We have 4 sites. All on MPLS with BGP routing.
Site A has the primary Internet connection. BGP is configured with default-originate to pass the default route to the other MPLS sites.
Site B has a new Cable Internet installed to another ISP as backup. We want to re-configure BGP so if the primary location circuit drops or if the Internet at the primary location drops, Site B will become the backup and Internet will continue out the backup path. Site B's Internet has a ASA in place on the DSL line.
Then once Site A comes back online or the Internet there is restored, Site B's default route reverts back to Site A and the rest of the sites follow suit..
Any configuration examples available? Your assistance is much appreciated!