Internet Y. Qu Internet-Draft Futurewei Technologies Intended status: Standards Track A. Lindem Expires: 7 June 2025 LabN Consulting, L.L.C. J. Zhang Juniper Networks I. Chen The MITRE Corporation 4 December 2024 A YANG Data Model for OSPF Segment Routing for the MPLS Data Plane draft-ietf-ospf-sr-yang-32 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 7 June 2025. Copyright Notice Copyright (c) 2024 IETF Trust and the persons identified as the document authors. All rights reserved. Qu, et al. Expires 7 June 2025 [Page 1] Internet-Draft OSPF SR MPLS YANG December 2024 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 Revised BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Revised BSD License. Table of Contents 1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1. Requirements Language . . . . . . . . . . . . . . . . . . 2 1.2. Tree Diagrams . . . . . . . . . . . . . . . . . . . . . . 2 2. OSPF Segment Routing . . . . . . . . . . . . . . . . . . . . 3 2.1. OSPF Segment Routing YANG Module . . . . . . . . . . . . 13 3. Security Considerations . . . . . . . . . . . . . . . . . . . 41 4. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 42 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 43 6. References . . . . . . . . . . . . . . . . . . . . . . . . . 43 6.1. Normative References . . . . . . . . . . . . . . . . . . 43 6.2. Informative References . . . . . . . . . . . . . . . . . 46 Appendix A. A Configuration Example . . . . . . . . . . . . . . 46 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 48 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", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all capitals, as shown here. 1.2. Tree Diagrams This document uses the graphical representation of data models defined in [RFC8340]. Qu, et al. Expires 7 June 2025 [Page 2] Internet-Draft OSPF SR MPLS YANG December 2024 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 enabled? boolean +--rw selection-tie-breakers +--rw node-protection! Qu, et al. Expires 7 June 2025 [Page 3] Internet-Draft OSPF SR MPLS YANG December 2024 | +--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? | iana-rt-types:address-family +--ro range-size? uint16 +--ro extended-prefix-range-flags | +--ro flags* identityref +--ro prefix? inet:ipv4-prefix +--ro prefix-sid-sub-tlvs | +--ro prefix-sid-sub-tlv* [] | +--ro prefix-sid-flags | | +--ro flags* 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? | iana-rt-types:address-family +--ro range-size? uint16 Qu, et al. Expires 7 June 2025 [Page 4] Internet-Draft OSPF SR MPLS YANG December 2024 +--ro extended-prefix-range-flags | +--ro flags* identityref +--ro prefix? inet:ipv4-prefix +--ro prefix-sid-sub-tlvs | +--ro prefix-sid-sub-tlv* [] | +--ro prefix-sid-flags | | +--ro flags* 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? | iana-rt-types:address-family +--ro range-size? uint16 +--ro extended-prefix-range-flags | +--ro flags* identityref +--ro prefix? inet:ipv4-prefix +--ro prefix-sid-sub-tlvs | +--ro prefix-sid-sub-tlv* [] | +--ro prefix-sid-flags | | +--ro flags* 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 Qu, et al. Expires 7 June 2025 [Page 5] Internet-Draft OSPF SR MPLS YANG December 2024 /ospf:extended-prefix-opaque/ospf:extended-prefix-tlv: +--ro prefix-sid-sub-tlvs +--ro prefix-sid-sub-tlv* [] +--ro prefix-sid-flags | +--ro flags* 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 flags* 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 flags* 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 flags* identityref | +--ro mt-id? uint8 | +--ro weight? uint8 | +--ro sid? uint32 +--ro lan-adj-sid-sub-tlvs Qu, et al. Expires 7 June 2025 [Page 6] Internet-Draft OSPF SR MPLS YANG December 2024 +--ro lan-adj-sid-sub-tlv* [] +--ro lan-adj-sid-flags | +--ro flags* 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 length? uint16 | +--ro sid? uint32 +--ro local-block-tlvs | +--ro local-block-tlv* [] | +--ro range-size? rt-types:uint24 | +--ro sid-sub-tlv | +--ro length? uint16 | +--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 length? uint16 | +--ro sid? uint32 +--ro local-block-tlvs | +--ro local-block-tlv* [] | +--ro range-size? rt-types:uint24 | +--ro sid-sub-tlv Qu, et al. Expires 7 June 2025 [Page 7] Internet-Draft OSPF SR MPLS YANG December 2024 | +--ro length? uint16 | +--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 length? uint16 | +--ro sid? uint32 +--ro local-block-tlvs | +--ro local-block-tlv* [] | +--ro range-size? rt-types:uint24 | +--ro sid-sub-tlv | +--ro length? uint16 | +--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 length? uint16 | +--ro sid? uint32 +--ro local-block-tlvs | +--ro local-block-tlv* [] | +--ro range-size? rt-types:uint24 | +--ro sid-sub-tlv | +--ro length? uint16 | +--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 Qu, et al. Expires 7 June 2025 [Page 8] Internet-Draft OSPF SR MPLS YANG December 2024 /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 length? uint16 | +--ro sid? uint32 +--ro local-block-tlvs | +--ro local-block-tlv* [] | +--ro range-size? rt-types:uint24 | +--ro sid-sub-tlv | +--ro length? uint16 | +--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 length? uint16 | +--ro sid? uint32 +--ro local-block-tlvs | +--ro local-block-tlv* [] | +--ro range-size? rt-types:uint24 | +--ro sid-sub-tlv | +--ro length? uint16 | +--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 Qu, et al. Expires 7 June 2025 [Page 9] Internet-Draft OSPF SR MPLS YANG December 2024 /ospfv3-e-lsa:e-intra-area-prefix: +--ro ospfv3-extended-prefix-range-tlvs +--ro extended-prefix-range-tlv* [] +--ro prefix-length? uint8 +--ro af? | iana-rt-types:address-family +--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 flags* 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? | iana-rt-types:address-family +--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 flags* 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: Qu, et al. Expires 7 June 2025 [Page 10] Internet-Draft OSPF SR MPLS YANG December 2024 +--ro ospfv3-extended-prefix-range-tlvs +--ro extended-prefix-range-tlv* [] +--ro prefix-length? uint8 +--ro af? | iana-rt-types:address-family +--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 flags* 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? | iana-rt-types:address-family +--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 flags* 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 Qu, et al. Expires 7 June 2025 [Page 11] Internet-Draft OSPF SR MPLS YANG December 2024 /ospfv3-e-lsa:e-link-tlvs /ospfv3-e-lsa:intra-prefix-tlv/ospfv3-e-lsa:sub-tlvs: +--ro prefix-sid-sub-tlvs +--ro prefix-sid-sub-tlv* [] +--ro ospfv3-prefix-sid-flags | +--ro flags* 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/ospfv3-e-lsa:sub-tlvs: +--ro prefix-sid-sub-tlvs +--ro prefix-sid-sub-tlv* [] +--ro ospfv3-prefix-sid-flags | +--ro flags* 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/ospfv3-e-lsa:sub-tlvs: +--ro prefix-sid-sub-tlvs +--ro prefix-sid-sub-tlv* [] +--ro ospfv3-prefix-sid-flags | +--ro flags* 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 /ospfv3-e-lsa:sub-tlvs: +--ro prefix-sid-sub-tlvs +--ro prefix-sid-sub-tlv* [] +--ro ospfv3-prefix-sid-flags | +--ro flags* identityref Qu, et al. Expires 7 June 2025 [Page 12] Internet-Draft OSPF SR MPLS YANG December 2024 +--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 /ospfv3-e-lsa:sub-tlvs: +--ro prefix-sid-sub-tlvs +--ro prefix-sid-sub-tlv* [] +--ro ospfv3-prefix-sid-flags | +--ro flags* 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/ospfv3-e-lsa:sub-tlvs: +--ro adj-sid-sub-tlvs | +--ro adj-sid-sub-tlv* [] | +--ro adj-sid-flags | | +--ro flags* 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 flags* identityref +--ro weight? uint8 +--ro neighbor-router-id? rt-types:router-id +--ro sid? uint32 2.1. OSPF Segment Routing YANG Module [RFC2328], [RFC4750], [RFC4915], [RFC5340], [RFC5643], [RFC5838], [RFC6991], [RFC8102], [RFC8294], [RFC8343], [RFC8476], [RFC8349], [RFC9587], and [I-D.ietf-rtgwg-segment-routing-ti-lfa] are referenced in the YANG data model. Qu, et al. Expires 7 June 2025 [Page 13] Internet-Draft OSPF SR MPLS YANG December 2024 file "ietf-ospf-sr-mpls@2024-06-19.