bschmiduk's profile

Contributor

 • 

22 Messages

Friday, June 20th, 2025 1:01 PM

Modem re-provision after ROUTER change?

I own my equipment - Netgear Nighthawk CM3000 modem. Used to have an ASUS AX88 router.

I swapped the router for an ASUS BE88, and that somehow tripped the MODEM to require re-provisioning. I'm trying to understand why. The only think I can think is that the old router only had a 1G connection to the modem, and the new router has a 10G connection - maybe this required some change to the modem configuration.

All working well after the usual 40 minute "please provision my modem" telephone chat. I'm just trying to understand what happened.

Expert

 • 

111.5K Messages

15 days ago

Concern moved here to the Customer Service help section for greater exposure to Comcast corporate employees (The Digital Care Team) for assistance.

Gold Problem Solver

 • 

26.5K Messages

15 days ago

... I swapped the router for an ASUS BE88, and that somehow tripped the MODEM to require re-provisioning ...

Re-provisioning was probably not necessary. Whenever you change the device directly connected to a straight cable modem like the CM3000, you also need to reboot or reset the modem.

All cable modems store the MAC address of the device they are connected to when they boot up. When the device changes typically the MAC address changes too, and the modem won't talk to the new device until it boots up again and stores the new address. No doubt when the modem was re-provisioned it was also rebooted, which was really all that was required.

Please be aware that there are 2 kinds of responses in this Forum: Replies and Comments. When you Comment on a post by scrolling down to "Comment on this post here...", I am notified of your response. But if you select Reply, I am NOT notified and may not be aware of your response.

Official Employee

 • 

1.6K Messages

15 days ago

Hey @bschmiduk Thank you for visiting our official Xfinity Forums Community support page. We greatly appreciate you taking the time to share your experience regarding the router change. Information provided by the community member @BruceW is helpful into what could have happened. Are your services currently working correctly?

Contributor

 • 

22 Messages

14 days ago

Huh.  I guess initially:

  • Powered down old router and disconnected
  • Connected new router and powered up (to configure SSID, passwords, etc)
  • Tried to get internet, and was greeted with the COMCAST "walled garden". Then
  • Power cycled both devices

I guess once you hit the walled garden, it must have stuck me in some kind of error state.

Thanks - I was just curious as a geek hobbyist. Working fine now.

Official Employee

 • 

1.8K Messages

So it sounds like you had just taken one off and added another onto the coax line, which would cause that initial stuck registration state. If the modem is added to the Xfinity App first, then this upends that whole process. 

 

Activate an Xfinity Gateway or third-party modem with the Xfinity app

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

Contributor

 • 

22 Messages

14 days ago

We're talking across one another here (or maybe I garbled the terminology).

The modem (Netgear Nighthawk CM 3000) was fine, and never moved. Stayed connected to the coax. It was in my account and fully activated/functioning.

I replaced the router (swapped out an ASUS AX88u or and ASUS BE88U), which somehow prompted the modem to want provisioning again - just showed the XFINITY  "walled garden". Even after power cycling both router and modem.

Everything is fine now (after the usual telephone help 40 minute process to get the modem re-provisioned), but I'm still puzzled how changing the ROUTER could force the MODEM to want re-provisioned.

--- Bill

Official Employee

 • 

1.6K Messages

Great to hear everything is working correctly now. It sounds like something got lost in translation per se when the new router was connected that cause it to go walled garden. Please do let us know if you need anything further. 

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
forum icon

New to the Community?

Start Here