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Forum Discussion
Solved
Nighthawk CM2050V Comcast Firmware Killed Speed
I understand Comcast has just updated the firmware in these routers from V2.01.03 to V9.01.01. My download speed went from 934 to 225. Comcast tech came out yesterday and cleared some signal loss b...
I contacted a supervisor who actually responded he could see the modem was not properly provisioned, he opened another ticket and one of their best techs came out. I think they fixed it from inside but he was excellent. Problem solved after a month and about 15 tickets opened. Thanks for the encouragement
Please post a copy and paste of the modems connection status and event log page.
https://kb.netgear.com/30007/How-do-I-obtain-the-cable-connection-information-from-a-NETGEAR-cable-modem-modem-router
https://kb.netgear.com/30008/How-do-I-view-or-clear-the-event-logs-on-my-NETGEAR-cable-modem-or-modem-router
Has a power off for 1 minute then back ON with the ISP modem and router been performed since last update?
Be sure to restart your network in this sequence:
Turn off and unplug modem.
Turn off router and computers.
Plug in and turn on modem. Wait 2 minutes for it to connect.
Turn on the router and wait 2 minutes for it to connect.
Turn on computers and rest of network.
Be sure your using a good quality LAN cable between the modem and router. CAT6 is recommended.
What is the brand and model of the host wifi router connected to the modem?
CM series modems are not routers. Just only modems.
| Time | Priority | Description |
| Tue Sep 26 05:38:37 2023 | (Notice (6)) | CM-STATUS message sent. Event Type Code: 24; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Tue Sep 26 05:33:20 2023 | (Notice (6)) | CM-STATUS message sent. Event Type Code: 16; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Tue Sep 26 00:28:32 2023 | (Critical (3)) | No Ranging Response received - T3 time-out;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Tue Sep 26 00:28:24 2023 | (Notice (6)) | DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Tue Sep 26 00:28:23 2023 | (Notice (6)) | TLV-11 - unrecognized OID;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Tue Sep 26 00:28:14 2023 | (Notice (6)) | Honoring MDD; IP provisioning mode = IPv6 |
| Tue Sep 26 00:28:06 2023 | (Critical (3)) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; |
| Tue Sep 26 00:24:56 2023 | (Warning (5)) | ToD request sent - No Response received;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Tue Sep 26 00:24:55 2023 | (Critical (3)) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Tue Sep 26 00:24:54 2023 | (Critical (3)) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Tue Sep 26 00:24:54 2023 | (Critical (3)) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Tue Sep 26 00:24:53 2023 | (Critical (3)) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Tue Sep 26 00:24:06 2023 | (Warning (5)) | MDD message timeout;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Tue Sep 26 00:24:06 2023 | (Critical (3)) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Tue Sep 26 00:24:00 2023 | (Warning (5)) | MDD message timeout;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Tue Sep 26 00:24:00 2023 | (Critical (3)) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Mon Sep 25 23:31:45 2023 | (Notice (6)) | CM-STATUS message sent. Event Type Code: 24; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Mon Sep 25 23:26:06 2023 | (Notice (6)) | CM-STATUS message sent. Event Type Code: 16; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Mon Sep 25 23:19:33 2023 | (Notice (6)) | CM-STATUS message sent. Event Type Code: 24; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Mon Sep 25 22:36:04 2023 | (Notice (6)) | CM-STATUS message sent. Event Type Code: 16; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Mon Sep 25 22:27:00 2023 | (Notice (6)) | CM-STATUS message sent. Event Type Code: 24; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Mon Sep 25 20:50:10 2023 | (Notice (6)) | CM-STATUS message sent. Event Type Code: 16; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Mon Sep 25 15:26:40 2023 | (Notice (6)) | CM-STATUS message sent. Event Type Code: 24; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Mon Sep 25 15:19:33 2023 | (Notice (6)) | CM-STATUS message sent. Event Type Code: 16; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Mon Sep 25 14:40:36 2023 | (Notice (6)) | DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Mon Sep 25 14:40:30 2023 | (Notice (6)) | TLV-11 - unrecognized OID;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Time Not Established | (Notice (6)) | Honoring MDD; IP provisioning mode = IPv6 |
| Time Not Established | (Critical (3)) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; |
| Mon Sep 25 13:51:38 2023 | (Notice (6)) | CM-STATUS message sent. Event Type Code: 24; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Mon Sep 25 13:12:40 2023 | (Notice (6)) | CM-STATUS message sent. Event Type Code: 16; Chan ID: 193; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Mon Sep 25 13:05:08 2023 | (Notice (6)) | DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Mon Sep 25 13:05:02 2023 | (Notice (6)) | TLV-11 - unrecognized OID;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Time Not Established | (Notice (6)) | Honoring MDD; IP provisioning mode = IPv6 |
| Time Not Established | (Critical (3)) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; |
| Mon Sep 25 13:01:14 2023 | (Notice (6)) | DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Mon Sep 25 13:01:13 2023 | (Notice (6)) | TLV-11 - unrecognized OID;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Mon Sep 25 13:01:05 2023 | (Notice (6)) | Honoring MDD; IP provisioning mode = IPv6 |
| Mon Sep 25 13:00:58 2023 | (Critical (3)) | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; |
| Mon Sep 25 12:58:41 2023 | (Warning (5)) | ToD request sent - No Response received;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
| Mon Sep 25 12:58:39 2023 | (Critical (3)) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=08:36:c9:b5:15:40;CMTS-MAC=00:90:f0:67:04:00;CM-QOS=1.1;CM-VER=3.1; |
Please post the cable connections status data page as well.
Any Criticals, Errors or Warnings seen in the event logs needs to be reviewed and resolved by the ISP. Indicates a signal issue on the ISP line up to the modem.
