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Versions: 00

Internet                                                       A. Lindem
Internet-Draft                                             Cisco Systems
Intended status: Informational                                     Y. Qu
Expires: February 14, 2020                                     Futurewei
                                                         August 13, 2019


               YANG Data Model for OSPFv3 Segment Routing
                    draft-acee-lsr-ospfv3-sr-yang-00

Abstract

   This document defines a YANG data module augmenting the IETF OSPF
   Segment Routing (SR) YANG model to support OSPFv3 extensions for SR.
   It can be used to configure and manage OSPFv3 Segment Routing in MPLS
   dataplane.

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 February 14, 2020.

Copyright Notice

   Copyright (c) 2019 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
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.



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Table of Contents

   1.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   2
   2.  Tree Diagrams . . . . . . . . . . . . . . . . . . . . . . . .   2
   3.  OSPFv3 Extensions for Segment Routing . . . . . . . . . . . .   3
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .  24
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  24
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  25
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  25
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .  25
     7.2.  Informative References  . . . . . . . . . . . . . . . . .  26
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  26

1.  Overview

   YANG [RFC6020] [RFC7950] is a data definition language used to define
   the contents of a conceptual data store that allows networked devices
   to be managed using NETCONF [RFC6241].  YANG is proving relevant
   beyond its initial confines, as bindings to other interfaces (e.g.,
   ReST) and encodings other than XML (e.g., JSON) are being defined.
   Furthermore, YANG data models can be used as the basis for
   implementation of other interfaces, such as CLI and programmatic
   APIs.

   This document defines a YANG data module augmenting the IETF OSPF SR
   YANG model [I-D.ietf-ospf-sr-yang], and can be used to configure and
   manage OSPFv3 extensions for Segment Routing
   [I-D.ietf-ospf-ospfv3-segment-routing-extensions].

   The augmentation defined in this document requires support for both
   the OSPF SR model and the OSPF base model[I-D.ietf-ospf-yang].

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].

2.  Tree Diagrams

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








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3.  OSPFv3 Extensions for Segment Routing

   This document defines a YANG module for OSPFv3 extensions for Segment
   Routing [I-D.ietf-ospf-ospfv3-segment-routing-extensions].  It is an
   augmentation of the OSPF SR base model.

  module: ietf-ospfv3-sr
    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*   uint8
      +--ro sid-range-tlvs
      |  +--ro sid-range-tlv*
      |     +--ro range-size?    uint24
      |     +--ro sid-sub-tlv
      |        +--ro sid?   uint32
      +--ro local-block-tlvs
      |  +--ro local-block-tlv*
      |     +--ro range-size?    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*   uint8
      +--ro sid-range-tlvs
      |  +--ro sid-range-tlv*
      |     +--ro range-size?    uint24
      |     +--ro sid-sub-tlv
      |        +--ro sid?   uint32
      +--ro local-block-tlvs
      |  +--ro local-block-tlv*
      |     +--ro range-size?    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



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            /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*   uint8
      +--ro sid-range-tlvs
      |  +--ro sid-range-tlv*
      |     +--ro range-size?    uint24
      |     +--ro sid-sub-tlv
      |        +--ro sid?   uint32
      +--ro local-block-tlvs
      |  +--ro local-block-tlv*
      |     +--ro range-size?    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 perfix-sid-sub-tlvs
            |  +--ro prefix-sid-sub-tlv*
            |     +--ro ospfv3-prefix-sid-flags
            |     |  +--ro bits*   identityref
            |     +--ro algorithm?                 uint8
            |     +--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-intra-area-prefix:
      +--ro ospfv3-extended-prefix-range-tlvs
         +--ro extended-prefix-range-tlv*
            +--ro prefix-length?         uint8
            +--ro af?                    uint8



