Network Working Group A. Lindem Internet-Draft Cisco Systems Intended status: Standards Track Y. Qu Expires: December 27, 2020 Futurewei June 25, 2020 RIB YANG Data Model draft-ietf-rtgwg-yang-rib-extend-04 Abstract The Routing Information Base (RIB) is a list of routes and their corresponding administrative data and operational state. RFC 8349 defines the basic building blocks for RIB, and this model augments it to support multiple next-hops (aka, paths) for each route as well as additional attributes. 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 December 27, 2020. Copyright Notice Copyright (c) 2020 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of Lindem & Qu Expires December 27, 2020 [Page 1] Internet-Draft YANG RIB June 2020 the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Terminology and Notation . . . . . . . . . . . . . . . . . . 3 2.1. Glossary of New Terms . . . . . . . . . . . . . . . . . . 4 2.2. Tree Diagrams . . . . . . . . . . . . . . . . . . . . . . 4 2.3. Prefixes in Data Node Names . . . . . . . . . . . . . . . 4 3. Design of the Model . . . . . . . . . . . . . . . . . . . . . 4 3.1. RIB Tags and Preference . . . . . . . . . . . . . . . . . 5 3.2. Multiple next-hops . . . . . . . . . . . . . . . . . . . 5 3.3. Repair path . . . . . . . . . . . . . . . . . . . . . . . 5 4. RIB Model Tree . . . . . . . . . . . . . . . . . . . . . . . 5 5. RIB YANG Model . . . . . . . . . . . . . . . . . . . . . . . 6 6. Security Considerations . . . . . . . . . . . . . . . . . . . 14 7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 14 8. References . . . . . . . . . . . . . . . . . . . . . . . . . 15 8.1. Normative References . . . . . . . . . . . . . . . . . . 15 8.2. Informative References . . . . . . . . . . . . . . . . . 16 Appendix A. Combined Tree Diagram . . . . . . . . . . . . . . . 16 Appendix B. ietf-rib-extension.yang example . . . . . . . . . . 20 Appendix C. Acknowledgments . . . . . . . . . . . . . . . . . . 22 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 22 1. Introduction This document defines a YANG, [RFC6020][RFC7950], data model which extends the generic data model for RIB by augmenting the ietf-routing model as defined in [RFC8349]. RIB is a collection of best routes from all routing protocols. Within a protocol routes are selected based on the metrics in use by that protocol, and the protocol install its best routes to RIB. RIB selects the best route by comparing the route preference (aka, administrative distance) of the associated protocol. The augmentations described herein extend the RIB to support multiple paths per route, route metrics, and administrative tags. The YANG modules in this document conform to the Network Management Datastore Architecture (NMDA) [RFC8342]. Lindem & Qu Expires December 27, 2020 [Page 2] Internet-Draft YANG RIB June 2020 2. Terminology and Notation 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. The following terms are defined in [RFC8342]: o client o server o configuration o system state o operational state o intended configuration The following terms are defined in [RFC7950]: o action o augment o container o container with presence o data model o data node o feature o leaf o list o mandatory node o module o schema tree Lindem & Qu Expires December 27, 2020 [Page 3] Internet-Draft YANG RIB June 2020 o RPC (Remote Procedure Call) operation 2.1. Glossary of New Terms Routing Information Base (RIB): An object containing a list of routes, together with other information. See [RFC8349] Section 5.2 for details. 2.2. Tree Diagrams Tree diagrams used in this document follow the notation defined in [RFC8340]. 2.3. Prefixes in Data Node Names In this document, names of data nodes, actions, and other data model objects are often used without a prefix, as long as it is clear from the context in which YANG module each name is defined. Otherwise, names are prefixed using the standard prefix associated with the corresponding YANG module, as shown in Table 1. +--------+---------------------------+-----------+ | Prefix | YANG module | Reference | +--------+---------------------------+-----------+ | if | ietf-interfaces | [RFC8343] | | | | | | rt | ietf-routing | [RFC8349] | | | | | | v4ur | ietf-ipv4-unicast-routing | [RFC8349] | | | | | | v6ur | ietf-ipv6-unicast-routing | [RFC8349] | | | | | | inet | ietf-inet-types | [RFC6991] | +--------+---------------------------+-----------+ Table 1: Prefixes and Corresponding YANG Modules 3. Design of the Model The YANG definitions in this document augment the ietf-routing model defined in [RFC8349], which provides a basis for routing system data model development. Together with modules defined in [RFC8349], a generic RIB Yang model is defined to implement and monitor a RIB. The models in [RFC8349] also define the basic configuration and operational state for both IPv4 and IPv6 static routes and this document also provides augmentations for static routes to support multiple next-hop and more next-hop attributes. Lindem & Qu Expires December 27, 2020 [Page 4] Internet-Draft YANG RIB June 2020 3.1. RIB Tags and Preference Individual routes tags will be supported at both the route and next- hop level. A preference per next-hop is also supported for selection of the most preferred reachable static route. 