Hi all ,

i have two WLC ,the first one is internal wlc and the second is Guest WlC connected to DMZ switch with NAC Guest and firewall

The wireless Guest network had some issue, the end user cannot reach to login page but he got IP address and the controller record this entry in the database, I checked the following :

mobility anchor connection

data tunnel

control tunnel

the connection between internal WlC and Guest WLC 

the Guest Scope
the Guest data base in internal and Guest controllers
the security parameter (web auth.)

time setting between NAC ,Guest WLC and Internal WLC
Radius server between NAC guest and WLC Guest
restart web server(NAC Guest)

restart WLC

I couldn't found any issue . the client told me the wireless guest workingfine, suddenly yesterday morning stop working !!!

please advice