Internet-Draft OSPF SR MPLS YANG December 2023
Qu, et al. Expires 2 July 2024 [Page]
Workgroup:
Internet
Internet-Draft:
draft-ietf-ospf-sr-yang-26
Published:
Intended Status:
Standards Track
Expires:
Authors:
Y. Qu
Futurewei Technologies
A. Lindem
LabN Consulting, L.L.C.
J. Zhang
Juniper Networks
I. Chen
The MITRE Corporation

A YANG Data Model for OSPF Segment Routing for the MPLS Data Plane

Abstract

This document defines a YANG data module that can be used to configure and manage OSPF Extensions for Segment Routing for the MPLS data plane.

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 working documents as Internet-Drafts. The list of current Internet-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 2 July 2024.

▲

Table of Contents

1. Overview

This document defines a YANG data model [RFC7950] that can be used to configure and manage OSPFv2 extensions for Segment Routing [RFC8665] and OSPFv3 extensions for Segment Routing [RFC8666] for the MPLS data plane. It is an augmentation to the OSPF YANG data model [RFC9129].

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

1.1. Requirements Language

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in [RFC2119].

1.2. Tree Diagrams

This document uses the graphical representation of data models defined in [RFC8340].

2. OSPF Segment Routing

This document defines a model for OSPF Segment Routing Extensions for both OSPFv2 [RFC8665] and OSPFv3 [RFC8666]. It is an augmentation of the OSPF base model.

The OSPF SR YANG module requires support for the base segment routing module [RFC9020], which defines the global segment routing configuration independent of any specific routing protocol configuration, and support of OSPF base model[RFC9129] which defines basic OSPF configuration and state.

