Constantly dropping internet and slow upload speed (modem: MB8611)

I have an issue where my internet keeps dropping out. It seems to be random through out the day and I've been dealing with this for couple months now. Some days it seems to be worse than other days.

Along with this issue, I get very slow upload speeds where it drops below 1 Mbps. This too seems to be random.

I've changed router and some cables. The issue persists....

As I was typing out this explanation my internet dropped out...I have a work from home job and this is becoming a big problem.

My internet plan is "Up to 400 Mbps".

Any assistance will be much appreciated!

Please let me know if any information is needed from myside.

Update:

I just scrolled down in the forum under "Your Home Network" and noticed an interesting post called "mb8611 firmware". I too have this modem and they seem to be experiencing the same issue.

Responses

U

user_073b7b

Visitor

•

6 Messages

2 years ago

So, according to the other forum it looks like there is an issue with the firmware.

Someone in that post did a warranty exchange on their modem mb8611 and the issue still came back, after the firmware was updated by Comcast.

I've already purchased a new modem ARRIS SURFboard SB8200 DOCSIS 3.1.

Ill post an update on how this modem functions.

9

0

Hey there! Thank you kindly for taking the time to post here on our Forums! I hate to hear your experiencing issues with your service. Looks like you have replaced your modem and now just waiting to see results. Please keep us posted! We are here for you 24/7!

I no longer work for Comcast.

2 years ago

0

CCChe

Official Employee

•

6.9K Messages

Hi @user_073b7b. How are things going on your end?

I no longer work for Comcast.

2 years ago

0

U

user_073b7b

Visitor

•

6 Messages

New modem arrived. Recently activated. I will post another update in about 1 week.

2 years ago

0

XfinityVianney

Official Employee

•

2.2K Messages

Got it, thank you for letting us know @user_073b7b I'll set a reminder to check in with you as well in case we don't hear back next week. We want to make sure everything is performing as expected before we let you go. We appreciate your time, help, and cooperation.

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Please, mark a reply as the Accepted Answer. tick

2 years ago

0

U

user_073b7b

Visitor

•

6 Messages

Thank you for your response and concern with this issue.

So far, no disconnection since yesterday. If a few more days go by like this, that's a very good sign.

I will update again in a few more days.

2 years ago

0

U

user_073b7b

Visitor

•

6 Messages

2 years ago

Update:

No drops since the modem change. Zero!

I'm going to call this resolved.

This is not a fix for MB8611 but, I hope this helps.

Hopefully no bad firmware in the future for the new modem....

(edited)

1

0

CCErika

Problem Solver

•

339 Messages

This is amazing to hear. I thank you for taking the time to reach out to us and providing these helpful updates for our community to see. At this time, is there anything else we can help with?

I no longer work for Comcast.

2 years ago

0

Your Home Network

user_073b7b

Constantly dropping internet and slow upload speed (modem: MB8611)

user_073b7b

CCErika

CCChe

user_073b7b

XfinityVianney

user_073b7b

user_073b7b

CCErika

New to the Community?