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Forum Discussion
Comcast C7100V hanging/crashing
Yesterday morning I discovered my C7100V cable modem router was hung: no lights flashing, all connections failing with "no connection possible to that service." Rebooted and discovered that this si...
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.
Be sure to power OFF the modem for 1 minute them back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Modems/m-p/1530376#M12853
What channels are you using? Auto? Try setting manual channel 1, 6 or 11 on 2.4Ghz and any unused channel on 5Ghz.
Any Wifi Neighbors near by? If so, how many?
As this installation contains both a CATV DVR and a Cable Internet Router, there is of necessity exactly one Coax splitter. All wiring is high quality unspliced RG-6/U, and as I said Comcast reports good signal levels up/down when the unit is working.
Both 2.4 GHz and 5 GHz radios are on fixed channel assignments. The key elements associated with failure are at least one Guest AP enabled (i.e. on 2.4 GHz) and/or an active login to the "NETGEAR Web-based Gateway Configuration Utility" a.k.a. web admin console, via Ethernet or WiFi.