Unicast Reverse Path Forwarding (uRPF) can help limit malicious IPv4/IPv6 traffic on a network. uRPF works by enabling the router to verify reachability (routing) of the source IP address (SIP) in the packet being forwarded. If the SIP is determined to be an invalid address, the packet is dropped.

QinQ L3 subinterfaces divide a single ethernet or port channel interface into multiple logical L3 interfaces based

Nexthop groups is an existing feature which allows users to manually configure a set of tunnels with nexthops.