I'm using ASA as a VPN concentrator on HQ site. I've used Public IP addresses on both interfaces,Inside and Outside interfaces. I've had 4 branch sites connecting to HQ using Site-to-Site VPN. How can I do load-sharing with those 2 interfaces on ASA? What I want to do is that 2 branch sites peer with the outside interface and the other 2 branch sites peer with the inside interface. Is this possible? If not,What's the best practice to do?