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Source Packet Routing in Networking (SPRING) or Segment Routing

  • Support for application-specific link attribute in OSPFv2 for segment routing traffic engineering (PTX10001-36MR, PTX10003, PTX10004, PTX10008, and PTX10016)—Starting in Junos OS Evolved Release 22.2R1, you can advertise different te-attributes such as te-metric, delay-metric, or admin-groups for RSVP and flexible algorithms on the same link. This is done using flexible algorithm specific application-specific link attribute as defined in RFC 8920.

    To configure flexible algorithm application-specific te-attribute, include the application-specific statement at the [edit protocols ospf area interface] hierarchy level and the strict-asla-based-flex-algorithm statement at the [edit protocols ospf source-packet-routing] hierarchy level.

    [See Understanding OSPF Flexible Algorithm for Segment Routing.]

  • BGP Classful Transport (CT) support for IPv6 and Segment Routing Traffic-Engineered (SR-TE) color-only support (PTX10001-36MR, PTX10003, and PTX10008)— Starting in Junos OS Evolved Release 22.2R1, we support BGP-CT with IPv6 and BGP service-routes with a color-only mapping community. We have also enhanced the transport-class configuration statement to provide strict resolution without falling back on best-effort tunnels.

    [See use-transport-class, BGP Classful Transport (BGP-CT) with Underlying Colored SR-TE Tunnels Overview.]