Static FTI backup paths with IP-in-IP tunnel encapsulation and provisioning APIs

Junos OS enhanced Juniper Extension Toolkit (JET) APIs to enable a controller to implement underlay network backup paths that use IP-in-IP tunnels with IPv4 encapsulation on flexible tunnel interfaces (FTIs). Use this feature to engineer effective, loop-free backup paths for core transport networks built with only IP protocols for fast restoration after failures. Devices extended FTIs and existing forwarding constructs to support configuring static IPv4 IP-in-IP tunnels. You can also allow policy matches for routes injected by JET APIs.