Source Packet Routing in Networking (SPRING) or Segment Routing

Support for Layer 3 services over segment routing infrastructure (ACX710 routers)—Starting in Junos OS Release 21.2R1, ACX710 routers support the following features:

• IPv4 OSPF segment routing enabled through MPLS.
• IS-IS segment routing enabled through MPLS.
• Segment routing–traffic engineering (SR-TE).
• Segment routing global block (SRGB) range label, which is used by Source Packet Routing in Networking (SPRING).
• Anycast segment identifiers (SIDs) and prefix SIDs in SPRING.
• Topology-independent loop-free alternate (TI-LFA) with segment routing, which enables fast rerouting.
• MPLS label stack fast reroute (FRR) backup paths corresponding to the post-convergence path for a given failure.

[See Understanding Source Packet Routing in Networking (SPRING), Understanding Adjacency Segments, Anycast Segments, and Configurable SRGB in SPRING for IS-IS Protocol, and Understanding Topology-Independent Loop-Free Alternate with Segment Routing for IS-IS.]