Head office with one Router (2851) connected to the LAN and several site-to-site VPN on the outside Ethernet to the branche offices.
I need to improve a kind of High-Availability ONLY on the head office.
I added a second Routers (2811) connected with HSRP to the LAN.
I tryed to implement HSRP also on the outside, but the VPNs dont go UP to the "virtual" IP of the HSRP.
What is the best way?
- double VPN, one to each Router - but how to decide priority?
- gre tunnel?