IP Re-route Based on BFD/ARP

IP Re-route Based on BFD/ARP

* Two methods for failure detection:

? BFD (Bidirectional Failure Detection)

? ARP (Address Resolution Protocol)

* IP re-route can be triggered in case of failure detection

Benefits
- Fast failure detection of gateway or peer entity
- Trigger IP re-route, reducing packet loss and call drop
- Improve system reliability