3.3. IGP-Anycast Segment (Anycast-SID)

An Anycast segment or Anycast-SID enforces the ECMP-aware shortest-path forwarding towards the closest node of the anycast set. This is useful to express macro-engineering policies or protection mechanisms.

An IGP-Anycast segment MUST NOT reference a particular node.

Within an anycast group, all routers in an SR domain MUST advertise the same prefix with the same SID value.