RIB YANG Data Model
draft-ietf-rtgwg-yang-rib-extend-05
Document Type Active Internet-Draft (rtgwg WG)
Authors Acee Lindem  , Yingzhen Qu 
Last updated 2020-09-18
Replaces draft-acee-rtgwg-yang-rib-extend
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Network Working Group                                          A. Lindem
Internet-Draft                                             Cisco Systems
Intended status: Standards Track                                   Y. Qu
Expires: March 22, 2021                                        Futurewei
                                                      September 18, 2020

                          RIB YANG Data Model
                  draft-ietf-rtgwg-yang-rib-extend-05

Abstract

   The Routing Information Base (RIB) is a list of routes and their
   corresponding administrative data and operational state.

   RFC 8349 defines the basic building blocks for RIB, and this model
   augments it to support multiple next-hops (aka, paths) for each route
   as well as additional attributes.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
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   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on March 22, 2021.

Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of

Lindem & Qu              Expires March 22, 2021                 [Page 1]
Internet-Draft                  YANG RIB                  September 2020

   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology and Notation  . . . . . . . . . . . . . . . . . .   3
     2.1.  Glossary of New Terms . . . . . . . . . . . . . . . . . .   4
     2.2.  Tree Diagrams . . . . . . . . . . . . . . . . . . . . . .   4
     2.3.  Prefixes in Data Node Names . . . . . . . . . . . . . . .   4
   3.  Design of the Model . . . . . . . . . . . . . . . . . . . . .   4
     3.1.  RIB Tags and Preference . . . . . . . . . . . . . . . . .   5
     3.2.  Multiple next-hops  . . . . . . . . . . . . . . . . . . .   5
     3.3.  Repair path . . . . . . . . . . . . . . . . . . . . . . .   5
   4.  RIB Model Tree  . . . . . . . . . . . . . . . . . . . . . . .   5
   5.  RIB YANG Model  . . . . . . . . . . . . . . . . . . . . . . .   6
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  14
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  14
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  15
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .  15
     8.2.  Informative References  . . . . . . . . . . . . . . . . .  16
   Appendix A.  Combined Tree Diagram  . . . . . . . . . . . . . . .  16
   Appendix B.  ietf-rib-extension.yang example  . . . . . . . . . .  20
   Appendix C.  Acknowledgments  . . . . . . . . . . . . . . . . . .  22
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  22

1.  Introduction

   This document defines a YANG, [RFC6020][RFC7950], data model which
   extends the generic data model for RIB by augmenting the ietf-routing
   model as defined in [RFC8349].

   RIB is a collection of best routes from all routing protocols.
   Within a protocol routes are selected based on the metrics in use by
   that protocol, and the protocol install its best routes to RIB.  RIB
   selects the best route by comparing the route preference (aka,
   administrative distance) of the associated protocol.

   The augmentations described herein extend the RIB to support multiple
   paths per route, route metrics, and administrative tags.

   The YANG modules in this document conform to the Network Management
   Datastore Architecture (NMDA) [RFC8342].

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2.  Terminology and Notation

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
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