Segment Routing (SR) is a source routing protocol that simplifies network operation and enhances scalability. It operates by encoding a path as a sequence of segments, each representing a specific instruction or topological element within the network. The source node dictates the entire path by inserting a list of segment identifiers (SIDs) into the packet header. SR is commonly used to steer traffic through a network along a specific path, bypassing intermediate routing decisions. It improves network utilization, reduces network state, and facilitates traffic engineering.
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