I have multiple WLAN's setup on a WiSM blade with different security settings for each. There is one guest WLAN and it is having problems with DHCP. Users can connect and associate to the WLAN but are not getting DHCP address'. If I manually assign and address to a PC then it works fine.
Are you supplying DHCP through the controller or from another subnet? If from another subnet, then you will need "ip helper" addresse(s) on the VLAN interface. If from the controller, point the WLAN Profile DHCP address to the controller's management interface.
The problem appears to be with the mobility group function. The DHCP address' are being given out by the firewall going to the internet. The guest ssid users at the anchor WiSM are functioning fine, but those at remote WiSM's are not. We are going to reboot the WiSM tonight to see if that fixes it.
It was working fine before and I verified all the settings for the Mobility group and everything is correct, just not working.