2.4 ghz devices no longer connecting to xb8 gateway

For the past 12-18 months, my home network has been working flawlessly. I have an Xfinity XB8 (CGM4981COM) gateway and an xfi pod to ensure full coverage across my wide house; the gateway is on one side and the pod on the other. A significant portion of my network consists of roughly 30 2.4 GHz smart devices (switches, plugs, and light bulbs), which are essential for my son's independence as a paraplegic.

However, over the last week, something has changed with the XB8 gateway. The 2.4 GHz devices that previously connected to it are no longer able to establish a connection. Interestingly, the 2.4 GHz devices on the other side of the house, connected to the xfi pod, are still working perfectly. All 5 GHz and 6 GHz devices continue to connect to the XB8 gateway without any problems. I'm aware that band splitting isn't an option because of the xfi pod setup.

I've already performed multiple reboots of the gateway. Do you have any insights into what might have changed with the XB8 gateway, or what I can do to resolve the connectivity issues for my 2.4 GHz devices?

Oh yeah, one more thing. I also noticed that the port forwarding settings on the XB8 gateway were deleted.

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user_323c89

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91 Messages

10 days ago

Open up the Xfinity app, tap on the WiFi tab at the bottom of the screen, then tap on the WiFi details tile in the middle of the screen, followed by tapping Edit WiFi settings at the bottom of the screen. Ensure that Security mode is set to WPA3-Personal-Transition.

I know that there have been recent updates to the XB8 and the Xfinity WiFi Extenders (xFi Pods), so hopefully a full restart of your system fixes the issues. Power cycle the XB8 by disconnecting power for at least 30 seconds, then reconnect. Then you’ll need to do the same for the WiFi Extender. It’ll take a few minutes for the XB8 to be fully online, and likely several minutes more for the WiFi Extender. Once the Xfinity app shows both as fully online, you’ll probably want to power cycle all of the devices having connection issues. If power cycling the devices doesn’t do it, you may need to completely reset them and start fresh. Hope that you get it figured out.

mike_s6

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6 Messages

Thanks for the response. I did confirm that it is set to WPA3-Personal-Transition. I also power cycled the XB8 and the pod as you suggested. I also power cycled a few of the devices that won't connect and unfortunately I am still running into the same situation. The devices that are near the pod do connect but the devices that usually connect to the XB8 gateway still do not connect. So unfortunately that did work.

You mentioned that there was a recent update to the XB8 gateway. Is there any documentation of what was updated? It looks like other people are running into the same problem so I am thinking that it is the update that is causing the issue.

https://forums.xfinity.com/conversations/your-home-network/wont-accept-network-password/687f9df83d8f4b32cdaffda4?commentId=6882605ef02a1b2d446527aa

10 days ago

user_xdn2xu

Visitor

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1 Message

@mike_s6 eager to find out if you found a fix for this. Sounds like yours went down around the same time mine did. I’m with you on an update being the cause. All 2.4 ghz devices. Some literally right next to eachother. One works, on doesn’t. Very high signal in most cases. I’ve done most of the trouble shooting you have.

3 days ago

user_323c89

Contributor

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91 Messages

@mike_s6 I haven’t seen any documentation, as there rarely ever is any, and I don’t have any specific details either. Apologies on that one.

Two possible experiments. First, have you factory reset a few of the easier to reset devices having issues, and started fresh? The other, if possible, could you temporarily relocate one of the working devices, to be within range of the XB8 instead of the Xfinity WiFi Extender (Pod) and see whether it works?

One other thought, which Gen WiFi Extender do you have, and is it connected back to the XB8 via Ethernet cable? Gen 1 has a single Ethernet port, and Gen 2 has two ports.

3 days ago

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mike_s6

2.4 ghz devices no longer connecting to xb8 gateway

user_323c89

mike_s6

user_xdn2xu

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