module: ietf-ospf-sr-mpls
augment /rt:routing/rt:control-plane-protocols
          /rt:control-plane-protocol/ospf:ospf:
  +--rw segment-routing
  |  +--rw enabled?    boolean
  |  +--rw bindings {mapping-server}?
  |     +--rw advertise
  |     |  +--rw policies*   leafref
  |     +--rw receive?     boolean
  +--rw protocol-srgb {sr-mpls:protocol-srgb}?
     +--rw srgb* [lower-bound upper-bound]
        +--rw lower-bound    uint32
        +--rw upper-bound    uint32
augment /rt:routing/rt:control-plane-protocols
          /rt:control-plane-protocol/ospf:ospf/ospf:areas
          /ospf:area/ospf:interfaces/ospf:interface:
  +--rw segment-routing
     +--rw adjacency-sid
        +--rw adj-sids* [value]
        |  +--rw value-type?   enumeration
        |  +--rw value         uint32
        |  +--rw protected?    boolean
        |  +--rw weight?       uint8
        |  +--rw neighbor-id?  inet:ip-address
        +--rw advertise-adj-group-sid* [group-id]
        |  +--rw group-id    uint32
        +--rw advertise-protection?      enumeration
augment /rt:routing/rt:control-plane-protocols
          /rt:control-plane-protocol/ospf:ospf/ospf:areas
          /ospf:area/ospf:interfaces/ospf:interface
          /ospf:fast-reroute/ospf:lfa:
  +--rw ti-lfa {ti-lfa}?
     +--rw enable?                   boolean
     +--rw selection-tie-breakers
        +--rw node-protection!
        |  +--rw priority?   uint8
        +--rw srlg-disjoint!
           +--rw priority?   uint8
augment /rt:routing/rt:control-plane-protocols
          /rt:control-plane-protocol/ospf:ospf/ospf:areas
          /ospf:area/ospf:interfaces/ospf:interface
          /ospf:fast-reroute/ospf:lfa/ospf:remote-lfa:
  +--rw use-segment-routing-path?   boolean {remote-lfa-sr}?
augment /rt:routing/rt:control-plane-protocols
          /rt:control-plane-protocol/ospf:ospf/ospf:areas
          /ospf:area/ospf:interfaces/ospf:interface/ospf:database
          /ospf:link-scope-lsa-type/ospf:link-scope-lsas
          /ospf:link-scope-lsa/ospf:version/ospf:ospfv2
          /ospf:ospfv2/ospf:body/ospf:opaque
          /ospf:extended-prefix-opaque:
  +--ro extended-prefix-range-tlvs
     +--ro extended-prefix-range-tlv* []
        +--ro prefix-length?                 uint8
        +--ro af?                            uint8
        +--ro range-size?                    uint16
        +--ro extended-prefix-range-flags
        |  +--ro bits*   identityref
        +--ro prefix?                        inet:ip-prefix
        +--ro prefix-sid-sub-tlvs
        |  +--ro prefix-sid-sub-tlv* []
        |     +--ro prefix-sid-flags
        |     |  +--ro bits*   identityref
        |     +--ro mt-id?              uint8
        |     +--ro algorithm?          identityref
        |     +--ro sid?                uint32
        +--ro unknown-tlvs
           +--ro unknown-tlv* []
              +--ro type?     uint16
              +--ro length?   uint16
              +--ro value?    yang:hex-string
augment /rt:routing/rt:control-plane-protocols
          /rt:control-plane-protocol/ospf:ospf/ospf:areas
          /ospf:area/ospf:database/ospf:area-scope-lsa-type
          /ospf:area-scope-lsas/ospf:area-scope-lsa/ospf:version
          /ospf:ospfv2/ospf:ospfv2/ospf:body/ospf:opaque
          /ospf:extended-prefix-opaque:
  +--ro extended-prefix-range-tlvs
     +--ro extended-prefix-range-tlv* []
        +--ro prefix-length?                 uint8
        +--ro af?                            uint8
        +--ro range-size?                    uint16
        +--ro extended-prefix-range-flags
        |  +--ro bits*   identityref
        +--ro prefix?                        inet:ip-prefix
        +--ro prefix-sid-sub-tlvs
        |  +--ro prefix-sid-sub-tlv* []
        |     +--ro prefix-sid-flags
        |     |  +--ro bits*   identityref
        |     +--ro mt-id?              uint8
        |     +--ro algorithm?          identityref
        |     +--ro sid?                uint32
        +--ro unknown-tlvs
           +--ro unknown-tlv* []
              +--ro type?     uint16
              +--ro length?   uint16
              +--ro value?    yang:hex-string
augment /rt:routing/rt:control-plane-protocols
          /rt:control-plane-protocol/ospf:ospf/ospf:database
          /ospf:as-scope-lsa-type/ospf:as-scope-lsas
          /ospf:as-scope-lsa/ospf:version/ospf:ospfv2/ospf:ospfv2
          /ospf:body/ospf:opaque/ospf:extended-prefix-opaque:
  +--ro extended-prefix-range-tlvs
     +--ro extended-prefix-range-tlv* []
        +--ro prefix-length?                 uint8
        +--ro af?                            uint8
        +--ro range-size?                    uint16
        +--ro extended-prefix-range-flags
        |  +--ro bits*   identityref
        +--ro prefix?                        inet:ip-prefix
        +--ro prefix-sid-sub-tlvs
        |  +--ro prefix-sid-sub-tlv* []
        |     +--ro prefix-sid-flags
        |     |  +--ro bits*   identityref
        |     +--ro mt-id?              uint8
        |     +--ro algorithm?          identityref
        |     +--ro sid?                uint32
        +--ro unknown-tlvs
           +--ro unknown-tlv* []
              +--ro type?     uint16
              +--ro length?   uint16
              +--ro value?    yang:hex-string
augment /rt:routing/rt:control-plane-protocols
          /rt:control-plane-protocol/ospf:ospf/ospf:areas
          /ospf:area/ospf:interfaces/ospf:interface/ospf:database
          /ospf:link-scope-lsa-type/ospf:link-scope-lsas
          /ospf:link-scope-lsa/ospf:version/ospf:ospfv2
          /ospf:ospfv2/ospf:body/ospf:opaque
          /ospf:extended-prefix-opaque/ospf:extended-prefix-tlv:
  +--ro prefix-sid-sub-tlvs
     +--ro prefix-sid-sub-tlv* []
        +--ro prefix-sid-flags
        |  +--ro bits*   identityref
        +--ro mt-id?              uint8
        +--ro algorithm?          identityref
        +--ro sid?                uint32
augment /rt:routing/rt:control-plane-protocols
          /rt:control-plane-protocol/ospf:ospf/ospf:areas
          /ospf:area/ospf:database/ospf:area-scope-lsa-type
          /ospf:area-scope-lsas/ospf:area-scope-lsa/ospf:version
          /ospf:ospfv2/ospf:ospfv2/ospf:body/ospf:opaque
          /ospf:extended-prefix-opaque/ospf:extended-prefix-tlv:
  +--ro prefix-sid-sub-tlvs
     +--ro prefix-sid-sub-tlv* []
        +--ro prefix-sid-flags
        |  +--ro bits*   identityref
        +--ro mt-id?              uint8
        +--ro algorithm?          identityref
        +--ro sid?                uint32
augment /rt:routing/rt:control-plane-protocols
          /rt:control-plane-protocol/ospf:ospf/ospf:database
          /ospf:as-scope-lsa-type/ospf:as-scope-lsas
          /ospf:as-scope-lsa/ospf:version/ospf:ospfv2/ospf:ospfv2
          /ospf:body/ospf:opaque/ospf:extended-prefix-opaque
          /ospf:extended-prefix-tlv:
  +--ro prefix-sid-sub-tlvs
     +--ro prefix-sid-sub-tlv* []
        +--ro prefix-sid-flags
        |  +--ro bits*   identityref
        +--ro mt-id?              uint8
        +--ro algorithm?          identityref
        +--ro sid?                uint32
augment /rt:routing/rt:control-plane-protocols
          /rt:control-plane-protocol/ospf:ospf/ospf:areas
          /ospf:area/ospf:database/ospf:area-scope-lsa-type
          /ospf:area-scope-lsas/ospf:area-scope-lsa/ospf:version
          /ospf:ospfv2/ospf:ospfv2/ospf:body/ospf:opaque
          /ospf:extended-link-opaque/ospf:extended-link-tlv:
  +--ro adj-sid-sub-tlvs
  |  +--ro adj-sid-sub-tlv* []
  |     +--ro adj-sid-flags
  |     |  +--ro bits*   identityref
  |     +--ro mt-id?           uint8
  |     +--ro weight?          uint8
  |     +--ro sid?             uint32
  +--ro lan-adj-sid-sub-tlvs
     +--ro lan-adj-sid-sub-tlv* []
        +--ro lan-adj-sid-flags
        |  +--ro bits*   identityref
        +--ro mt-id?                uint8
        +--ro weight?               uint8
        +--ro neighbor-router-id?   rt-types:router-id
        +--ro sid?                  uint32
augment /rt:routing/rt:control-plane-protocols
          /rt:control-plane-protocol/ospf:ospf/ospf:areas
          /ospf:area/ospf:interfaces/ospf:interface/ospf:database
          /ospf:link-scope-lsa-type/ospf:link-scope-lsas
          /ospf:link-scope-lsa/ospf:version/ospf:ospfv2
          /ospf:ospfv2/ospf:body/ospf:opaque/ospf:ri-opaque:
  +--ro sr-algorithm-tlv
  |  +--ro sr-algorithm*   identityref
  +--ro sid-range-tlvs
  |  +--ro sid-range-tlv* []
  |     +--ro range-size?    rt-types:uint24
  |     +--ro sid-sub-tlv
  |        +--ro sid?   uint32
  +--ro local-block-tlvs
  |  +--ro local-block-tlv* []
  |     +--ro range-size?    rt-types:uint24
  |     +--ro sid-sub-tlv
  |        +--ro sid?   uint32
  +--ro srms-preference-tlv
     +--ro preference?   uint8
augment /rt:routing/rt:control-plane-protocols
          /rt:control-plane-protocol/ospf:ospf/ospf:areas
          /ospf:area/ospf:database/ospf:area-scope-lsa-type
          /ospf:area-scope-lsas/ospf:area-scope-lsa/ospf:version
          /ospf:ospfv2/ospf:ospfv2/ospf:body/ospf:opaque
          /ospf:ri-opaque:
  +--ro sr-algorithm-tlv
  |  +--ro sr-algorithm*   identityref
  +--ro sid-range-tlvs
  |  +--ro sid-range-tlv* []
  |     +--ro range-size?    rt-types:uint24
  |     +--ro sid-sub-tlv
  |        +--ro sid?   uint32
  +--ro local-block-tlvs
  |  +--ro local-block-tlv* []
  |     +--ro range-size?    rt-types:uint24
  |     +--ro sid-sub-tlv
  |        +--ro sid?   uint32
  +--ro srms-preference-tlv
     +--ro preference?   uint8
augment /rt:routing/rt:control-plane-protocols
          /rt:control-plane-protocol/ospf:ospf/ospf:database
          /ospf:as-scope-lsa-type/ospf:as-scope-lsas
          /ospf:as-scope-lsa/ospf:version/ospf:ospfv2/ospf:ospfv2
          /ospf:body/ospf:opaque/ospf:ri-opaque:
  +--ro sr-algorithm-tlv
  |  +--ro sr-algorithm*   identityref
  +--ro sid-range-tlvs
  |  +--ro sid-range-tlv* []
  |     +--ro range-size?    rt-types:uint24
  |     +--ro sid-sub-tlv
  |        +--ro sid?   uint32
  +--ro local-block-tlvs
  |  +--ro local-block-tlv* []
  |     +--ro range-size?    rt-types:uint24
  |     +--ro sid-sub-tlv
  |        +--ro sid?   uint32
  +--ro srms-preference-tlv
     +--ro preference?   uint8
augment /rt:routing/rt:control-plane-protocols
          /rt:control-plane-protocol/ospf:ospf/ospf:database
          /ospf:as-scope-lsa-type/ospf:as-scope-lsas
          /ospf:as-scope-lsa/ospf:version/ospf:ospfv3/ospf:ospfv3
          /ospf:body/ospf:router-information:
  +--ro sr-algorithm-tlv
  |  +--ro sr-algorithm*   identityref
  +--ro sid-range-tlvs
  |  +--ro sid-range-tlv* []
  |     +--ro range-size?    rt-types:uint24
  |     +--ro sid-sub-tlv
  |        +--ro sid?   uint32
  +--ro local-block-tlvs
  |  +--ro local-block-tlv* []
  |     +--ro range-size?    rt-types:uint24
  |     +--ro sid-sub-tlv
  |        +--ro sid?   uint32
  +--ro srms-preference-tlv
     +--ro preference?   uint8
augment /rt:routing/rt:control-plane-protocols
          /rt:control-plane-protocol/ospf:ospf/ospf:areas
          /ospf:area/ospf:database/ospf:area-scope-lsa-type
          /ospf:area-scope-lsas/ospf:area-scope-lsa/ospf:version
          /ospf:ospfv3/ospf:ospfv3/ospf:body
          /ospf:router-information:
  +--ro sr-algorithm-tlv
  |  +--ro sr-algorithm*   identityref
  +--ro sid-range-tlvs
  |  +--ro sid-range-tlv* []
  |     +--ro range-size?    rt-types:uint24
  |     +--ro sid-sub-tlv
  |        +--ro sid?   uint32
  +--ro local-block-tlvs
  |  +--ro local-block-tlv* []
  |     +--ro range-size?    rt-types:uint24
  |     +--ro sid-sub-tlv
  |        +--ro sid?   uint32
  +--ro srms-preference-tlv
     +--ro preference?   uint8
augment /rt:routing/rt:control-plane-protocols
          /rt:control-plane-protocol/ospf:ospf/ospf:areas
          /ospf:area/ospf:interfaces/ospf:interface/ospf:database
          /ospf:link-scope-lsa-type/ospf:link-scope-lsas
          /ospf:link-scope-lsa/ospf:version/ospf:ospfv3
          /ospf:ospfv3/ospf:body/ospf:router-information:
  +--ro sr-algorithm-tlv
  |  +--ro sr-algorithm*   identityref
  +--ro sid-range-tlvs
  |  +--ro sid-range-tlv* []
  |     +--ro range-size?    rt-types:uint24
  |     +--ro sid-sub-tlv
  |        +--ro sid?   uint32
  +--ro local-block-tlvs
  |  +--ro local-block-tlv* []
  |     +--ro range-size?    rt-types:uint24
  |     +--ro sid-sub-tlv
  |        +--ro sid?   uint32
  +--ro srms-preference-tlv
     +--ro preference?   uint8
augment /rt:routing/rt:control-plane-protocols
          /rt:control-plane-protocol/ospf:ospf/ospf:areas
          /ospf:area/ospf:database/ospf:area-scope-lsa-type
          /ospf:area-scope-lsas/ospf:area-scope-lsa/ospf:version
          /ospf:ospfv3/ospf:ospfv3/ospf:body
          /ospfv3-e-lsa:e-intra-area-prefix:
  +--ro ospfv3-extended-prefix-range-tlvs
     +--ro extended-prefix-range-tlv* []
        +--ro prefix-length?         uint8
        +--ro af?                    uint8
        +--ro range-size?            uint16
        +--ro prefix?                inet:ip-prefix
        +--ro prefix-sid-sub-tlvs
        |  +--ro prefix-sid-sub-tlv* []
        |     +--ro ospfv3-prefix-sid-flags
        |     |  +--ro bits*   identityref
        |     +--ro algorithm?                 identityref
        |     +--ro sid?                       uint32
        +--ro unknown-tlvs
           +--ro unknown-tlv* []
              +--ro type?     uint16
              +--ro length?   uint16
              +--ro value?    yang:hex-string
augment /rt:routing/rt:control-plane-protocols
          /rt:control-plane-protocol/ospf:ospf/ospf:areas
          /ospf:area/ospf:database/ospf:area-scope-lsa-type
          /ospf:area-scope-lsas/ospf:area-scope-lsa/ospf:version
          /ospf:ospfv3/ospf:ospfv3/ospf:body
          /ospfv3-e-lsa:e-inter-area-prefix:
  +--ro ospfv3-extended-prefix-range-tlvs
     +--ro extended-prefix-range-tlv* []
        +--ro prefix-length?         uint8
        +--ro af?                    uint8
        +--ro range-size?            uint16
        +--ro prefix?                inet:ip-prefix
        +--ro prefix-sid-sub-tlvs
        |  +--ro prefix-sid-sub-tlv* []
        |     +--ro ospfv3-prefix-sid-flags
        |     |  +--ro bits*   identityref
        |     +--ro algorithm?                 identityref
        |     +--ro sid?                       uint32
        +--ro unknown-tlvs
           +--ro unknown-tlv* []
              +--ro type?     uint16
              +--ro length?   uint16
              +--ro value?    yang:hex-string
augment /rt:routing/rt:control-plane-protocols
          /rt:control-plane-protocol/ospf:ospf/ospf:database
          /ospf:as-scope-lsa-type/ospf:as-scope-lsas
          /ospf:as-scope-lsa/ospf:version/ospf:ospfv3/ospf:ospfv3
          /ospf:body/ospfv3-e-lsa:e-as-external:
  +--ro ospfv3-extended-prefix-range-tlvs
     +--ro extended-prefix-range-tlv* []
        +--ro prefix-length?         uint8
        +--ro af?                    uint8
        +--ro range-size?            uint16
        +--ro prefix?                inet:ip-prefix
        +--ro prefix-sid-sub-tlvs
        |  +--ro prefix-sid-sub-tlv* []
        |     +--ro ospfv3-prefix-sid-flags
        |     |  +--ro bits*   identityref
        |     +--ro algorithm?                 identityref
        |     +--ro sid?                       uint32
        +--ro unknown-tlvs
           +--ro unknown-tlv* []
              +--ro type?     uint16
              +--ro length?   uint16
              +--ro value?    yang:hex-string
augment /rt:routing/rt:control-plane-protocols
          /rt:control-plane-protocol/ospf:ospf/ospf:areas
          /ospf:area/ospf:database/ospf:area-scope-lsa-type
          /ospf:area-scope-lsas/ospf:area-scope-lsa/ospf:version
          /ospf:ospfv3/ospf:ospfv3/ospf:body/ospfv3-e-lsa:e-nssa:
  +--ro ospfv3-extended-prefix-range-tlvs
     +--ro extended-prefix-range-tlv* []
        +--ro prefix-length?         uint8
        +--ro af?                    uint8
        +--ro range-size?            uint16
        +--ro prefix?                inet:ip-prefix
        +--ro prefix-sid-sub-tlvs
        |  +--ro prefix-sid-sub-tlv* []
        |     +--ro ospfv3-prefix-sid-flags
        |     |  +--ro bits*   identityref
        |     +--ro algorithm?                 identityref
        |     +--ro sid?                       uint32
        +--ro unknown-tlvs
           +--ro unknown-tlv* []
              +--ro type?     uint16
              +--ro length?   uint16
              +--ro value?    yang:hex-string
augment /rt:routing/rt:control-plane-protocols
          /rt:control-plane-protocol/ospf:ospf/ospf:areas
          /ospf:area/ospf:interfaces/ospf:interface/ospf:database
          /ospf:link-scope-lsa-type/ospf:link-scope-lsas
          /ospf:link-scope-lsa/ospf:version/ospf:ospfv3
          /ospf:ospfv3/ospf:body/ospfv3-e-lsa:e-link
          /ospfv3-e-lsa:e-link-tlvs
          /ospfv3-e-lsa:intra-prefix-tlv:
  +--ro prefix-sid-sub-tlvs
     +--ro prefix-sid-sub-tlv* []
        +--ro ospfv3-prefix-sid-flags
        |  +--ro bits*   identityref
        +--ro algorithm?                 identityref
        +--ro sid?                       uint32
augment /rt:routing/rt:control-plane-protocols
          /rt:control-plane-protocol/ospf:ospf/ospf:areas
          /ospf:area/ospf:database/ospf:area-scope-lsa-type
          /ospf:area-scope-lsas/ospf:area-scope-lsa/ospf:version
          /ospf:ospfv3/ospf:ospfv3/ospf:body
          /ospfv3-e-lsa:e-intra-area-prefix
          /ospfv3-e-lsa:e-intra-prefix-tlvs
          /ospfv3-e-lsa:intra-prefix-tlv:
  +--ro prefix-sid-sub-tlvs
     +--ro prefix-sid-sub-tlv* []
        +--ro ospfv3-prefix-sid-flags
        |  +--ro bits*   identityref
        +--ro algorithm?                 identityref
        +--ro sid?                       uint32
augment /rt:routing/rt:control-plane-protocols
          /rt:control-plane-protocol/ospf:ospf/ospf:areas
          /ospf:area/ospf:database/ospf:area-scope-lsa-type
          /ospf:area-scope-lsas/ospf:area-scope-lsa/ospf:version
          /ospf:ospfv3/ospf:ospfv3/ospf:body
          /ospfv3-e-lsa:e-inter-area-prefix
          /ospfv3-e-lsa:e-inter-prefix-tlvs
          /ospfv3-e-lsa:inter-prefix-tlv:
  +--ro prefix-sid-sub-tlvs
     +--ro prefix-sid-sub-tlv* []
        +--ro ospfv3-prefix-sid-flags
        |  +--ro bits*   identityref
        +--ro algorithm?                 identityref
        +--ro sid?                       uint32
augment /rt:routing/rt:control-plane-protocols
          /rt:control-plane-protocol/ospf:ospf/ospf:database
          /ospf:as-scope-lsa-type/ospf:as-scope-lsas
          /ospf:as-scope-lsa/ospf:version/ospf:ospfv3/ospf:ospfv3
          /ospf:body/ospfv3-e-lsa:e-as-external
          /ospfv3-e-lsa:e-external-tlvs
          /ospfv3-e-lsa:external-prefix-tlv:
  +--ro prefix-sid-sub-tlvs
     +--ro prefix-sid-sub-tlv* []
        +--ro ospfv3-prefix-sid-flags
        |  +--ro bits*   identityref
        +--ro algorithm?                 identityref
        +--ro sid?                       uint32
augment /rt:routing/rt:control-plane-protocols
          /rt:control-plane-protocol/ospf:ospf/ospf:areas
          /ospf:area/ospf:database/ospf:area-scope-lsa-type
          /ospf:area-scope-lsas/ospf:area-scope-lsa/ospf:version
          /ospf:ospfv3/ospf:ospfv3/ospf:body/ospfv3-e-lsa:e-nssa
          /ospfv3-e-lsa:e-external-tlvs
          /ospfv3-e-lsa:external-prefix-tlv:
  +--ro prefix-sid-sub-tlvs
     +--ro prefix-sid-sub-tlv* []
        +--ro ospfv3-prefix-sid-flags
        |  +--ro bits*   identityref
        +--ro algorithm?                 identityref
        +--ro sid?                       uint32
augment /rt:routing/rt:control-plane-protocols
          /rt:control-plane-protocol/ospf:ospf/ospf:areas
          /ospf:area/ospf:database/ospf:area-scope-lsa-type
          /ospf:area-scope-lsas/ospf:area-scope-lsa/ospf:version
          /ospf:ospfv3/ospf:ospfv3/ospf:body
          /ospfv3-e-lsa:e-router/ospfv3-e-lsa:e-router-tlvs
          /ospfv3-e-lsa:link-tlv:
  +--ro adj-sid-sub-tlvs
  |  +--ro adj-sid-sub-tlv* []
  |     +--ro adj-sid-flags
  |     |  +--ro bits*   identityref
  |     +--ro weight?          uint8
  |     +--ro sid?             uint32
  +--ro lan-adj-sid-sub-tlvs
     +--ro lan-adj-sid-sub-tlv* []
        +--ro lan-adj-sid-flags
        |  +--ro bits*   identityref
        +--ro weight?               uint8
        +--ro neighbor-router-id?   rt-types;router-id
        +--ro sid?                  uint32

