PCEP Association Groups

By classifying LSPs according to common characteristics or constraints, PCEP association groups enable the PCE to compute paths that satisfy predetermined criteria. Resiliency is one use case in which disjointed paths between the headend and the tailend are computed without the shared links, nodes, or Shared Risk Link Groups (SRLGs), as specified in RFC8800.
Policy-based paths optimized for metrics like latency or IGP cost, as specified in the RFC9005, represent another use case.
Two iterations between Nokia NSP as a PCE and H3C CR16005E-F as a PCC were conducted, which covered both scenarios of disjointed paths and policy-based paths.

The test steps are:

• Establish a PCEP session between the PCE and PCC
• Configure association groups on the PCE with attributes such as diversity or policy
• Request a path from the PCC that specifies the desired policy