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            +--ro range-size?            uint16
            +--ro prefix?                inet:ip-prefix
            +--ro perfix-sid-sub-tlvs
            |  +--ro prefix-sid-sub-tlv*
            |     +--ro ospfv3-prefix-sid-flags
            |     |  +--ro bits*   identityref
            |     +--ro algorithm?                 uint8
            |     +--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 perfix-sid-sub-tlvs
            |  +--ro prefix-sid-sub-tlv*
            |     +--ro ospfv3-prefix-sid-flags
            |     |  +--ro bits*   identityref
            |     +--ro algorithm?                 uint8
            |     +--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-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 perfix-sid-sub-tlvs
            |  +--ro prefix-sid-sub-tlv*



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            |     +--ro ospfv3-prefix-sid-flags
            |     |  +--ro bits*   identityref
            |     +--ro algorithm?                 uint8
            |     +--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-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 perfix-sid-sub-tlvs
            |  +--ro prefix-sid-sub-tlv*
            |     +--ro ospfv3-prefix-sid-flags
            |     |  +--ro bits*   identityref
            |     +--ro algorithm?                 uint8
            |     +--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 perfix-sid-sub-tlvs
            |  +--ro prefix-sid-sub-tlv*
            |     +--ro ospfv3-prefix-sid-flags
            |     |  +--ro bits*   identityref
            |     +--ro algorithm?                 uint8
            |     +--ro sid?                       uint32



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            +--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 perfix-sid-sub-tlvs
            |  +--ro prefix-sid-sub-tlv*
            |     +--ro ospfv3-prefix-sid-flags
            |     |  +--ro bits*   identityref
            |     +--ro algorithm?                 uint8
            |     +--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-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 perfix-sid-sub-tlvs
            |  +--ro prefix-sid-sub-tlv*
            |     +--ro ospfv3-prefix-sid-flags
            |     |  +--ro bits*   identityref
            |     +--ro algorithm?                 uint8
            |     +--ro sid?                       uint32
            +--ro unknown-tlvs
               +--ro unknown-tlv*
                  +--ro type?     uint16
                  +--ro length?   uint16



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                  +--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-link/ospfv3-e-lsa:e-link-tlvs
            /ospfv3-e-lsa:intra-prefix-tlv:
      +--ro perfix-sid-sub-tlvs
         +--ro prefix-sid-sub-tlv*
            +--ro ospfv3-prefix-sid-flags
            |  +--ro bits*   identityref
            +--ro algorithm?                 uint8
            +--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-link/ospfv3-e-lsa:e-link-tlvs
            /ospfv3-e-lsa:intra-prefix-tlv:
      +--ro perfix-sid-sub-tlvs
         +--ro prefix-sid-sub-tlv*
            +--ro ospfv3-prefix-sid-flags
            |  +--ro bits*   identityref
            +--ro algorithm?                 uint8
            +--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 perfix-sid-sub-tlvs
         +--ro prefix-sid-sub-tlv*
            +--ro ospfv3-prefix-sid-flags
            |  +--ro bits*   identityref
            +--ro algorithm?                 uint8
            +--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-intra-area-prefix
            /ospfv3-e-lsa:e-intra-prefix-tlvs
            /ospfv3-e-lsa:intra-prefix-tlv:
      +--ro perfix-sid-sub-tlvs
         +--ro prefix-sid-sub-tlv*
            +--ro ospfv3-prefix-sid-flags



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            |  +--ro bits*   identityref
            +--ro algorithm?                 uint8
            +--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 perfix-sid-sub-tlvs
         +--ro prefix-sid-sub-tlv*
            +--ro ospfv3-prefix-sid-flags
            |  +--ro bits*   identityref
            +--ro algorithm?                 uint8
            +--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-inter-area-prefix
            /ospfv3-e-lsa:e-inter-prefix-tlvs
            /ospfv3-e-lsa:inter-prefix-tlv:
      +--ro perfix-sid-sub-tlvs
         +--ro prefix-sid-sub-tlv*
            +--ro ospfv3-prefix-sid-flags
            |  +--ro bits*   identityref
            +--ro algorithm?                 uint8
            +--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-as-external
            /ospfv3-e-lsa:e-external-tlvs
            /ospfv3-e-lsa:external-prefix-tlv:
      +--ro perfix-sid-sub-tlvs
         +--ro prefix-sid-sub-tlv*
            +--ro ospfv3-prefix-sid-flags
            |  +--ro bits*   identityref
            +--ro algorithm?                 uint8
            +--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:



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      +--ro perfix-sid-sub-tlvs
         +--ro prefix-sid-sub-tlv*
            +--ro ospfv3-prefix-sid-flags
            |  +--ro bits*   identityref
            +--ro algorithm?                 uint8
            +--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 perfix-sid-sub-tlvs
         +--ro prefix-sid-sub-tlv*
            +--ro ospfv3-prefix-sid-flags
            |  +--ro bits*   identityref
            +--ro algorithm?                 uint8
            +--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-nssa/ospfv3-e-lsa:e-external-tlvs
            /ospfv3-e-lsa:external-prefix-tlv:
      +--ro perfix-sid-sub-tlvs
         +--ro prefix-sid-sub-tlv*
            +--ro ospfv3-prefix-sid-flags
            |  +--ro bits*   identityref
            +--ro algorithm?                 uint8
            +--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?   yang:dotted-quad



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            +--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-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?   yang:dotted-quad
            +--ro sid?                  uint32

<CODE BEGINS> file "ietf-ospfv3-sr@2019-08-13.yang"
module ietf-ospfv3-sr {
  namespace "urn:ietf:params:xml:ns:yang:ietf-ospfv3-sr";

  prefix ospfv3-sr;

  import ietf-inet-types {
    prefix "inet";
  }

  import ietf-yang-types {
    prefix "yang";
  }

  import ietf-routing {
    prefix "rt";
  }

  import ietf-ospf {
    prefix "ospf";
  }

  import ietf-ospfv3-extended-lsa {
    prefix "ospfv3-e-lsa";
  }

  import ietf-ospf-sr {



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    prefix "ospf-sr";
  }

  organization
    "IETF LSR - Link State Routing Working Group";

  contact
     "WG Web:   <http://tools.ietf.org/wg/lsr>
      WG List:  <mailto:lsr@ietf.org>

      Author:   Yingzhen Qu
                <mailto:yqu@futurewei.com>
      Author:   Acee Lindem
                <mailto:acee@cisco.com>";

  description
    "This YANG module defines the operational state for OSPFv3
     Segment Routing, which is common across all of the vendor
     implementations. It is intended that the module will be
     extended by vendors to define vendor-specific OSPFv3
     Segment Routing configuration and operational parameters
     and policies.

     Copyright (c) 2019 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 Simplified BSD License
     set forth in Section 4.c of the IETF Trust's Legal Provisions
     Relating to IETF Documents
     (http://trustee.ietf.org/license-info).

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

  reference "RFC XXXX";

  revision 2019-08-13 {
    description
      "";
    reference
      "RFC XXXX: A YANG Data Model for OSPF Segment Routing.";
  }

  /* groupings */
  grouping ospfv3-prefix-sid-sub-tlvs {
    description "Prefix Segment ID (SID) sub-TLVs.";



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    container perfix-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 ospf-sr:prefix-sid-bit;
            }
            description
              "Prefix SID Sub-TLV flag bits list.";
          }
          description "Segment Identifier (SID) Flags.";
        }
        leaf algorithm {
          type uint8;
          description
            "The algorithm associated with the prefix-SID.";
        }
        leaf sid {
          type uint32;
          description "An index or label.";
        }
      }
    }
  }

  grouping ospfv3-extended-prefix-range-tlvs {
    description "Extended prefix range TLV grouping.";

    container ospfv3-extended-prefix-range-tlvs {
      description "The list of range of prefixes.";
      list extended-prefix-range-tlv {    //type=2?
        description "The 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 "The number of prefixes covered by the
                       advertisement.";
        }
        leaf prefix {



