Public internet router (x.x.x.x) goes to firewall public facing hosts static nated through firewall on dmz interface.
Connected to Site B with WAN link separate router.
Public internet router (y.y.y.y) goes to firewall. Site only used for outbound internet access. Connected to Site A with WAN Link separate router.
Can I do the following.
Connect Site A public router to Site A WAN router. Connect Site B public router to Site B WAN router. "Tunnel" BGP rerouted x.x.x.x traffic from Site B to the Site A public router.
This is in the event that Site A loses internet and x.x.x.x network fails over to site B. Assuming Site A is perfect other than internet I would like to know if this is doable. The idea is that I need the traffic to show up clean on Site A outside firewall interface just as if it originated from the Site A public router. It of course would have to use the tunnel on the way back as well for ther return traffic or outbound traffic originating from Site A. Thanks a bunch.