Design Help.... WLCs / HREAP?

Here is my scenario...
We have two offices and the each have a WLC 2112 and 1130ag APs.
SITE A (Main Office):
1 - WLC 2112
4 - 1130ag APs
IP: 192.168.0.x/24 (VLAN1)
IP: 192.168.100.x/24 (VLAN10)
VLAN10 is setup for the Guest wireless network using Web Auth and ACLs etc...
SITE B (Branch Office):
1 - WLC 2112
2 - 1130ag APs
IP: 192.168.1.x/24 (VLAN1)
SITE A connected to SITE B via Private T1
Each site also has their own internet...
Okay, so what I want to do is basically setup each controller to back the other one up in case of a failure at either end.
I tested HREAP and it worked great except SITE B clients receive an IP address that is on SITE A's network. They could surf the internet but it was going through SITE A's internet etc...
I can't have that and the clients need to use the internet based out of their location and be assigned an IP from their local network.
Is there a way to do this?
Each site obviously had the same SSID which is fine or they can be different. It doesn't matter... I just want to make sure if one of the WLCs go off the air, the other one picks up the APs and the clients do not notice a difference nor do they receive an IP from the site that would be remote to them.
Also I do not want each site to see the other's SSID if using different SSID's. I only want the SSID to be seen by clients at their respective site. They can use the same SSID and in fact i would like to do that, but not sure if that would work in this scenario.
If this is unclear, please let me know. i am trying to describe this as best as possible...
Thanks,
Ed

This is what you need to do. First of all, make sure the wlan ssid is set to local switching and that you use the same vlan on both sites. On the ap, I figured you already changed the ap from local to h-reap.... if not, then that is what you hvae to do. Then after the ap reboots and is back up, click on the ap and you will have a tab named h-reap. Click that and check the native vlan. Now the ap will be trunked so you need to make sure the ip of the ap is on a seperate vlan than the ssid's. The vlan the ap belongs to would be configured as native vlan on the trunk. On th eh-reap ap, set the vlan that will be the native vlan. exit out of that screen and go back to the h-reap tab. Now you will see the wlans that you specifed as local switching with a box in which you can specify the local vlan in which the user will get an ip address locally and will reside on. You will also see wlans that will not have the entry box, since you don't have local switching enabled. This means the traffic will tunnel back to the wlc it's joined with. This is why you fail one wlc and the ap goes to the other site... failover works, but users are getting address from the new site, which means you are not locally switched.
Example
Site A
Management/AP Manager vlan 100 (native) 192.168.100.x
H-REAP AP vlan 100 (native) 192.168.100.x
* AP can be on a different vlan if you want
Internal Users vlan 110 192.168.110.x
Guest Users vlan 120 192.168.120.x
Site B
Management/AP Manager vlan 100 (native) 192.168.200.x
H-REAP AP vlan 100 (native) 192.168.200.x
* AP can be on a different vlan if you want
Internal Users vlan 110 192.168.210.x
Guest Users vlan 120 192.168.220.x

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