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user_sc6u8i
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Friday, August 23rd, 2024 3:33 PM

Having connection issues with Netgear CM1200 (Started Unicast Maintenance Ranging - No Response received - T3 time-out)

Hello,

I have been having some connection issues with my home network recently.  I have been experiencing a number of symptoms including connection drops, slow speeds, etc.

My router is a Netgear Nighthawk CM1200.  It has firmware version 3.12.03. Here is a dump of the event log. Pretty sure this is an ISP issue. Please let me know what the next steps may be.

Thank you!

Fri Aug 23 09:03:53 2024 Warning (5) Dynamic Range Window violation
Fri Aug 23 09:03:53 2024 Warning (5) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
Fri Aug 23 08:46:46 2024 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
Fri Aug 23 07:59:07 2024 Warning (5) Dynamic Range Window violation
Fri Aug 23 07:59:07 2024 Warning (5) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
Fri Aug 23 07:59:07 2024 Warning (5) Dynamic Range Window violation
Fri Aug 23 07:59:07 2024 Warning (5) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
Fri Aug 23 07:57:12 2024 Warning (5) Dynamic Range Window violation
Fri Aug 23 07:57:12 2024 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
Fri Aug 23 07:57:12 2024 Warning (5) Dynamic Range Window violation
Fri Aug 23 07:57:12 2024 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
Fri Aug 23 03:40:39 2024 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
Fri Aug 23 02:41:45 2024 Warning (5) Dynamic Range Window violation
Fri Aug 23 02:41:45 2024 Warning (5) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
Fri Aug 23 02:41:45 2024 Warning (5) Dynamic Range Window violation
Fri Aug 23 02:41:45 2024 Warning (5) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
Fri Aug 23 02:20:49 2024 Warning (5) Dynamic Range Window violation
Fri Aug 23 02:20:49 2024 Warning (5) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
Fri Aug 23 02:20:49 2024 Warning (5) Dynamic Range Window violation
Fri Aug 23 02:20:49 2024 Warning (5) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
Fri Aug 23 01:57:58 2024 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
Fri Aug 23 01:12:18 2024 Warning (5) Dynamic Range Window violation
Fri Aug 23 01:12:18 2024 Warning (5) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
Fri Aug 23 01:12:18 2024 Warning (5) Dynamic Range Window violation
Fri Aug 23 01:12:18 2024 Warning (5) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
Fri Aug 23 01:10:24 2024 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
Fri Aug 23 01:10:24 2024 Warning (5) Dynamic Range Window violation
Fri Aug 23 01:10:24 2024 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=;;CM-QOS=1.1;CM-VER=3.1;
Fri Aug 23 01:10:24 2024 Warning (5) Dynamic Range Window violation
Fri Aug 23 01:10:24 2024 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=;;CM-QOS=1.1;CM-VER=3.1;
Fri Aug 23 01:00:53 2024 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
Fri Aug 23 00:03:47 2024 Warning (5) Dynamic Range Window violation
Fri Aug 23 00:03:47 2024 Warning (5) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
Fri Aug 23 00:03:47 2024 Warning (5) Dynamic Range Window violation
Fri Aug 23 00:03:47 2024 Warning (5) RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
Fri Aug 23 00:01:52 2024 Warning (5) Dynamic Range Window violation
Fri Aug 23 00:01:52 2024 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
Fri Aug 23 00:01:52 2024 Warning (5) Dynamic Range Window violation
Fri Aug 23 00:01:52 2024 Warning (5) RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
Thu Aug 22 23:37:54 2024 Notice (6)

CM-STATUS message sent. Event Type Code: 24; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 2 3.;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;

 
Apply               Cancel     
Frequency start Value
This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect.
Starting Frequency
 
Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 549000000 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 QAM256 5 549000000 Hz 3.2 dBmV 39.8 dB 6216 9346
2 Locked QAM256 2 531000000 Hz 3 dBmV 40 dB 6780 9057
3 Locked QAM256 3 537000000 Hz 3.3 dBmV 39.9 dB 6152 8202
4 Locked QAM256 4 543000000 Hz 3.2 dBmV 40 dB 6045 8555
5 Locked QAM256 6 555000000 Hz 3.3 dBmV 39.7 dB 5905 8420
6 Locked QAM256 7 561000000 Hz 3.2 dBmV 39.8 dB 5932 7838
7 Locked QAM256 8 567000000 Hz 3.7 dBmV 40.1 dB 5195 8151
8 Locked QAM256 9 573000000 Hz 3.9 dBmV 40.1 dB 5241 8502
9 Locked QAM256 10 579000000 Hz 3.9 dBmV 40.1 dB 5685 8519
10 Locked QAM256 11 585000000 Hz 4.3 dBmV 40.2 dB 5051 8119
11 Locked QAM256 12 591000000 Hz 4.1 dBmV 40.2 dB 4606 7456
12 Locked QAM256 13 597000000 Hz 4.5 dBmV 40.3 dB 4601 8435
13 Locked QAM256 14 603000000 Hz 4.7 dBmV 40.1 dB 4728 8287
14 Locked QAM256 15 609000000 Hz 4.3 dBmV 40.2 dB 4488 7969
15 Locked QAM256 16 615000000 Hz 4.8 dBmV 40.5 dB 4075 7371
16 Locked QAM256 17 621000000 Hz 4.8 dBmV 40.4 dB 4155 7565
17 Locked QAM256 18 627000000 Hz 4.8 dBmV 40.4 dB 4561 8443
18 Locked QAM256 19 633000000 Hz 4.9 dBmV 40.4 dB 4416 7962
19 Locked QAM256 20 639000000 Hz 4.6 dBmV 40.3 dB 4052 7626
20 Locked QAM256 21 645000000 Hz 4.8 dBmV 40.3 dB 3830 7560
21 Locked QAM256 22 651000000 Hz 5 dBmV 40.1 dB 3856 8156
22 Locked QAM256 23 657000000 Hz 5.1 dBmV 40.2 dB 3719 8414
23 Locked QAM256 24 663000000 Hz 5.5 dBmV 40.2 dB 3572 7498
24 Locked QAM256 25 669000000 Hz 5.2 dBmV 40.1 dB 3331 7398
25 Locked QAM256 26 675000000 Hz 5.2 dBmV 39.6 dB 14431 24037
26 Locked QAM256 27 681000000 Hz 5.1 dBmV 40 dB 7604 13603
27 Locked QAM256 28 687000000 Hz 5.4 dBmV 40 dB 55373 97639
28 Locked QAM256 29 693000000 Hz 5.5 dBmV 39.9 dB 4578 7054
29 Locked QAM256 30 699000000 Hz 5.5 dBmV 39.8 dB 11068 21254
30 Locked QAM256 31 705000000 Hz 5.4 dBmV 39.8 dB 3406 8345
31 Locked QAM256 32 711000000 Hz 5.3 dBmV 39.6 dB 3067 7598
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 Ksym/sec 35600000 Hz 46.8 dBmV
2 Locked ATDMA 2 5120 Ksym/sec 29200000 Hz 46.3 dBmV
3 Locked ATDMA 3 5120 Ksym/sec 22800000 Hz 45.3 dBmV
4 Locked ATDMA 4 5120 Ksym/sec 16400000 Hz 44.5 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
 
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 762000000 Hz 7.2 dBmV 40.1 dB 1108 ~ 2987 2059004366 2003672016 12839
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
 
Extended Upstream Transmit Power
Enable Extended Upstream Transmit Power
 
Current System Time:Fri Aug 23 09:24:30 2024
System Up Time:2 days 14:48:20

Question

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Updated 

4 months ago

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XfinityPeterH

Official Employee

 • 

1.5K Messages

4 months ago

@user_sc6u8i thanks for reaching out and letting us know about your connection. Please feel free to send us your full name and complete address in a direct message:

(Full credit to @BruceW for this excellent explanation!) 


"Search for Xfinity Support" won't work. To send a "Direct Messaging" message to Xfinity Support:


 • Click "Sign In" if necessary


 • Click the "Direct Messaging" icon or https://forums.xfinity.com/direct-messaging


 • Click the "New message" (pencil and paper) icon


 • The "To:" line prompts you to "Type the name of a person". Instead, type "Xfinity Support" there


 •  - As you are typing a drop-down list appears. Select "Xfinity Support" from that list


 •  - An "Xfinity Support" graphic replaces the "To:" line


 • Type your message in the text area near the bottom of the window


 • Press Enter to send it


See https://forums.xfinity.com/conversations/email/cant-create-a-new-email-address/605e52b726aa974d63032d02?commentId=606107ea738c7f46a02b830e for an example.

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EG

Expert

 • 

107.5K Messages

4 months ago

@user_sc6u8i @XfinityPeterH 

Please circle back here and post any possible solutions for the issue here in these open public forums so that all readers here may benefit from the exchange / info. This is in keeping with the spirit for which these public help forums were originally intended. Thank you.

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