IPv6 Segment Routing

Segment routing is a form of source routing in which a node that originates a packet (the headend node), adds an ordered list of segments (or instructions) to that packet. Such an ordered list is called a segment routing (SR) policy. These segments tell the routers along the path how that packet should be forwarded. Only the headend node to a segment routing domain maintains per flow state. There is no per flow state inside the network.

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