Can an IPSec VPN back-up my MPLS network?

So you want to use an IPSec VPN to backup your MPLS network.  It can be done, with the right engineering. In the simplest terms: Use BGP between your network and your MPLS provider Run GRE tunnels between locations over the Internet VPN, with BGP routing across the tunnels. Set these tunnels to be a higher cost […]