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 iana-routing-types { prefix iana-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 9587 - YANG Data Model for OSPFv3 Extended LSAs"; } Qu, et al. Expires 7 June 2025 [Page 14] Internet-Draft OSPF SR MPLS YANG December 2024 organization "IETF LSR - Link State Routing Working Group"; contact "WG Web: WG List: Author: Yingzhen Qu Author: Acee Lindem Author: Derek Yeung Author: Jeffrey Zhang Author: Ing-Wher Chen "; 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. Qu, et al. Expires 7 June 2025 [Page 15] Internet-Draft OSPF SR MPLS YANG December 2024 This version of this YANG module is part of RFC XXXX; see the RFC itself for full legal notices."; reference "RFC XXXX"; revision 2024-06-19 { 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-flag { description "Base identity for prefix SID sub-TLV flags."; reference "RFC 8665: OSPF Extensions for Segment Routing RFC 8666: OSPFv3 Extensions for Segment Routing"; } identity np-flag { base prefix-sid-flag; description "No-PHP flag."; } identity m-flag { base prefix-sid-flag; description "Mapping server flag."; } Qu, et al. Expires 7 June 2025 [Page 16] Internet-Draft OSPF SR MPLS YANG December 2024 identity e-flag { base prefix-sid-flag; description "Explicit-NULL flag."; } identity v-flag { base prefix-sid-flag; description "Value/Index flag."; } identity l-flag { base prefix-sid-flag; description "Local flag."; } identity extended-prefix-range-flag { description "Base identity for extended prefix range TLV flags."; } identity ia-flag { base extended-prefix-range-flag; description "Inter-Area flag. If set, advertisement is of inter-area type."; reference "RFC 8665: OSPF Extensions for Segment Routing"; } identity adj-sid-flag { description "Base identity for Adj-SID sub-TLV flags."; reference "RFC 8665: OSPF Extensions for Segment Routing RFC 8666: OSPFv3 Extensions for Segment Routing"; } identity b-flag { base adj-sid-flag; description "Backup flag."; } identity vi-flag { base adj-sid-flag; Qu, et al. Expires 7 June 2025 [Page 17] Internet-Draft OSPF SR MPLS YANG December 2024 description "Value/Index flag."; } identity lo-flag { base adj-sid-flag; description "Local/Global flag."; } identity g-flag { base adj-sid-flag; description "Group flag."; } identity p-flag { base adj-sid-flag; 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 length { type uint16; description "Length of the SID value. YANG model specification is necessary since it dictates the semantics of the SID."; } leaf sid { type uint32; description "Segment Identifier (SID) - A 20 bit label or 32 bit SID. If the length is set to 3, then the 20 rightmost bits represent a label. If the length is set to 4, then the value represents a 32-bit SID."; Qu, et al. Expires 7 June 2025 [Page 18] Internet-Draft OSPF SR MPLS YANG December 2024 } } } grouping ospfv2-prefix-sid-sub-tlvs { description "Prefix Segment ID (SID) sub-TLVs."; reference "RFC 8665: OSPF Extensions for Segment Routing (Section 5)"; 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 flags { type identityref { base prefix-sid-flag; } description "Prefix SID Sub-TLV flags."; } description "Segment Identifier (SID) Flags."; } leaf mt-id { type uint8; description "Multi-topology ID. Topologies range from 0-127 and return of any other value would indicate an error."; reference "RFC 4915 - Multi-Topology (MT) Routing in OSPF"; } leaf algorithm { type identityref { base sr-cmn:prefix-sid-algorithm; } description "Algorithm associated with the prefix-SID."; } leaf sid { type uint32; description "Segment Identifier (SID) - A 20 bit label or an index into the SID/Label space. Qu, et al. Expires 7 June 2025 [Page 19] Internet-Draft OSPF SR MPLS YANG December 2024 If the V-Flag is set to 0 and L-Flag is set to 0: The SID/Index/Label field is a 4-octet index defining the offset in the SID/Label space advertised by this router. If V-Flag is set to 1 and L-Flag is set to 1: The SID/Index/Label field is a 3-octet local label where the 20 rightmost bits are used for encoding the label value."; } } } } 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 iana-rt-types:address-family; 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 flags { type identityref { base extended-prefix-range-flag; } description Qu, et al. Expires 7 June 2025 [Page 20] Internet-Draft OSPF SR MPLS YANG December 2024 "Extended prefix range TLV flags."; } description "Extended Prefix Range TLV flags."; } leaf prefix { type inet:ipv4-prefix; description "IPv4 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."; Qu, et al. Expires 7 June 2025 [Page 21] Internet-Draft OSPF SR MPLS YANG December 2024 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. The return of a zero value would indicate an error."; } 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."; Qu, et al. Expires 7 June 2025 [Page 22] Internet-Draft OSPF SR MPLS YANG December 2024 leaf preference { type uint8; description "SRMS preference TLV, value from 0 to 255 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 flags { type identityref { base prefix-sid-flag; } description "Prefix SID sub-TLV flags."; } 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 "Segment Identifier (SID) - A 20 bit label or an index into the SID/Label space. If the V-Flag is set to 0 and L-Flag is set to 0: The SID/Index/Label field is a 4-octet index defining the offset in the SID/Label space advertised by this Qu, et al. Expires 7 June 2025 [Page 23] Internet-Draft OSPF SR MPLS YANG December 2024 router. If V-Flag is set to 1 and L-Flag is set to 1: The SID/Index/Label field is a 3-octet local label where the 20 rightmost bits are used for encoding the label value."; } } } } 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 iana-rt-types:address-family; description "Address family for the prefix."; } leaf range-size { type uint16; description "Number of prefixes covered by the advertisement. The return of a value of zero would indicate an error."; } leaf prefix { type inet:ip-prefix; description "IPv4 or IPv6 prefix."; } uses ospfv3-prefix-sid-sub-tlvs; uses ospf:unknown-tlvs; } } Qu, et al. Expires 7 June 2025 [Page 24] Internet-Draft OSPF SR MPLS YANG December 2024 } 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 flags { type identityref { base adj-sid-flag; } description "Adj-SID sub-tlv flags."; } description "Adj-sid sub-tlv flags."; } leaf weight { type uint8; description "Weight used for load-balancing."; } leaf sid { type uint32; description "Segment Identifier (SID) - A 20 bit label or an index into the SID/Label space. If the V-Flag is set to 0 and L-Flag is set to 0: The SID/Index/Label field is a 4-octet index defining the offset in the SID/Label space advertised by this router. If V-Flag is set to 1 and L-Flag is set to 1: The SID/Index/Label field is a 3-octet local label where the 20 rightmost bits are used for encoding the label value."; } } } Qu, et al. Expires 7 June 2025 [Page 25] Internet-Draft OSPF SR MPLS YANG December 2024 } 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 flags { type identityref { base adj-sid-flag; } description "LAN Adj-SID sub-TLV flags."; } 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) - A 20 bit label or an index into the SID/Label space. If the V-Flag is set to 0 and L-Flag is set to 0: The SID/Index/Label field is a 4-octet index defining the offset in