Downstream Channels will not bond. Very bad connection.

Question

Good morning. I have a Netgear C7000. I started having issues about 2 months ago and a tech was out and replaced outside line. No splitters or anything are between the cable modem/router and where it comes into the wall. In the last 3 days I have had numerous channels that will not bond downstream. I work for the Dept of Veteran Affairs and need a functioning connection to work remotely. I have no clue what could be causing this problem. I have done a factory reset and numerous restarts.&nbsp; Here are my logs.

Startup Procedure

Procedure

Status

Comment

Acquire Downstream Channel

927000000 Hz

Locked

Connectivity State

OK

Operational

Boot State

OK

Operational

Security

Enabled

BPI+

IP Provisioning Mode

Honor MDD

honorMdd(4)

&nbsp;

Downstream Bonded Channels (Partial Service)

Channel

Lock Status

Modulation

Channel ID

Frequency

Power

SNR

Correctables

Uncorrectables

1

Locked

QAM256

25

927000000 Hz

-13.6 dBmV

28.1 dB

410652

6851

2

Locked

QAM256

9

831000000 Hz

-9.8 dBmV

32.7 dB

0

3

Locked

QAM256

10

837000000 Hz

-11.8 dBmV

31 dB

14

0

4

Locked

QAM256

11

843000000 Hz

-11.3 dBmV

31.1 dB

14

0

5

Locked

QAM256

12

849000000 Hz

-12 dBmV

30.6 dB

55

0

6

Locked

QAM256

13

855000000 Hz

-12.3 dBmV

30.2 dB

244

0

7

Locked

QAM256

14

861000000 Hz

-10.3 dBmV

32 dB

0

8

Locked

QAM256

15

867000000 Hz

-10.6 dBmV

31.7 dB

0

9

Locked

QAM256

16

873000000 Hz

-11.1 dBmV

31.1 dB

5

0

10

Locked

QAM256

17

879000000 Hz

-10.9 dBmV

31.2 dB

0

11

Locked

QAM256

18

885000000 Hz

-10 dBmV

32 dB

0

12

Locked

QAM256

19

891000000 Hz

-10.3 dBmV

31.6 dB

0

13

Locked

QAM256

20

897000000 Hz

-10.3 dBmV

31.5 dB

4

0

14

Locked

QAM256

22

909000000 Hz

-11.3 dBmV

30.5 dB

2327

3452

15

Locked

QAM256

23

915000000 Hz

-11.4 dBmV

30.3 dB

4450

3021

16

Locked

QAM256

24

921000000 Hz

-12.2 dBmV

29.4 dB

4485

2134

17

Locked

QAM256

26

933000000 Hz

-15.7 dBmV

26.7 dB

1860

100

18

Not Locked

Unknown

27

939000000 Hz

0.0 dBmV

0.0 dB

0

19

Not Locked

Unknown

28

945000000 Hz

0.0 dBmV

0.0 dB

0

20

Not Locked

Unknown

29

951000000 Hz

0.0 dBmV

0.0 dB

0

&nbsp;

21

Not Locked

Unknown

30

957000000 Hz

0.0 dBmV

0.0 dB

0

22

Not Locked

Unknown

31

963000000 Hz

0.0 dBmV

0.0 dB

0

23

Not Locked

Unknown

32

969000000 Hz

0.0 dBmV

0.0 dB

0

24

Locked

QAM256

41

405000000 Hz

0.4 dBmV

40.3 dB

0

&nbsp;

Upstream Bonded Channels

Channel

Lock Status

US Channel Type

Channel ID

Symbol Rate

Frequency

Power

1

Locked

ATDMA

3

5120 Ksym/sec

30300000 Hz

41 dBmV

2

Locked

ATDMA

1

5120 Ksym/sec

17400000 Hz

41 dBmV

3

Locked

ATDMA

2

5120 Ksym/sec

23900000 Hz

41 dBmV

4

Locked

ATDMA

4

5120 Ksym/sec

36700000 Hz

41 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

&nbsp;

Current System Time:Sun Jan 31 08:43:52 2021

1970-1-1, 00:00:39

Critical (3)

SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:b9:8a:ad:f6:88;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;

