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Geek level - High - Netgear CM700 DOCSIS 3.0 Modem / EERO

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Geek level - High - Netgear CM700 DOCSIS 3.0 Modem / EERO

I've installed a Netgear CM700 DOCSIS 3.0 on my Xfinity internet service and I'm using EERO's second generation wifi.  Long story short.  3 days ago, I started having wild fluctuations in my internet speeds from 0 - 243 on Download and 0 - 14 on upload.   

 

Question:  I've noticed that Comcast Houston is only locking 28 Down and 4 up channels of the 32/8 I have available.  Does this cause issues?   Netgear tech though it might.

 

Question 2:  When I was done trouble shooting with EERO, Xfinity, Netgear, I came back around with some facts from Netgear.  The upload signal was on the high side and causing the internet up speeds to die off at the end of tests.  Also, the above comments about the locking channels.  Xfinity is sending a tech tomorrow because, evidentily the node in my hood is "sick."   Any other thougths of what can be causing the internet disconnects?  Everything else in my network has checked out twice.

 

Thanks!!!

Eric C. Lindberg
Expert

Re: Geek level - High - Netgear CM700 DOCSIS 3.0 Modem / EERO

What are the modem's signal stat figures. Get them here: http://192.168.100.1

Post the downstream and the upstream power levels and the SNR figures.


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New Poster

Re: Geek level - High - Netgear CM700 DOCSIS 3.0 Modem / EERO

<tabindex=-1>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 honorMdd(4)

Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables UnCorrectables
1 Locked QAM 256 1 513000000 Hz 4.4 dBmV 38.9 dB 156 1129
2 Locked QAM 256 2 519000000 Hz 4.9 dBmV 38.6 dB 141 98
3 Locked QAM 256 3 525000000 Hz 5.1 dBmV 38.6 dB 119 57
4 Locked QAM 256 4 531000000 Hz 5.5 dBmV 38.6 dB 50 54
5 Locked QAM 256 5 537000000 Hz 5.6 dBmV 38.6 dB 27 85
6 Locked QAM 256 6 543000000 Hz 5.6 dBmV 38.9 dB 62 94
7 Locked QAM 256 7 549000000 Hz 6.0 dBmV 38.6 dB 190 100
8 Locked QAM 256 8 555000000 Hz 6.1 dBmV 38.6 dB 426 137
9 Locked QAM 256 9 561000000 Hz 6.4 dBmV 38.9 dB 890 2481
10 Locked QAM 256 10 567000000 Hz 6.5 dBmV 38.9 dB 1529 6627
11 Locked QAM 256 11 573000000 Hz 6.6 dBmV 38.9 dB 2276 6271
12 Locked QAM 256 12 579000000 Hz 6.5 dBmV 38.6 dB 4657 12664
13 Locked QAM 256 13 585000000 Hz 6.4 dBmV 38.6 dB 5027 12834
14 Locked QAM 256 14 591000000 Hz 6.4 dBmV 38.9 dB 12625 25264
15 Locked QAM 256 15 597000000 Hz 6.5 dBmV 38.9 dB 16585 35610
16 Locked QAM 256 16 603000000 Hz 6.8 dBmV 38.9 dB 21012 48415
17 Locked QAM 256 17 609000000 Hz 6.9 dBmV 38.6 dB 39841 105833
18 Locked QAM 256 18 615000000 Hz 7.1 dBmV 38.9 dB 16584 42341
19 Locked QAM 256 19 621000000 Hz 7.1 dBmV 38.9 dB 54303 134251
20 Locked QAM 256 20 627000000 Hz 7.3 dBmV 38.9 dB 9577 31438
21 Locked QAM 256 21 633000000 Hz 7.0 dBmV 38.9 dB 27375 71653
22 Locked QAM 256 22 639000000 Hz 7.0 dBmV 38.6 dB 9052 13469
23 Locked QAM 256 23 645000000 Hz 6.6 dBmV 38.9 dB 24391 49864
24 Locked QAM 256 24 651000000 Hz 6.9 dBmV 38.9 dB 328 859
25 Locked QAM 256 25 657000000 Hz 6.0 dBmV 39.2 dB 399 3800
26 Locked QAM 256 26 663000000 Hz 6.0 dBmV 38.6 dB 602 3819
27 Locked QAM 256 27 669000000 Hz 5.5 dBmV 38.9 dB 30 729
28 Locked QAM 256 28 675000000 Hz 5.0 dBmV 38.9 dB 289470 1490052
29 Not Locked N/A N/A 0 Hz 0.0 dBmV 0.0 dB 0 0
30 Not Locked N/A N/A 0 Hz 0.0 dBmV 0.0 dB 0 0
31 Not Locked N/A N/A 0 Hz 0.0 dBmV 0.0 dB 0 0
32 Not Locked N/A N/A 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 4 5120 Ksym/sec 16500000 Hz 43.5 dBmV
2 Locked ATDMA 3 5120 Ksym/sec 23000000 Hz 42.5 dBmV
3 Locked ATDMA 2 5120 Ksym/sec 29600000 Hz 41.3 dBmV
4 Locked ATDMA 1 5120 Ksym/sec 36100000 Hz 40.3 dBmV
5 Not Locked N/A Unknown 0 Ksym/sec 0 Hz 0.0 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
Eric C. Lindberg
New Poster

Re: Geek level - High - Netgear CM700 DOCSIS 3.0 Modem / EERO

Its happening again.  It started after a firewall push by Xfinity about a month ago.  Neighbors are expereiencing similar inconsistent connection.

