SB8200v3 regularly loses Xfinity connection

Perhaps the device needs a firmware upgrade - ISP has to push this.

I also lose connectivity at random times and found that a daily power-cycle keeps things running. I use a smart plug that schedules a reboot: Power off at 3:54am daily, and power back on at 3:55am.

There’s also a device called Keep Connect that performs a connectivity check and can power-cycle if there’s no connectivity. I have not tried this one.

Thanks for the information.

Power cycling the modem every day may help, but I hope for a better way :-)

Unfortunately, if power cycling is the only thing that works, there is no better way.

Could you please confirm your subscribed internet speed plan?

If the cable signal levels are within the acceptable range as outlined in the article below, we recommend reprovisioning the modem with your internet service provider.

https://arris.my.salesforce-sites.com/consumers/articles/knowledge/SB8200-Cable-Signal-Levels

It’s important to isolate the issue to determine whether the connection loss is occurring through the router or the modem. To check this, we recommend connecting a computer directly to the modem using an Ethernet cable and monitoring if the connection drops when connected directly to the modem.

In fact, some signals were out of range. After close to 2 hours on chat and call with XFinity, they decided to send a technician. Who never showed up.

I remembered a few years ago XFinity brought other coax cables. I switched cables. Signals look better. I’ll wait a couple of weeks before thinking the issue might be resolved.