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Configure LSP Routing in a Network Slice by Using a Path Computation Profile

A path computation profile defines the set of traffic engineering (TE) constraints (for example, admin color, cost, and delay) that Paragon Pathfinder uses to compute label-switched-paths (LSPs).

To configure LSP routing in a network slice by using computation profiles, you must have prior knowledge about:

  • General TE concepts
  • RFC7950, The YANG 1.1 Data Modeling Language
  • RFC7951, JSON Encoding of Data Modeled with YANG
  • RFC8040, Internet Web Replication and Caching Taxonomy
  • RESTCONF protocol
You can use path computation profiles for deciding the routing of LSPs within a network slice. For example, you can define a profile for routing LSPs with admin color 150 through a slice with the slice ID 100 or, you can also define a profile to route LSPs with slice ID 100 with a delay of 10 ms.

You can route PCC-delegated and PCC-controlled LSPs by using path computation profiles. You cannot route RSVP LSPs and PCE-initiated LSPs by using computational profiles.

Before you create a profile, ensure that you have access to and understand the following:
  • juniper-pathfinder-lsp-policy.yang

  • juniper-pathfinder-profile.yang

  • lsp.json (REST LSP model)

To use a path computation profile for configuring network slices, you must:

  1. Create a profile (defined by the juniper-pathfinder-profile YANG model) in the RESTCONF interface .
  2. Configure a policy (defined by the juniper-pathfinder-lsp-policy YANG model) to map the LSP to the profile by using the RESCONF interface .
The following example profile routes LSPs on links that have lower delay.
The following sample of a policy uses the low-delay computation profile on LSPs that have
  • String DEMO in their name, or
  • SR-TE policy defined with admin color or SR-TE color between 100 and 200
You can interpret the policy condition by using grule. The LSP data follows the Paragon Pathfinder REST API model.