<?xmlversion="1.0" encoding="US-ASCII"?>version='1.0' encoding='UTF-8'?> <!DOCTYPE rfcSYSTEM "rfc2629.dtd"[ <!ENTITYRFC3688 PUBLIC '' 'http://xml.resource.org/public/rfc/bibxml/reference.RFC.3688.xml'>nbsp " "> <!ENTITYRFC6020 PUBLIC '' 'http://xml.resource.org/public/rfc/bibxml/reference.RFC.6020.xml'>zwsp "​"> <!ENTITYRFC6241 PUBLIC '' 'http://xml.resource.org/public/rfc/bibxml/reference.RFC.6241.xml'>nbhy "‑"> <!ENTITYRFC6242 PUBLIC '' 'http://xml.resource.org/public/rfc/bibxml/reference.RFC.6242.xml'> <!ENTITY RFC7950 PUBLIC '' 'http://xml.resource.org/public/rfc/bibxml/reference.RFC.7950.xml'> <!ENTITY RFC8040 PUBLIC '' 'http://xml.resource.org/public/rfc/bibxml/reference.RFC.8040.xml'> <!ENTITY RFC8340 PUBLIC '' 'http://xml.resource.org/public/rfc/bibxml/reference.RFC.8340.xml'> <!ENTITY RFC8341 PUBLIC '' 'http://xml.resource.org/public/rfc/bibxml/reference.RFC.8341.xml'> <!ENTITY RFC8342 PUBLIC '' 'http://xml.resource.org/public/rfc/bibxml/reference.RFC.8342.xml'> <!ENTITY RFC8349 PUBLIC '' 'http://xml.resource.org/public/rfc/bibxml/reference.RFC.8349.xml'> <!ENTITY RFC8446 PUBLIC '' 'http://xml.resource.org/public/rfc/bibxml/reference.RFC.8446.xml'> <!ENTITY RFC8476 PUBLIC '' 'http://xml.resource.org/public/rfc/bibxml/reference.RFC.8476.xml'> <!ENTITY RFC8491 PUBLIC '' 'http://xml.resource.org/public/rfc/bibxml/reference.RFC.8491.xml'> <!ENTITY RFC8662 PUBLIC '' 'http://xml.resource.org/public/rfc/bibxml/reference.RFC.8662.xml'> <!ENTITY RFC8960 PUBLIC '' 'http://xml.resource.org/public/rfc/bibxml/reference.RFC.8960.xml'> <!ENTITY RFC9088 PUBLIC '' 'http://xml.resource.org/public/rfc/bibxml/reference.RFC.9088.xml'> <!ENTITY RFC9110 PUBLIC '' 'http://xml.resource.org/public/rfc/bibxml/reference.RFC.9110.xml'> <!ENTITY RFC9352 PUBLIC '' 'http://xml.resource.org/public/rfc/bibxml/reference.RFC.9352.xml'>wj "⁠"> ]><?xml-stylesheet type='text/xsl' href='rfc2629.xslt' ?> <?rfc strict="no" ?> <?rfc toc="yes" ?> <?rfc symrefs="yes" ?> <?rfc sortrefs="yes"?> <?rfc rfcedstyle="yes" ?> <?rfc subcompact="no" ?><rfc xmlns:xi="http://www.w3.org/2001/XInclude" category="std" docName="draft-ietf-mpls-msd-yang-12"ipr="trust200902"> <!-- category values: std, bcp, info, exp, and historic ipr values: full3667, noModification3667, noDerivatives3667 you can add the attributes updates="NNNN" and obsoletes="NNNN" they will automatically be output with "(if approved)" --> <!-- ***** FRONT MATTER ***** -->number="9702" consensus="true" ipr="trust200902" obsoletes="" updates="" submissionType="IETF" xml:lang="en" tocInclude="true" symRefs="true" sortRefs="true" version="3"> <front><!-- The abbreviated title is used in the page header - it is only necessary if the full title is longer than 39 characters --><title abbrev="MPLS MSD YANG">YANG Data Model for MaximumSIDSegment Identifier (SID) Depth (MSD) Types and MPLSMaximum SID Depth </title> <!-- add 'role="editor"' below for the editors if appropriate --> <!-- Another author who claims to be an editor -->MSD</title> <seriesInfo name="RFC" value="9702"/> <author fullname="Yingzhen Qu" initials="Y" surname="Qu"> <organization>Futurewei Technologies</organization> <address> <email>yingzhen.ietf@gmail.com</email> </address> </author> <author fullname="Acee Lindem" initials="A." surname="Lindem"> <organization>LabN Consulting, L.L.C.</organization> <address> <email>acee.ietf@gmail.com</email> </address> </author> <author fullname="Stephane Litkowski" initials="S" surname="Litkowski"> <organization>Cisco Systems</organization> <address> <email>slitkows.ietf@gmail.com</email> </address> </author> <author fullname="Jeff Tantsura" initials="J" surname="Tantsura"> <organization>Nvidia</organization> <address> <email>jefftant.ietf@gmail.com</email> </address> </author><date/> <!