2.1. OSPF Segment Routing YANG Module

[RFC2328], [RFC4750], [RFC5340], [RFC5643], [RFC5838], [RFC6991], [RFC8102], [RFC8294], [RFC8343], [RFC8476], [RFC8349] and [I-D.ietf-rtgwg-segment-routing-ti-lfa] are referenced in the YANG data model.

<CODE BEGINS> file "ietf-ospf-sr-mpls@2023-12-30.yang"
module ietf-ospf-sr-mpls {
  yang-version 1.1;
  namespace "urn:ietf:params:xml:ns:yang:ietf-ospf-sr-mpls";
  prefix ospf-sr-mpls;

  import ietf-inet-types {
    prefix inet;
    reference
      "RFC 6991 - Common YANG Data Types";
  }
  import ietf-routing-types {
    prefix rt-types;
    reference
      "RFC 8294 - Common YANG Data Types for the Routing Area";
  }
  import ietf-routing {
    prefix rt;
    reference
      "RFC 8349 - A YANG Data Model for Routing
                  Management (NMDA Version)";
  }
  import ietf-segment-routing-common {
    prefix sr-cmn;
    reference
      "RFC 9020 - YANG Data Model for Segment Routing";
  }
  import ietf-segment-routing-mpls {
    prefix sr-mpls;
    reference
      "RFC 9020 - YANG Data Model for Segment Routing";
  }
  import ietf-ospf {
    prefix ospf;
    reference
      "RFC 9129 - YANG Data Model for the OSPF Protocol";
  }
  import ietf-ospfv3-extended-lsa {
    prefix ospfv3-e-lsa;
    reference
      "RFC XXXX - YANG Data Model for OSPFv3 Extended LSAs";
  }

  organization
    "IETF LSR - Link State Routing Working Group";
  contact
    "WG Web:   <https://datatracker.ietf.org/wg/lsr/>
     WG List:  <mailto:lsr@ietf.org>

     Author:   Yingzhen Qu
               <mailto:yingzhen.ietf@gmail.com>
     Author:   Acee Lindem
               <mailto:acee.ietf@gmail.com>
     Author:   Derek Yeung
               <mailto:derek@arrcus.com>
     Author:   Jeffrey Zhang
               <mailto:zzhang@juniper.net>
     Author:   Ing-Wher Chen
               <mailto:ingwherchen@mitre.org>";
  description
    "This YANG module defines the generic configuration
     and operational state for OSPF Segment Routing (SR), which
     is common across all of the vendor implementations. It is
     intended that the module will be extended by vendors to
     define vendor-specific OSPF Segment Routing configuration
     and operational parameters for the MPLS data plane.

     This YANG model conforms to the Network Management
     Datastore Architecture (NMDA) as described in RFC 8342.

     Copyright (c) 2023 IETF Trust and the persons identified as
     authors of the code.  All rights reserved.

     Redistribution and use in source and binary forms, with or
     without modification, is permitted pursuant to, and subject to
     the license terms contained in, the Revised BSD License set
     forth in Section 4.c of the IETF Trust's Legal Provisions
     Relating to IETF Documents
     (https://trustee.ietf.org/license-info).


     This version of this YANG module is part of RFC XXXX
     (https://www.rfc-editor.org/info/rfcXXXX); see the RFC itself
     for full legal notices.

     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 14 (RFC 2119) (RFC 8174) when, and only when,
     they appear in all capitals, as shown here.

