What are SR policies?

SR policies

An SR policy serves as instructions to route packets through the network on a specified path. These instructions are embedded at the headend. The other nodes remain stateless. The headend of an SR policy binds a segment identifier (called a Binding SID - or BSID) to its policy. When the headend receives a packet whose active segment matches the BSID of a local SR policy, it steers the packet into the associated SR policy. This can be used to reduce the maximum stack depth (MSD) of an SR-TE LSP. NSP distributes SR policies to nodes using BGP exclusively.

Note: MSD discovery is supported from BGP-LS for nodes not using PCEP.

Note: When distributing SR policies, NSP does not receive feedback from routers.

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