-- If the month and year are both specified and are the current ones, xml2rfc will fill in the current day for you. If only the current year is specified, xml2rfc will fill in the current day and month for you. If the year is not the current one, it is necessary to specify at least a month (xml2rfc assumes day="1" if not specified for the purpose of calculating the expiry date). With drafts it is normally sufficient to specify just the year. --> <!-- Meta-data Declarations --> <area>General</area> <workgroup>MPLS Working Group</workgroup> <!-- WG name at the upperleft corner of the doc, IETF is fine for individual submissions. If this element is not present, the default is "Network Working Group", which is used by the RFC Editor as a nod to the history of the IETF. --> <!-- Keywords will be incorporated into HTML output files in a meta tag but they have no effect on text or nroff output. If you submit your draft to the RFC Editor, the keywords will be used for the search engine. --><date month="December" year="2024"/> <area>RTG</area> <workgroup>mpls</workgroup> <keyword>example</keyword> <abstract><t>This<t> This document defines two YANGdatamodules. The first module is the initial version of the IANA-maintained YANG module for Maximum Segment Identifier (SID)Depths (MSDs)Depth (MSD) Types, which includes identities for both the MPLS data plane andSRv6Segment Routing over IPv6 (SRv6) dataplanes.plane. The second module augments the IETF MPLS YANG data model to provide support for MPLS MSDs as defined inRFCRFCs 8476 andRFC 8491. </t>8491.</t> </abstract> </front> <middle> <sectiontitle="Overview">numbered="true" toc="default"> <name>Overview</name> <t>There are two YANG modules <xref target="RFC7950"/> defined in this document. Module iana-msd-types defines the identities for MaximumSegment Identifier (SID)SID Depth (MSD) Types as per the "IGP MSD-Types" IANAIGP MSD-Typesregistry <xreftarget="IANA-IGP-MSD-Types"/>,target="IANA-IGP-MSD-Types" format="default"/>, whichincludeincludes MSD types for both the MPLSdata planeandtheSRv6 dataplane.planes. This document also defines module ietf-mpls-msd augmenting the IETF MPLS YANG data model <xreftarget="RFC8960"/>,target="RFC8960" format="default"/>, whichitselfaugments the routing RIB data model <xreftarget="RFC8349"/>,target="RFC8349" format="default"/> to provide operational state for variousMSDs<xref target="RFC8662"/>MSDs <xref target="RFC8662" format="default"/> for the MPLS data plane. The module augments the base MPLS model with a list of various types ofnode MSDs,Node MSDs as well as various types ofMSDs on links.Link MSDs. </t> <t> The YANG modules in this document conform to the Network Management Datastore Architecture (NMDA) <xreftarget="RFC8342"/>.target="RFC8342" format="default"/>. </t> </section> <sectiontitle="Designnumbered="true" toc="default"> <name>Design of theModel">Model</name> <sectiontitle="IANAnumbered="true" toc="default"> <name>IANA MSD TypesModule">Module</name> <t> IANA has createdan IANA-manageda registry titled "IGP MSD-Types" under the "Interior Gateway Protocol (IGP) Parameters" registry group to identify MSD-Types. Module iana-msd-types is an IANA-maintained module, which defines the identities for the MSD-Types as in the IANAIGP MSD-Types"IGP MSD-Types" registry. This module references <xref target="RFC8476"/>, <xref target="RFC8491"/>, <xref target="RFC8662"/>, <xref target="RFC8664"/>, <xref target="RFC8814"/>, <xref target="RFC9088"/>, and <xref target="RFC9352"/>. </t> <t> On top of the base identity "msd-base", identity "msd-base-mpls" is defined to serve as the base for MSD types for the MPLS data plane, and identity "msd-base-srh" is defined to serve as the base for MSD types for the Segment Routing Header (SRH) in the IPv6 data plane. </t> <t> This modulewill beis maintained by IANA and will be updated if and when there is any change to the registry. </t> </section> <sectiontitle="IETFnumbered="true" toc="default"> <name>IETF MPLS MSDModule">Module</name> <t> Module ietf-mpls-msd