I need to build a project with VRF-Lite and Backup ISDN. In my lab, VRF-Lite is perfect, but now, I need to configure a backup of Dedicated Link through ISDN Link, Dialer Interface.
So I would like to get an help to build this project. What does best way to configure a Backup link with VRF-LITE? and the routing table needs to keep separated, if possible.
Topology is attached.