Eric,
The WLC's can act as a dhcp server, but if you have redundant anchors, you need to split the dhcp scopes between the two. In this case it almost makes sense to have a dhcp server in the dmz for this. This way you don't have a split scope, but it's not required. As long as the anchor wlc have an interface on the subnet the guest will be on, this will work. If you have the anchors in two different data centers and the guest subnet is different. Then each anchor will have a different dhcp scope.
Makes sense?
Sent from Cisco Technical Support iPhone App
-Scott
*** Please rate helpful posts ***