augments the base MPLS model <xreftarget="RFC8960"/>,target="RFC8960" format="default"/>, and it provides support of different types of MSDs in the MPLS data plane. </t> <t> As defined in <xreftarget="RFC8491"/>,target="RFC8491" format="default"/>, a Link MSD is the number of SIDs supported by a node's link, while a Node MSD is the smallest MSD supported by the node across all itsinterfaces.links. The module defines lists of MSDswith differentand their MSD Types for a node and its links. Please note that these are read-only dataas per thenodes exposing a node's hardware capability. </t> </section> </section> <sectiontitle="Treenumbered="true" toc="default"> <name>Tree for IETF MPLS MSD Types YANGModule">Module</name> <t> This document uses the graphical representation of data models per <xreftarget="RFC8340"/>.target="RFC8340" format="default"/>. </t><figure align="left"> <artwork align="left"><sourcecode name="" type="yangtree"> module: ietf-mpls-msd augment /rt:routing/mpls:mpls: +--ro node-msds +--ro node-msd* [msd-type] +--ro msd-type identityref +--ro msd-value? uint8 augment /rt:routing/mpls:mpls/mpls:interfaces/mpls:interface: +--ro link-msds +--ro link-msd* [msd-type] +--ro msd-type identityref +--ro msd-value? uint8</artwork> </figure></sourcecode> </section> <sectiontitle="YANG Modules">numbered="true" toc="default"> <name>YANG Modules</name> <t>There are two YANG modules defined in this document.</t> <section anchor="iana-msd-types"title="IANA-Maintainednumbered="true" toc="default"> <name>IANA-Maintained Module forMSD-Types">MSD-Types</name> <t>This document defines the initial version of the IANA-maintained YANG module for MSDTypes, whichTypes that mirrors the IANAIGP MSD-Types"IGP MSD-Types" registry <xreftarget="IANA-IGP-MSD-Types"/>.target="IANA-IGP-MSD-Types" format="default"/>. </t><t> <figure> <artwork><![CDATA[ <CODE BEGINS> file "iana-msd-types@2024-07-04.yang"<!--[rfced] We note that two RFCs in the reference clauses in the iana-msd-types module do not appear in the reference section of the RFC. May a sentence be added before the YANG module stating that it refers to the following RFCs? For example: This module references [RFC8476], [RFC8491], [RFC8662], [RFC8664], [RFC8814], [RFC9088], and [RFC9352]. (where [RFC8664] and [RFC8814] would be added as Informative References) Alternatively, you could let us know a different place to cite [RFC8664] and [RFC8814] in this document. --> <sourcecode name="iana-msd-types@2024-07-04.yang" type="yang" markers="true"><![CDATA[ module iana-msd-types { yang-version 1.1; namespace "urn:ietf:params:xml:ns:yang:iana-msd-types"; prefix iana-msd-types; organization "Internet Assigned Numbers Authority (IANA)"; contact "Internet Assigned Numbers Authority ICANN 12025 Waterfront Drive, Suite 300 Los Angeles, CA 90094-2536 United States of America Tel: +1 310 301 5800 <mailto:iana@iana.org>"; description "The YANG module defines the identities for Maximum Segment Identifier (SID) Depth (MSD) Types. This YANG module is maintained by IANA and reflects the 'IGP MSD-Types' registry. Copyright (c) 2024 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 initial version of this YANG module is part of RFCXXXX (https://www.rfc-editor.org/info/rfcXXXX);9702 (https://www.rfc-editor.org/info/rfc9702); see the RFC itself for full legal notices.