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Forum Discussion
Solved
Network Speed
Why has my network speed suddenly dropped from 900 Mbps to a constant 100 Mbps on my Netgear router? Seeking advice on troubleshooting steps or potential settings adjustments to restore optimal speed ...
What is the deal with the "said that the switch panel was defective on my unit" Is this regarding LAN ports on the CAX30 or the game console?
Error messages started appearing again in the event log and the ps5 never got over 435 Mbps, but the Xfinity tech will be here today and Netgear is also reviewing the logs. Xfinity is coming based off of possible issues that I found on this link yesterday not paying attention to who actually was making the recommendations lol
https://community.netgear.com/t5/Cable-Modems-Gateways/CAX30-Timing-Synchronization-failure-Loss-of-Sync/m-p/2175277
Fingers crossed that, as Xfinity loves to say, “they will find a permanent solution for this issue” Right.
https://community.netgear.com/t5/Cable-Modems-Gateways/CAX30-Timing-Synchronization-failure-Loss-of-Sync/m-p/2175277
Fingers crossed that, as Xfinity loves to say, “they will find a permanent solution for this issue” Right.
Following the Xfinity technician’s visit, my Netgear CAX30 experienced further speed drops without issue identification. However, upon resetting, speeds improved. Subsequent testing revealed that enabling “guest wifi” halved speeds for my PS5 on port 3; disabling it restored the original speeds.
Cable Connection
Cancel Apply
Cable Diagnostic
Status: Good
Action: Your setup looks fine. If you are still experience an internet issue, the Netgear Cable Knowledge Base can provide additional troubleshooting info.
Internet Access:
Downstream Status:
Upstream Status:
Refresh Save Cable Diagnostic Info
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 417000000 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 Uncorrectabables
1 Locked 256 QAM 4 417000000 Hz 3.2 dBmV 39.2 dB 0 0
2 Locked 256 QAM 5 423000000 Hz 3.3 dBmV 39.1 dB 0 0
3 Locked 256 QAM 6 429000000 Hz 3.6 dBmV 39.2 dB 0 0
4 Locked 256 QAM 7 435000000 Hz 3.5 dBmV 39.1 dB 0 0
5 Locked 256 QAM 8 441000000 Hz 3.2 dBmV 38.9 dB 0 0
6 Locked 256 QAM 9 447000000 Hz 3.3 dBmV 38.9 dB 0 0
7 Locked 256 QAM 10 453000000 Hz 3.4 dBmV 38.9 dB 0 0
8 Locked 256 QAM 11 459000000 Hz 3.5 dBmV 39.0 dB 0 0
9 Locked 256 QAM 12 465000000 Hz 3.7 dBmV 39.0 dB 0 0
10 Locked 256 QAM 13 471000000 Hz 3.6 dBmV 38.9 dB 0 0
11 Locked 256 QAM 14 477000000 Hz 3.6 dBmV 38.9 dB 0 0
12 Locked 256 QAM 15 483000000 Hz 3.7 dBmV 38.9 dB 0 0
13 Locked 256 QAM 16 489000000 Hz 3.7 dBmV 38.9 dB 0 0
14 Locked 256 QAM 17 495000000 Hz 3.8 dBmV 38.9 dB 0 0
15 Locked 256 QAM 18 507000000 Hz 3.9 dBmV 38.9 dB 0 0
16 Locked 256 QAM 19 513000000 Hz 4.0 dBmV 38.8 dB 0 0
17 Locked 256 QAM 20 519000000 Hz 4.2 dBmV 38.9 dB 0 0
18 Locked 256 QAM 21 525000000 Hz 4.1 dBmV 38.9 dB 0 0
19 Locked 256 QAM 22 531000000 Hz 4.3 dBmV 38.9 dB 0 0
20 Locked 256 QAM 23 537000000 Hz 4.5 dBmV 38.9 dB 0 0
21 Locked 256 QAM 24 543000000 Hz 4.3 dBmV 38.8 dB 0 0
22 Locked 256 QAM 25 549000000 Hz 4.7 dBmV 38.9 dB 0 0
23 Locked 256 QAM 26 555000000 Hz 4.5 dBmV 38.8 dB 0 0
24 Locked 256 QAM 27 561000000 Hz 4.8 dBmV 38.8 dB 0 0
25 Locked 256 QAM 28 567000000 Hz 4.8 dBmV 38.8 dB 0 0
26 Locked 256 QAM 29 573000000 Hz 4.8 dBmV 38.8 dB 0 0
27 Locked 256 QAM 30 579000000 Hz 4.9 dBmV 38.8 dB 0 0
28 Locked 256 QAM 31 585000000 Hz 4.9 dBmV 38.7 dB 0 0
29 Locked 256 QAM 32 591000000 Hz 4.8 dBmV 38.6 dB 0 0
30 Locked 256 QAM 33 597000000 Hz 5.0 dBmV 38.6 dB 0 0
31 Locked 256 QAM 34 603000000 Hz 4.8 dBmV 38.5 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 1 5120 Ksym/sec 10400000 Hz 44.8 dBmV
2 Locked ATDMA 2 5120 Ksym/sec 16400000 Hz 45.8 dBmV
