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NETGEAR Nighthawk Dual Band AC1900 Cable Modem Router - Critical messages every 2 minutes

New Poster

NETGEAR Nighthawk Dual Band AC1900 Cable Modem Router - Critical messages every 2 minutes

I recently switched to this modem/router, since i switched i constantly get no wifi or slow internet. I checked in logs and i see this critical error every 3 minutes - 10 minutes and my log is full this happens all day everyday. I have 150 MBPS connection. When i plug in my ethercord and do speed test i am getting 65/5.4 (Download/Upload)when i do wireless i get about 20/3.5. Are these common speeds? day time theya re better but evening is the worst sometimes drops downt o 1.9/4.3, any suggestions on improving/fixing this?

 

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=cc:40:d0:c3:13:98;CMTS-MAC=00:38:df:9a:7a:b0;CM-QOS=1.1;CM-VER=3.0;

 

Time Priority Description
2019-3-13, 07:45:57 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=cc:40:d0:c3:13:98;CMTS-MAC=00:38:df:9a:7a:b0;CM-QOS=1.1;CM-VER=3.0;
2019-3-13, 07:56:36 Critical (3) Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=cc:40:d0:c3:13:98;CMTS-MAC=00:38:df:9a:7a:b0;CM-QOS=1.1;CM-VER=3.0;
2019-3-13, 07:56:36 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 3;CM-MAC=cc:40:d0:c3:13:98;CMTS-MAC=00:38:df:9a:7a:b0;CM-QOS=1.1;CM-VER=3.0;
2019-3-13, 07:57:35 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=cc:40:d0:c3:13:98;CMTS-MAC=00:38:df:9a:7a:b0;CM-QOS=1.1;CM-VER=3.0;
2019-3-13, 08:09:34 Critical (3) Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=cc:40:d0:c3:13:98;CMTS-MAC=00:38:df:9a:7a:b0;CM-QOS=1.1;CM-VER=3.0;
2019-3-13, 08:09:34 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 2;CM-MAC=cc:40:d0:c3:13:98;CMTS-MAC=00:38:df:9a:7a:b0;CM-QOS=1.1;CM-VER=3.0;
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Expert

Re: NETGEAR Nighthawk Dual Band AC1900 Cable Modem Router - Critical messages every 2 minutes

Please refer to these posts:

 

  


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New Poster

Re: NETGEAR Nighthawk Dual Band AC1900 Cable Modem Router - Critical messages every 2 minutes

Love to provide the downstrea/upstream signal strenghts. The instructions given  are for Aris modem? for the modem model i posted, i do not find where to get the same results. I have already included/modem-router model#, error logs.

New Poster

Re: NETGEAR Nighthawk Dual Band AC1900 Cable Modem Router - Critical messages every 2 minutes

Found them :-)

 

Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 9 543000000 Hz 3.1 dBmV 38.3 dB 142 657
2 Locked QAM256 2 489000000 Hz 3.3 dBmV 38.3 dB 135 661
3 Locked QAM256 3 495000000 Hz 3.1 dBmV 38.2 dB 121 675
4 Locked QAM256 4 507000000 Hz 3 dBmV 37.7 dB 1 0
5 Locked QAM256 5 513000000 Hz 3.1 dBmV 38.3 dB 125 675
6 Locked QAM256 6 519000000 Hz 2.9 dBmV 38.2 dB 132 671
7 Locked QAM256 7 525000000 Hz 3.3 dBmV 38.4 dB 132 665
8 Locked QAM256 8 531000000 Hz 3.1 dBmV 38.3 dB 122 679
9 Locked QAM256 1 483000000 Hz 3 dBmV 38 dB 130 675
10 Locked QAM256 10 549000000 Hz 3.4 dBmV 38.4 dB 122 677
11 Locked QAM256 11 555000000 Hz 3 dBmV 38.1 dB 122 676
12 Locked QAM256 12 561000000 Hz 3.1 dBmV 38.3 dB 70 333
13 Locked QAM256 13 567000000 Hz 2.8 dBmV 38.2 dB 141 660
14 Locked QAM256 14 573000000 Hz 3.2 dBmV 38.4 dB 80 327
15 Locked QAM256 15 579000000 Hz 2.9 dBmV 38.2 dB 138 664
16 Locked QAM256 16 585000000 Hz 3.1 dBmV 38.3 dB 74 329
17 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
18 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
19 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
20 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
21 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
22 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
23 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
24 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
 
Upstream Bonded Channels (Partial Service)
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 1 5120 Ksym/sec 30100000 Hz 38.5 dBmV
2 Locked ATDMA 2 5120 Ksym/sec 36500000 Hz 38.4 dBmV
3 Not Locked Unknown 3 0 Ksym/sec 17300000 Hz 0.0 dBmV
4 Not Locked Unknown 4 0 Ksym/sec 23700000 Hz 0.0 dBmV
5 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
6 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
7 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
8 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
New Poster

Re: NETGEAR Nighthawk Dual Band AC1900 Cable Modem Router - Critical messages every 2 minutes

Now i have below: 0 correctable and 0 uncorrectables, is this normal?

