So, I have the 1 Gig speed internet service, and the Motorola MB8600. I've had both since around September of 2017 and had no issues. For the past 3 weeks I've had random dropouts of my internet (both wired and wifi) on a daily basis.
The modem event log shows the following:
And the connection settings show the following:
The signal levels and SNRs you posted look OK, but the error counts are on the high side and the multiple "Dynamic Range Window violation" and "Commanded Power in Excess" messages in the error log suggest an intermittent connection with Comcast's network.
If you want to troubleshoot this yourself, please see Troubleshooting Gigabit Internet Speeds and Connection Troubleshooting Tips. Loss of Internet service is often due to a poor connection between your equipment and Comcast's network, usually in or near your home.
If you can't find the problem or you'd rather have Comcast do the troubleshooting, call them at the phone number on your bill or 1-800-Comcast, or chat with them using the Internet Support option at https://support.xfinity.com/chat. If they can't fix the problem remotely, insist they send a tech out to identify the cause and correct it.
If the tech finds bad coax, splitters, amplifiers, or connections in your home (even if Comcast originally supplied them) you'll probably have to pay for the visit unless you have their Service Protection Plan (https://www.xfinity.com/support/articles/service-protection-plan, closed to customers that don't already have it). If the trouble is due to a faulty Comcast rental device, or anything outside your home, you shouldn't be charged.
Greetings Gary_H1! I appreciate you taking the time to reach out to us here on the forums. I hope you are having an amazing day. I apologize to hear you are having issues with your internet service. Certainly is frustrating when the connection seems to be unreliable at times. If what BruceW provided hasn't yielded any results, I can certainly take a deeper dive into the signal and neighborhood node and see if there is anything going on there. Feel free to send me a PM with your first and last name so I may further assist you.
To send a private message, please click my name "ComcastMichael" then select "Send a Message" on the right side.
Hello, Gary_H1. I have not heard back from you and hope your issue has been resolved. If you still need assistance, please feel free to start a new thread.