3 Locked ATDMA 3 5120 Ksym/sec 22800000 Hz 46.5 dBmV
4 Locked ATDMA 4 5120 Ksym/sec 29200000 Hz 46.3 dBmV
5 Locked ATDMA 5 5120 Ksym/sec 35600000 Hz 46.8 dBmV
6 Locked ATDMA 6 5120 Ksym/sec 40400000 Hz 49.3 dBmV
7 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0 dBmV
8 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0 dBmV
Downstream OFDM Channels
Channel Channel ID Frequency Power SNR/MER Active Subcarrier Number Range Total Codewords Uncorrectable Codewords
1 48 722000000 Hz 4.8 dBmV 36.1 dB 1108 ~ 2987 316011222 0
2 0 0 Hz 0 dBmV 0 dB 0 ~ 0 0 0
Upstream OFDMA Channels
Channel UpstreamIsMuted Ranging Status Subcarrier Zero Frequency Active Subcarrier Number Range Symbols Per Frame Tx Power
1 Other 0 MHz 0 ~ 0 0 0 dBmV
2 Other 0 MHz 0 ~ 0 0 0 dBmV
Extended Upstream Transmit Power
Current System Time: 2024-02-22 14:10:11
System Up Time: 1Days, 01:20:58
Event Log
Time Priority Description
2024-02-21 21:01:02 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=c8:9e:43:6f:0a:00;CMTS-MAC=00:01:5c:6f:82:59;CM-QOS=1.1;CM-VER=3.1;
2024-02-21 12:50:31 Notice (6) DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=c8:9e:43:6f:0a:00;CMTS-MAC=00:01:5c:6f:82:59;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:32 Notice (6) Honoring MDD; IP provisioning mode = IPv6
1970-01-01 00:00:29 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:6f:0a:00;CMTS-MAC=00:01:5c:6f:82:59;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:24 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=c8:9e:43:6f:0a:00;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:29 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:6f:0a:00;CMTS-MAC=00:01:5c:6f:82:59;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:24 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=c8:9e:43:6f:0a:00;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2024-02-21 12:25:08 Critical (3) SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=c8:9e:43:6f:0a:00;CMTS-MAC=00:01:5c:6f:82:59;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:30 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:6f:0a:00;CMTS-MAC=00:01:5c:6f:82:59;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:24 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=c8:9e:43:6f:0a:00;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:02:27 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:6f:0a:00;CMTS-MAC=00:01:5c:6f:82:59;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:29 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=c8:9e:43:6f:0a:00;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Cable Connection
Cancel Apply
Cable Diagnostic
Status: Good
Action: Your setup looks fine. If you are still experience an internet issue, the Netgear Cable Knowledge Base can provide additional troubleshooting info.
Internet Access:
Downstream Status:
Upstream Status:
Refresh Save Cable Diagnostic Info
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 417000000 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 Uncorrectabables
1 Locked 256 QAM 4 417000000 Hz 3.2 dBmV 39.2 dB 0 0
2 Locked 256 QAM 5 423000000 Hz 3.3 dBmV 39.1 dB 0 0
3 Locked 256 QAM 6 429000000 Hz 3.6 dBmV 39.2 dB 0 0
4 Locked 256 QAM 7 435000000 Hz 3.5 dBmV 39.1 dB 0 0
5 Locked 256 QAM 8 441000000 Hz 3.2 dBmV 38.9 dB 0 0
6 Locked 256 QAM 9 447000000 Hz 3.3 dBmV 38.9 dB 0 0
7 Locked 256 QAM 10 453000000 Hz 3.4 dBmV 38.9 dB 0 0
8 Locked 256 QAM 11 459000000 Hz 3.5 dBmV 39.0 dB 0 0
9 Locked 256 QAM 12 465000000 Hz 3.7 dBmV 39.0 dB 0 0
10 Locked 256 QAM 13 471000000 Hz 3.6 dBmV 38.9 dB 0 0
11 Locked 256 QAM 14 477000000 Hz 3.6 dBmV 38.9 dB 0 0
12 Locked 256 QAM 15 483000000 Hz 3.7 dBmV 38.9 dB 0 0
13 Locked 256 QAM 16 489000000 Hz 3.7 dBmV 38.9 dB 0 0