     This version of this YANG module is part of RFC XXXX;
     see the RFC itself for full legal notices.";
  reference
    "RFC XXXX";

  revision 2023-12-30 {
    description
      "Initial revision.";
    reference
      "RFC XXXX: A YANG Data Model for OSPF Segment Routing for
       the MPLS Data Plane";
  }

  feature remote-lfa-sr {
    description
      "Enhance rLFA to use SR path.";
    reference
      "RFC 8102: Remote-LFA Node Protection and Manageability";
  }

  feature ti-lfa {
    description
      "Topology-Independent Loop-Free Alternate (TI-LFA)
       computation using segment routing.";
    reference
      "draft-ietf-rtgwg-segment-routing-ti-lfa -
       Topology-Independent Fast Reroute using Segment Routing";
  }

  identity prefix-sid-bit {
    description
      "Base identity for prefix SID sub-TLV bits.";
    reference
      "RFC 8665: OSPF Extensions for Segment Routing
       RFC 8666: OSPFv3 Extensions for Segment Routing";
  }

  identity np-bit {
    base prefix-sid-bit;
    description
      "No-PHP flag.";
  }

  identity m-bit {
    base prefix-sid-bit;
    description
      "Mapping server flag.";
  }

  identity e-bit {
    base prefix-sid-bit;
    description
      "Explicit-NULL flag.";
  }

  identity v-bit {
    base prefix-sid-bit;
    description
      "Value/Index flag.";
  }

  identity l-bit {
    base prefix-sid-bit;
    description
      "Local flag.";
  }

  identity extended-prefix-range-bit {
    description
      "Base identity for extended prefix range TLV bits.";
  }

  identity ia-bit {
    base extended-prefix-range-bit;
    description
      "Inter-Area flag. If set, advertisement is of
       inter-area type.";
    reference
      "RFC 8665: OSPF Extensions for Segment Routing";
  }

  identity adj-sid-bit {
    description
      "Base identity for Adj-SID sub-TLV bits.";
    reference
      "RFC 8665: OSPF Extensions for Segment Routing
       RFC 8666: OSPFv3 Extensions for Segment Routing";
  }

  identity b-bit {
    base adj-sid-bit;
    description
      "Backup flag.";
  }

  identity vi-bit {
    base adj-sid-bit;
    description
      "Value/Index flag.";
  }

  identity lo-bit {
    base adj-sid-bit;
    description
      "Local/Global flag.";
  }

  identity g-bit {
    base adj-sid-bit;
    description
      "Group flag.";
  }

  identity p-bit {
    base adj-sid-bit;
    description
      "Persistent flag.";
  }

  /* Groupings */

  grouping sid-sub-tlv {
    description
      "SID/Label sub-TLV grouping.";
    reference
      "RFC 8665: OSPF Extensions for Segment Routing
       (Section 6)";
    container sid-sub-tlv {
      description
        "Used to advertise the SID/Label associated with a
         prefix or adjacency.";
      leaf sid {
        type uint32;
        description
          "Segment Identifier (SID) - A 20 bit label or
           32 bit SID.";
      }
    }
  }

  grouping ospfv2-prefix-sid-sub-tlvs {
    description
      "Prefix Segment ID (SID) sub-TLVs.";
    reference
      "RFC 8665: OSPF Extensions for Segment Routing
        (Section 6)";
    container prefix-sid-sub-tlvs {
      description
        "Prefix SID sub-TLV.";
      list prefix-sid-sub-tlv {
        description
          "Prefix SID sub-TLV.";
        container prefix-sid-flags {
          leaf-list bits {
            type identityref {
              base prefix-sid-bit;
            }
            description
              "Prefix SID Sub-TLV bits.";
          }
          description
            "Segment Identifier (SID) Flags.";
        }
        leaf mt-id {
          type uint8;
          description
            "Multi-topology ID.";
        }
        leaf algorithm {
          type identityref {
            base sr-cmn:prefix-sid-algorithm;
          }
          description
            "Algorithm associated with the prefix-SID.";
        }
        leaf sid {
          type uint32;
          description
            "Index or label.";
        }
      }
    }
  }

  grouping ospfv2-extended-prefix-range-tlvs {
    description
      "Extended prefix range TLV grouping.";
    reference
      "RFC 8665: OSPF Extensions for Segment Routing
       (Section 4)";
    container extended-prefix-range-tlvs {
      description
        "List of range of prefixes.";
      list extended-prefix-range-tlv {
        description
          "Range of prefixes.";
        leaf prefix-length {
          type uint8;
          description
            "Length of prefix in bits.";
        }
        leaf af {
          type uint8;
          description
            "Address family for the prefix.";
        }
        leaf range-size {
          type uint16;
          description
            "Number of prefixes covered by the
             advertisement.";
        }
        container extended-prefix-range-flags {
          leaf-list bits {
            type identityref {
              base extended-prefix-range-bit;
            }
            description
              "Extended prefix range TLV bits.";
          }
          description
            "Extended Prefix Range TLV flags.";
        }
        leaf prefix {
          type inet:ip-prefix;
          description
            "Address prefix.";
        }
        uses ospfv2-prefix-sid-sub-tlvs;
        uses ospf:unknown-tlvs;
      }
    }
  }

  grouping sr-algorithm-tlv {
    description
      "SR algorithm TLV grouping.";
    reference
      "RFC 8665: OSPF Extensions for Segment Routing
       (Section 3.1)";
    container sr-algorithm-tlv {
      description
        "All SR algorithm TLVs.";
      leaf-list sr-algorithm {
        type identityref {
          base sr-cmn:prefix-sid-algorithm;
        }
        description
          "Segment Routing (SR) algorithms that the router is
           currently using.";
      }
    }
  }

  grouping sid-range-tlvs {
    description
      "SID Range TLV grouping.";
    reference
      "RFC 8665: OSPF Extensions for Segment Routing
       (Section 3.2)";
    container sid-range-tlvs {
      description
        "List of SID range TLVs.";
      list sid-range-tlv {
        description
          "SID range TLV.";
        leaf range-size {
          type rt-types:uint24;
          description
            "SID range.";
        }
        uses sid-sub-tlv;
      }
    }
  }

  grouping local-block-tlvs {
    description
      "The SR local block TLV contains the
       range of labels reserved for local SIDs.";
    reference
      "RFC 8665: OSPF Extensions for Segment Routing
       (Section 3.3)";
    container local-block-tlvs {
      description
        "List of SRLB TLVs.";
      list local-block-tlv {
        description
          "SRLB TLV.";
        leaf range-size {
          type rt-types:uint24;
          description
            "SID range.";
        }
        uses sid-sub-tlv;
      }
    }
  }

  grouping srms-preference-tlv {
    description
      "The SR Mapping Server (SRMS) preference TLV is
       used to advertise a preference associated with
       the node that acts as an SR Mapping Server. SR
       Mapping Server advertisements with a higher
       preference value are preferred over those with
       a lower preference value.";
    reference
      "RFC 8665: OSPF Extensions for Segment Routing
       (Section 3.4)";
    container srms-preference-tlv {
      description
        "SRMS Preference TLV.";
      leaf preference {
        type uint8;
        description
          "SRMS preference TLV, value from 0 to 255 with
           with 255 being the most preferred.";
      }
    }
  }

  grouping ospfv3-prefix-sid-sub-tlvs {
    description
      "Prefix Segment ID (SID) sub-TLVs.";
    reference
      "RFC 8666: OSPFv3 Extensions for Segment Routing
       (Section 6)";
    container prefix-sid-sub-tlvs {
      description
        "Prefix SID sub-TLV.";
      list prefix-sid-sub-tlv {
        description
          "Prefix SID sub-TLV.";
        container ospfv3-prefix-sid-flags {
          leaf-list bits {
            type identityref {
              base prefix-sid-bit;
            }
            description
              "Prefix SID sub-TLV bits.";
          }
          description
            "Segment Identifier (SID) Flags.";
        }
        leaf algorithm {
          type identityref {
            base sr-cmn:prefix-sid-algorithm;
          }
          description
            "Algorithm associated with the prefix-SID.";
        }
        leaf sid {
          type uint32;
          description
            "Index or label.";
        }
      }
    }
  }

  grouping ospfv3-extended-prefix-range-tlvs {
    description
      "Extended prefix range TLV grouping.";
    reference
      "RFC 8666: OSPFv3 Extensions for Segment Routing
       (Section 5)";
    container ospfv3-extended-prefix-range-tlvs {
      description
        "List of extended prefix range TLVs.";
      list extended-prefix-range-tlv {
        description
          "Range of prefixes.";
        leaf prefix-length {
          type uint8;
          description
            "Length of prefix in bits.";
        }
        leaf af {
          type uint8;
          description
            "Address family for the prefix.";
        }
        leaf range-size {
          type uint16;
          description
            "Number of prefixes covered by the
             advertisement.";
        }
        leaf prefix {
          type inet:ip-prefix;
          description
            "Address prefix.";
        }
        uses ospfv3-prefix-sid-sub-tlvs;
        uses ospf:unknown-tlvs;
      }
    }
  }

  grouping ospfv3-adj-sid-sub-tlvs {
    description
      "Adj-SID sub-TLV grouping.";
    reference
      "RFC 8666: OSPFv3 Extensions for Segment Routing
       (Section 7)";
    container adj-sid-sub-tlvs {
      description
        "Adj-SID optional sub-TLVs.";
      list adj-sid-sub-tlv {
        description
          "List of Adj-SID sub-TLVs.";
        container adj-sid-flags {
          leaf-list bits {
            type identityref {
              base adj-sid-bit;
            }
            description
              "Adj-SID sub-tlv bits.";
          }
          description
            "Adj-sid sub-tlv flags.";
        }
        leaf weight {
          type uint8;
          description
            "Weight used for load-balancing.";
        }
        leaf sid {
          type uint32;
          description
            "Segment Identifier (SID) index/label.";
        }
      }
    }
  }

  grouping ospfv3-lan-adj-sid-sub-tlvs {
    description
      "LAN Adj-SID sub-TLV grouping.";
    reference
      "RFC 8666: OSPFv3 Extensions for Segment Routing
       (Section 7)";
    container lan-adj-sid-sub-tlvs {
      description
        "LAN Adj-SID optional sub-TLVs.";
      list lan-adj-sid-sub-tlv {
        description
          "List of LAN Adj-SID sub-TLVs.";
        container lan-adj-sid-flags {
          leaf-list bits {
            type identityref {
              base adj-sid-bit;
            }
            description
              "LAN Adj-SID sub-TLV bits.";
          }
          description
            "LAN Adj-SID sub-TLV flags.";
        }
        leaf weight {
          type uint8;
          description
            "Weight used for load-balancing.";
        }
        leaf neighbor-router-id {
          type rt-types:router-id;
          description
            "Neighbor router ID.";
        }
        leaf sid {
          type uint32;
          description
            "Segment Identifier (SID) index/label.";
        }
      }
    }
  }

