Some devices are not able to connect to the wifi.

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  • Updated 4 years ago
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We have AP121s and yesterday and today a few people were not able to connect there devices to the wifi. Our system is Comcast internet line going into the Aerohive switch to the APs, nothing else. The devices are iOS and Android. The odd thing is that many people are able to connect devices to the wifi. Not sure what is going on. I did reboot the system and it still occurs.
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Brian Lee

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Posted 4 years ago

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BJ, Champ

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Hi Brian, 
I recommend starting with Client Monitor...
http://blogs.aerohive.com/blog/the-wireless-lan-training-blog/troubleshooting-wi-fi-connectivity-wit...
When you say they cannot connect, are they not authenticating, or not receiving an ip address from you dhcp server, etc? Client monitor will give you a very detailed view to determine your issue(s). Some more info would be helpful. On another note, I would be wary of rebooting devices as a first line of defense as you might lose some valuable log info.

Best,
BJ 

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Nick Lowe, Official Rep

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My hunch would be DHCP scope exhaustion. Have you checked that your DHCP server is still able to lease addresses?
(Edited)
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Gregor Vucajnk, Official Rep

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Echoing BJ. Start with the Client Monitor. It will give you clues to where it brakes.

Gregor
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Brian Lee

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I did the Client Monitor and created a log.  I see in the log the 4 way handshake and it say Authentication is Successfully finished.  But the device still does not connect.  Not sure what to look for in the log.

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Crowdie, Champ

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When you say "the device still does not connect" is the device deauthenticating or is it connected to the wireless network but can't do anything?  If Client Monitor is saying that authentication has completed successfully can you see an IP address being assigned to the wireless client?  This should appear in Client Monitor after the authentication lines.
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Brian Lee

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The log does not show an IP address getting assigned. 
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Crowdie, Champ

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Is the wireless client's DHCP request handled by an access point's integrated DHCP server or an external DHCP server, such as a Windows server?

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Andrew MacTaggart, Champ

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Authentication with EAP is at layer 2, then IP addresses would be assigned after successful auth.
As Nick guessed - check your DHCP scope - make sure it is not depleted.
change the lease to shorter time if needed.

and also verify that the VLANs are  mapped correctly.

Cheers
A