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          type inet:ip-prefix;
          description "Address prefix.";
        }
        uses ospfv3-prefix-sid-sub-tlvs;
        uses ospf:unknown-tlvs;
      }
    }
  }

  grouping ospfv3-adj-sid-sub-tlvs {
    description "Adjacency SID sub TLV grouping.";
    container adj-sid-sub-tlvs {
      description "Adjacency SID optional sub-TLVs.";
      list adj-sid-sub-tlv {
        description "List of Adjacency SID sub-TLVs.";
        container adj-sid-flags {
          leaf-list bits {
            type identityref {
              base ospf-sr:adj-sid-bit;
            }
            description "Adj sid sub-tlv flags list.";
          }
          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.";
    container lan-adj-sid-sub-tlvs {
      description "LAN Adjacency SID optional sub-TLVs.";
      list lan-adj-sid-sub-tlv {
        description "List of LAN adjacency SID sub-TLVs.";
        container lan-adj-sid-flags {
          leaf-list bits {
            type identityref {
              base ospf-sr:adj-sid-bit;
            }
            description "LAN adj sid sub-tlv flags list.";



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          }
          description "LAN adj-sid sub-tlv flags.";
        }
        leaf weight {
          type uint8;
          description "Weight used for load-balancing.";
        }
        leaf neighbor-router-id {
          type yang:dotted-quad;
          description "Neighbor router ID.";
        }
        leaf sid {
          type uint32;
          description "Segment Identifier (SID) index/label.";
        }
      }
    }
  }

  /* Database */
  /* 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 "../../../../../../../../"
       + "rt:type = 'ospf:ospfv3'" {
      description
        "This augmentation is only valid for OSPFv3.";
    }
    description
      "SR specific TLVs for OSPFv3 Router Information
       opaque LSA.";
    uses ospf-sr:sr-algorithm-tlv;
    uses ospf-sr:sid-range-tlvs;
    uses ospf-sr:local-block-tlvs;
    uses ospf-sr: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" {



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    when "../../../../../../../../../../"
       + "rt:type = 'ospf:ospfv3'" {
      description
        "This augmentation is only valid for OSPFv3.";
    }

    description
      "SR specific TLVs for OSPFv3 Router Information LSA.";

    uses ospf-sr:sr-algorithm-tlv;
    uses ospf-sr:sid-range-tlvs;
    uses ospf-sr:local-block-tlvs;
    uses ospf-sr: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 "../../../../../../../../../../../../"
       + "rt:type = 'ospf:ospfv3'" {
      description
        "This augmentation is only valid for OSPFv3.";
    }

    description
      "SR specific TLVs for OSPFv3 Router Information LSA.";

    uses ospf-sr:sr-algorithm-tlv;
    uses ospf-sr:sid-range-tlvs;
    uses ospf-sr:local-block-tlvs;
    uses ospf-sr: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 "../../../../../../../../../../"
      + "rt:type = 'ospf:ospfv3'" {
      description
        "This augmentation is only valid for OSPFv3



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         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: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-intra-area-prefix" {
    when "'ospf:../../../../../../../../../"
      + "rt:type' = 'ospf:ospfv3'" {
      description
        "This augmentation is only valid for OSPFv3.";
    }
    uses ospfv3-extended-prefix-range-tlvs;
    description
      "OSPFv3 AS-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 "../../../../../../../../../../"
      + "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-inter-area-prefix" {
    when "'ospf:../../../../../../../../../"
      + "rt:type' = 'ospf:ospfv3'" {



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      description
        "This augmentation is only valid for OSPFv3.";
    }
    uses ospfv3-extended-prefix-range-tlvs;
    description
      "OSPFv3 AS-Scoped E-Inter-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-as-external" {
    when "../../../../../../../../../../"
      + "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-AS-External 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 "'ospf:../../../../../../../../../"
      + "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 "../../../../../../../../../../"