the SID/Label space advertised by this router. If V-Flag is set to 1 and L-Flag is set to 1: The SID/Index/Label field is a 3-octet local label where Qu, et al. Expires 7 June 2025 [Page 26] Internet-Draft OSPF SR MPLS YANG December 2024 the 20 rightmost bits are used for encoding the label value."; } } } } /* 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 for the MPLS data plane."; 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."; } Qu, et al. Expires 7 June 2025 [Page 27] Internet-Draft OSPF SR MPLS YANG December 2024 description "This augments LAN interface adj-sid with neighbor-id."; leaf neighbor-id { type inet:ip-address; mandatory true; description "Neighbor's Router ID, IPv4 address, or IPv6 address. Specification is optional and, if specified, SHOULD specify a neighbor reachable via the interface."; } } } } 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 enabled { type boolean; default "false"; 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 Qu, et al. Expires 7 June 2025 [Page 28] Internet-Draft OSPF SR MPLS YANG December 2024 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. multiple tie-breakers and priorities configured may be configured."; } description "Topology-Independent Loop Free Alternate (TI-LFA) support."; reference "draft-ietf-rtgwg-segment-routing-ti-lfa - Topology-Independent Fast Reroute using Segment Routing"; } } 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; Qu, et al. Expires 7 June 2025 [Page 29] Internet-Draft OSPF SR MPLS YANG December 2024 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; } Qu, et al. Expires 7 June 2025 [Page 30] Internet-Draft OSPF SR MPLS YANG December 2024 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 Qu, et al. Expires 7 June 2025 [Page 31] Internet-Draft OSPF SR MPLS YANG December 2024 "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."; Qu, et al. Expires 7 June 2025 [Page 32] Internet-Draft OSPF SR MPLS YANG December 2024 container adj-sid-flags { leaf-list flags { type identityref { base adj-sid-flag; } description "Adj-SID sub-TLV flags."; } description "Adj-sid sub-TLV flags."; } leaf mt-id { type uint8; description "Multi-topology ID. Topologies range from 0-127 and return of any other value would indicate an error."; reference "RFC 4915 - Multi-Topology (MT) Routing in OSPF"; } leaf weight { type uint8; description "Weight used for load-balancing."; } leaf sid { type uint32; description "Segment Identifier (SID) - A 20 bit label or an index into the SID/Label space. If the V-Flag is set to 0 and L-Flag is set to 0: The SID/Index/Label field is a 4-octet index defining the offset in the SID/Label space advertised by this router. If V-Flag is set to 1 and L-Flag is set to 1: The SID/Index/Label field is a 3-octet local label where the 20 rightmost bits are used for encoding the label value."; } } } 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."; Qu, et al. Expires 7 June 2025 [Page 33] Internet-Draft OSPF SR MPLS YANG December 2024 container lan-adj-sid-flags { leaf-list flags { type identityref { base adj-sid-flag; } description "LAN Adj-SID sub-TLV flags."; } description "LAN Adj-SID sub-TLV flags."; } leaf mt-id { type uint8; description "Multi-topology ID. Topologies range from 0-127 and return of any other value would indicate an error."; reference "RFC 4915 - Multi-Topology (MT) Routing in OSPF"; } 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) - A 20 bit label or an index into the SID/Label space. If the V-Flag is set to 0 and L-Flag is set to 0: The SID/Index/Label field is a 4-octet index defining the offset in the SID/Label space advertised by this router. If V-Flag is set to 1 and L-Flag is set to 1: The SID/Index/Label field is a 3-octet local label where the 20 rightmost bits are used for encoding the label value."; } } } } Qu, et al. Expires 7 June 2025 [Page 34] Internet-Draft OSPF SR MPLS YANG December 