Internet A. Lindem Internet-Draft Cisco Systems Intended status: Standards Track Y. Qu Expires: 23 October 2022 Futurewei 21 April 2022 YANG Data Model for OSPFv3 Segment Routing draft-acee-lsr-ospfv3-sr-yang-07 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 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 23 October 2022. Copyright Notice Copyright (c) 2022 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 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. Lindem & Qu Expires 23 October 2022 [Page 1] Internet-Draft OSPFv3 SR YANG April 2022 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 . . . . . . . . . . . . . . . . . . . 17 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 18 6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 18 7. References . . . . . . . . . . . . . . . . . . . . . . . . . 18 7.1. Normative References . . . . . . . . . . . . . . . . . . 18 7.2. Informative References . . . . . . . . . . . . . . . . . 20 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 20 1. Overview YANG [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 with the MPLS data plane. [RFC8666]. 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 Tree diagrams used in this document follow the notation defined in [RFC8340]. Lindem & Qu Expires 23 October 2022 [Page 2] Internet-Draft OSPFv3 SR YANG April 2022 3. OSPFv3 Extensions for Segment Routing This document defines a YANG module for OSPFv3 extensions for Segment Routing [RFC8666]. It is an augmentation of the OSPF SR base YANG model, where the configuration for both OSPFv2 and OSPFv3 are defined. [RFC8022] and [RFC8349] are not referenced in the document text but within the YANG module itself. 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 Lindem & Qu Expires 23 October 2022 [Page 3] Internet-Draft OSPFv3 SR YANG April 2022 +--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* 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: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: Lindem & Qu Expires 23 October 2022 [Page 4] Internet-Draft OSPFv3 SR YANG April 2022 +--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 +--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 Lindem & Qu Expires 23 October 2022 [Page 5] Internet-Draft OSPFv3 SR YANG April 2022 +--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:interfaces/ospf:interface/ospf:database /ospf:link-scope-lsa-type/ospf:link-scope-lsas /ospf:link-scope-lsa/ospf:version/ospf:ospfv3/ospf:ospfv3 /ospf:body/ospfv3-e-lsa:e-link/ospfv3-e-lsa:e-link-tlvs /ospfv3-e-lsa:intra-prefix-tlv: +--ro 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: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* [] Lindem & Qu Expires 23 October 2022 [Page 6] Internet-Draft OSPFv3 SR YANG April 2022 +--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: +--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 +--ro sid? uint32 Lindem & Qu Expires 23 October 2022 [Page 7] Internet-Draft OSPFv3 SR YANG April 2022 file "ietf-ospfv3-sr@2021-10-18.yang" module ietf-ospfv3-sr { yang-version 1.1; 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 { prefix "ospf-sr"; } organization "IETF LSR - Link State Routing Working Group"; contact "WG Web: WG List: Author: Yingzhen Qu Author: Acee Lindem "; 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 Lindem & Qu Expires 23 October 2022 [Page 8] Internet-Draft OSPFv3 SR YANG April 2022 Segment Routing configuration and operational parameters and policies. This YANG model conforms to the Network Management Datastore Architecture (NMDA) as described in RFC 8342. Copyright (c) 2021 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. 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."; reference "RFC XXXX"; revision 2021-10-18 { description "Initial revision."; reference "RFC XXXX: A YANG Data Model for OSPFv3 Segment Routing."; } /* groupings */ grouping ospfv3-prefix-sid-sub-tlvs { description "Prefix Segment ID (SID) sub-TLVs."; 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."; Lindem & Qu Expires 23 October 2022 [Page 9] Internet-Draft OSPFv3 SR YANG April 2022 } 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 extended prefix range TLVs."; list extended-prefix-range-tlv { 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 { 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."; Lindem & Qu Expires 23 October 2022 [Page 10] Internet-Draft OSPFv3 SR YANG April 2022 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."; } 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."; } Lindem & Qu Expires 23 October 2022 [Page 11] Internet-Draft OSPFv3 SR YANG April 2022 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" { 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; Lindem & Qu Expires 23 October 2022 [Page 12] Internet-Draft OSPFv3 SR YANG April 2022 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 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/" Lindem & Qu Expires 23 October 2022 [Page 13] Internet-Draft OSPFv3 SR YANG April 2022 + "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-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: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/" Lindem & Qu Expires 23 October 2022 [Page 