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klynchk
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8 hours ago

[Hub 5] Recurring T3 Timeouts causing intermittent connection drops - Log attached

I am experiencing intermittent connection drops multiple times a week. I have extracted the router log from my Hub 5 and can see consistent critical T3 timeout errors.

This suggests a fault with the signal levels or connection stability to the CMTS.

Can the VM team please investigate the line quality for T3 timeout issues?

Device Details:

  • Equipment: Virgin Media Hub 5
  • Cable MAC: 9C:24:72:XX:XX:XX (The full, non-anonymised version is best for staff).

Log Snippet showing T3 Errors:

2025-11-05 02:04:13,critical,Cable Modem Reboot because of - unknown 2025-11-04 07:33:10,critical,Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=9c:24:72:XX:XX:XX;CMTS-MAC=18:59:f5:25:f4:ec;CM-QOS=1.1;CM-VER=3.1; 2025-10-29 18:49:49,critical,Started Unicast Maintenance Ranging - No Respo

Full log with anonymised MAC address

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