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C6220 configuration with Xfinity 400Mb
C6220 v1.2.11 I recently upgraded my Xfinity service to 400Mb but can never see a speed test over 250. My network interface is configured for 1000Mb, i have CAT6 cable. Is there anything on the mode...
Please post a copy and paste of the modems connection status page.
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.
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