No WiFi on 2.4GHz, 5GHz just fine

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sundance2008

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I am having an intermittent issue with my Asus RT-AC88U router (purchased about 4 months ago). The issue started about a week ago and there have been no changes I have initiated to the router or my Windows 10 Pro PC.

I noticed it first on my phone when at home, it would connect to WiFi (2.4GHz) just fine but said under the connection that internet was not available. 5GHz and wired connections had internet just fine. Resetting (power cycling) the router did not fix it but sometimes it seemed to fix it's self. Last night I had no WiFi on 2.4 but this morning it's fine. My provider is Comcast but if it was Comcast I think the issue would be on 2.4 and 5.

I contacted Asus via their support chat and the tech. had me change some setting and I figured that fixed it till the problem showed up again a day and a half later.

Has anyone had a similar issue and if so found a fix? Is this a router hardware issue and I should contact Asus for a replacement?

Thanks for the help!!
 

Couriant

James
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Is the modem provided by Comcast?

On the windows pc, when it happens again, go to Command Prompt and type ipconfig/all and press enter to see if the IP information for the wireless is missing.
 

Couriant

James
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OK. I now realize that you have 2 devices, a modem and the router.

It's possible that the 2.4GHz may not work while 5GHz can work.

What is the IPv4 when it is not working? Is it 192.168.x.y or 10.x.y.z? or 169.254.x.y?
 

sundance2008

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If there were the case I think I would have had that issues from day one but it is not, only recently have I had this issue.
IPv4 is 192.168.x.x
 

Couriant

James
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OK, so it doesn't appear that you are losing the IP information...

Since you said it's happening on more than one device... and to confirm, on the PC it shows you are connected to the 2.4GHz connection but no internet..

Try this: when it goes down, type in Command Prompt the following information:

ping google.com
ping 172.217.4.174
ping 192.168.0.1
(this is your default gateway IP from the ipconfig. If this number is different, then change accordingly)

If the first two ping commands fail (show timed out or destination unreachable) but the third one works, then the issue is with the router. Since you didn't mention doing this, a factory reset on the router may help. If there is a firmware update, that is newer than your one, that may also help.

If it doesn't, you should be in your warranty period for getting it exchanged at the store or at least with ASUS.
 
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