RFC 8662 PDF | Entropy Label for Source Packet Routing in Networking (SPRING) Tunnels

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Segment Routing (SR) leverages the source-routing paradigm. A node steers a packet through an ordered list of instructions, called segments. Segment Routing can be applied to the Multiprotocol Label Switching (MPLS) data plane. Entropy labels (ELs) are used in MPLS to improve loadbalancing. This document examines and describes how ELs are to be applied to Segment Routing MPLS.