14] Internet-Draft OSPFv3 SR YANG April 2022 + "ospf:ospf/ospf:areas/ospf:area/ospf:interfaces/" + "ospf:interface/" + "ospf:database/ospf:link-scope-lsa-type/ospf:link-scope-lsas/" + "ospf:link-scope-lsa/ospf:version/ospf:ospfv3/ospf:ospfv3/" + "ospf:body/ospfv3-e-lsa:e-link/" + "ospfv3-e-lsa:e-link-tlvs/ospfv3-e-lsa:intra-prefix-tlv" { when "../../../../../../../../../../../../../../" + "rt:type = 'ospf:ospfv3'" { description "This augmentation is only valid for OSPFv3 E-Router LSAs"; } uses ospfv3-prefix-sid-sub-tlvs; description "OSPFv3 Link-Scoped Intra-Area Prefix TLV."; } augment "/rt:routing/" + "rt:control-plane-protocols/rt:control-plane-protocol/" + "ospf:ospf/ospf:areas/ospf:area/ospf:database/" + "ospf:area-scope-lsa-type/ospf:area-scope-lsas/" + "ospf:area-scope-lsa/ospf:version/ospf:ospfv3/" + "ospf:ospfv3/ospf:body/ospfv3-e-lsa:e-intra-area-prefix/" + "ospfv3-e-lsa:e-intra-prefix-tlvs/" + "ospfv3-e-lsa:intra-prefix-tlv" { when "../../../../../../../../../../../../" + "rt:type = 'ospf:ospfv3'" { description "This augmentation is only valid for OSPFv3 E-Router LSAs"; } uses ospfv3-prefix-sid-sub-tlvs; description "OSPFv3 Area-Scoped Intra-Area Prefix TLV."; } /* Prefix SID Sub-TLV in Inter-Area Prefix TLV */ augment "/rt:routing/" + "rt:control-plane-protocols/rt:control-plane-protocol/" + "ospf:ospf/ospf:areas/ospf:area/ospf:database/" + "ospf:area-scope-lsa-type/ospf:area-scope-lsas/" + "ospf:area-scope-lsa/ospf:version/ospf:ospfv3/" + "ospf:ospfv3/ospf:body/ospfv3-e-lsa:e-inter-area-prefix/" + "ospfv3-e-lsa:e-inter-prefix-tlvs/" + "ospfv3-e-lsa:inter-prefix-tlv" { when "../../../../../../../../../../../../" + "rt:type = 'ospf:ospfv3'" { Lindem & Qu Expires 23 October 2022 [Page 15] Internet-Draft OSPFv3 SR YANG April 2022 description "This augmentation is only valid for OSPFv3 E-Router LSAs"; } uses ospfv3-prefix-sid-sub-tlvs; description "OSPFv3 Area-Scoped Inter-Area Prefix TLV."; } /* Prefix SID Sub-TLV in External Prefix TLV */ augment "/rt:routing/" + "rt:control-plane-protocols/rt:control-plane-protocol/" + "ospf:ospf/ospf:database/" + "ospf:as-scope-lsa-type/ospf:as-scope-lsas/" + "ospf:as-scope-lsa/ospf:version/ospf:ospfv3/" + "ospf:ospfv3/ospf:body/ospfv3-e-lsa:e-as-external/" + "ospfv3-e-lsa:e-external-tlvs/" + "ospfv3-e-lsa:external-prefix-tlv" { when "'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: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" { 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/" Lindem & Qu Expires 23 October 2022 [Page 16] Internet-Draft OSPFv3 SR YANG April 2022 + "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."; } } 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 [RFC8446]. The Network Configuration Access Control Model (NACM) [[RFC8341] provides the means to restrict access for particular NETCONF or RESTCONF users to a pre-configured subset of all available NETCONF or RESTCONF protocol operations and content. There are a number of data nodes defined in the 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. Lindem & Qu Expires 23 October 2022 [Page 17] Internet-Draft OSPFv3 SR YANG April 2022 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]. 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 [I-D.ietf-ospf-sr-yang] Yeung, D., Qu, Y., Zhang, J., Chen, I., and A. Lindem, "YANG Data Model for OSPF Segment Routing", Work in Progress, Internet-Draft, draft-ietf-ospf-sr-yang-17, 2 January 2022, . [I-D.ietf-ospf-yang] Yeung, D., Qu, Y., Zhang, J., Chen, I., and A. Lindem, "YANG Data Model for OSPF Protocol", Work in Progress, Lindem & Qu Expires 23 October 2022 [Page 18] Internet-Draft OSPFv3 SR YANG April 2022 Internet-Draft, draft-ietf-ospf-yang-29, 17 October 2019, . [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . [RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, DOI 10.17487/RFC3688, January 2004, . [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, . [RFC7950] Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language", RFC 7950, DOI 10.17487/RFC7950, August 2016, . [RFC8022] Lhotka, L. and A. Lindem, "A YANG Data Model for Routing Management", RFC 8022, DOI 10.17487/RFC8022, November 2016, . [RFC8040] Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF Protocol", RFC 8040, DOI 10.17487/RFC8040, January 2017, . [RFC8341] Bierman, A. and M. Bjorklund, "Network Configuration Access Control Model", STD 91, RFC 8341, DOI 10.17487/RFC8341, 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, . Lindem & Qu Expires 23 October 2022 [Page 19] Internet-Draft OSPFv3 SR YANG April 2022 [RFC8446] Rescorla, E., "The Transport Layer Security (TLS) Protocol Version 1.3", RFC 8446, DOI 10.17487/RFC8446, August 2018, . [RFC8666] Psenak, P., Ed. and S. Previdi, Ed., "OSPFv3 Extensions for Segment Routing", RFC 8666, DOI 10.17487/RFC8666, December 2019, . 7.2. Informative References [RFC8340] Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams", BCP 215, RFC 8340, DOI 10.17487/RFC8340, March 2018, . Authors' Addresses Acee Lindem Cisco Systems 301 Midenhall Way Cary, NC 27513 Email: acee@cisco.com Yingzhen Qu Futurewei 2330 Central Expressway Santa Clara, CA 95050 United States of America Email: yingzhen.qu@futurewei.com Lindem & Qu Expires 23 October 2022 [Page 20]