Hi zailon0,
Yeah, it is odd, but I am not the only one who had this problem, the following post talks about the same, but it finishes with no clear solution
http://community.arubanetworks.com/t5/forums/v3_1/forumtopicpage/board-id/IAP/thread-id/9217/page/5
What I want to do is the cluster Instant offers DHCP addresses to clients and then source NATs this addresses. I tried with the first option (VC managed - Default) which seems easier, but because it didn't work, I tried with the second one (VC managed - Custom).
Yes, both APs are in the same cluster and I didn't try if clients obtain IP adresses if AP2 holds the VC, but I think they will. And for the last question, yes, 192.168.1.0/24 is configured in a FW acting as DHCP server in the same subnet where APs are connected.
Regards,
Julian