I have a network consisting of a main site hosting shared resources and half a dozen of remote sites all connecting to the main site. Each remote site has one primary connection via VSAT and VPN backup connexion via local provider to the main site.
The Vsat connection terminate on an Ethernet switch but most of the backup VPN connection terminate on serial interface.
I need your input on HOW TO IMPLEMENT HIGH AVAILABILITY WITH THE SERIAL INTERFACES USING A PAIR OF EDGE ROUTER AT EACH SITE. Doing that with Ethernet connection is straighforward, I am wondering how it can be done on the serial connections.
Thanks for helping