I have a router 2811 with internet line of 2 Mbps in my head office and PIX 515e firewall bettwen the LAN and this router.
In another branch of my company, i have router 2811 with internet line of 1 Mbps and ASA 5510 firewall bettwen the LAN and this router.
Also, i have a dedicated MPLS line with 6 Mbps connect head office with the branch(between the two routers)
Finally i want to make a site to site VPN between the head office and the branch through the internet, so, how to be done and where on router or firewall.
Thanks a lot for your cooperation.