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Netgear CM1200 Modem - Started Unicast Maintenance Ranging - No Response received - T3 time-out

Geronimo926
Regular Visitor

Netgear CM1200 Modem - Started Unicast Maintenance Ranging - No Response received - T3 time-out

Hello,

 

I am receiving a number of Critical errors on my Netgear CM1200 modem.  I was hoping that someone on these forums could assist me.

 

I have attempted rebooting the modem and checking connections numerous times to no avail.

 

Here are the error messages from today.  Any guidance or introduction to a Comcast employee that  can assist would be greatly appreciated.

 

Time

Priority

Description

Tue Jan 26 19:55:48 2021

Critical (3)

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 19:55:37 2021

Notice (6)

CM-STATUS message sent. Event Type Code: 5; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 19:55:00 2021

Critical (3)

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 19:54:54 2021

Critical (3)

No Ranging Response received - T3 time-out;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 19:54:53 2021

Critical (3)

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 19:54:51 2021

Critical (3)

No Ranging Response received - T3 time-out;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 19:54:51 2021

Critical (3)

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 19:54:50 2021

Warning (5)

Dynamic Range Window violation

Tue Jan 26 19:54:50 2021

Warning (5)

RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 19:54:50 2021

Warning (5)

Dynamic Range Window violation

Tue Jan 26 19:54:50 2021

Warning (5)

RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 19:54:44 2021

Critical (3)

SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 19:54:44 2021

Notice (6)

DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 19:54:39 2021

Notice (6)

TLV-11 - unrecognized OID;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Time Not Established

Notice (6)

Honoring MDD; IP provisioning mode = IPv6

Time Not Established

Critical (3)

No Ranging Response received - T3 time-out;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Time Not Established

Critical (3)

SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 19:50:06 2021

Critical (3)

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 13:02:15 2021

Notice (6)

CM-STATUS message sent. Event Type Code: 4; Chan ID: 14 28; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 13:02:05 2021

Notice (6)

CM-STATUS message sent. Event Type Code: 5; Chan ID: 14 28 29 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 13:01:59 2021

Notice (6)

CM-STATUS message sent. Event Type Code: 5; Chan ID: 14 29 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 13:01:58 2021

Notice (6)

CM-STATUS message sent. Event Type Code: 2; Chan ID: 28; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 13:01:56 2021

Warning (5)

MDD message timeout;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 13:01:51 2021

Notice (6)

CM-STATUS message sent. Event Type Code: 2; Chan ID: 28; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 12:58:47 2021

Critical (3)

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 11:33:56 2021

Notice (6)

CM-STATUS message sent. Event Type Code: 4; Chan ID: 14; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 11:33:51 2021

Notice (6)

CM-STATUS message sent. Event Type Code: 5; Chan ID: 14 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 11:33:43 2021

Warning (5)

MDD message timeout;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 11:33:39 2021

Notice (6)

CM-STATUS message sent. Event Type Code: 2; Chan ID: 14; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 08:32:10 2021

Critical (3)

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 08:09:12 2021

Notice (6)

CM-STATUS message sent. Event Type Code: 5; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 08:09:09 2021

Critical (3)

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 08:06:28 2021

Notice (6)

DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 08:06:27 2021

Critical (3)

REG RSP not received;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 08:06:24 2021

Notice (6)

TLV-11 - unrecognized OID;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 08:06:18 2021

Warning (5)

ToD request sent - No Response received;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 08:06:07 2021

Notice (6)

Honoring MDD; IP provisioning mode = IPv6

Tue Jan 26 08:06:04 2021

Critical (3)

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 08:05:54 2021

Critical (3)

No Ranging Response received - T3 time-out;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:01:5c:74:a8:7d;CM-QOS=1.1;CM-VER=3.1;

Tue Jan 26 08:05:48 2021

Critical (3)

SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:41:3c:b8;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;

EG
Expert

Re: Netgear CM1200 Modem - Started Unicast Maintenance Ranging - No Response received - T3 time-out

Are you actually experiencing any connectivity problems or are you just focusing on those error log entries ?

 

Please also post the *Downstream Power Level*, the *Upstream Power Level*, and the *SNR* (Signal to Noise Ratio) numbers.





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Geronimo926
Regular Visitor

Re: Netgear CM1200 Modem - Started Unicast Maintenance Ranging - No Response received - T3 time-out

Hello @EG ,

 

Thank you for your quick response!  Here are the answers to your questions.

 

1. Are you actually experiencing any connectivity problems or are you just focusing on those error log entries?

Yes, our service degrades to the point of being unusable. I reboot and it seems to work again for some time and then we run into the same service issues.

 

2. Please also post the *Downstream Power Level*, the *Upstream Power Level*, and the *SNR* (Signal to Noise Ratio) numbers.

