Forum Discussion

mr-b's avatar
mr-b
Tuning in
3 months ago

Intermittent packet drops & high latency with Post RS Errors

Hi

I'm a relatively new customer and everything was fine to start with, but recently I've noticed iplayer and YouTube video pausing at times throughout the day.

BQM shows the story:

10th Sep

 

1st Oct

2nd Oct

 

3rd Oct

Hub 3.0 is in modem mode:

 

01/10/2025 17:42:46

critical

No Ranging Response received - T3 time-out;CM-MAC=18b;CMTS-MAC=00:;CM-QOS=1.1;CM-VER=3.0;

01/10/2025 11:26:29

Warning!

Lost MDD Timeout;CM-MAC=18b;CMTS-M9:c6:5f;CM-QOS=1.1;CM-VER=3.0;

01/10/2025 11:26:23

Warning!

RCS Partial Service;CM-MAC=18b;CMTS-MAC=00:5f;CM-QOS=1.1;CM-VER=3.0;

01/10/2025 11:26:23

critical

SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=7:8b;CMTS-MAC=00CM-QOS=1.1;CM-VER=3.0;

01/10/2025 11:26:22

Warning!

RCS Partial Service;CM-MAC=18b;CMTS-MAC=00:5f;CM-QOS=1.1;CM-VER=3.0;

01/10/2025 11:26:22

critical

SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=18:f7:8b;CMTS-M5f;CM-QOS=1.1;CM-VER=3.0;

30/09/2025 13:24:55

Error

DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=18:38b;CMTS-MAC=05f;CM-QOS=1.1;CM-VER=3.0;

27/09/2025 22:18:56

critical

No Ranging Response received - T3 time-out;CM-MAC=1b;CMTS-MAC=00f;CM-QOS=1.1;CM-VER=3.0;

Any ideas?

 

 

[MOD - MAC addresses removed]

4 Replies

  • John_GS's avatar
    John_GS
    Icon for Forum Team rankForum Team
    3 months ago

    Hi mr-b 

    Thanks for posting and welcome to the community. Sorry for any service issues.

    The Hub is currently in Modem Mode. Can you pop it into Router Mode for us so we can run full checks.

    Best wishes.

  • mr-b's avatar
    mr-b
    Tuning in
    3 months ago

    Tx for the reply John. Will changing it to router mode disrupt traffic?

    • Tudor's avatar
      Tudor
      Very Insightful Person
      3 months ago

      It is only for VM to access the hub and see and confirm the stats that you have provided. The stats are awful and unless there is an area fault you will need a technician’s visit. 

  • mr-b's avatar
    mr-b
    Tuning in
    3 months ago

    Tx, sorry for the delay as I didn't get any email reply notification. However that doesn't answer my question.

    My modem is connected to my Pfsense firewall and I recall it was trouble to get it passing traffic, so I am loath to change the config without some assurance that it won't disrupt internet access.

    Also when you say the stats are 'awful', please can you clarify?