Hello, we recently moved into a new home, brought our owned equipment with us. Never had any issues in the old house and now are plagued with internet drops. I work from home so this has become an issue. I have a netgear CM700 modem with a Nighthawk AC1900 Router. We had zero issues in our old home and fear the cable line may be the culprit. I've attached my model readings, i am pretty savvy at these things, but have no idea how to read this! Appreciate any help in advance, thanks!
Startup Procedure |
Procedure |
Status |
Comment |
Acquire Downstream Channel |
525000000 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 |
QAM 256 |
1 |
525000000 Hz |
1.9 dBmV |
40.9 dB |
28836 |
165309 |
2 |
Locked |
QAM 256 |
2 |
531000000 Hz |
1.2 dBmV |
38.9 dB |
27332 |
151927 |
3 |
Locked |
QAM 256 |
3 |
537000000 Hz |
1.9 dBmV |
38.9 dB |
28661 |
160112 |
4 |
Locked |
QAM 256 |
4 |
543000000 Hz |
0.7 dBmV |
38.6 dB |
27783 |
159072 |
5 |
Locked |
QAM 256 |
5 |
549000000 Hz |
1.2 dBmV |
38.9 dB |
27781 |
160517 |
6 |
Locked |
QAM 256 |
6 |
555000000 Hz |
0.2 dBmV |
38.9 dB |
29132 |
159318 |
7 |
Locked |
QAM 256 |
7 |
561000000 Hz |
0.0 dBmV |
38.9 dB |
28048 |
161369 |
8 |
Locked |
QAM 256 |
8 |
567000000 Hz |
-0.5 dBmV |
38.6 dB |
28715 |
163935 |
9 |
Locked |
QAM 256 |
9 |
573000000 Hz |
-0.7 dBmV |
38.6 dB |
28913 |
159461 |
10 |
Locked |
QAM 256 |
10 |
579000000 Hz |
-0.7 dBmV |
38.9 dB |
28360 |
164248 |
11 |
Locked |
QAM 256 |
11 |
585000000 Hz |
-1.9 dBmV |
38.6 dB |
28576 |
169862 |
12 |
Locked |
QAM 256 |
12 |
591000000 Hz |
-1.5 dBmV |
38.6 dB |
27034 |
161395 |
13 |
Locked |
QAM 256 |
13 |
597000000 Hz |
-1.5 dBmV |
38.6 dB |
29036 |
156658 |
14 |
Locked |
QAM 256 |
14 |
603000000 Hz |
-1.5 dBmV |
38.9 dB |
27853 |
161655 |
15 |
Locked |
QAM 256 |
15 |
609000000 Hz |
-2.2 dBmV |
38.6 dB |
27502 |
165774 |
16 |
Locked |
QAM 256 |
16 |
615000000 Hz |
-1.0 dBmV |
38.6 dB |
29349 |
156414 |
17 |
Locked |
QAM 256 |
17 |
621000000 Hz |
-1.5 dBmV |
38.6 dB |
27755 |
155549 |
18 |
Locked |
QAM 256 |
18 |
627000000 Hz |
-1.0 dBmV |
38.6 dB |
28708 |
151429 |
19 |
Locked |
QAM 256 |
19 |
633000000 Hz |
-0.7 dBmV |
38.9 dB |
27632 |
141523 |
20 |
Locked |
QAM 256 |
20 |
639000000 Hz |
-1.2 dBmV |
38.6 dB |
27073 |
145317 |
21 |
Locked |
QAM 256 |
21 |
645000000 Hz |
-1.2 dBmV |
38.9 dB |
25100 |
138638 |
22 |
Locked |
QAM 256 |
22 |
651000000 Hz |
-1.9 dBmV |
38.6 dB |
25241 |
145396 |
23 |
Locked |
QAM 256 |
23 |
657000000 Hz |
-1.0 dBmV |
38.6 dB |
24686 |
128785 |
24 |
Locked |
QAM 256 |
24 |
663000000 Hz |
-1.5 dBmV |
38.9 dB |
24221 |
121395 |
25 |
Locked |
QAM 256 |
25 |
669000000 Hz |
-1.0 dBmV |
38.6 dB |
2181 |
11447 |
26 |
Locked |
QAM 256 |
26 |
675000000 Hz |
-1.7 dBmV |
38.2 dB |
1806 |
11273 |
27 |
Locked |
QAM 256 |
27 |
681000000 Hz |
-1.4 dBmV |
38.2 dB |
1874 |
11740 |
28 |
Locked |
QAM 256 |
28 |
687000000 Hz |
-1.9 dBmV |
38.2 dB |
1970 |
10671 |
29 |
Locked |
QAM 256 |
29 |
693000000 Hz |
-2.0 dBmV |
38.6 dB |
1944 |
10357 |
30 |
Locked |
QAM 256 |
30 |
699000000 Hz |
-2.2 dBmV |
38.2 dB |
1914 |
9654 |
31 |
Locked |
QAM 256 |
31 |
705000000 Hz |
-2.9 dBmV |
38.2 dB |
1818 |
11280 |
32 |
Locked |
QAM 256 |
32 |
711000000 Hz |
-2.7 dBmV |
37.6 dB |
1851 |
10798 |
|
|
|
|
Upstream Bonded Channels |
|
Channel |
Lock Status |
US Channel Type |
Channel ID |
Symbol Rate |
Frequency |
Power |
1 |
Locked |
ATDMA |
4 |
5120 Ksym/sec |
16400000 Hz |
45.0 dBmV |
2 |
Locked |
ATDMA |
3 |
5120 Ksym/sec |
22800000 Hz |
45.5 dBmV |
3 |
Locked |
ATDMA |
2 |
5120 Ksym/sec |