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      + "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-NSSA 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-nssa" {
    when "'ospf:../../../../../../../../../"
      + "rt:type' = 'ospf:ospfv3'" {
      description
        "This augmentation is only valid for OSPFv3.";
    }
    uses ospfv3-extended-prefix-range-tlvs;
    description
      "OSPFv3 AS-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: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-link/"
    + "ospfv3-e-lsa:e-link-tlvs/ospfv3-e-lsa:intra-prefix-tlv" {
    when "../../../../../../../../../../../../"
      + "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.";
  }

    augment "/rt:routing/"
    + "rt:control-plane-protocols/rt:control-plane-protocol/"
    + "ospf:ospf/ospf:database/"



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    + "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-link/"
    + "ospfv3-e-lsa:e-link-tlvs/ospfv3-e-lsa:intra-prefix-tlv" {
    when "'ospf:../../../../../../../../../"
      + "rt:type' = 'ospf:ospfv3'" {
      description
        "This augmentation is only valid for OSPFv3.";
    }
    uses ospfv3-prefix-sid-sub-tlvs;
    description
      "OSPFv3 AS-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 "../../../../../../../../../../../../"
      + "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.";
  }

    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-intra-area-prefix/"
    + "ospfv3-e-lsa:e-intra-prefix-tlvs/ospfv3-e-lsa:intra-prefix-tlv" {
    when "'ospf:../../../../../../../../../"
      + "rt:type' = 'ospf:ospfv3'" {
      description
        "This augmentation is only valid for OSPFv3.";
    }
    uses ospfv3-prefix-sid-sub-tlvs;
    description
      "OSPFv3 AS-Scoped Intra-Area Prefix TLV.";
  }



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  /* 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 "../../../../../../../../../../../../"
      + "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.";
  }

    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-inter-area-prefix/"
    + "ospfv3-e-lsa:e-inter-prefix-tlvs/ospfv3-e-lsa:inter-prefix-tlv" {
    when "'ospf:../../../../../../../../../"
      + "rt:type' = 'ospf:ospfv3'" {
      description
        "This augmentation is only valid for OSPFv3.";
    }
    uses ospfv3-prefix-sid-sub-tlvs;
    description
      "OSPFv3 AS-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: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-as-external/"
    + "ospfv3-e-lsa:e-external-tlvs/ospfv3-e-lsa:external-prefix-tlv" {
    when "../../../../../../../../../../../../"
      + "rt:type = 'ospf:ospfv3'" {
      description
        "This augmentation is only valid for OSPFv3



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         E-Router LSAs";
    }
    uses ospfv3-prefix-sid-sub-tlvs;
    description
      "OSPFv3 Area-Scoped 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 "'ospf:../../../../../../../../../"
      + "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 "../../../../../../../../../../../../"
      + "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 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-nssa/"



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    + "ospfv3-e-lsa:e-external-tlvs/ospfv3-e-lsa:external-prefix-tlv" {
    when "'ospf:../../../../../../../../../"
      + "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.";
  }

  /* 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 "../../../../../../../../../../../../"
      + "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.";
  }

    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-router/"
    + "ospfv3-e-lsa:e-router-tlvs/ospfv3-e-lsa:link-tlv" {
    when "'ospf:../../../../../../../../../"
      + "rt:type' = 'ospf:ospfv3'" {
      description
        "This augmentation is only valid for OSPFv3.";
    }
    uses ospfv3-adj-sid-sub-tlvs;
    uses ospfv3-lan-adj-sid-sub-tlvs;
    description
      "OSPFv3 AS-Scoped Adj-SID Sub-TLV.";
  }



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}
<CODE ENDS>

4.  Security Considerations

   The YANG modules 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
   [RFC5246].

   The NETCONF access control model [RFC6536] 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 modules 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.

   Some of the readable data nodes in the modules 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 exposure of the Link State
   Database (LSDB) will expose the detailed topology of the network.
   This may be undesirable since both due to the fact that exposure may
   facilitate other attacks.  Additionally, network operators may
   consider their topologies to be sensitive confidential data.

5.  IANA Considerations

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

      URI: urn:ietf:params:xml:ns:yang:ietf-ospfv3-sr
      Registrant Contact: The IESG.
      XML: N/A, the requested URI is an XML namespace.