//RFC Ed.: replace XXXX with actual RFC number and remove this note //RFC Ed.: replace IANA_FOO_URL and remove this note.The latest version of this YANG module is available at<IANA_FOO_URL>.";https://www.iana.org/assignments/yang-parameters."; revision 2024-07-04 { description "Initial Version"; reference "RFCXXXX:9702: YANG Data Model for MaximumSIDSegment Identifier (SID) Depth Types and MPLS Maximum SID Depth"; } identity msd-base { description "Base identity for Maximum SID Depth (MSD) Type. The MSD type definition is defined in the IANAIGP MSD-Types'IGP MSD-Types' registry."; } identity msd-base-mpls { base msd-base; description "Base identity of MSD types for the MPLS data plane."; } identity base-mpls-imposition-msd { base msd-base-mpls; description "Base MPLS Imposition MSD."; reference "RFC 8491: Signaling Maximum SID Depth (MSD)usingUsing IS-IS RFC 8476: Signaling Maximum SID Depth (MSD)usingUsing OSPF RFC 8664: Path Computation Element Communication Protocol (PCEP) Extensions for Segment Routing RFC 8814: Signaling Maximum SID Depth (MSD) Using the Border Gateway Protocol - Link State"; } identity erld-msd { base msd-base-mpls; description "msd-erld is defined to advertise the Entropy Readable Label Depth (ERLD)."; reference "RFC 8662: Entropy Label for Source Packet Routing in Networking (SPRING) Tunnels RFC 9088: Signaling Entropy Label Capability and Entropy Readable Label Depth Using IS-IS"; } identity msd-base-srh { base msd-base; description "Base identity of MSD types for Segment Routing Header (SRH)."; } identity srh-max-sl { base msd-base-srh; description "The MaximumSegmentSegments Left MSD type."; reference "RFC 9352: IS-IS Extensions to Support Segment Routing over the IPv6 Data Plane"; } identity srh-max-end-pop { base msd-base-srh; description "The Maximum End Pop MSD Type."; reference "RFC 9352: IS-IS Extensions to Support Segment Routing over the IPv6 Data Plane"; } identity srh-max-h-encaps { base msd-base-srh; description "The Maximum H.Encaps MSD Type."; reference "RFC 9352: IS-IS Extensions to Support Segment Routing over the IPv6 Data Plane"; } identity srh-max-end-d { base msd-base-srh; description "The Maximum End D MSD Type."; reference "RFC 9352: IS-IS Extensions to Support Segment Routing over the IPv6 Data Plane"; } }<CODE ENDS> ]]></artwork> </figure></t>]]></sourcecode> </section> <sectiontitle="MPLSnumbered="true" toc="default"> <name>MPLS MSDYANG">YANG</name> <t>This document also defines a YANG module for MSD extensions <xreftarget="RFC8476"/><xref target="RFC8491"/>target="RFC8476" format="default"/> <xref target="RFC8491" format="default"/> to the MPLS base model as defined in <xreftarget="RFC8960"/>.target="RFC8960" format="default"/>. </t><t> <figure> <artwork><![CDATA[ <CODE BEGINS> file "ietf-mpls-msd@2024-07-05.yang"<sourcecode name="ietf-mpls-msd@2024-07-05.yang" type="yang" markers="true"><![CDATA[ module ietf-mpls-msd { yang-version 1.1; namespace "urn:ietf:params:xml:ns:yang:ietf-mpls-msd"; prefix mpls-msd; import ietf-routing { prefix rt; reference "RFC 8349: A YANG Data Model for Routing Management (NMDA Version)"; } import ietf-mpls { prefix mpls; reference "RFC 8960: A YANG Data Model for MPLS Base"; } import iana-msd-types { prefix iana-msd-types; } organization "IETF Multiprotocol Label Switching (MPLS) Working Group"; contact "WG Web: <https://datatracker.ietf.org/wg/mpls/> WG List: <mailto:mpls@ietf.org> Author: Yingzhen Qu <mailto:yingzhen.ietf@gmail.com> Author: Acee Lindem <mailto:acee.ietf@gmail.com> Author: Stephane Litkowski <mailto:slitkows.ietf@gmail.com> Author: Jeff Tantsura <mailto:jefftant.ietf@gmail.com> "; description"The"This YANG module augments the base MPLS model, and it is to provide support for different types of Maximum SID Depth (MSD). This YANGmodelmodule conforms to the Network Management Datastore Architecture (NMDA) as described in RFC 8342. Copyright (c) 2024 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 RFCXXXX;9702; see the RFC itself for full legal notices."; revision 2024-07-05 { description "Initial Version"; reference "RFCXXXX:9702: YANG Data Model for MaximumSIDSegment Identifier (SID) Depth Types and MPLS Maximum SID Depth"; } grouping msd-type-value { description "Grouping for MSD type and value."; leaf msd-type { type identityref { base iana-msd-types:msd-base-mpls; } description "MSD types. The MSD type is defined in IANAIGP MSD-Types'IGP MSD-Types' registry."; } leaf msd-value { type uint8; description "MSD value, in the range of 0-255. 