YANG Data Model for requesting Path Computation
draft-ietf-teas-yang-path-computation-12

Document Type Active Internet-Draft (teas WG)
Authors Italo Busi  , Sergio Belotti  , Victor Lopez  , Anurag Sharma  , Yan Shi 
Last updated 2021-02-08
Replaces draft-busibel-teas-yang-path-computation
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TEAS Working Group                                     Italo Busi (Ed.)
Internet Draft                                                   Huawei
Intended status: Standard Track                    Sergio Belotti (Ed.)
Expires: August 2021                                              Nokia
                                                           Victor Lopez
                                                             Telefonica
                                                          Anurag Sharma
                                                                 Google
                                                                Yan Shi
                                                           China Unicom

                                                       February 8, 2021

              YANG Data Model for requesting Path Computation
                 draft-ietf-teas-yang-path-computation-12

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Abstract

   There are scenarios, typically in a hierarchical Software-Defined
   Networking (SDN) context, where the topology information provided by
   a Traffic Engineering (TE) network provider may not be sufficient
   for its client to perform end-to-end path computation. In these
   cases the client would need to request the provider to calculate
   some (partial) feasible paths.

   This document defines a YANG data model for a Remote Procedure Call
   (RPC) to request path computation. This model complements the
   solution, defined in RFCXXXX, to configure a TE tunnel path in
   "compute-only" mode.

   [RFC EDITOR NOTE: Please replace RFC XXXX with the RFC number of
   draft-ietf-teas-yang-te once it has been published.

   Moreover this document describes some use cases where a path
   computation request, via YANG-based protocols (e.g., NETCONF or
   RESTCONF), can be needed.

Table of Contents

   1. Introduction...................................................3
      1.1. Terminology...............................................5
      1.2. Tree Diagram..............................................5
      1.3. Prefixes in Data Node Names...............................6
   2. Use Cases......................................................6
      2.1. Packet/Optical Integration................................6

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Internet-Draft        Yang for Path Computation           February 2021

      2.2. Multi-domain TE networks.................................11
      2.3. Data Center Interconnections.............................13
      2.4. Backward Recursive Path Computation scenario.............15
      2.5. Hierarchical PCE scenario................................16
   3. Motivations...................................................18
      3.1. Motivation for a YANG Model..............................18
         3.1.1. Benefits of common data models......................18
         3.1.2. Benefits of a single interface......................19
         3.1.3. Extensibility.......................................20
      3.2. Interactions with TE topology............................20
         3.2.1. TE topology aggregation.............................21
         3.2.2. TE topology abstraction.............................24
         3.2.3. Complementary use of TE topology and path computation26
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