A YANG Data Model for requesting path computation

In certain scenarios — particularly within hierarchical Software- Defined Networking (SDN) environments—the topology information provided by a Traffic Engineering (TE) network provider may be insufficient for a client to perform end-to-end multi-domain path computation. In such cases, the client may need to delegate the computation of specific intra-domain paths to the TE provider, leveraging the resulting path segments to construct optimal multi- domain end-to-end paths. This document defines a mechanism to enable path computation requests by augmenting the Remote Procedure Calls (RPCs) specified in RFC YYYY. The augmented RPCs support path computation on demand, allowing clients to request intra-domain TE path computations from the provider while maintaining control over inter-domain path selection. Additionally, this document outlines several use cases in which such path computation requests are beneficial, particularly in environments where YANG-based management protocols—such as NETCONF or RESTCONF—are used for network automation and control.