 

 

Startup Procedure

Procedure

Status

Comment

Acquire Downstream Channel

507000000 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

20

507000000 Hz

-4.5 dBmV

38.6 dB

315

0

2

Locked

QAM256

17

483000000 Hz

-4.7 dBmV

36.7 dB

4

0

3

Locked

QAM256

18

489000000 Hz

-4.7 dBmV

34.8 dB

1

0

4

Locked

QAM256

19

495000000 Hz

-4.5 dBmV

41.4 dB

2

0

5

Locked

QAM256

21

513000000 Hz

-4.4 dBmV

40.5 dB

3

0

6

Locked

QAM256

22

519000000 Hz

-4.4 dBmV

41.6 dB

1

0

7

Locked

QAM256

23

525000000 Hz

-4.7 dBmV

41.7 dB

1

0

8

Locked

QAM256

24

531000000 Hz

-4.8 dBmV

41.7 dB

1

0

9

Locked

QAM256

25

537000000 Hz

-4.8 dBmV

41.6 dB

0

0

10

Locked

QAM256

26

543000000 Hz

-4.9 dBmV

41.6 dB

0

0

11

Locked

QAM256

27

549000000 Hz

-5 dBmV

29 dB

35718

0

12

Locked

QAM256

28

555000000 Hz

-5 dBmV

28.4 dB

1071541

1583

13

Locked

QAM256

29

561000000 Hz

-4.8 dBmV

33 dB

2635

0

14

Locked

QAM256

30

567000000 Hz

-5.1 dBmV

34.6 dB

14

0

15

Locked

QAM256

31

573000000 Hz

-5.3 dBmV

31.3 dB

1732233

3630

16

Locked

QAM256

32

579000000 Hz

-5.2 dBmV

32.4 dB

18525

0

17

Locked

QAM256

33

585000000 Hz

-5 dBmV

35.9 dB

7

0

18

Locked

QAM256

34

591000000 Hz

-5.3 dBmV

36.4 dB

29

0

19

Locked

QAM256

35

597000000 Hz

-5.4 dBmV

39.6 dB

17

0

20

Locked

QAM256

36

603000000 Hz

-5.4 dBmV

40.9 dB

8

0

21

Locked

QAM256

37

609000000 Hz

-5.7 dBmV

40.9 dB

36

0

22

Locked

QAM256

38

615000000 Hz

-6.1 dBmV

41.3 dB

20

0

23

Locked

QAM256

39

621000000 Hz

-6 dBmV

41.4 dB

17

0

24

Locked

QAM256

40

627000000 Hz

-6 dBmV

41.3 dB

109

0

25

Locked

QAM256

41

633000000 Hz

-6.3 dBmV

41.1 dB

4393

0

26

Locked

QAM256

42

639000000 Hz

-6.5 dBmV

41.1 dB

13

0

27

Locked

QAM256

43

645000000 Hz

-6.2 dBmV

41.2 dB

20

0

28

Locked

QAM256

44

651000000 Hz

-6.4 dBmV

41.1 dB

47

0

29

Locked

QAM256

45

657000000 Hz

-6.5 dBmV

41.1 dB

19

0

30

Locked

QAM256

46

663000000 Hz

-6.5 dBmV

41 dB

20

0

31

Locked

QAM256

47

669000000 Hz

-6.5 dBmV

41 dB

0

0

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

5

5120 Ksym/sec

17300000 Hz

51.8 dBmV

2

Locked

ATDMA

6

5120 Ksym/sec

23700000 Hz

51.5 dBmV

3

Locked

ATDMA

7

5120 Ksym/sec

30300000 Hz

51.3 dBmV

4

Locked

ATDMA

8

5120 Ksym/sec

36700000 Hz

51.3 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

48

688000000 Hz

-6.7 dBmV

40.4 dB

1108 ~ 2987

296745404

262621859

0

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

 

Please let me know if there are any other details you need.

 

Many thanks, in advance, for your help and guidance.

 

Best,

 

Paul

EG
Expert

Re: Netgear CM1200 Modem - Started Unicast Maintenance Ranging - No Response received - T3 time-out

The upstream power too high and it may be intermittently fluctuating even higher to out of spec levels. And the downstream power is weak. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.

In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there 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 types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test

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.



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I am a Customer Expert 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!
Geronimo926
Regular Visitor

Re: Netgear CM1200 Modem - Started Unicast Maintenance Ranging - No Response received - T3 time-out

Hello @EG ,

 

Well that was probably the best and most detailed response I have ever had any issue I have posted on a forum!  I will get to work on this and will report back if this fixes my issue(s).

 

Many, many thanks for taking the time to provide me with this information and solution.

 

Cheers,

 

Paul

EG
Expert

Re: Netgear CM1200 Modem - Started Unicast Maintenance Ranging - No Response received - T3 time-out

Thank you very much ! But it may not be 'the solution". Best of luck with it !


I am not a Comcast Employee.
I am a Customer Expert 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!
Geronimo926
Regular Visitor

Re: Netgear CM1200 Modem - Started Unicast Maintenance Ranging - No Response received - T3 time-out

Hi @EG ,

 

I removed two unnecessary old splitters and connected the line drop directly to the cable line that goes to the modem with a VCE F-Type Coaxial RG6 3GHz Connector and things appear to be working well again.

 

I will double check my Event Log tomorrow and see if there are any other issues.

 

Thank you again for your guidance!

 

All the best,

 

Paul

EG
Expert

Re: Netgear CM1200 Modem - Started Unicast Maintenance Ranging - No Response received - T3 time-out

For curiosity. Please post what the stats look like now.



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I am a Customer Expert volunteering my time to help other customers here in the Forums.
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