6 Messages
wifi doesn't have a valid IP configuration
Starting about a week ago multiple devices in our house starting failing to access the internet, intermittently. Signal strength is good and, when I can check, data speeds are great. But various computers (Windows 7, Windows 10, Windows 11) [Edited: "Language"]. And then work at other times.
We've now gone through 3 modems and no real change.
In doing some further investigation, it seems that, in all of these cases, the ipv6 sites work, and it is the ipv4 sites that fail.
Looking at the wifi adapter properties, I see "No internet access" for ipv4, with ipv6 working as expected.
Further, I have an extender taking in one of these problematic signals, However, if I connect to the output signal from this extender, things work, and I have ipv4 access. It seems that the extender is reconditioning the problematic signal from the Xfinity gateway.
This happens on both 2.4GHz and 5GHz.
I hit the Diagnose and I see a message:
"'Wi-Fi' doesn't have a valid IP configuration."
I've changed nothing to cause this, but think it may be related to some recent Xfinity change. Any ideas on what's going on/what can be done?
(And getting my owe Gateway is certainly an option, but I want to give Xfinity the chance to fix this since it seems unlikely to be my issue across multiple devices."
XfinityBrianH
Official Employee
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1.5K Messages
2 years ago
Thank you for reaching out to us here to let us know you are experiencing an issue with your internet service, I can help! Can 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 of your forums page when signed in. Once there, you can direct your messages to "Xfinity Support." Please add your full name and service address to help us locate your account. Let me know if you have any questions.
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EG
Expert
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112.4K Messages
2 years ago
@brp_95070 @XfinityBrianH
Please circle back here and post any possible solutions for the issue here in these open forums so that all readers here may benefit from the exchange / info. This is in keeping with the spirit for which these public help forums were originally intended. Thank you.
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brp_95070
6 Messages
2 years ago
@EG
We have been working a fair bit on this and trying things with no resolution so far. If we do get something that resolves this issue, I will certainly circle back and post details here. Right now, all we have are more questions :)
Cheers.
(edited)
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EG
Expert
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112.4K Messages
2 years ago
OK thank you ! 😊 Good luck with it !
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brp_95070
6 Messages
2 years ago
Coming back with some updates. Still not fixed. We looked at signal. it seems fine (and the non-Xfiniy signals are fine anyway).
The modem portion of the Gateway seems OK since the WiFi from the attached router is fine. And the signal extended directly from the failing Xfinity 2.4GHz signal is also fine. Just the native Xfinity signals don't work.
One suggestion came from a prior thread (https://forums.xfinity.com/conversations/your-home-network/not-assigning-ipv4-address/624d05e9b776c838c9d0e61e) to change the 2.4GHz from g,n to b,g,n. However I'm not able to make these changes as they're managed by Xfinity..who also can't seem to change them. Not sure if tehre's a way to get more access to the admin settings. (@EG , seems you were involved in that discussion as well...)
I'd almost be happy enough to use the Xfintiy Gateway as a simple modem and use my own router, but not at 15 bucks a month :)
(edited)
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brp_95070
6 Messages
2 years ago
I have some further developments here and sending out for thoughts as this seems very odd:
I just wanted to update you folks with new information. I ended up getting a new modem. This was set up and running. Within a short period of time, after setting up my Wifi 2.4g and 5G settings, this exhibited the same issues. Needless to say, I was not happy!
After some experimentation, I have it working and wanted to run a thought past the experts. I have changed the WiFi password to exclude some particular special characters (> and =).
I have found some discussion that some special characters are not accepted by some IoT devices. Could this impac the modem in the way described here?
(edited)
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brp_95070
6 Messages
2 years ago
Still performing experiments. I used the external router, with the updated password to remove the ">=" part, for more than a day with no issue. I've switched back to the Xfinity modem with the same change and will see if that maintains stability.
My wife suggested that, perhaps, the ">=" was interpreted somewhere along the way as a redirect and may have fouled the config. Certainly speculative, but any thoughts?
Cheers.
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