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Forum Discussion
CM1100 No Longer Compatible with Xfinity Due to Security Software
Xfinity sent out an email that my CM1100 modem is no longer compatible with the 800 Mbps plan even though the specs on the device exceeds that. Xfinity's initial reason was due to INCOMPATIBLE BASED...
Ok, power levels are with in spec:
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router
I see some Correctables however there not bad. Should be mostly zero so there is some minor line issue seems like.
Be sure your using a good quality LAN cable between the modem and router. CAT6 is recommended.
What is the brand and model of the host wifi router connected to the modem?
Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
Be sure there are no coax cable line splitters in the between the modem and ISP service box.
Be sure your using good quality RG6 coax cable up to the modem.
Start with removing any amplifiers, signal attenuators, or splitters from the coax.
From there check the line for kinks, damage, moisture in the line.
Check the connectors for improperly made ends, foil touching the copper coax line, loose connections, bad/old/cheap connectors, or corroded connections. Replace them if you do.
Be sure to power OFF the modem for 1 minute then back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Modems/m-p/1530376#M12853
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html
Unless the ISP is pushing to the 1.2Gb plan which the CM wouldn't fully support, 1Gb or lower speed tier should work with the CM modem. I know that XF seemed to have removed the 1Gb tier from some areas of service and are now pushing a 800Mpbs and 1.2Gb tiers. 800Mbps should be compatible and supported by the ISP unless they are not supporting any DOCSIS 3.1 modems which I highly doubt. There marketing dept I persume would be giving false information or pushing users to use higher speed teirs when they don't really need too.
Router TP-Link AX3200 Tri-Band
The link to provide insights to event log was helpful, but not sure I fully understand exactly what these are and what causes them:
- UCD invalid or channel unusable
- Started Unicast Maintenance Ranging - No Response received - T3 time-out
- Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time
Would these occur if Xfinity had disconnected temporarily out at the main box?
Most definitely. Most items seen in the event logs are on the modem side so ISP should know about all those and how to resolve them.