2024 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')" { Qu, et al. Expires 7 June 2025 [Page 35] Internet-Draft OSPF SR MPLS YANG December 2024 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; Qu, et al. Expires 7 June 2025 [Page 36] Internet-Draft OSPF SR MPLS YANG December 2024 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/" Qu, et al. Expires 7 June 2025 [Page 37] Internet-Draft OSPF SR MPLS YANG December 2024 + "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/" Qu, et al. Expires 7 June 2025 [Page 38] Internet-Draft OSPF SR MPLS YANG December 2024 + "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/" + "ospfv3-e-lsa:sub-tlvs" { 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/" + "ospfv3-e-lsa:sub-tlvs" { 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/" Qu, et al. Expires 7 June 2025 [Page 39] Internet-Draft OSPF SR MPLS YANG December 2024 + "ospfv3-e-lsa:e-inter-prefix-tlvs/" + "ospfv3-e-lsa:inter-prefix-tlv/" + "ospfv3-e-lsa:sub-tlvs" { 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/" + "ospfv3-e-lsa:sub-tlvs" { 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/" + "ospfv3-e-lsa:sub-tlvs" { 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."; Qu, et al. Expires 7 June 2025 [Page 40] Internet-Draft OSPF SR MPLS YANG December 2024 } 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/" + "ospfv3-e-lsa:sub-tlvs" { 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."; } } 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. Qu, et al. Expires 7 June 2025 [Page 41] Internet-Draft OSPF SR MPLS YANG December 2024 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: /ospf:ospf/segment-routing/enabled - Modification to the enablement for SR could result in a Denial-of-Service (Dos) attack. If an attacker disables SR, it will cause traffic disruption. /ospf:ospf/segment-routing/bindings - Modification to the local bindings could result in a Denial-of-Service (Dos) attack. /ospf:ospf/protocol-srgb - Modification of the protocol SRGB could be used to mount a DoS attack. For example, if the protocol SRBG size is reduced to a very small value, a lot of existing segments could no longer be installed leading to a traffic disruption. /ospf:interfaces/ospf:interface/segment-routing - Modification of the Adjacency Segment Identifier (Adj-SID) could be used to mount a DoS attack. Change of an Adj-SID could be used to redirect traffic. /ospf:interfaces/ospf:interface/ospf:fast-reroute/ti-lfa - Modification of the TI-LFA enablement could lead to traffic disruption. 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 Dean Bogdanovic and Kiran Koushik Agrahara Sreenivasa for their YANG model discussions. The authors wish to thank Yi Yang, Alexander Clemm, Gaurav Gupta, Ladislav Lhotka, Stephane Litkowski, Greg Hankins, Manish Gupta, Alan Davey, Divakaran Baskaran, Reshad Rahman, and Tom Petch for their thorough reviews and helpful comments. Qu, et al. Expires 7 June 2025 [Page 42] Internet-Draft OSPF SR MPLS YANG December 2024 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] Bashandy, A., Litkowski, S., 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- 19, 22 November 2024, . [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . Qu, et al. Expires 7 June 2025 [Page 43] Internet-Draft OSPF SR MPLS YANG December 2024 [RFC2328] Moy, J., "OSPF Version 2", STD 54, RFC 2328, DOI 10.17487/RFC2328, April 1998, . [RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, DOI 10.17487/RFC3688, January 2004, . [RFC4750] Joyal, D., Ed., Galecki, P., Ed., and S. Giacalone, Ed., "OSPF Version 2 Management Information Base", RFC 4750, DOI 10.17487/RFC4750, December 2006, . [RFC4915] Psenak, P., Mirtorabi, S., Roy, A., Nguyen, L., and P. Pillay-Esnault, "Multi-Topology (MT) Routing in OSPF", RFC 4915, DOI 10.17487/RFC4915, June 2007, . [RFC5340] Coltun, R., Ferguson, D., Moy, J., and A. Lindem, "OSPF for