Hello hhubert

                         What are the common reasons modems will go offline and require a hard reboot to bring back online?

                 If there is any issue with the Service provider end or network outage modem will go offline

                 If the modem signal level is not in accepted range modem will go offline intermittently

                 If the speed is not compatible with the modem and Internet service provider so it will also cause the modem to go offline

                 Can you download the logs off the Arris Modems via remotely?

                 You can get the Log details by logging into the modem interface but not remotely, that is not possible.

                  if no what is the console setting for these and the cable connection requirements?

                You can check on the modem interface 192.168.100.1 for console settings.

Let us know if this helps

Arris,

We were able to pull this information from the modems. based on this information below. is there anything based on what the logs are stating below that indicates a problem why these go offline?

Also what is this meaning regarding this log entry “DHCP RENEW WARNING - Field invalid in response v4 option;”

LOG 
Sun Jun 04 19:42:53 2023    3    No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
Sun Jun 04 19:43:08 2023    5    RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
Sun Jun 04 19:43:10 2023    3    No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
Sun Jun 04 19:43:22 2023    3    Ranging Request Retries exhausted;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
Sun Jun 04 19:43:22 2023    3    Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
Sun Jun 04 19:43:22 2023    3    Ranging Request Retries exhausted;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
Sun Jun 04 19:43:22 2023    3    Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
Sun Jun 04 19:43:23 2023    3    No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
Sun Jun 04 19:43:29 2023    3    Ranging Request Retries exhausted;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
Sun Jun 04 19:43:29 2023    3    Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
Sun Jun 04 19:43:29 2023    3    No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
Sun Jun 04 19:43:58 2023    5    RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
Sun Jun 04 19:44:29 2023    3    Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
Mon Jun 05 01:47:25 2023    4    DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
Mon Jun 05 01:59:40 2023    5    RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
Mon Jun 05 07:47:25 2023    4    DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
Mon Jun 05 12:54:31 2023    5    Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
Mon Jun 05 13:47:24 2023    4    DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

Hello hhubert

If you are facing intermittent connection , checking cable signal levels is the best option to understand if the modem is working fine but in regard to the event log details do contact ISP (Internet Service Provider ) for the same .