29200000 Hz |
45.8 dBmV |
4 |
Locked |
ATDMA |
1 |
5120 Ksym/sec |
35600000 Hz |
46.5 dBmV |
5 |
Locked |
ATDMA |
5 |
2560 Ksym/sec |
40400000 Hz |
46.8 dBmV |
6 |
Not Locked |
N/A |
Unknown |
0 Ksym/sec |
0 Hz |
0.0 dBmV |
7 |
Not Locked |
N/A |
Unknown |
0 Ksym/sec |
0 Hz |
0.0 dBmV |
8 |
Not Locked |
N/A |
Unknown |
0 Ksym/sec |
0 Hz |
0.0 dBmV |
|
|
|
|
Current System Time: Sat Sep 25 14:20:04 2021 |
|
System Up Time: 1 day 17:09:56 |
|
EG
Expert
•
89.9K Messages
1 m ago
The signal stats are good if they are remaining stable. Are there any modem error log entries being shown ? If so, please also post them in their entirety (copy and paste them) but redact the CM and the CMTS MAC addresses for your privacy or else the forum bot will not allow your post to be seen publically.
Also. Is this with a WiFi connection ? If so, for a test, does a computer / device that is hardwired directly to the Nighthawk router with an ethernet cable have the same problem ?
With this test, we are trying to isolate this from being either a WiFi-only problem or a problem with the general connection to the Comcast system which would of course affect both. It's a good first step of troubleshooting before proceeding any further.
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0
hsanchez97
Visitor
•
6 Messages
1 m ago
I don't have anything hardwired to the router. Here is the log
Time
Priority
Description
Aug 16 2021 19:48:14
Warning (5)
MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Aug 16 2021 19:48:14
Warning (5)
MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Aug 16 2021 19:48:14
Warning (5)
MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Aug 16 2021 19:48:14
Warning (5)
MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Aug 16 2021 19:48:14
Warning (5)
MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Aug 16 2021 19:48:14
Warning (5)
MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Aug 17 2021 12:22:53
Critical (3)
No Ranging Response received - T3 time-out
Aug 18 2021 14:33:05
Warning (5)
MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Aug 19 2021 11:04:57
Critical (3)
SYNC Timing Synchronization failure - Loss of Sync
Aug 19 2021 16:34:51
Critical (3)
No Ranging Response received - T3 time-out
Aug 20 2021 08:25:37
Critical (3)
SYNC Timing Synchronization failure - Loss of Sync
Aug 21 2021 23:12:53
Critical (3)
No Ranging Response received - T3 time-out
Aug 27 2021 00:30:47
Critical (3)
SYNC Timing Synchronization failure - Loss of Sync
Aug 27 2021 22:43:05
Critical (3)
No Ranging Response received - T3 time-out
Sep 01 2021 17:41:52
Critical (3)
SYNC Timing Synchronization failure - Loss of Sync
Sep 02 2021 08:58:09
Warning (5)
Lost MDD Timeout
Sep 03 2021 05:18:30
Critical (3)
SYNC Timing Synchronization failure - Loss of Sync
Sep 04 2021 03:39:40
Critical (3)
No Ranging Response received - T3 time-out
Sep 07 2021 22:24:46
Critical (3)
SYNC Timing Synchronization failure - Loss of Sync
Sep 08 2021 17:17:44
Warning (5)
MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Sep 08 2021 17:18:13
Critical (3)
No Ranging Response received - T3 time-out
Sep 11 2021 07:12:06
Warning (5)
MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Sep 13 2021 12:43:59
Critical (3)
No Ranging Response received - T3 time-out
Sep 15 2021 14:57:06
Warning (5)
MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Sep 15 2021 17:36:22
Critical (3)
No Ranging Response received - T3 time-out
Sep 16 2021 13:12:24
Warning (5)
MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Sep 16 2021 13:40:19
