When creating a site to site VPN on the FMC for FTD devices, is it possible to create a backup VPN for another site? for example if site A normally has a VPN to site B but should site B be unavailable can site C be configured as a backup? This doesn't seem to be possible from the config, but is it just necessary to just create another VPN from site A to site C? But then how would you prevent site A and C forming a tunnel under normal circumstances?
Thanks!
