Next-hop-based dynamic MPLS-over-UDP tunnels

A dynamic UDP tunnel supports the creation of a tunnel composite next hop for every UDP tunnel configured. This is called a next-hop-based dynamic UDP tunnel or MPLS-over-UDP tunnel. The tunnel composite next hops are enabled by default for the MPLS-over-UDP tunnels, and include the dynamic tunnel's source and destination IP address, encapsulation data, and a VPN label (when chained composite next hop is not enabled). At a given point in time, for the same tunnel destination, the next-hop-based dynamic tunnel encapsulation can either be generic routing encapsulation (GRE) or UDP. The next-hop-based MPLS-over-UDP tunnels provide a scaling advantage for the number of dynamic UDP tunnels created on a device. It benefits data center deployments that require mesh IP connectivity from one provider edge (PE) device to all other PE devices in the network.