
|
|
24
|
Locked
|
256 QAM
|
35
|
639000000 Hz
|
5.8 dBmV
|
39.2 dB
|
11313
|
12673
|
|
25
|
Locked
|
256 QAM
|
36
|
645000000 Hz
|
5.9 dBmV
|
40.6 dB
|
14107
|
19212
|
|
26
|
Locked
|
256 QAM
|
37
|
651000000 Hz
|
5.8 dBmV
|
40.6 dB
|
12441
|
15361
|
|
27
|
Locked
|
256 QAM
|
38
|
657000000 Hz
|
6.0 dBmV
|
40.7 dB
|
10966
|
16195
|
|
28
|
Locked
|
256 QAM
|
39
|
663000000 Hz
|
6.2 dBmV
|
40.7 dB
|
13475
|
20367
|
|
29
|
Locked
|
256 QAM
|
40
|
669000000 Hz
|
6.2 dBmV
|
40.8 dB
|
10546
|
14641
|
|
30
|
Locked
|
256 QAM
|
42
|
681000000 Hz
|
6.4 dBmV
|
40.8 dB
|
11758
|
18991
|
|
31
|
Locked
|
256 QAM
|
43
|
687000000 Hz
|
6.5 dBmV
|
40.8 dB
|
8333
|
13589
|
|
32
|
Locked
|
256 QAM
|
44
|
693000000 Hz
|
6.9 dBmV
|
40.9 dB
|
9720
|
17400
|
|
|
|
|
Upstream Bonded Channels (Partial Service)
|
|
|
Channel
|
Lock Status
|
US Channel Type
|
Channel ID
|
Symbol Rate
|
Frequency
|
Power
|
|
1
|
Not Locked
|
Unknown
|
0
|
0 Ksym/sec
|
0 Hz
|
0 dBmV
|
|
2
|
Locked
|
ATDMA
|
2
|
5120 Ksym/sec
|
16400000 Hz
|
57.8 dBmV
|
|
3
|
Locked
|
ATDMA
|
3
|
5120 Ksym/sec
|
22800000 Hz
|
57.8 dBmV
|
|
4
|
Locked
|
ATDMA
|
4
|
5120 Ksym/sec
|
29200000 Hz
|
55.8 dBmV
|
|
5
|
Locked
|
ATDMA
|
5
|
5120 Ksym/sec
|
35600000 Hz
|
54.8 dBmV
|
|
6
|
Locked
|
ATDMA
|
6
|
5120 Ksym/sec
|
40400000 Hz
|
54.8 dBmV
|
|
7
|
Not Locked
|
Unknown
|
0
|
0 Ksym/sec
|
0 Hz
|
0 dBmV
|
|
8
|
Not Locked
|
Unknown
|
0
|
0 Ksym/sec
|
0 Hz
|
0 dBmV
|
|
|
|
|
|
Downstream OFDM Channels
|
|
|
Channel
|
Channel ID
|
Frequency
|
Power
|
SNR/MER
|
Active Subcarrier Number Range
|
Total Codewords
|
Uncorrectable Codewords
|
|
1
|
159
|
722000000 Hz
|
8.4 dBmV
|
41.3 dB
|
1186 ~ 2909
|
184933316
|
0
|
|
2
|
0
|
0 Hz
|
0 dBmV
|
0 dB
|
0 ~ 0
|
0
|
0
|
|
|
|
|
|
Upstream OFDMA Channels
|
|
|
Channel
|
UpstreamIsMuted
|
Ranging Status
|
Subcarrier Zero Frequency
|
Active Subcarrier Number Range
|
Symbols Per Frame
|
Tx Power
|
|
1
|
|
Other
|
0 MHz
|
0 ~ 0
|
0
|
0 dBmV
|
|
2
|
|
Other
|
0 MHz
|
0 ~ 0
|
0
|
0 dBmV
|
|
|
|
|
|
Extended Upstream Transmit Power
|
|
|
|
|
Current System Time: 2024-07-24 15:55:00
System Up Time: 14:50:45
|
EG
Expert
•
107.1K Messages
4 months ago
The upstream power is too high /out of spec ! 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/re-configured. 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, etc.
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 !
(edited)
0
XfinityBrianH
Official Employee
•
947 Messages
4 months ago
0
0
EG
Expert
•
107.1K Messages
4 months ago
@drewrc
Have you had a chance to see if any of those tips apply ? Please reply right here on these open public help forums. Thank you.
@XfinityBrianH How is going private at this point going to accomplish anything ??? The problem has already been clearly determined.....
(edited)
1
EG
Expert
•
107.1K Messages
4 months ago
TY ! It's my pleasure ! FWIW, reprovisioning a modem can't fix a physical connection signal impairment. For curiosity, would you please post what the signal values look like now ?
0
0