Wireless Controller 5520 connection issue

[riyadhit]

We have cisco 5520 wireless controller connect to 88 Aps, Suddenly in the morning some of the clients got connected and some of them get connected but says no internet.

connected clients are both 2.4 and 5GHZ clients.

Please advice

[marce1000]

 - Enable client debugging for the particular Mac's on the controller ; you can have the debugs analyzed with :

                       https://cway.cisco.com/tools/WirelessDebugAnalyzer/

 M.

[Sandeep Choudhary]

How is the WLAN configured ?

is any specific type of clients are having issue or ?

paste the output of these commands:

sh wlan <id>

debug client <mac address of the client>

Regards

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[Anjana A]

Hi,

whether the internet unable access is related to a specific wlan or all the wlan.

please check whether users got correct ip address and gateway ip address.

Please check whether users able to ping default gateway.

try pinging 8.8.8.8 from the core switch a source as user vlan/ also from wlc try pinging 8.8.8.8

Regards,

Anjana

[Scott Fella]

"No Internet" means that DNS is not working on those subnets.  Maybe check your NAT.... Just verify if the device gets authenticated and or get an ip address from the correct subnet.  That usually eliminates wireless issues and points to something upstream.

[Leo Laohoo]

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@riyadhit wrote:

Suddenly in the morning some of the clients got connected and some of them get connected but says no internet.

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"some of the clients" -- Are these clients getting valid IP addresses or not?