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Beginner

End clients receiving wrong DHCP subnet leases

Hi Team,

I have been experiencing a DHCP lease problem where a number of users who connect to an SSID receive an invalid subnet lease (or wrong DHCP allocation), whilst other users can connect to the same SSID and receive a valid IP address assignment.

All of my APs are in FlexConnect mode and the problem is not AP specific (this occurs across all the APs).

The Cisco Wireless LAN Controller (WLC) and all the APs are on software version is 8.3.143.0

The WLC is configured with a static IP address of 0.0.0.0 to discover and find the external Windows DHCP server.

 

Any help would be greatly appreciated.

 

Regards,
Nathan.

3 REPLIES 3
Rising star

Re: End clients receiving wrong DHCP subnet leases

 

 - Check the DHCP server's logs for the particular mac-addresses from the clients getting a 'wrong ip' ; check wether the dhcp scopes are correctly configured (e.g.).

M.

VIP Advocate

Re: End clients receiving wrong DHCP subnet leases

Are you using WPA2-Enterprise (Radius based) authentication?
If yes, maybe you have configured different VLANs in the radius server profiles.
Enthusiast

Re: End clients receiving wrong DHCP subnet leases

I suggest you to check, interfac mapping for each SSID and try changing DHCP server IP to specific server which release IPs.

Also, in interfaces check for the correct DHCP server and VLAN with connectivity to server from wlc.
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