  /* Configuration */

  augment "/rt:routing/rt:control-plane-protocols"
        + "/rt:control-plane-protocol/ospf:ospf" {
    when "derived-from(/rt:routing/rt:control-plane-protocols/"
       + "rt:control-plane-protocol/rt:type, 'ospf:ospf')" {
      description
        "This augments the OSPF routing protocol when used.";
    }
    description
      "This augments the OSPF protocol configuration
       with segment routing.";
    uses sr-mpls:sr-control-plane;
    container protocol-srgb {
      if-feature "sr-mpls:protocol-srgb";
      uses sr-cmn:srgb;
      description
        "Per-protocol SRGB.";
    }
  }

  augment "/rt:routing/rt:control-plane-protocols/"
        + "rt:control-plane-protocol/ospf:ospf/"
        + "ospf:areas/ospf:area/ospf:interfaces/ospf:interface" {
    when "derived-from(/rt:routing/rt:control-plane-protocols/"
       + "rt:control-plane-protocol/rt:type, 'ospf:ospf')" {
      description
        "This augments the OSPF interface configuration
         when used.";
    }
    description
      "This augments the OSPF protocol interface
       configuration with segment routing.";
    uses sr-mpls:igp-interface {
      augment "segment-routing/adjacency-sid/adj-sids" {
        when "((../../../ospf:interface-type = 'broadcast') or
              (../../../ospf:interface-type = 'non-broadcast'))" {
          description
            "This augments broadcast and non-broadcast multi-access
             interface.";
        }
        description
          "This augments LAN interface adj-sid with neighbor-id.";
        leaf neighbor-id {
          type inet:ip-address;
          description
            "Neighbor's Router ID, IPv4 address, or IPv6 address.";
        }
      }
    }
  }

  augment "/rt:routing/rt:control-plane-protocols/"
        + "rt:control-plane-protocol/ospf:ospf/"
        + "ospf:areas/ospf:area/ospf:interfaces/ospf:interface/"
        + "ospf:fast-reroute/ospf:lfa" {
    when "derived-from(/rt:routing/rt:control-plane-protocols/"
       + "rt:control-plane-protocol/rt:type, 'ospf:ospf')" {
      description
        "This augments the OSPF routing protocol when used.";
    }
    description
      "This augments the OSPF protocol IP-FRR with TI-LFA.";
    container ti-lfa {
      if-feature "ti-lfa";
      leaf enable {
        type boolean;
        description
          "Enable TI-LFA computation.";
      }
      container selection-tie-breakers {
        container node-protection {
          presence "Presence of container enables the node
                    protection tie-breaker";
          leaf priority {
            type uint8;
            default "128";
            description
              "Priority for node protection tie-breaker with
               a lower priority being more preferred.";
          }
          description
            "Enable node protection as a TI-LFA path
             selection tie-breaker. A path providing node
             protection will be selected over one that
             doesn't provide node protection.";
        }
        container srlg-disjoint {
          presence "Presence of container enables the SRLG
                    disjoint tie-breaker";
          leaf priority {
            type uint8;
            default "128";
            description
              "Priority for SRLG disjoint tie-breaker with
               a lower priority being more preferred.";
          }
          description
            "Enable SRLG (Shared Resource Link Group)
             disjoint  as a TI-LFA path selection tie-breaker.
             A path providing node a disjoint path for SRLG
             links from the primary path will be selected over
             one that doesn't provide an SRLG disjoint path.";
        }
        description
          "Configure path selection tie-breakers and their
           respective priorities for the TI-LFA computation.";
      }
      description
        "Topology-Independent Loop Free Alternate
         (TI-LFA) support.";
    }
  }

  augment "/rt:routing/rt:control-plane-protocols/"
        + "rt:control-plane-protocol/ospf:ospf/"
        + "ospf:areas/ospf:area/ospf:interfaces/ospf:interface/"
        + "ospf:fast-reroute/ospf:lfa/ospf:remote-lfa" {
    when "derived-from(/rt:routing/rt:control-plane-protocols/"
       + "rt:control-plane-protocol/rt:type, 'ospf:ospf')" {
      description
        "This augments the OSPF routing protocol when used.";
    }
    description
      "This augments the OSPF protocol IP-FRR with remote LFA.";
    leaf use-segment-routing-path {
      if-feature "remote-lfa-sr";
      type boolean;
      default "false";
      description
        "Force remote LFA to use segment routing path instead of LDP
         path. The value of this leaf is in effect only when
         remote-lfa is enabled.";
    }
  }

  /* Database */

  augment "/rt:routing/"
        + "rt:control-plane-protocols/rt:control-plane-protocol/"
        + "ospf:ospf/ospf:areas/ospf:area/"
        + "ospf:interfaces/ospf:interface/ospf:database/"
        + "ospf:link-scope-lsa-type/ospf:link-scope-lsas/"
        + "ospf:link-scope-lsa/ospf:version/ospf:ospfv2/"
        + "ospf:ospfv2/ospf:body/ospf:opaque/"
        + "ospf:extended-prefix-opaque" {
    when "derived-from(/rt:routing/rt:control-plane-protocols/"
       + "rt:control-plane-protocol/rt:type, 'ospf:ospfv2')" {
      description
        "This augmentation is only valid for OSPFv2.";
    }
    description
      "SR-specific TLVs for OSPFv2 extended prefix LSA
       in type 9 opaque LSA.";
    uses ospfv2-extended-prefix-range-tlvs;
  }

  augment "/rt:routing/"
        + "rt:control-plane-protocols/rt:control-plane-protocol/"
        + "ospf:ospf/ospf:areas/"
        + "ospf:area/ospf:database/"
        + "ospf:area-scope-lsa-type/ospf:area-scope-lsas/"
        + "ospf:area-scope-lsa/ospf:version/ospf:ospfv2/"
        + "ospf:ospfv2/ospf:body/ospf:opaque/"
        + "ospf:extended-prefix-opaque" {
    when "derived-from(/rt:routing/rt:control-plane-protocols/"
       + "rt:control-plane-protocol/rt:type, 'ospf:ospfv2')" {
      description
        "This augmentation is only valid for OSPFv2.";
    }
    description
      "SR-specific TLVs for OSPFv2 extended prefix LSA
       in type 10 opaque LSA.";
    uses ospfv2-extended-prefix-range-tlvs;
  }

  augment "/rt:routing/"
        + "rt:control-plane-protocols/rt:control-plane-protocol/"
        + "ospf:ospf/ospf:database/"
        + "ospf:as-scope-lsa-type/ospf:as-scope-lsas/"
        + "ospf:as-scope-lsa/ospf:version/ospf:ospfv2/"
        + "ospf:ospfv2/ospf:body/ospf:opaque/"
        + "ospf:extended-prefix-opaque" {
    when "derived-from(/rt:routing/rt:control-plane-protocols/"
       + "rt:control-plane-protocol/rt:type, 'ospf:ospfv2')" {
      description
        "This augmentation is only valid for OSPFv2.";
    }
    description
      "SR-specific TLVs for OSPFv2 extended prefix LSA
       in type 11 opaque LSA.";
    uses ospfv2-extended-prefix-range-tlvs;
  }

  augment "/rt:routing/"
        + "rt:control-plane-protocols/rt:control-plane-protocol/"
        + "ospf:ospf/ospf:areas/ospf:area/"
        + "ospf:interfaces/ospf:interface/ospf:database/"
        + "ospf:link-scope-lsa-type/ospf:link-scope-lsas/"
        + "ospf:link-scope-lsa/ospf:version/ospf:ospfv2/"
        + "ospf:ospfv2/ospf:body/ospf:opaque/"
        + "ospf:extended-prefix-opaque/ospf:extended-prefix-tlv" {
    when "derived-from(/rt:routing/rt:control-plane-protocols/"
       + "rt:control-plane-protocol/rt:type, 'ospf:ospfv2')" {
      description
        "This augmentation is only valid for OSPFv2.";
    }
    description
      "SR-specific TLVs for OSPFv2 extended prefix TLV
       in type 9 opaque LSA.";
    uses ospfv2-prefix-sid-sub-tlvs;
  }

  augment "/rt:routing/"
        + "rt:control-plane-protocols/rt:control-plane-protocol/"
        + "ospf:ospf/ospf:areas/"
        + "ospf:area/ospf:database/"
        + "ospf:area-scope-lsa-type/ospf:area-scope-lsas/"
        + "ospf:area-scope-lsa/ospf:version/ospf:ospfv2/"
        + "ospf:ospfv2/ospf:body/ospf:opaque/"
        + "ospf:extended-prefix-opaque/ospf:extended-prefix-tlv" {
    when "derived-from(/rt:routing/rt:control-plane-protocols/"
       + "rt:control-plane-protocol/rt:type, 'ospf:ospfv2')" {
      description
        "This augmentation is only valid for OSPFv2.";
    }
    description
      "SR-specific TLVs for OSPFv2 extended prefix TLV
       in type 10 opaque LSA.";
    uses ospfv2-prefix-sid-sub-tlvs;
  }

  augment "/rt:routing/"
        + "rt:control-plane-protocols/rt:control-plane-protocol/"
        + "ospf:ospf/ospf:database/"
        + "ospf:as-scope-lsa-type/ospf:as-scope-lsas/"
        + "ospf:as-scope-lsa/ospf:version/ospf:ospfv2/"
        + "ospf:ospfv2/ospf:body/ospf:opaque/"
        + "ospf:extended-prefix-opaque/ospf:extended-prefix-tlv" {
    when "derived-from(/rt:routing/rt:control-plane-protocols/"
       + "rt:control-plane-protocol/rt:type, 'ospf:ospfv2')" {
      description
        "This augmentation is only valid for OSPFv2.";
    }
    description
      "SR-specific TLVs for OSPFv2 extended prefix TLV
       in type 11 opaque LSA.";
    uses ospfv2-prefix-sid-sub-tlvs;
  }