IPv6", RFC 5340, DOI 10.17487/RFC5340, July 2008, . [RFC5643] Joyal, D., Ed. and V. Manral, Ed., "Management Information Base for OSPFv3", RFC 5643, DOI 10.17487/RFC5643, August 2009, . [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, April 2010, . [RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for the Network Configuration Protocol (NETCONF)", RFC 6020, DOI 10.17487/RFC6020, October 2010, . [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, . [RFC6242] Wasserman, M., "Using the NETCONF Protocol over Secure Shell (SSH)", RFC 6242, DOI 10.17487/RFC6242, June 2011, . [RFC6991] Schoenwaelder, J., Ed., "Common YANG Data Types", RFC 6991, DOI 10.17487/RFC6991, July 2013, . Qu, et al. Expires 7 June 2025 [Page 44] Internet-Draft OSPF SR MPLS YANG December 2024 [RFC7950] Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language", RFC 7950, DOI 10.17487/RFC7950, August 2016, . [RFC8040] Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF Protocol", RFC 8040, DOI 10.17487/RFC8040, January 2017, . [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, March 2017, . [RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, May 2017, . [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, December 2017, . [RFC8341] Bierman, A. and M. Bjorklund, "Network Configuration Access Control Model", STD 91, RFC 8341, DOI 10.17487/RFC8341, March 2018, . [RFC8343] Bjorklund, M., "A YANG Data Model for Interface Management", RFC 8343, DOI 10.17487/RFC8343, March 2018, . [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, . [RFC8446] Rescorla, E., "The Transport Layer Security (TLS) Protocol Version 1.3", RFC 8446, DOI 10.17487/RFC8446, August 2018, . [RFC8476] Tantsura, J., Chunduri, U., Aldrin, S., and P. Psenak, "Signaling Maximum SID Depth (MSD) Using OSPF", RFC 8476, DOI 10.17487/RFC8476, December 2018, . Qu, et al. Expires 7 June 2025 [Page 45] Internet-Draft OSPF SR MPLS YANG December 2024 [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, December 2019, . [RFC8666] Psenak, P., Ed. and S. Previdi, Ed., "OSPFv3 Extensions for Segment Routing", RFC 8666, DOI 10.17487/RFC8666, December 2019, . [RFC9020] Litkowski, S., Qu, Y., Lindem, A., Sarkar, P., and J. Tantsura, "YANG Data Model for Segment Routing", RFC 9020, DOI 10.17487/RFC9020, May 2021, . [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, October 2022, . [RFC9587] Lindem, A., Palani, S., and Y. Qu, "YANG Data Model for OSPFv3 Extended Link State Advertisements (LSAs)", RFC 9587, DOI 10.17487/RFC9587, June 2024, . 6.2. Informative References [RFC8340] Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams", BCP 215, RFC 8340, DOI 10.17487/RFC8340, March 2018, . [RFC8342] Bjorklund, M., Schoenwaelder, J., Shafer, P., Watsen, K., and R. Wilton, "Network Management Datastore Architecture (NMDA)", RFC 8342, DOI 10.17487/RFC8342, March 2018, . [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, June 2020, . 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]. Qu, et al. Expires 7 June 2025 [Page 46] Internet-Draft OSPF SR MPLS YANG December 2024 1.1.1.1 \ ospf:ospfv2 OSPFv2 0.0.0.0 eth0 3888 true 4000 5000 The following is the same example using JSON format. Qu, et al. Expires 7 June 2025 [Page 47] Internet-Draft OSPF SR MPLS YANG December 2024 { "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 } } } } } } } Authors' Addresses Yingzhen Qu Futurewei Technologies 2330 Central Expressway Santa Clara, CA 95050 United States of America Email: yingzhen.ietf@gmail.com Qu, et al. Expires 7 June 2025 [Page 48] Internet-Draft OSPF SR MPLS YANG December 2024 Acee Lindem LabN Consulting, L.L.C. 301 Midenhall Way Cary, NC 27513 Email: acee.ietf@gmail.com Jeffrey Zhang Juniper Networks 10 Technology Park Drive Westford, MA 01886 United States of America Email: zzhang@juniper.net Ing-Wher Chen The MITRE Corporation Email: ingwherchen@mitre.org Qu, et al. Expires 7 June 2025 [Page 49]