0 represents the lack of ability to support a SID stack of any depth."; } } augment "/rt:routing/mpls:mpls" { description "This module augments MPLS data model (RFC 8960) withnodeNode MSD."; container node-msds { config false; description "Maximum SID Depth (MSD) of a node."; list node-msd { key "msd-type"; uses msd-type-value; description "List of different types ofnodeNode MSDs. For the same type, the value ofnodeNode MSD is the smallest amonglinkLink MSD values."; } } } augment "/rt:routing/mpls:mpls/mpls:interfaces/mpls:interface" { description "This module augments MPLS data model (RFC 8960) withlinkLink MSD."; container link-msds { config false; description "Maximum SID Depth (MSD) of an interface."; list link-msd { key "msd-type"; uses msd-type-value; description "List of different types of MSDs on the link."; } } } }<CODE ENDS> ]]></artwork> </figure> </t>]]></sourcecode> </section> </section> <section anchor="Security"title="Security Considerations">numbered="true" toc="default"> <name>Security Considerations</name> <t> <!-- DNE begins--> 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 <xreftarget="RFC6241"/>target="RFC6241" format="default"/> or RESTCONF <xreftarget="RFC8040"/>. These network management protocols are required to use atarget="RFC8040" format="default"/>. The lowest NETCONF layer is the secure transportlayerlayer, andmutual authentication, e.g., SSH <xref target="RFC6242"/> withoutthe"none" authentication option, Transport Layer Security (TLS)mandatory-to-implement secure transport is Secure Shell (SSH) <xreftarget="RFC8446"/> with mutual X.509 authentication,target="RFC6242" format="default"/>. The lowest RESTCONF layer is HTTPS, andHTTPS with HTTP authentication (Section 11 ofthe mandatory-to-implement secure transport is TLS <xreftarget="RFC9110"/>).</t>target="RFC8446" format="default"/>.</t> <t>TheNETCONFNetwork Configuration Access Control Model (NACM) <xreftarget="RFC8341"/>target="RFC8341" format="default"/> 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.</t> <!-- DNE ends --> <t>Some of the readable data nodes in the ietf-mpls-msd YANG 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. These are the subtrees and data nodes and their sensitivity/vulnerability:<list style="empty"> <t>/rt:routing/mpls:mpls/msd/node-msds</t> <t>/rt:routing/mpls:mpls/msd/link-msds</t> <t>Exposure</t> <t indent="3">/rt:routing/mpls:mpls/msd/node-msds</t> <t indent="3">/rt:routing/mpls:mpls/msd/link-msds</t> <t indent="3">Exposure of the node's maximum SID depth may be useful in mounting a Denial-of-Service (DoS) attack by sending packets to the node that the router can't process.</t></list></t><t> The iana-msd-types YANG module defines a set ofidentities, which mirrorsidentities that mirror the IANAIGP MSD-Types"IGP MSD-Types" registry. These identities are intended to be reused by other YANG modules. The module by itself does not expose any data nodes that are writable or readable. As such, there are no additional security issues related to this YANG module that need to be considered. </t> </section> <sectiontitle="IANA Considerations">numbered="true" toc="default"> <name>IANA Considerations</name> <sectiontitle="Registeringnumbered="true" toc="default"> <name>Registering YANGModules">Modules</name> <t>This document registers URIs in the IETF XML registry<xref target="RFC3688"/>. Following the formatas defined in <xreftarget="RFC3688"/>, thetarget="RFC3688" format="default"/>. The following registrationsare requested to behave been made:<figure> <artwork> URI: urn:ietf:params:xml:ns:yang:iana-msd-types Registrant Contact: The IESG. XML: N/A,</t> <dl spacing="compact"> <dt>URI:</dt><dd>urn:ietf:params:xml:ns:yang:iana-msd-types</dd> <dt>Registrant Contact:</dt><dd>The IESG.