  augment "/rt:routing/"
        + "rt:control-plane-protocols/rt:control-plane-protocol/"
        + "ospf:ospf/ospf:areas/"
        + "ospf:area/ospf:database/"
        + "ospf:area-scope-lsa-type/ospf:area-scope-lsas/"
        + "ospf:area-scope-lsa/ospf:version/ospf:ospfv2/"
        + "ospf:ospfv2/ospf:body/ospf:opaque/"
        + "ospf:extended-link-opaque/ospf:extended-link-tlv" {
    when "derived-from(/rt:routing/rt:control-plane-protocols/"
       + "rt:control-plane-protocol/rt:type, 'ospf:ospfv2')" {
      description
        "This augmentation is only valid for OSPFv2.";
    }
    description
      "SR-specific TLVs for OSPFv2 extended link TLV
       in type 10 opaque LSA.";
    container adj-sid-sub-tlvs {
      description
        "Adj-SID optional sub-TLVs.";
      list adj-sid-sub-tlv {
        description
          "List of Adj-SID sub-TLVs.";
        container adj-sid-flags {
          leaf-list bits {
            type identityref {
              base adj-sid-bit;
            }
            description
              "Adj-SID sub-TLV bits.";
          }
          description
            "Adj-sid sub-TLV flags.";
        }
        leaf mt-id {
          type uint8;
          description
            "Multi-topology ID.";
        }
        leaf weight {
          type uint8;
          description
            "Weight used for load-balancing.";
        }
        leaf sid {
          type uint32;
          description
            "Segment Identifier (SID) index/label.";
        }
      }
    }
    container lan-adj-sid-sub-tlvs {
      description
        "LAN Adj-SID optional sub-TLVs.";
      list lan-adj-sid-sub-tlv {
        description
          "List of LAN Adj-SID sub-TLVs.";
        container lan-adj-sid-flags {
          leaf-list bits {
            type identityref {
              base adj-sid-bit;
            }
            description
              "LAN Adj-SID sub-TLV bits.";
          }
          description
            "LAN Adj-SID sub-TLV flags.";
        }
        leaf mt-id {
          type uint8;
          description
            "Multi-topology ID.";
        }
        leaf weight {
          type uint8;
          description
            "Weight used for load-balancing.";
        }
        leaf neighbor-router-id {
          type rt-types:router-id;
          description
            "Neighbor router ID.";
        }
        leaf sid {
          type uint32;
          description
            "Segment Identifier (SID) index/label.";
        }
      }
    }
  }

  augment "/rt:routing/"
        + "rt:control-plane-protocols/rt:control-plane-protocol/"
        + "ospf:ospf/ospf:areas/ospf:area/"
        + "ospf:interfaces/ospf:interface/ospf:database/"
        + "ospf:link-scope-lsa-type/ospf:link-scope-lsas/"
        + "ospf:link-scope-lsa/ospf:version/ospf:ospfv2/"
        + "ospf:ospfv2/ospf:body/ospf:opaque/ospf:ri-opaque" {
    when "derived-from(/rt:routing/rt:control-plane-protocols/"
       + "rt:control-plane-protocol/rt:type, 'ospf:ospfv2')" {
      description
        "This augmentation is only valid for OSPFv2.";
    }
    description
      "SR-specific TLVs for OSPFv2 type 9 opaque LSA.";
    uses sr-algorithm-tlv;
    uses sid-range-tlvs;
    uses local-block-tlvs;
    uses srms-preference-tlv;
  }

  augment "/rt:routing/"
        + "rt:control-plane-protocols/rt:control-plane-protocol/"
        + "ospf:ospf/ospf:areas/"
        + "ospf:area/ospf:database/"
        + "ospf:area-scope-lsa-type/ospf:area-scope-lsas/"
        + "ospf:area-scope-lsa/ospf:version/ospf:ospfv2/"
        + "ospf:ospfv2/ospf:body/ospf:opaque/ospf:ri-opaque" {
    when "derived-from(/rt:routing/rt:control-plane-protocols/"
       + "rt:control-plane-protocol/rt:type, 'ospf:ospfv2')" {
      description
        "This augmentation is only valid for OSPFv2.";
    }
    description
      "SR-specific TLVs for OSPFv2 type 10 opaque LSA.";
    uses sr-algorithm-tlv;
    uses sid-range-tlvs;
    uses local-block-tlvs;
    uses srms-preference-tlv;
  }

  augment "/rt:routing/"
        + "rt:control-plane-protocols/rt:control-plane-protocol/"
        + "ospf:ospf/ospf:database/"
        + "ospf:as-scope-lsa-type/ospf:as-scope-lsas/"
        + "ospf:as-scope-lsa/ospf:version/ospf:ospfv2/"
        + "ospf:ospfv2/ospf:body/ospf:opaque/ospf:ri-opaque" {
    when "derived-from(/rt:routing/rt:control-plane-protocols/"
       + "rt:control-plane-protocol/rt:type, 'ospf:ospfv2')" {
      description
        "This augmentation is only valid for OSPFv2.";
    }
    description
      "SR-specific TLVs for OSPFv2 type 11 opaque LSA.";
    uses sr-algorithm-tlv;
    uses sid-range-tlvs;
    uses local-block-tlvs;
    uses srms-preference-tlv;
  }

  /* Segment Routing Capabilities */

  augment "/rt:routing/"
        + "rt:control-plane-protocols/rt:control-plane-protocol/"
        + "ospf:ospf/ospf:database/"
        + "ospf:as-scope-lsa-type/ospf:as-scope-lsas/"
        + "ospf:as-scope-lsa/ospf:version/ospf:ospfv3/"
        + "ospf:ospfv3/ospf:body/ospf:router-information" {
    when "derived-from(/rt:routing/rt:control-plane-protocols/"
       + "rt:control-plane-protocol/rt:type, 'ospf:ospfv3')" {
      description
        "This augmentation is only valid for OSPFv3.";
    }
    description
      "SR-specific TLVs for OSPFv3 Router Information
       opaque LSA.";
    uses sr-algorithm-tlv;
    uses sid-range-tlvs;
    uses local-block-tlvs;
    uses srms-preference-tlv;
  }

  augment "/rt:routing/"
        + "rt:control-plane-protocols/rt:control-plane-protocol/"
        + "ospf:ospf/ospf:areas/"
        + "ospf:area/ospf:database/"
        + "ospf:area-scope-lsa-type/ospf:area-scope-lsas/"
        + "ospf:area-scope-lsa/ospf:version/ospf:ospfv3/"
        + "ospf:ospfv3/ospf:body/ospf:router-information" {
    when "derived-from(/rt:routing/rt:control-plane-protocols/"
       + "rt:control-plane-protocol/rt:type, 'ospf:ospfv3')" {
      description
        "This augmentation is only valid for OSPFv3.";
    }
    description
      "SR-specific TLVs for OSPFv3 Router Information LSA.";
    uses sr-algorithm-tlv;
    uses sid-range-tlvs;
    uses local-block-tlvs;
    uses srms-preference-tlv;
  }

  augment "/rt:routing/"
        + "rt:control-plane-protocols/rt:control-plane-protocol/"
        + "ospf:ospf/ospf:areas/ospf:area/"
        + "ospf:interfaces/ospf:interface/ospf:database/"
        + "ospf:link-scope-lsa-type/ospf:link-scope-lsas/"
        + "ospf:link-scope-lsa/ospf:version/ospf:ospfv3/"
        + "ospf:ospfv3/ospf:body/ospf:router-information" {
    when "derived-from(/rt:routing/rt:control-plane-protocols/"
       + "rt:control-plane-protocol/rt:type, 'ospf:ospfv3')" {
      description
        "This augmentation is only valid for OSPFv3.";
    }
    description
      "SR-specific TLVs for OSPFv3 Router Information LSA.";
    uses sr-algorithm-tlv;
    uses sid-range-tlvs;
    uses local-block-tlvs;
    uses srms-preference-tlv;
  }

  /* OSPFv3 Extended Prefix Range TLV */

  augment "/rt:routing/"
        + "rt:control-plane-protocols/rt:control-plane-protocol/"
        + "ospf:ospf/ospf:areas/ospf:area/ospf:database/"
        + "ospf:area-scope-lsa-type/ospf:area-scope-lsas/"
        + "ospf:area-scope-lsa/ospf:version/ospf:ospfv3/"
        + "ospf:ospfv3/ospf:body/ospfv3-e-lsa:e-intra-area-prefix" {
    when "derived-from(/rt:routing/rt:control-plane-protocols/"
       + "rt:control-plane-protocol/rt:type, 'ospf:ospfv3')" {
      description
        "This augmentation is only valid for OSPFv3
         E-Router LSAs";
    }
    uses ospfv3-extended-prefix-range-tlvs;
    description
      "OSPFv3 Area-Scoped E-Intra-Area-Prefix LSA.";
  }

  augment "/rt:routing/"
        + "rt:control-plane-protocols/rt:control-plane-protocol/"
        + "ospf:ospf/ospf:areas/ospf:area/ospf:database/"
        + "ospf:area-scope-lsa-type/ospf:area-scope-lsas/"
        + "ospf:area-scope-lsa/ospf:version/ospf:ospfv3/"
        + "ospf:ospfv3/ospf:body/ospfv3-e-lsa:e-inter-area-prefix" {
    when "derived-from(/rt:routing/rt:control-plane-protocols/"
       + "rt:control-plane-protocol/rt:type, 'ospf:ospfv3')" {
      description
        "This augmentation is only valid for OSPFv3
         E-Router LSAs";
    }
    uses ospfv3-extended-prefix-range-tlvs;
    description
      "OSPFv3 Area-Scoped E-Inter-Area-Prefix LSA.";
  }

  augment "/rt:routing/"
        + "rt:control-plane-protocols/rt:control-plane-protocol/"
        + "ospf:ospf/ospf:database/"
        + "ospf:as-scope-lsa-type/ospf:as-scope-lsas/"
        + "ospf:as-scope-lsa/ospf:version/ospf:ospfv3/"
        + "ospf:ospfv3/ospf:body/ospfv3-e-lsa:e-as-external" {
    when "derived-from(/rt:routing/rt:control-plane-protocols/"
       + "rt:control-plane-protocol/rt:type, 'ospf:ospfv3')" {
      description
        "This augmentation is only valid for OSPFv3.";
    }
    uses ospfv3-extended-prefix-range-tlvs;
    description
      "OSPFv3 AS-Scoped E-AS-External LSA.";
  }

  augment "/rt:routing/"
        + "rt:control-plane-protocols/rt:control-plane-protocol/"
        + "ospf:ospf/ospf:areas/ospf:area/ospf:database/"
        + "ospf:area-scope-lsa-type/ospf:area-scope-lsas/"
        + "ospf:area-scope-lsa/ospf:version/ospf:ospfv3/"
        + "ospf:ospfv3/ospf:body/ospfv3-e-lsa:e-nssa" {
    when "derived-from(/rt:routing/rt:control-plane-protocols/"
       + "rt:control-plane-protocol/rt:type, 'ospf:ospfv3')" {
      description
        "This augmentation is only valid for OSPFv3.";
    }
    uses ospfv3-extended-prefix-range-tlvs;
    description
      "OSPFv3 Area-Scoped E-NSSA LSA.";
  }

