Path Computation Element Communication Protocol (PCEP) Extensions for Stateful PCE

Optimizations of Label Switched Path State Synchronization Procedures for a Stateful PCE

“…This document uses the following terms defined in [RFC8231]: Redelegation Timeout Interval, LSP State Report, and LSP Update Request.…”

“…State Synchronization is performed immediately after the initialization phase [RFC5440]. [RFC8231] describes the basic mechanism for State Synchronization.…”

“…This requires a State Synchronization mechanism between the PCE and the network, the PCE and the PCC, and cooperating PCEs. [RFC8231] Support for each of the synchronization optimization capabilities is advertised during the PCEP initialization phase. See Section 7 for the new flags defined in this document.…”

Extensions to the Path Computation Element Communication Protocol (PCEP) to Compute Service-Aware Label Switched Paths (LSPs)

“…The new metric type and objective functions defined in this document can also be used with the stateful PCE extensions. The format of PCEP messages described in [RFC8231] and [PCE-INITIATED] uses <intended-attribute-list> and <attribute-list>, respectively, (where the <intended-attribute-list> is the attribute-list defined in Section 6.5 of [RFC5440] and extended in Section 5.2 of this document) for the purpose of including the service-aware parameters.…”

“…The format of the PCRpt message is described in [RFC8231], which uses the <intended-attribute-list>, which is the attribute-list defined in Section 6.5 of [RFC5440] and extended by PCEP extensions.…”