what is interface override???

I have lag enabled on wlc

Configure it like this

Create AP-Groups in the WLC for each of the building

Create dynamic interfaces for each building

Under WLAN>Ap-Groups, add each AP in each building, in the respective AP-Groups

Map the WLAN to the AP-groups to the interface for each building ( you can see an option, Add interface mapping in the document you sent)

Thanks

NikhiL

what about the vlan,

i need to configure vlan 4000 and 4001

first buldng aps will be in vlan 4000 and second bldng will be in 4001

right now i have only 4001 enabled

Create VLAN 4000 also and configure the AP port in VLAN 4000. If you want the client to get ip address in vlan 4000, create a dynamic interface in the WLC in vlan 4000 and map it to the WLAN

Thanks

NikhiL

This is a very useful Link on VLAN's:

http://www.cisco.com/en/US/tech/tk722/tk809/technologies_configuration_example09186a00805e7a24.shtml