Constant Modem Timeouts Motorola MB8611

Can anyone help with this?

Had a tech out today who replaced connectors and installed a power leveler to the modem. It only made the issue worse. Now it cuts out every 5 minutes. I had to manually undo everything that he did just to get it to calm down a little bit so that it cuts out every 15 minutes to an hour instead of immediately.

Hi, @user_Es0824. Thank you for reaching out. I understand you keep seeing timeouts on your event logs that have been continuous for some time. I am certainly sorry to hear about the trouble, and I'll surely do everything I can to assist. I see we had a tech out already, but it seems to have gotten works. That is definitely not what we want to hear. 

I ask that you reach out privately, so we can cover the details of your account. You can start by clicking the chat icon located in the top right corner on your forums page when signed in. Once there, you can search for "Xfinity Support" to compose your direct message. Please add your full name and service address to help us locate your account. Let me know if you have any questions.

I have your answer. Replace your modem with something other than a Motorola.  Something about the MB8611 and whatever firmware Xfinity is pushing out causing connection issues. Mine got bricked by the final update they sent to it. FYI. Today's Motorola modems aren't made by Arris. That ended in 2015. Actually Motorola never made modems. They just license the name out. That's why they don't carry the Surfboard name anymore. 

Whelp, my internet just went out again after being up for 30 hours. Right after I cancelled my appointment via a call with the xfinity advanced support team that called me a few minutes ago. They are all very unhelpful and the english is terrible. Back to square one. 

I just wrote a very long post explaining things i found out, but i screwed up, in a nutshell i went to att help forum, Version plus others, they all they all voice the same concerns pretty verbatim of the issues experienced here, if it is happening on other isps and no one has a solution, i doubt its the isp, i would look and have looked elsewhere.., 

FWIW. If those other ISP's are DSL (copper) or fiber based (FiOS) then the issue can't have the same/common cause. Comcast is DOCSIS based. Apples-oranges.

I'm having very similar issue with my Xfinity internet and have the Motorola MB8611. I've had this modem since October 2021 and it's worked fairly well. As Xfinity has been upgrading speeds in my area, I started noticing occasional modem 'hiccups' - it was maybe once a week last year? But in the last 2 weeks it's gotten terrible. I counted 11 drops in the last 24 hours. When I go back to work after the holiday break, this will make working from home impossible. I will say my speeds have become amazing in the last couple of weeks. I ran a speed test just now and got 971Mpbs download which is crazy fast. I was getting maybe 600 Mpbs a couple months ago. Nothing in my setup has changed, but I'd say my very fast internet is now useless for working from home.

Well i have the mb8611, it worked flawlessly for months, i had some issues, same stuff, i booted in to Linux, completely vanished, Microsoft was completely out of the mix, so i went back to windows, changed some settings and it eradicated my problem...  a couple 10 second clicks fixed my issues, no one can find a solution....

I agree, i don't either, but to a certain extent it can be hardware related also, routers finding a better, quieter channel, may with a different SSid, shuffling devices to it, having to authenticate to the new SSid, but to just assume its a Comcast issue, we all see the progress that is being made..

Read this very carefully with a open mind, these very issues are brought up on the other isps forums, play close attention to the times and duration cited in the article, then make up your own mind,…

https://www.smallnetbuilder.com/wireless/wireless-features/wi-fi-ping-spikes-causes-and-fixes/ 

We will just have to agree to disagree on this one. Happy New Year !

Another interesting point I saw on the other forums, I thought was very good, so the tech said with advances in technology, you might serve yourself well to have the most recent drivers from the manufacturers website, Microsoft plug and play drivers do what there supposed to do, but I don’t see them advertised as ‘maximum performance or optimum performance’ probably for a reason, plus he said you should have the current build of your os, on the Microsoft website, you can refresh your os saving your data or a complete reinstall, free of course with a existing license, a while back before I read his comment, I installed win 11 on my 10 year old computer, I got the usual errors that my computer wasn’t capable with win 11, so I read the documentation on the website explaining how to bypass the warnings and install it anyways, so I did… 

I made sure my mesh router was up to date with latest firmware and keep my PC and Smartphone OS up to date. Based on these forum posts, I really though t I was on to something unique to the MB8611 firmware, but I just ran out and bought an Arris S33 DOCSIS3.1 modem and activated it and within 30 minutes the modem dropped connection, so no apparent change to the symptom. I seem to be on a rough schedule of a drop occurring after about an hour, then the next drop will be after ~20 minutes, then an hour again, then 20 minutes... it's not exact but that is the theme for the last few days. I'll try removing the wireless router/mesh network from the equation and see how that goes...

@DownLevel  Did you read the link I posted? It might explain a lot…