 

here is the Net Gear event log:

 

 
 
Time Priority Description
Apr 03 2018 13:05:16 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Apr 03 2018 13:05:16 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Apr 03 2018 13:05:16 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Apr 03 2018 13:05:16 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Apr 03 2018 13:05:16 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Apr 03 2018 13:05:16 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Apr 03 2018 13:23:00 Critical (3) SYNC Timing Synchronization failure - Loss of Sync
Apr 03 2018 13:57:19 Warning (5) Lost MDD Timeout
Apr 03 2018 14:02:39 Critical (3) SYNC Timing Synchronization failure - Loss of Sync
Apr 03 2018 15:03:56 Critical (3) No Ranging Response received - T3 time-out
Apr 03 2018 15:34:39 Critical (3) SYNC Timing Synchronization failure - Loss of Sync
Apr 03 2018 19:54:43 Critical (3) No Ranging Response received - T3 time-out
Apr 04 2018 10:43:45 Warning (5) Lost MDD Timeout
Apr 04 2018 20:44:23 Critical (3) No Ranging Response received - T3 time-out
Apr 05 2018 10:04:52 Critical (3) SYNC Timing Synchronization failure - Loss of Sync
Time Not Established Critical (3) No Ranging Response received - T3 time-out
Time Not Established Critical (3) SYNC Timing Synchronization failure - Loss of Sync
Time Not Established Warning (5) ToD request sent - No Response received
Time Not Established Critical (3) TFTP Request Retries exceeded, CM unable to register
Time Not Established Warning (5) ToD request sent - No Response received
Time Not Established Critical (3) SYNC Timing Synchronization failure - Loss of Sync
Time Not Established Warning (5) ToD request sent - No Response received
Time Not Established Critical (3) SYNC Timing Synchronization failure - Loss of Sync
Time Not Established Warning (5) ToD request sent - No Response received
Time Not Established Critical (3) No Ranging Response received - T3 time-out
Apr 05 2018 12:42:01 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Apr 05 2018 12:42:10 Critical (3) SYNC Timing Synchronization failure - Loss of Sync
Time Not Established Critical (3) No Ranging Response received - T3 time-out
Time Not Established Critical (3) SYNC Timing Synchronization failure - Loss of Sync
Apr 05 2018 12:56:43 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Apr 05 2018 12:59:34 Critical (3) SYNC Timing Synchronization failure - Loss of Sync
Apr 05 2018 13:50:16 Warning (5) Lost MDD Timeout
Apr 05 2018 13:50:18 Critical (3) SYNC Timing Synchronization failure - Loss of Sync
Apr 05 2018 14:42:41 Critical (3) No Ranging Response received - T3 time-out
Apr 05 2018 14:42:49 Critical (3) SYNC Timing Synchronization failure - Loss of Sync
Apr 05 2018 15:32:35 Critical (3) No Ranging Response received - T3 time-out
Apr 05 2018 15:32:40 Critical (3) SYNC Timing Synchronization failure - Loss of Sync
Time Not Established Critical (3) No Ranging Response received - T3 time-out
Apr 05 2018 18:47:32 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Apr 05 2018 18:57:46 Critical (3) SYNC Timing Synchronization failure - Loss of Sync
Time Not Established Critical (3) No Ranging Response received - T3 time-out
Apr 05 2018 20:20:23 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Apr 06 2018 07:32:18 Critical (3) SYNC Timing Synchronization failure - Loss of Sync
Apr 06 2018 12:08:38 Critical (3) No Ranging Response received - T3 time-out
Apr 06 2018 12:11:10 Critical (3) SYNC Timing Synchronization failure - Loss of Sync
Eric C. Lindberg
Expert

Re: Geek level - High - Netgear CM700 DOCSIS 3.0 Modem / EERO

FWIW, so 4 months later, the signal stats are still o/k.



I am not a Comcast Employee.
I am a fellow customer, volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.

Was your question answered? Mark the post as best answer!
Expert

Re: Geek level - High - Netgear CM700 DOCSIS 3.0 Modem / EERO

Hi @OnTheFly1

Looks like you have some FEC errors going on there. Reboot your modem and watch the "uncorrectables" if they start adding up quickly it's a clue that there is an RF error someplace. Also, your event logs are also indicating an issue as well. Since we can't see a lot of info from just your modem...

 

I've asked an employee to check the CMTS for real-time and historical RF signal reports from your modem. They can also check your local Node/Plant for any degradation or error reports.


I am not an employee.
Official Employee

Re: Geek level - High - Netgear CM700 DOCSIS 3.0 Modem / EERO

 

OnTheFly1, let's check those signals. Please send me a private message with your full name and account related phone number for help.