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





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      name: ietf-ospfv3-sr
      namespace: urn:ietf:params:xml:ns:yang:ietf-ospfv3-sr
      prefix: ospfv3-sr
      reference: RFC XXXX

6.  Acknowledgements

   This document was produced using Marshall Rose's xml2rfc tool.

   The YANG model was developed using the suite of YANG tools written
   and maintained by numerous authors.

7.  References

7.1.  Normative References

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119,
              DOI 10.17487/RFC2119, March 1997,
              <https://www.rfc-editor.org/info/rfc2119>.

   [RFC3688]  Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
              DOI 10.17487/RFC3688, January 2004,
              <https://www.rfc-editor.org/info/rfc3688>.

   [RFC5246]  Dierks, T. and E. Rescorla, "The Transport Layer Security
              (TLS) Protocol Version 1.2", RFC 5246,
              DOI 10.17487/RFC5246, August 2008,
              <https://www.rfc-editor.org/info/rfc5246>.

   [RFC6020]  Bjorklund, M., Ed., "YANG - A Data Modeling Language for
              the Network Configuration Protocol (NETCONF)", RFC 6020,
              DOI 10.17487/RFC6020, October 2010,
              <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, June 2011,
              <https://www.rfc-editor.org/info/rfc6241>.

   [RFC6242]  Wasserman, M., "Using the NETCONF Protocol over Secure
              Shell (SSH)", RFC 6242, DOI 10.17487/RFC6242, June 2011,
              <https://www.rfc-editor.org/info/rfc6242>.

   [RFC6536]  Bierman, A. and M. Bjorklund, "Network Configuration
              Protocol (NETCONF) Access Control Model", RFC 6536,
              DOI 10.17487/RFC6536, March 2012,
              <https://www.rfc-editor.org/info/rfc6536>.



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   [RFC7950]  Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language",
              RFC 7950, DOI 10.17487/RFC7950, August 2016,
              <https://www.rfc-editor.org/info/rfc7950>.

   [RFC8022]  Lhotka, L. and A. Lindem, "A YANG Data Model for Routing
              Management", RFC 8022, DOI 10.17487/RFC8022, November
              2016, <https://www.rfc-editor.org/info/rfc8022>.

   [RFC8040]  Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF
              Protocol", RFC 8040, DOI 10.17487/RFC8040, January 2017,
              <https://www.rfc-editor.org/info/rfc8040>.

   [RFC8349]  Lhotka, L., Lindem, A., and Y. Qu, "A YANG Data Model for
              Routing Management (NMDA Version)", RFC 8349,
              DOI 10.17487/RFC8349, March 2018,
              <https://www.rfc-editor.org/info/rfc8349>.

7.2.  Informative References

   [I-D.ietf-ospf-ospfv3-segment-routing-extensions]
              Psenak, P. and S. Previdi, "OSPFv3 Extensions for Segment
              Routing", draft-ietf-ospf-ospfv3-segment-routing-
              extensions-23 (work in progress), January 2019.

   [I-D.ietf-ospf-sr-yang]
              Yeung, D., Qu, Y., Zhang, Z., Chen, I., and A. Lindem,
              "YANG Data Model for OSPF SR (Segment Routing) Protocol",
              draft-ietf-ospf-sr-yang-09 (work in progress), August
              2019.

   [I-D.ietf-ospf-yang]
              Yeung, D., Qu, Y., Zhang, Z., Chen, I., and A. Lindem,
              "YANG Data Model for OSPF Protocol", draft-ietf-ospf-
              yang-26 (work in progress), August 2019.

   [RFC8340]  Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams",
              BCP 215, RFC 8340, DOI 10.17487/RFC8340, March 2018,
              <https://www.rfc-editor.org/info/rfc8340>.

Authors' Addresses

   Acee Lindem
   Cisco Systems
   301 Midenhall Way
   Cary, NC 27513

   EMail: acee@cisco.com




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   Yingzhen Qu
   Futurewei
   2330 Central Expressway
   Santa Clara, CA  95050
   USA

   EMail: yingzhen.qu@futurewei.com












































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