…tes them according to the tunnel protocol, and transmits them into the tunnel [ RFC2983 ]. An ingress is the tunnel equivalent of the outgoing (departing) network interface of a link, and its encapsulation processing is the tunnel equivalent of encoding a message for transmission…

…ECN code points [ RFC6040 ]. o Usage of the IP DSCP field by tunnel endpoints [ RFC2983 ]. o Encapsulation considerations in the design of tunnels [ ENCAP ]. o Usage of ICMP messages [ INT-TUNNELS ]. o Handling of fragmentation and packet size for tunnels [ INT-TUNNELS ]. o Sourc…