14 Locked 256 QAM 17 495000000 Hz 3.8 dBmV 38.9 dB 0 0
15 Locked 256 QAM 18 507000000 Hz 3.9 dBmV 38.9 dB 0 0
16 Locked 256 QAM 19 513000000 Hz 4.0 dBmV 38.8 dB 0 0
17 Locked 256 QAM 20 519000000 Hz 4.2 dBmV 38.9 dB 0 0
18 Locked 256 QAM 21 525000000 Hz 4.1 dBmV 38.9 dB 0 0
19 Locked 256 QAM 22 531000000 Hz 4.3 dBmV 38.9 dB 0 0
20 Locked 256 QAM 23 537000000 Hz 4.5 dBmV 38.9 dB 0 0
21 Locked 256 QAM 24 543000000 Hz 4.3 dBmV 38.8 dB 0 0
22 Locked 256 QAM 25 549000000 Hz 4.7 dBmV 38.9 dB 0 0
23 Locked 256 QAM 26 555000000 Hz 4.5 dBmV 38.8 dB 0 0
24 Locked 256 QAM 27 561000000 Hz 4.8 dBmV 38.8 dB 0 0
25 Locked 256 QAM 28 567000000 Hz 4.8 dBmV 38.8 dB 0 0
26 Locked 256 QAM 29 573000000 Hz 4.8 dBmV 38.8 dB 0 0
27 Locked 256 QAM 30 579000000 Hz 4.9 dBmV 38.8 dB 0 0
28 Locked 256 QAM 31 585000000 Hz 4.9 dBmV 38.7 dB 0 0
29 Locked 256 QAM 32 591000000 Hz 4.8 dBmV 38.6 dB 0 0
30 Locked 256 QAM 33 597000000 Hz 5.0 dBmV 38.6 dB 0 0
31 Locked 256 QAM 34 603000000 Hz 4.8 dBmV 38.5 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 1 5120 Ksym/sec 10400000 Hz 44.8 dBmV
2 Locked ATDMA 2 5120 Ksym/sec 16400000 Hz 45.8 dBmV
3 Locked ATDMA 3 5120 Ksym/sec 22800000 Hz 46.5 dBmV
4 Locked ATDMA 4 5120 Ksym/sec 29200000 Hz 46.3 dBmV
5 Locked ATDMA 5 5120 Ksym/sec 35600000 Hz 46.8 dBmV
6 Locked ATDMA 6 5120 Ksym/sec 40400000 Hz 49.3 dBmV
7 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0 dBmV
8 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0 dBmV
Downstream OFDM Channels
Channel Channel ID Frequency Power SNR/MER Active Subcarrier Number Range Total Codewords Uncorrectable Codewords
1 48 722000000 Hz 4.8 dBmV 36.1 dB 1108 ~ 2987 316011222 0
2 0 0 Hz 0 dBmV 0 dB 0 ~ 0 0 0
Upstream OFDMA Channels
Channel UpstreamIsMuted Ranging Status Subcarrier Zero Frequency Active Subcarrier Number Range Symbols Per Frame Tx Power
1 Other 0 MHz 0 ~ 0 0 0 dBmV
2 Other 0 MHz 0 ~ 0 0 0 dBmV
Extended Upstream Transmit Power
Current System Time: 2024-02-22 14:10:11
System Up Time: 1Days, 01:20:58
Event Log
Time Priority Description
2024-02-21 21:01:02 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=c8:9e:43:6f:0a:00;CMTS-MAC=00:01:5c:6f:82:59;CM-QOS=1.1;CM-VER=3.1;
2024-02-21 12:50:31 Notice (6) DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=c8:9e:43:6f:0a:00;CMTS-MAC=00:01:5c:6f:82:59;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:32 Notice (6) Honoring MDD; IP provisioning mode = IPv6
1970-01-01 00:00:29 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:6f:0a:00;CMTS-MAC=00:01:5c:6f:82:59;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:24 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=c8:9e:43:6f:0a:00;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:29 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:6f:0a:00;CMTS-MAC=00:01:5c:6f:82:59;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:24 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=c8:9e:43:6f:0a:00;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2024-02-21 12:25:08 Critical (3) SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=c8:9e:43:6f:0a:00;CMTS-MAC=00:01:5c:6f:82:59;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:30 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:6f:0a:00;CMTS-MAC=00:01:5c:6f:82:59;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:24 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=c8:9e:43:6f:0a:00;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:02:27 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:6f:0a:00;CMTS-MAC=00:01:5c:6f:82:59;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:29 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=c8:9e:43:6f:0a:00;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;