Please post a copy and paste of the modems connection status page.
https://kb.netgear.com/30007/How-do-I-obtain-the-cable-connection-information-from-a-NETGEAR-cable-modem-modem-routerCable Connection
Cancel Apply
Cable Diagnostic
Status: Good
Action:
Your setup looks fine. If you can't access the internet, make sure you properly activated the modem. If modem has been activated and you still can't access the internet, contact your service provider for troubleshooting help.
If you can access the internet but has other internet issue, the Netgear Cable Knowledge Base can provide additional troubleshooting info.CM Status:
Downstream Status:
Upstream Status:
Refresh Save Cable Diagnostic Info
Advanced Information
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
573000000 Hz
Locked
Connectivity State
OK
Operational
Boot State
OK
Operational
Security
Enabled
BPI+
IP Provisioning Mode
Honor MDD
IPv6 only
Downstream Bonded Channels
Channel
Lock Status
Modulation
Channel ID
Frequency
Power
SNR
Correctables
Uncorrectables
1
Locked
QAM256
28
573000000 Hz
-4.1 dBmV
40.5 dB
0
0
2
Locked
QAM256
1
405000000 Hz
2.9 dBmV
43.7 dB
0
0
3
Locked
QAM256
2
411000000 Hz
2.8 dBmV
43.3 dB
0
0
4
Locked
QAM256
3
417000000 Hz
3.0 dBmV
43.7 dB
0
0
5
Locked
QAM256
4
423000000 Hz
2.8 dBmV
43.7 dB
0
0
6
Locked
QAM256
5
429000000 Hz
2.9 dBmV
43.7 dB
0
0
7
Locked
QAM256
6
435000000 Hz
2.9 dBmV
43.8 dB
0
0
8
Locked
QAM256
7
441000000 Hz
2.6 dBmV
43.6 dB
0
0
9
Locked
QAM256
8
447000000 Hz
2.8 dBmV
43.7 dB
0
0
10
Locked
QAM256
9
453000000 Hz
2.6 dBmV
43.7 dB
0
0
11
Locked
QAM256
10
459000000 Hz
2.3 dBmV
43.6 dB
0
0
12
Locked
QAM256
11
465000000 Hz
2.3 dBmV
43.5 dB
0
0
13
Locked
QAM256
12
471000000 Hz
2.0 dBmV
43.4 dB
0
0
14
Locked
QAM256
13
477000000 Hz
1.7 dBmV
43.3 dB
0
0
15
Locked
QAM256
14
483000000 Hz
1.6 dBmV
43.3 dB
0
0
16
Locked
QAM256
15
489000000 Hz
1.5 dBmV
43.2 dB
0
0
17
Locked
QAM256
16
495000000 Hz
1.4 dBmV
43.1 dB
0
0
18
Locked
QAM256
17
507000000 Hz
1.0 dBmV
43.2 dB
0
0
19
Locked
QAM256
18
513000000 Hz
0.6 dBmV
43.1 dB
0
0
20
Locked
QAM256
19
519000000 Hz
0.4 dBmV
43.0 dB
0
0
21
Locked
QAM256
20
525000000 Hz
-0.1 dBmV
42.9 dB
0
0
22
Locked
QAM256
21
531000000 Hz
-0.6 dBmV
42.6 dB
0
0
23
Locked
QAM256
22
537000000 Hz
-1.1 dBmV
42.4 dB
0
0
24
Locked
QAM256
23
543000000 Hz
-1.9 dBmV
41.9 dB
0
0
25
Locked
QAM256
24
549000000 Hz
-2.3 dBmV
41.7 dB
0
0
26
Locked
QAM256
25
555000000 Hz
-2.6 dBmV
41.5 dB
0
0
27
Locked
QAM256
26
561000000 Hz
-3.5 dBmV
40.9 dB
0
0
28
Locked
QAM256
27
567000000 Hz
-3.6 dBmV
40.8 dB
0
0
29
Locked
QAM256
29
579000000 Hz
-4.7 dBmV
40.2 dB
0
0
30
Locked
QAM256
30
585000000 Hz
-4.8 dBmV
40.0 dB
0
0
31
Locked
QAM256
31
591000000 Hz
-5.1 dBmV
39.7 dB
0
0
32
Locked
QAM256
32
597000000 Hz
-5.5 dBmV
39.4 dB
0
0
Upstream Bonded Channels
Channel
Lock Status
US Channel Type
Channel ID
Symbol Rate
Frequency
Power
1
Locked
ATDMA
19
5120 Ksym/sec
29200000 Hz
40.3 dBmV
2
Locked
ATDMA
18
5120 Ksym/sec
22800000 Hz
39.3 dBmV
3
Locked
ATDMA
17
5120 Ksym/sec
16400000 Hz
38.8 dBmV
4
Locked
ATDMA
20
5120 Ksym/sec
35600000 Hz
41.0 dBmV
5
Locked
ATDMA
21
2560 Ksym/sec
40400000 Hz
40.0 dBmV
6
Locked
ATDMA
22
2560 Ksym/sec
10400000 Hz
38.3 dBmV
7
Not Locked
Unknown
0
0
0
0.0 dBmV
8
Not Locked
Unknown
0
0
0
0.0 dBmV
Downstream OFDM Channels
Channel
Lock Status
Profile ID
Channel ID
Frequency
Power
SNR / MER
Active Subcarrier
Number RangeUnerrored
CodewordsCorrectable
CodewordsUncorrectable
Codewords1
Locked
0 ,1 ,2 ,3
193
688000000 Hz
-7.02 dBmV
34.7 dB
1108 ~ 2987
45058777
43893332
864171
2
Not Locked
0
0
0 Hz
0 dBmV
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
Current System Time:Mon Sep 25 14:35:40 2023
System Up Time:01:31:18
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