</dd> <dt>XML:</dt><dd>N/A; the requested URI is an XMLnamespace. </artwork> </figure> <figure> <artwork> URI: urn:ietf:params:xml:ns:yang:ietf-mpls-msd Registrant Contact: The IESG. XML: N/A,namespace.</dd> </dl> <dl spacing="compact"> <dt>URI:</dt><dd>urn:ietf:params:xml:ns:yang:ietf-mpls-msd</dd> <dt>Registrant Contact:</dt><dd>The IESG.</dd> <dt>XML:</dt><dd>N/A; the requested URI is an XMLnamespace. </artwork> </figure> </t>namespace.</dd> </dl> <t>This document registers the YANG modules in theYANG"YANG ModuleNamesNames" registry as defined in <xreftarget="RFC6020"/>. <figure> <figure> <artwork> name: iana-msd-types Maintainedtarget="RFC6020" format="default"/>. </t> <dl spacing="compact"> <dt>Name:</dt><dd>iana-msd-types</dd> <dt>Maintained byIANA? Y namespace: urn:ietf:params:xml:ns:yang:iana-msd-types prefix: iana-msd-types reference: RFC XXXX </artwork> </figure> <artwork> name: ietf-mpls-msd MaintainedIANA?</dt><dd>Y</dd> <dt>Namespace:</dt><dd>urn:ietf:params:xml:ns:yang:iana-msd-types</dd> <dt>Prefix:</dt><dd>iana-msd-types</dd> <dt>Reference:</dt><dd>RFC 9702</dd> </dl> <dl spacing="compact"> <dt>Name:</dt><dd>ietf-mpls-msd</dd> <dt>Maintained byIANA? N namespace: urn:ietf:params:xml:ns:yang:ietf-mpls-msd prefix: mpls-msd reference: RFC XXXX </artwork> </figure> </t>IANA?</dt><dd>N</dd> <dt>Namespace:</dt><dd>urn:ietf:params:xml:ns:yang:ietf-mpls-msd</dd> <dt>Prefix:</dt><dd>mpls-msd</dd> <dt>Reference:</dt><dd>RFC 9702</dd> </dl> </section> <sectiontitle="IANAnumbered="true" toc="default"> <name>IANA MSD-TypesModule">Module</name> <t>This document defines the initial version of the IANA-maintained "iana-msd-types" YANG module<xref target="iana-msd-types"/>.(<xref target="iana-msd-types" format="default"/>). The latest version of the YANG module is available from the "YANG Parameters" registry <xreftarget="IANA-YANG-Parameters"/>.</t>target="IANA-YANG-Parameters" format="default"/>.</t> <t> IANAis requested to addhas added this note to the "YANG Module Names" registry:<list style="empty"> <t>MSD Types</t> <blockquote> <t>New values must not beaddeddirectly added to theiana-msd-types"iana-msd-types" YANG module. They mustfirstinstead be added to the "IGP MSD-Types" registry in the "Interior Gateway Protocol (IGP) Parameters" registry group <xreftarget="IANA-IGP-MSD-Types"/>, which it mirrors.</t> </list></t>target="IANA-IGP-MSD-Types" format="default"/>.</t> </blockquote> <t> The identities defined in the iana-msd-types YANG module are organized hierarchically based on the data plane. In this initial version, only MPLS and SRv6 data planes are supported, hence "msd-base-mpls" and "msd-base-srh" are defined. When a new data plane is added to the "IGP MSD-Types" registry, a new "identity" statement should be added to the "iana-msd-types" YANG module. The name of the "identity" is the prefix "msd-base-" plus alower-caselowercase version of the data planename .name. The identity statement should have the following sub-statements defined:</t> <dl newline="false"spacing="normal" indent="15">spacing="normal"> <dt>"base":</dt> <dd>Contains 'msd-base'.</dd> <dt>"description":</dt> <dd>Replicates the description from "msd-base-mpls" andchangechanges the corresponding data plane name.</dd> <dt>"reference":</dt> <dd>Replicates the reference from the registry with the title of the document added.</dd> </dl> <t> When an MSD type is added to the "IGP MSD-Types" registry, a new "identity" statement must be added to the "iana-msd-types" YANG module.ThenThe name of the "identity" is alower-caselowercase version of the type name provided in the name with the space replaced with "-". The "identity" statement should have the following sub-statements defined:</t> <dl newline="false"spacing="normal" indent="15">spacing="normal"> <dt>"base":</dt> <dd>Contains the base name of the corresponding data plane.</dd> <dt>"description":</dt> <dd>Replicates the name from the registry.