Error (4)
Service Change Response rejected - Invalid transaction ID
Sep 16 2021 17:53:13
Critical (3)
SYNC Timing Synchronization failure - Loss of Sync
Sep 18 2021 07:59:18
Critical (3)
No Ranging Response received - T3 time-out
Sep 19 2021 13:22:10
Critical (3)
SYNC Timing Synchronization failure - Loss of Sync
Sep 19 2021 13:28:20
Critical (3)
No Ranging Response received - T3 time-out
Sep 20 2021 09:34:21
Critical (3)
SYNC Timing Synchronization failure - Loss of Sync
Sep 20 2021 14:38:28
Critical (3)
No Ranging Response received - T3 time-out
Sep 21 2021 06:44:47
Critical (3)
SYNC Timing Synchronization failure - Loss of Sync
Sep 22 2021 01:47:49
Critical (3)
No Ranging Response received - T3 time-out
Sep 22 2021 21:13:44
Critical (3)
SYNC Timing Synchronization failure - Loss of Sync
Sep 23 2021 03:58:51
Critical (3)
No Ranging Response received - T3 time-out
Sep 23 2021 09:47:16
Critical (3)
SYNC Timing Synchronization failure - Loss of Sync
Time Not Established
Critical (3)
No Ranging Response received - T3 time-out
Sep 23 2021 21:06:09
Warning (5)
MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Time Not Established
Critical (3)
No Ranging Response received - T3 time-out
Sep 23 2021 21:11:18
Warning (5)
MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Sep 25 2021 01:41:54
Critical (3)
SYNC Timing Synchronization failure - Loss of Sync
Sep 25 2021 05:09:20
Error (4)
DCC-ACK rejected authentication failure
Sep 25 2021 05:45:54
Critical (3)
SYNC Timing Synchronization failure - Loss of Sync
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0
EG
Expert
•
89.9K Messages
1 m ago
@hsanchez97 wrote: "I don't have anything hardwired to the router."
O/k so can you do so temporarily for the purposes of performing that test that I mentioned ?
0
0
hsanchez97
Visitor
•
6 Messages
1 m ago
ok, i will have to figure something out since we don't have any devices near the router. Will report back, thanks!
7
0
EG
Expert
•
89.9K Messages
1 m ago
Even though the signal stats looked o/k at that snapshot in time, the error log entries confirm that something is going on. Perhaps there is noise ingress into the line(s) / an upstream channel-return path impairment somewhere.
There are other signal stat figures that can't be read by the modem. They are the "Upstream Rx Power" (Upstream Receive Power Level), the "Upstream SNR Ch." (Upstream Signal To Noise Ratio), and the "Upstream ICFR" (In Channel Frequency Response). These are as equally important in diagnosing connectivity issues as are the modem's stats.
So in the meantime, I'm going to go ahead and escalate your issue anyway to the Comcast corporate employees that are available to these boards. They can check the CMTS (Cable Modem Termination System) for any real time degradation and / or error reports, see your node / cable plant and modem health, and see whether or not everything is in the green zone. They can also see a history plot for the modem and poll for those upstream receive signal stats.
You should get a reply here in your topic. Good luck !
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LAK2021
Visitor
•
1 Message
1 m ago
I have the same issues at my home. Works well for a but, and then internet is constantly dropping. very frustrating. when I contact XFI they only help with troubleshooting, and will get it to reconnect, but constantly dealing with this is frustrating. I am wondering if it is my area, because i have changed equipment twice.
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