  /* Prefix SID Sub-TLV in Intra-Area Prefix TLV */

  augment "/rt:routing/"
        + "rt:control-plane-protocols/rt:control-plane-protocol/"
        + "ospf:ospf/ospf:areas/ospf:area/ospf:interfaces/"
        + "ospf:interface/"
        + "ospf:database/ospf:link-scope-lsa-type/"
        + "ospf:link-scope-lsas/ospf:link-scope-lsa/"
        + "ospf:version/ospf:ospfv3/ospf:ospfv3/"
        + "ospf:body/ospfv3-e-lsa:e-link/"
        + "ospfv3-e-lsa:e-link-tlvs/ospfv3-e-lsa:intra-prefix-tlv" {
    when "derived-from(/rt:routing/rt:control-plane-protocols/"
       + "rt:control-plane-protocol/rt:type, 'ospf:ospfv3')" {
      description
        "This augmentation is only valid for OSPFv3
         E-Router LSAs";
    }
    uses ospfv3-prefix-sid-sub-tlvs;
    description
      "OSPFv3 Link-Scoped Intra-Area Prefix TLV.";
  }

  augment "/rt:routing/"
        + "rt:control-plane-protocols/rt:control-plane-protocol/"
        + "ospf:ospf/ospf:areas/ospf:area/ospf:database/"
        + "ospf:area-scope-lsa-type/ospf:area-scope-lsas/"
        + "ospf:area-scope-lsa/ospf:version/ospf:ospfv3/"
        + "ospf:ospfv3/ospf:body/ospfv3-e-lsa:e-intra-area-prefix/"
        + "ospfv3-e-lsa:e-intra-prefix-tlvs/"
        + "ospfv3-e-lsa:intra-prefix-tlv" {
    when "derived-from(/rt:routing/rt:control-plane-protocols/"
       + "rt:control-plane-protocol/rt:type, 'ospf:ospfv3')" {
      description
        "This augmentation is only valid for OSPFv3
         E-Router LSAs";
    }
    uses ospfv3-prefix-sid-sub-tlvs;
    description
      "OSPFv3 Area-Scoped Intra-Area Prefix TLV.";
  }

  /* Prefix SID Sub-TLV in Inter-Area Prefix TLV */

  augment "/rt:routing/"
        + "rt:control-plane-protocols/rt:control-plane-protocol/"
        + "ospf:ospf/ospf:areas/ospf:area/ospf:database/"
        + "ospf:area-scope-lsa-type/ospf:area-scope-lsas/"
        + "ospf:area-scope-lsa/ospf:version/ospf:ospfv3/"
        + "ospf:ospfv3/ospf:body/ospfv3-e-lsa:e-inter-area-prefix/"
        + "ospfv3-e-lsa:e-inter-prefix-tlvs/"
        + "ospfv3-e-lsa:inter-prefix-tlv" {
    when "derived-from(/rt:routing/rt:control-plane-protocols/"
       + "rt:control-plane-protocol/rt:type, 'ospf:ospfv3')" {
      description
        "This augmentation is only valid for OSPFv3
         E-Router LSAs";
    }
    uses ospfv3-prefix-sid-sub-tlvs;
    description
      "OSPFv3 Area-Scoped Inter-Area Prefix TLV.";
  }

  /* Prefix SID Sub-TLV in External Prefix TLV */

  augment "/rt:routing/"
        + "rt:control-plane-protocols/rt:control-plane-protocol/"
        + "ospf:ospf/ospf:database/"
        + "ospf:as-scope-lsa-type/ospf:as-scope-lsas/"
        + "ospf:as-scope-lsa/ospf:version/ospf:ospfv3/"
        + "ospf:ospfv3/ospf:body/ospfv3-e-lsa:e-as-external/"
        + "ospfv3-e-lsa:e-external-tlvs/"
        + "ospfv3-e-lsa:external-prefix-tlv" {
    when "derived-from(/rt:routing/rt:control-plane-protocols/"
       + "rt:control-plane-protocol/rt:type, 'ospf:ospfv3')" {
      description
        "This augmentation is only valid for OSPFv3.";
    }
    uses ospfv3-prefix-sid-sub-tlvs;
    description
      "OSPFv3 AS-Scoped External Prefix TLV.";
  }

  augment "/rt:routing/"
        + "rt:control-plane-protocols/rt:control-plane-protocol/"
        + "ospf:ospf/ospf:areas/ospf:area/ospf:database/"
        + "ospf:area-scope-lsa-type/ospf:area-scope-lsas/"
        + "ospf:area-scope-lsa/ospf:version/ospf:ospfv3/"
        + "ospf:ospfv3/ospf:body/ospfv3-e-lsa:e-nssa/"
        + "ospfv3-e-lsa:e-external-tlvs/"
        + "ospfv3-e-lsa:external-prefix-tlv" {
    when "derived-from(/rt:routing/rt:control-plane-protocols/"
       + "rt:control-plane-protocol/rt:type, 'ospf:ospfv3')" {
      description
        "This augmentation is only valid for OSPFv3.";
    }
    uses ospfv3-prefix-sid-sub-tlvs;
    description
      "OSPFv3 Area-Scoped External Prefix TLV.";
  }

  /* Adj-SID sub-TLV */

  augment "/rt:routing/"
        + "rt:control-plane-protocols/rt:control-plane-protocol/"
        + "ospf:ospf/ospf:areas/ospf:area/ospf:database/"
        + "ospf:area-scope-lsa-type/ospf:area-scope-lsas/"
        + "ospf:area-scope-lsa/ospf:version/ospf:ospfv3/"
        + "ospf:ospfv3/ospf:body/ospfv3-e-lsa:e-router/"
        + "ospfv3-e-lsa:e-router-tlvs/ospfv3-e-lsa:link-tlv" {
    when "derived-from(/rt:routing/rt:control-plane-protocols/"
       + "rt:control-plane-protocol/rt:type, 'ospf:ospfv3')" {
      description
        "This augmentation is only valid for OSPFv3
         E-Router LSAs";
    }
    uses ospfv3-adj-sid-sub-tlvs;
    uses ospfv3-lan-adj-sid-sub-tlvs;
    description
      "OSPFv3 Area-Scoped Adj-SID Sub-TLV.";
  }
}
<CODE ENDS>
Figure 1

3. Security Considerations

The YANG module specified in this document define a schema for data that is designed to be accessed via network management protocols such as NETCONF [RFC6241] or RESTCONF [RFC8040]. The lowest NETCONF layer is the secure transport layer, and the mandatory-to-implement secure transport is Secure Shell (SSH) [RFC6242]. The lowest RESTCONF layer is HTTPS, and the mandatory-to-implement secure transport is TLS [RFC8446].

The NETCONF Configuration Access Control model (NACM) [RFC8341] provides the means to restrict access for particular NETCONF or RESTCONF users to a pre-configured subset of all available NETCONF or RESTCONF protocol operations and content.

There are a number of data nodes defined in the module that are writable/creatable/deletable (i.e., config true, which is the default). These data nodes may be considered sensitive or vulnerable in some network environments. Write operations (e.g., edit-config) to these data nodes without proper protection can have a negative effect on network operations. These are the subtrees and data nodes and their sensitivity/vulnerability:

Some of the readable data nodes in the module may be considered sensitive or vulnerable in some network environments. It is thus important to control read access (e.g., via get, get-config, or notification) to these data nodes.

The module ietf-ospf-sr-mpls augments base OSPF module data base with various TLVs. Knowledge of these data nodes can be used to attack other routers in the OSPF domain.

4. Acknowledgements

The authors wish to thank Yi Yang, Alexander Clemm, Gaurav Gupta, Ladislav Lhotka, Stephane Litkowski, Greg Hankins, Manish Gupta, Alan Davey, Divakaran Baskaran, and Tom Petch for their thorough reviews and helpful comments.

The authors wish to thank Julien Meuric for a very meticulous Routing Directorate review.

Author affiliation with The MITRE Corporation is provided for identification purposes only, and is not intended to convey or imply MITRE's concurrence with, or support for, the positions, opinions or viewpoints expressed. MITRE has approved this document for Public Release, Distribution Unlimited, with Public Release Case Number 18-3281.

5. IANA Considerations

This document registers a URI in the IETF XML registry [RFC3688]. Following the format in [RFC3688], the following registration is requested to be made:

      URI: urn:ietf:params:xml:ns:yang:ietf-ospf-sr-mpls
      Registrant Contact: The IESG.
      XML: N/A, the requested URI is an XML namespace.