</dd> <dt>"reference":</dt> <dd>Replicates the reference from the registry with the title of the document added.</dd> </dl> <t>Unassigned or reserved values are not present in the module.</t> <t>When the "iana-msd-types" YANG module is updated, a new "revision" statement with a unique revision date must be added in front of the existing revision statements.</t><t><!--[rfced] We suggest naming the column "Data Plane" no hyphen, as the hyphen seems unnecessary. If you agree, we will ask IANAis requestedto update theaddregistry accordingly. Current: IANA has added a "Data-Plane" column Suggested: IANA has added a"data-plane""Data Plane" column [and other instances] --> <t> IANA has added a "Data Plane" column to the "IGP MSD-Types" registry. This will unequivocally identify the base identity for MSD-Types. The values for theData-Plane"Data Plane" column for existing MSD-Types are: </t><artwork> Value Name Data-Plane Reference 0 Reserved N/A [RFC8491] 1 Base<table anchor="tab-1"> <thead> <tr> <th>Value</th> <th>Name</th> <th>Data Plane</th> <th>Reference</th> </tr> </thead> <tbody> <tr> <td>0</td> <td>Reserved</td> <td></td> <td><xref target="RFC8491"/></td> </tr> <tr> <td>1</td> <td>Base MPLS ImpositionMSD MPLS [RFC8491] 2 ERLD-MSD MPLS [RFC9088] 3-40 Unassigned N/A 41 SRHMSD</td> <td>MPLS</td> <td><xref target="RFC8491"/></td> </tr> <tr> <td>2</td> <td>ERLD-MSD</td> <td>MPLS</td> <td><xref target="RFC9088"/></td> </tr> <tr> <td>3-40</td> <td>Unassigned</td> <td></td> <td></td> </tr> <tr> <td>41</td> <td>SRH MaxSL SRv6 [RFC9352] 42 SRHSL</td> <td>SRv6</td> <td><xref target="RFC9352"/></td> </tr> <tr> <td>42</td> <td>SRH Max EndPop SRv6 [RFC9352] 43 Unassigned N/A 44 SRHPop</td> <td>SRv6</td> <td><xref target="RFC9352"/></td> </tr> <tr> <td>43</td> <td>Unassigned</td> <td></td> <td></td> </tr> <tr> <td>44</td> <td>SRH MaxH.encaps SRv6 [RFC9352] 45 SRHH.encaps</td> <td>SRv6</td> <td><xref target="RFC9352"/></td> </tr> <tr> <td>45</td> <td>SRH MaxEnd SRv6 [RFC9352] 46-250 Unassigned N/A 251-254 Experimental Use N/A [RFC8491] 255 Reserved N/A [RFC8491] </artwork>End</td> <td>SRv6</td> <td><xref target="RFC9352"/></td> </tr> <tr> <td>46-250</td> <td>Unassigned</td> <td></td> <td></td> </tr> <tr> <td>251-254</td> <td>Experimental Use</td> <td></td> <td><xref target="RFC8491"/></td> </tr> <tr> <td>255</td> <td>Reserved</td> <td></td> <td><xref target="RFC8491"/></td> </tr> </tbody> </table> <t> IANAis requested to addhas added this note to <xreftarget="IANA-IGP-MSD-Types"/>: <list style="empty">target="IANA-IGP-MSD-Types" format="default"/>: </t> <blockquote> <t>When this registry is modified, the YANG module "iana-msd-types" must be updated as defined in RFCXXXX.</t> </list> </t>9702.</t> </blockquote> </section> </section><section anchor="Acknowledgements" title="Acknowledgements"> <t>This document was produced using Marshall Rose's xml2rfc tool.</t> <t>The YANG model was developed using the suite of YANG tools written and maintained by numerous authors.</t> <t>We would like to thank Jan Lindblad, Tom Petch, Dhruv Dhody, Mohamed Boucadair and Susan Hares for their reviews and comments.</t> </section></middle><!-- *****BACK MATTER ***** --><back> <references> <name>References</name> <references> <name>Normative References</name> <xi:include href="https://bib.ietf.org/public/rfc/bibxml/reference.RFC.3688.xml"/> <xi:include href="https://bib.ietf.org/public/rfc/bibxml/reference.RFC.6020.xml"/> <xi:include href="https://bib.ietf.org/public/rfc/bibxml/reference.RFC.6241.xml"/> <xi:include href="https://bib.ietf.org/public/rfc/bibxml/reference.RFC.6242.xml"/> <xi:include href="https://bib.ietf.org/public/rfc/bibxml/reference.RFC.7950.xml"/> <!--References split into informative and normative --> <!-- There are 2 ways to insert reference entries from the citation libraries: 1. define an ENTITY at the top, and use "ampersand character"RFC2629; here (as shown) 2. simply use a PI "less than character"?rfc include="reference.RFC.2119.xml"?