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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?
I had to utilize the iPhone note, but the boxes and grid didn’t copy over. Additionally, it appears that Xfinity isn’t sending communication to my device, with crucial data missing. As a result, I’ve scheduled a tech appointment for this Wednesday.
Connection Status
IP Address 73.XXX.XXX.XXX
2001:558:6040:2:2xxx:xxxx:xxxx:xxxx
Subnet Mask 255.255.254.0
128
Default Gateway 73.xxx.xx.x
fexx::xxx:xxxx:xxxx:xxxx
DHCP Server 0.0.0.0
DNS Server 1.1.1.1, 1.0.0.1
2001:558:feed::1, 2001:558:feed::2
Lease Obtained 3 days, 7 hours, 36 minutes, 8 seconds
Lease Expires 2 days, 22 hours, 48 minutes, 48 seconds
Release Renew Close
Time Priority Description
2024-02-18 08:15:40 Notice (6) DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=c8:9e:43:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:38 Notice (6) Honoring MDD; IP provisioning mode = IPv6
1970-01-01 00:00:33 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;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:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:35 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;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:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2024-02-14 22:27:29 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
2024-02-14 22:27:23 Critical (3) SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=c8:9e:43:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:34 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=c8:9e:43:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;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:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;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:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2024-02-14 22:16:18 Critical (3) Resetting the cable modem due to docsDevResetNow
1970-01-01 00:00:33 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:28 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=c8:9e:43:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:33 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;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:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2024-02-14 17:01:00 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
2024-02-14 17:00:53 Critical (3) SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=c8:9e:43:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:02:39 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:02:15 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=c8:9e:43:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:27 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=c8:9e:43:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Connection Status
IP Address 73.XXX.XXX.XXX
2001:558:6040:2:2xxx:xxxx:xxxx:xxxx
Subnet Mask 255.255.254.0
128
Default Gateway 73.xxx.xx.x
fexx::xxx:xxxx:xxxx:xxxx
DHCP Server 0.0.0.0
DNS Server 1.1.1.1, 1.0.0.1
2001:558:feed::1, 2001:558:feed::2
Lease Obtained 3 days, 7 hours, 36 minutes, 8 seconds
Lease Expires 2 days, 22 hours, 48 minutes, 48 seconds
Release Renew Close
Time Priority Description
2024-02-18 08:15:40 Notice (6) DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=c8:9e:43:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:38 Notice (6) Honoring MDD; IP provisioning mode = IPv6
1970-01-01 00:00:33 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;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:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:35 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;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:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2024-02-14 22:27:29 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
2024-02-14 22:27:23 Critical (3) SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=c8:9e:43:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:34 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=c8:9e:43:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;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:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;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:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2024-02-14 22:16:18 Critical (3) Resetting the cable modem due to docsDevResetNow
1970-01-01 00:00:33 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:28 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=c8:9e:43:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:33 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;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:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2024-02-14 17:01:00 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
2024-02-14 17:00:53 Critical (3) SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=c8:9e:43:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:02:39 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=c8:9e:43:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:02:15 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=c8:9e:43:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
1970-01-01 00:00:27 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=c8:9e:43:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
The log does look bad. Tech visit is entirely appropriate.
Be sure and check your power supply cord, plugs, and etc. The CAX30 may need a firmware refresh for both sides.
- I googled some things earlier after looking at the log and contacted Xfinity yet again with more details about these issues and declined offers for their modem and basic diagnostics and finally on this 3rd support chat with them they told me that “ the boot file needs to be updated which the higher level team can only do“ xfinity rep… also said that they would be doing that within the next few hours so fingers crossed! So, yeah, a software error.