Segment Routing LSP Configuration | Junos OS - Juniper Networks

Distributed CSPF Computation Constraints

Segment routing LSP paths are computed when all the configured constraints are met.

The distributed CSPF computation feature supports the following subset of constraints specified in the Internet draft, draft-ietf-spring-segment-routing-policy-03.txt, Segment Routing Policy for Traffic Engineering:

• Inclusion and exclusion of administrative groups.

• Inclusion of loose or strict hop IP addresses.

  Note:

  You can specify only router IDs in the loose or strict hop constraints. Labels and other IP addresses cannot be specified as loose or strict hop constraints in Junos OS Release 19.2R1-S1.

• Maximum number of segment IDs (SIDs) in the segment list.

• Maximum number of segment lists per candidate segment routing path.

The distributed CSPF computation feature for segment routing LSPs does not support the following types of constraints and deployment scenarios:

• IPV6 addresses.

• Inter domain segment routing traffic engineering (SR-TE) LSPs.

• Unnumbered interfaces.

• Multiple protocols routing protocols such as, OSPF, ISIS, and BGP-LS, enabled at the same time.

• Computation with prefixes or anycast addresses as destinations.

• Including and excluding interface IP addresses as constraints.