getting critical messages on hub 5 log

[johnb007]

08-04-2024 09:32:22

critical

SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;

[Sephiroth]

Without the fully network log we can’t see the message contexts and so cannot advise.  We need to see what’s on either side of that message, top to bottom.  Also your power levels would add useful context.

[johnb007]

more log info

Time Priority Description

09-04-2024 21:30:47	notice	GUI Login Status - Login Success from LAN interface
08-04-2024 22:13:42	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
08-04-2024 11:42:24	notice	GUI Login Status - Login Success from LAN interface
08-04-2024 11:31:02	notice	REGISTRATION COMPLETE - Waiting for Operational status
08-04-2024 11:30:58	notice	US profile assignment change. US Chan ID: 13; Previous Profile: 13; New Profile: 11 13.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
08-04-2024 11:30:52	notice	DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
08-04-2024 11:30:44	warning	DHCP WARNING - Non-critical field invalid in response ;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
08-04-2024 11:30:42	notice	Honoring MDD; IP provisioning mode = IPv4
08-04-2024 11:30:09	critical	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
08-04-2024 11:30:08	critical	Cable Modem Reboot because of - HW or Power-On Reset
08-04-2024 10:32:22	critical	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
08-04-2024 10:32:22	critical	Cable Modem Reboot because of - Reboot UI

[Sephiroth]

The network log as provided shows nothing of concern.  I'll explain.

At 08-04-2024 @ 10:32:22  you rebooted by command from the hub UI.  The SYNC Timing event would only matter if it happened a lot in normal operation; however when booting, until everything is synchronised, the hub is receiving gibberish.  And so on reading up the Network Log.

The T3 event near the top of the log happens all the time to everyone, and is only criticaif you get 16x on the trot after which the hub does a soft reset.

Hope that explains.

[johnb007]

ok thank you.  Another question, my upload / download speeds are fine, but 1. I have a number of "weak" wifi signals as reported in the router test, and 2. Upload/download speeds are fine but there seems to be a lag in the initial connection and often doesn't connect to a website unless I go back and click again.  I suspect this is a DNS issue and wonder if I can use a 3rd party DNS server like 8.8.8.8.

[johnb007]

This is the results of the router test:

Your home network has a few problems.

Checking Broadband Service

Checking Ethernet Connections

Checking WiFi Connections

If you still think something is wrong, please check the following:

1

The temperature of your Hub 5 is normal.

2

Your broadband connection is working.

3

Gateway IPv4 address is valid.

4

Your broadband connection is ready.

5

There is no telephone service.

6

There may be devices in your wired network which might be limiting your in-home connectivity.

7

The device has low signal strength, please move it closer to Hub 5.

8

The device has low signal strength, please move it closer to Hub 5.

9

The device has low signal strength, please move it closer to Hub 5.

10

The device has low signal strength, please move it closer to Hub 5.

11

The device has low signal strength, please move it closer to Hub 5.

12

The device has low signal strength, please move it closer to Hub 5.

13

The device has low signal strength, please move it closer to Hub 5.

14

Please place your WiFi device near the Hub 5.

[Sephiroth]

VM don't want you to use another DNS because they can harvest what they see.  I'm in modem mode, with my own router and there I can set my DNS to 8.8.8.8.

On the wireless question, DNS and WiFi have no relationship with each other.  You may find the thread pasted below helpful.

https://community.virginmedia.com/t5/Networking-and-WiFi/UNDERSTANDING-KEY-ASPECTS-OF-WiFi/td-p/3870...

[Sephiroth]

Perhaps you can tell us more about your WiFi issue, having read the thread linked in my previous post.  The Connect App isn't very useful, imo.