1 Locked QAM256 1 483000000 Hz 2.9 dBmV 38.7 dB 0 0
2 Locked QAM256 2 489000000 Hz 3.1 dBmV 38.9 dB 0 0
3 Locked QAM256 3 495000000 Hz 3 dBmV 38.8 dB 0 0
4 Locked QAM256 4 507000000 Hz 2.9 dBmV 38.3 dB 0 0
Expert

Re: NETGEAR Nighthawk Dual Band AC1900 Cable Modem Router - Critical messages every 2 minutes

In that last pic there are only 4 downstream channels shown. Are there any more ? The first pic showed 16 downstream channels locked and only 2 upstream channels. There should be at least 3 or 4.

 

Have you first tried powercycling / re-starting the device ? No joy ? Try hard resetting the device to factory defaults by pressing and holding in the recessed reset button on the rear for 30 seconds. You will lose any customized settings.



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New Poster

Re: NETGEAR Nighthawk Dual Band AC1900 Cable Modem Router - Critical messages every 2 minutes

oops sorry..here is it all, yep rebooted few times already

 

Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 1 483000000 Hz 3.3 dBmV 38.9 dB 0 0
2 Locked QAM256 2 489000000 Hz 3.5 dBmV 39.1 dB 0 0
3 Locked QAM256 3 495000000 Hz 3.3 dBmV 39 dB 0 0
4 Locked QAM256 4 507000000 Hz 3.2 dBmV 38.4 dB 0 0
5 Locked QAM256 5 513000000 Hz 3.5 dBmV 39 dB 0 0
6 Locked QAM256 6 519000000 Hz 3.3 dBmV 38.9 dB 0 0
7 Locked QAM256 7 525000000 Hz 3.7 dBmV 39.1 dB 0 0
8 Locked QAM256 8 531000000 Hz 3.5 dBmV 39 dB 0 0
9 Locked QAM256 9 543000000 Hz 3.6 dBmV 39.1 dB 0 0
10 Locked QAM256 10 549000000 Hz 3.8 dBmV 39.2 dB 0 0
11 Locked QAM256 11 555000000 Hz 3.5 dBmV 39 dB 0 0
12 Locked QAM256 12 561000000 Hz 3.6 dBmV 39.1 dB 0 0
13 Locked QAM256 13 567000000 Hz 3.3 dBmV 39.1 dB 0 0
14 Locked QAM256 14 573000000 Hz 3.7 dBmV 39.2 dB 0 0
15 Locked QAM256 15 579000000 Hz 3.3 dBmV 39.1 dB 0 0
16 Locked QAM256 16 585000000 Hz 3.5 dBmV 39 dB 0 0
17 Locked QAM256 17 591000000 Hz 3.6 dBmV 39.4 dB 0 0
18 Locked QAM256 18 597000000 Hz 3.9 dBmV 39.4 dB 0 0
19 Locked QAM256 19 603000000 Hz 3.7 dBmV 39.4 dB 0 0
20 Locked QAM256 20 609000000 Hz 3.9 dBmV 39.4 dB 0 0
21 Locked QAM256 21 615000000 Hz 3.7 dBmV 39.4 dB 0 0
22 Locked QAM256 22 621000000 Hz 3.9 dBmV 39.4 dB 0 0
23 Locked QAM256 23 627000000 Hz 2.9 dBmV 39 dB 0 0
24 Locked QAM256 24 633000000 Hz 2.2 dBmV 38.7 dB 0 0
 
Upstream Bonded Channels (Partial Service)
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 1 5120 Ksym/sec 30100000 Hz 38.5 dBmV
2 Locked ATDMA 2 5120 Ksym/sec 36500000 Hz 38.5 dBmV
3 Not Locked Unknown 3 0 Ksym/sec 17300000 Hz 0.0 dBmV
4 Not Locked Unknown 4 0 Ksym/sec 23700000 Hz 0.0 dBmV
5 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
6 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
7 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
8 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
Expert

Re: NETGEAR Nighthawk Dual Band AC1900 Cable Modem Router - Critical messages every 2 minutes

Now that looks normal except that there *probably* should be more than 2 bonded upstream channels as I stated earlier. I can't be certain about that because your particular local system may still only offer 2, but most systems have 3 or 4 these days. You could still try that full factory reset as I suggested earlier if you haven't yet done so.



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Official Employee

Re: NETGEAR Nighthawk Dual Band AC1900 Cable Modem Router - Critical messages every 2 minutes

Adding to EG, it’s possible that there’s a high pass noise filter in place (it would knock out those 2 frequencies).

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Expert

Re: NETGEAR Nighthawk Dual Band AC1900 Cable Modem Router - Critical messages every 2 minutes


@ComcastAndrew wrote:
Adding to EG, it’s possible that there’s a high pass noise filter in place (it would knock out those 2 frequencies).

Agreed.



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New Poster

Re: NETGEAR Nighthawk Dual Band AC1900 Cable Modem Router - Critical messages every 2 minutes

Do i need comcast tech visit? or reset router? at night time the spee drops down to 40 MBPS and lot of slow connections too.