1970-1-1, 00:00:42

Critical (3)

SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=b0:b9:8a:ad:f6:88;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;

1970-1-1, 00:01:03

Critical (3)

No UCDs Received - Timeout;;CM-MAC=b0:b9:8a:ad:f6:88;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;

1970-1-1, 00:01:11

Critical (3)

No Ranging Response received - T3 time-out;CM-MAC=b0:b9:8a:ad:f6:88;CMTS-MAC=00:a3:d1:5d:05:5c;CM-QOS=1.0;CM-VER=3.0;

2021-1-30, 22:05:35

Critical (3)

Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:b9:8a:ad:f6:88;CMTS-MAC=00:a3:d1:5d:05:5c;CM-QOS=1.1;CM-VER=3.0;

1970-1-1, 00:00:37

Critical (3)

SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:b9:8a:ad:f6:88;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;

2021-1-31, 08:09:28

Critical (3)

Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:b9:8a:ad:f6:88;CMTS-MAC=00:a3:d1:5d:05:5c;CM-QOS=1.1;CM-VER=3.0;

1970-1-1, 00:00:39

Critical (3)

SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:b9:8a:ad:f6:88;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;

1970-1-1, 00:00:41

Notice (6)

WiFi Interface [wl0] set to Channel 3 (Side-Band Channel:N/A) - Reason:INIT

1970-1-1, 00:00:41

Notice (6)

WiFi Interface [wl1] set to Channel 157 (Side-Band Channel:N/A) - Reason:INIT

1970-1-1, 00:01:41

Critical (3)

Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:b9:8a:ad:f6:88;CMTS-MAC=00:a3:d1:5d:05:5c;CM-QOS=1.0;CM-VER=3.0;

1970-1-1, 00:01:55

Notice (6)

Honoring MDD; IP provisioning mode = IPv4

1970-1-1, 00:01:57

Warning (5)

DHCP WARNING - Non-critical field invalid in response ;CM-MAC=b0:b9:8a:ad:f6:88;CMTS-MAC=00:a3:d1:5d:05:5c;CM-QOS=1.0;CM-VER=3.0;

2021-1-31, 08:32:02

Notice (6)

TLV-11 - unrecognized OID;CM-MAC=b0:b9:8a:ad:f6:88;CMTS-MAC=00:a3:d1:5d:05:5c;CM-QOS=1.1;CM-VER=3.0;

2021-1-31, 08:32:50

Critical (3)

Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:b9:8a:ad:f6:88;CMTS-MAC=00:a3:d1:5d:05:5c;CM-QOS=1.1;CM-VER=3.0;

bruce · Answer

Any new cell towers or antennae in your neighborhood?&nbsp; It seems your only Not Locked channels are contiguous from 939 to 969 MHz.
18, Not Locked, Unknown, 27, 939000000 Hz, 0.0 dBmV, 0.0 dB19, Not Locked, Unknown, 28, 945000000 Hz, 0.0 dBmV, 0.0 dB20, Not Locked, Unknown, 29, 951000000 Hz, 0.0 dBmV, 0.0 dB21, Not Locked, Unknown, 30, 957000000 Hz, 0.0 dBmV, 0.0 dB22, Not Locked, Unknown, 31, 963000000 Hz, 0.0 dBmV, 0.0 dB23, Not Locked, Unknown, 32, 969000000 Hz, 0.0 dBmV, 0.0 dB

phorvath · Answer

Nothing new in this area. No towers added. We had high mph winds for two days and a snowstorm. Line is new from the box to the modem. Pole to house is probably 7 or more years old. Have some really large rodents that frequent the line and the pole many times daily.&nbsp;

bruce · Answer

The channels seem kinda specific for scurrying rodents.&nbsp; Any recent electronic equipment purchased and located near any cabling?

phorvath · Answer

Nope. No changes at all. Everything has been as it is for close to five years. Nothing new bought or placed near either the line or the modem. Not in any of the rooms.

becky · Answer

Hi Phorvath, I think testing a new modem is the best next step. If a new device demonstrates the same behavior, then a service call would be in order. -Becky, Cox Support Forums Moderator

Forum Discussion

Downstream Channels will not bond. Very bad connection.

7 Replies

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