This document registers a YANG module in the YANG Module Names registry [RFC6020].

      name: ietf-ospf-sr-mpls
      namespace: urn:ietf:params:xml:ns:yang:ietf-ospf-sr-mpls
      prefix: ospf-sr-mpls
      reference: RFC XXXX

6. References

6.1. Normative References

[I-D.ietf-rtgwg-segment-routing-ti-lfa]
Litkowski, S., Bashandy, A., Filsfils, C., Francois, P., Decraene, B., and D. Voyer, "Topology Independent Fast Reroute using Segment Routing", Work in Progress, Internet-Draft, draft-ietf-rtgwg-segment-routing-ti-lfa-12, , <https://datatracker.ietf.org/doc/html/draft-ietf-rtgwg-segment-routing-ti-lfa-12>.
[RFC2119]
Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, , <https://www.rfc-editor.org/info/rfc2119>.
[RFC2328]
Moy, J., "OSPF Version 2", STD 54, RFC 2328, DOI 10.17487/RFC2328, , <https://www.rfc-editor.org/info/rfc2328>.
[RFC3688]
Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, DOI 10.17487/RFC3688, , <https://www.rfc-editor.org/info/rfc3688>.
[RFC4750]
Joyal, D., Ed., Galecki, P., Ed., Giacalone, S., Ed., Coltun, R., and F. Baker, "OSPF Version 2 Management Information Base", RFC 4750, DOI 10.17487/RFC4750, , <https://www.rfc-editor.org/info/rfc4750>.
[RFC5340]
Coltun, R., Ferguson, D., Moy, J., and A. Lindem, "OSPF for IPv6", RFC 5340, DOI 10.17487/RFC5340, , <https://www.rfc-editor.org/info/rfc5340>.
[RFC5643]
Joyal, D., Ed. and V. Manral, Ed., "Management Information Base for OSPFv3", RFC 5643, DOI 10.17487/RFC5643, , <https://www.rfc-editor.org/info/rfc5643>.
[RFC5838]
Lindem, A., Ed., Mirtorabi, S., Roy, A., Barnes, M., and R. Aggarwal, "Support of Address Families in OSPFv3", RFC 5838, DOI 10.17487/RFC5838, , <https://www.rfc-editor.org/info/rfc5838>.
[RFC6020]
Bjorklund, M., Ed., "YANG - A Data Modeling Language for the Network Configuration Protocol (NETCONF)", RFC 6020, DOI 10.17487/RFC6020, , <https://www.rfc-editor.org/info/rfc6020>.
[RFC6241]
Enns, R., Ed., Bjorklund, M., Ed., Schoenwaelder, J., Ed., and A. Bierman, Ed., "Network Configuration Protocol (NETCONF)", RFC 6241, DOI 10.17487/RFC6241, , <https://www.rfc-editor.org/info/rfc6241>.
[RFC6242]
Wasserman, M., "Using the NETCONF Protocol over Secure Shell (SSH)", RFC 6242, DOI 10.17487/RFC6242, , <https://www.rfc-editor.org/info/rfc6242>.
[RFC6991]
Schoenwaelder, J., Ed., "Common YANG Data Types", RFC 6991, DOI 10.17487/RFC6991, , <https://www.rfc-editor.org/info/rfc6991>.
[RFC7950]
Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language", RFC 7950, DOI 10.17487/RFC7950, , <https://www.rfc-editor.org/info/rfc7950>.
[RFC8040]
Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF Protocol", RFC 8040, DOI 10.17487/RFC8040, , <https://www.rfc-editor.org/info/rfc8040>.
[RFC8102]
Sarkar, P., Ed., Hegde, S., Bowers, C., Gredler, H., and S. Litkowski, "Remote-LFA Node Protection and Manageability", RFC 8102, DOI 10.17487/RFC8102, , <https://www.rfc-editor.org/info/rfc8102>.
[RFC8294]
Liu, X., Qu, Y., Lindem, A., Hopps, C., and L. Berger, "Common YANG Data Types for the Routing Area", RFC 8294, DOI 10.17487/RFC8294, , <https://www.rfc-editor.org/info/rfc8294>.
[RFC8341]
Bierman, A. and M. Bjorklund, "Network Configuration Access Control Model", STD 91, RFC 8341, DOI 10.17487/RFC8341, , <https://www.rfc-editor.org/info/rfc8341>.
[RFC8343]
Bjorklund, M., "A YANG Data Model for Interface Management", RFC 8343, DOI 10.17487/RFC8343, , <https://www.rfc-editor.org/info/rfc8343>.
[RFC8349]
Lhotka, L., Lindem, A., and Y. Qu, "A YANG Data Model for Routing Management (NMDA Version)", RFC 8349, DOI 10.17487/RFC8349, , <https://www.rfc-editor.org/info/rfc8349>.
[RFC8446]
Rescorla, E., "The Transport Layer Security (TLS) Protocol Version 1.3", RFC 8446, DOI 10.17487/RFC8446, , <https://www.rfc-editor.org/info/rfc8446>.
[RFC8476]
Tantsura, J., Chunduri, U., Aldrin, S., and P. Psenak, "Signaling Maximum SID Depth (MSD) Using OSPF", RFC 8476, DOI 10.17487/RFC8476, , <https://www.rfc-editor.org/info/rfc8476>.
[RFC8665]
Psenak, P., Ed., Previdi, S., Ed., Filsfils, C., Gredler, H., Shakir, R., Henderickx, W., and J. Tantsura, "OSPF Extensions for Segment Routing", RFC 8665, DOI 10.17487/RFC8665, , <https://www.rfc-editor.org/info/rfc8665>.
[RFC8666]
Psenak, P., Ed. and S. Previdi, Ed., "OSPFv3 Extensions for Segment Routing", RFC 8666, DOI 10.17487/RFC8666, , <https://www.rfc-editor.org/info/rfc8666>.
[RFC9020]
Litkowski, S., Qu, Y., Lindem, A., Sarkar, P., and J. Tantsura, "YANG Data Model for Segment Routing", RFC 9020, DOI 10.17487/RFC9020, , <https://www.rfc-editor.org/info/rfc9020>.
[RFC9129]
Yeung, D., Qu, Y., Zhang, Z., Chen, I., and A. Lindem, "YANG Data Model for the OSPF Protocol", RFC 9129, DOI 10.17487/RFC9129, , <https://www.rfc-editor.org/info/rfc9129>.

6.2. Informative References

[RFC8340]
Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams", BCP 215, RFC 8340, DOI 10.17487/RFC8340, , <https://www.rfc-editor.org/info/rfc8340>.
[RFC8342]
Bjorklund, M., Schoenwaelder, J., Shafer, P., Watsen, K., and R. Wilton, "Network Management Datastore Architecture (NMDA)", RFC 8342, DOI 10.17487/RFC8342, , <https://www.rfc-editor.org/info/rfc8342>.
[RFC8792]
Watsen, K., Auerswald, E., Farrel, A., and Q. Wu, "Handling Long Lines in Content of Internet-Drafts and RFCs", RFC 8792, DOI 10.17487/RFC8792, , <https://www.rfc-editor.org/info/rfc8792>.

Appendix A. A Configuration Example

The following is an XML example using the OSPF SR YANG module, and RFC 9020.

Note: '\' line wrapping per [RFC8792].

<?xml version='1.0' encoding='UTF-8'?>
  <routing xmlns="urn:ietf:params:xml:ns:yang:ietf-routing">
    <router-id>1.1.1.1</router-id>
    <control-plane-protocols>
      <control-plane-protocol>
        <type xmlns:ospf="urn:ietf:params:xml:ns:yang:ietf-ospf">\
          ospf:ospfv2</type>
        <name>OSPFv2</name>
        <ospf xmlns="urn:ietf:params:xml:ns:yang:ietf-ospf">
          <areas>
            <area>
              <area-id>0.0.0.0</area-id>
              <interfaces>
                <interface>
                  <name>eth0</name>
                  <segment-routing xmlns="urn:ietf:params:xml:ns\
                    :yang:ietf-ospf-sr-mpls">
                    <adjacency-sid>
                      <adj-sids>
                        <value>3888</value>
                      </adj-sids>
                    </adjacency-sid>
                  </segment-routing>
                </interface>
              </interfaces>
            </area>
          </areas>
          <segment-routing xmlns="urn:ietf:params:xml:ns:yang:\
            ietf-ospf-sr-mpls">
            <enabled>true</enabled>
          </segment-routing>
          <protocol-srgb xmlns="urn:ietf:params:xml:ns:yang:\
            ietf-ospf-sr-mpls">
            <srgb>
              <lower-bound>4000</lower-bound>
              <upper-bound>5000</upper-bound>
            </srgb>
          </protocol-srgb>
        </ospf>
      </control-plane-protocol>
    </control-plane-protocols>
  </routing>

The following is the same example using JSON format.

{
  "routing": {
    "router-id": "1.1.1.1",
    "control-plane-protocols": {
      "control-plane-protocol": {
        "type": "ospf:ospfv2",
        "name": "OSPFv2",
        "ospf": {
          "areas": {
            "area": {
              "area-id": "0.0.0.0",
              "interfaces": {
                "interface": {
                  "name": "eth0",
                  "segment-routing": {
                    "adjacency-sid": {
                      "adj-sids": {
                        "value": 3888
                      }
                    }
                  }
                }
              }
            }
          },
          "segment-routing": {
            "enabled": true
          },
          "protocol-srgb": {
            "srgb": {
              "lower-bound": 4000,
              "upper-bound": 5000
            }
          }
        }
      }
    }
  }
}

Appendix B. Contributors' Addreses 


Dean Bogdanovic
Alef

EMail: ivandean@gmail.com


Kiran Koushik Agrahara Sreenivasa
Verizon Wireless
Austin, TX  78681
USA

EMail: KiranKoushik.AgraharaSreenivasa@verisonwireless.com

Authors' Addresses

Yingzhen Qu
Futurewei Technologies
2330 Central Expressway
Santa Clara, CA 95050
United States of America
Acee Lindem
LabN Consulting, L.L.C.
301 Midenhall Way
Cary, NC 27513
Jeffrey Zhang
Juniper Networks
10 Technology Park Drive
Westford, MA 01886
United States of America
Ing-Wher Chen
The MITRE Corporation