> here (for I-Ds: include="reference.I-D.narten-iana-considerations-rfc2434bis.xml") Both are[rfced] RFC 7950 is not citedtextually in the same manner: by using xref elements. If you use the PI option, xml2rfc will, by default, try to find included filesanywhere inthe same directory as the including file. You can also define the XML_LIBRARY environment variable with a value containing a set of directories to search. These canthis document. Please let us know where it should beeither incited; otherwise, this reference will be removed from thelocal filing system or remote ones accessed by http (http://domain/dir/... ).--> <references title="Normative References"> <!--?rfc include="http://xml.resource.org/public/rfc/bibxml/reference.RFC.2119.xml"?--> &RFC3688; &RFC6020; &RFC6241; &RFC6242; &RFC7950; &RFC8040; &RFC8341; &RFC8342; &RFC8349; &RFC8446; &RFC8476; &RFC8491; &RFC8960; &RFC9088; &RFC9110; &RFC9352;Normative References. Original: [RFC7950] Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language", RFC 7950, DOI 10.17487/RFC7950, August 2016, <https://www.rfc-editor.org/info/rfc7950>. --> <xi:include href="https://bib.ietf.org/public/rfc/bibxml/reference.RFC.8040.xml"/> <xi:include href="https://bib.ietf.org/public/rfc/bibxml/reference.RFC.8341.xml"/> <xi:include href="https://bib.ietf.org/public/rfc/bibxml/reference.RFC.8342.xml"/> <xi:include href="https://bib.ietf.org/public/rfc/bibxml/reference.RFC.8349.xml"/> <xi:include href="https://bib.ietf.org/public/rfc/bibxml/reference.RFC.8446.xml"/> <xi:include href="https://bib.ietf.org/public/rfc/bibxml/reference.RFC.8476.xml"/> <xi:include href="https://bib.ietf.org/public/rfc/bibxml/reference.RFC.8491.xml"/> <xi:include href="https://bib.ietf.org/public/rfc/bibxml/reference.RFC.8960.xml"/> <xi:include href="https://bib.ietf.org/public/rfc/bibxml/reference.RFC.9088.xml"/> <!-- <xi:include href="https://bib.ietf.org/public/rfc/bibxml/reference.RFC.9110.xml"/> --> <xi:include href="https://bib.ietf.org/public/rfc/bibxml/reference.RFC.9352.xml"/> <reference anchor="IANA-IGP-MSD-Types"target="https://www.iana.org/assignments/igp-parameters/igp-parameters.xhtml#igp-msd-types" quoteTitle="true" derivedAnchor="IANA-IGP-MSD-Types">target="https://www.iana.org/assignments/igp-parameters"> <front> <title>IGP MSD-Types</title> <author><organization showOnFrontPage="true">IANA</organization><organization>IANA</organization> </author> <date/> </front> </reference> <reference anchor="IANA-YANG-Parameters"target="https://www.iana.org/assignments/yang-parameters" quoteTitle="true" derivedAnchor="IANA-YANG-Parameters">target="https://www.iana.org/assignments/yang-parameters"> <front> <title>YANG Module Names</title> <author><organization showOnFrontPage="true">IANA</organization><organization>IANA</organization> </author> <date/> </front> </reference> </references><references title="Informative References"> <!-- Here we use entities that we defined at the beginning. --> &RFC8340; &RFC8662;<references> <name>Informative References</name> <xi:include href="https://bib.ietf.org/public/rfc/bibxml/reference.RFC.8340.xml"/> <xi:include href="https://bib.ietf.org/public/rfc/bibxml/reference.RFC.8662.xml"/> <xi:include href="https://bib.ietf.org/public/rfc/bibxml/reference.RFC.8664.xml"/> <xi:include href="https://bib.ietf.org/public/rfc/bibxml/reference.RFC.8814.xml"/> </references> </references> <section anchor="Acknowledgements" numbered="false" toc="default"> <name>Acknowledgements</name> <t>The YANG data model was developed using the suite of YANG tools written and maintained by numerous authors.</t> <t>We would like to thank <contact fullname="Jan Lindblad"/>, <contact fullname="Tom Petch"/>, <contact fullname="Dhruv Dhody"/>, <contact fullname="Mohamed Boucadair"/>, and <contact fullname="Susan Hares"/> for their reviews and comments.</t> </section> </back> </rfc>