3.2. Multiple next-hops Both Ipv4 and IPv6 static route configuration defined in [RFC8349] have been augmented with a multi-next-hop option. A static route/prefix can be configured to have multiple next-hops, each with their own tag and route preference. In RIB, a route may have multiple next-hops. They can be either equal cost multiple paths (ECMP), or they may have different metrics. 3.3. Repair path The IP Fast Reroute (IPFRR) pre-computes repair paths by routing protocols [RFC5714], and the best repair path is installed in RIB. A repair path is augmented in RIB operation state for each path. 4. RIB Model Tree The tree associated with the "ietf-rib-extension" module follows. The meaning of the symbols can be found in [RFC8340]. The ietf- routing.yang tree with the augmentations herein is included in Appendix A. module: ietf-rib-extension augment /rt:routing/rt:control-plane-protocols /rt:control-plane-protocol/rt:static-routes/v4ur:ipv4 /v4ur:route/v4ur:next-hop/v4ur:next-hop-options /v4ur:simple-next-hop: +--rw preference? uint32 +--rw tag? uint32 augment /rt:routing/rt:control-plane-protocols /rt:control-plane-protocol/rt:static-routes/v4ur:ipv4 /v4ur:route/v4ur:next-hop/v4ur:next-hop-options /v4ur:next-hop-list/v4ur:next-hop-list/v4ur:next-hop: +--rw preference? uint32 +--rw tag? uint32 augment /rt:routing/rt:control-plane-protocols /rt:control-plane-protocol/rt:static-routes/v6ur:ipv6 /v6ur:route/v6ur:next-hop/v6ur:next-hop-options /v6ur:simple-next-hop: Lindem & Qu Expires December 27, 2020 [Page 5] Internet-Draft YANG RIB June 2020 +--rw preference? uint32 +--rw tag? uint32 augment /rt:routing/rt:control-plane-protocols /rt:control-plane-protocol/rt:static-routes/v6ur:ipv6 /v6ur:route/v6ur:next-hop/v6ur:next-hop-options /v6ur:next-hop-list/v6ur:next-hop-list/v6ur:next-hop: +--rw preference? uint32 +--rw tag? uint32 augment /rt:routing/rt:ribs/rt:rib: +--ro rib-summary-statistics +--ro total-routes? uint32 +--ro total-active-routes? uint32 +--ro total-route-memory? uint64 +--ro protocol-rib-statistics* [] +--ro rib-protocol? identityref +--ro protocol-total-routes? uint32 +--ro protocol-active-routes? uint32 +--ro protocol-route-memory? uint64 augment /rt:routing/rt:ribs/rt:rib/rt:routes/rt:route: +--ro metric? uint32 +--ro tag? uint32 +--ro application-tag? uint32 augment /rt:routing/rt:ribs/rt:rib/rt:routes/rt:route /rt:next-hop/rt:next-hop-options/rt:simple-next-hop: +--ro repair-path +--ro outgoing-interface? if:interface-state-ref +--ro next-hop-address? inet:ip-address +--ro metric? uint32 augment /rt:routing/rt:ribs/rt:rib/rt:routes/rt:route /rt:next-hop/rt:next-hop-options/rt:special-next-hop: +--ro repair-path +--ro outgoing-interface? if:interface-state-ref +--ro next-hop-address? inet:ip-address +--ro metric? uint32 augment /rt:routing/rt:ribs/rt:rib/rt:routes/rt:route /rt:next-hop/rt:next-hop-options/rt:next-hop-list /rt:next-hop-list/rt:next-hop: +--ro repair-path +--ro outgoing-interface? if:interface-state-ref +--ro next-hop-address? inet:ip-address +--ro metric? uint32 5. RIB YANG Model file "ietf-rib-extension@2020-06-25.yang" module ietf-rib-extension { yang-version "1.1"; namespace "urn:ietf:params:xml:ns:yang:ietf-rib-extension"; Lindem & Qu Expires December 27, 2020 [Page 6] Internet-Draft YANG RIB June 2020 prefix rib-ext; import ietf-inet-types { prefix "inet"; } import ietf-interfaces { prefix "if"; } import ietf-routing { prefix "rt"; } import ietf-ipv4-unicast-routing { prefix "v4ur"; } import ietf-ipv6-unicast-routing { prefix "v6ur"; } organization "IETF RTGWG - Routing Working Group"; contact "WG Web: WG List: Author: Acee Lindem Author: Yingzhen Qu "; description "This YANG module extends the generic data model for RIB by augmenting the ietf-netmod-routing-cfg model. It is intended that the module will be extended by vendors to define vendor-specific RIB parameters. This YANG model conforms to the Network Management Datastore Architecture (NDMA) as described in RFC 8242. Copyright (c) 2018 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 Lindem & Qu Expires December 27, 2020 [Page 7] Internet-Draft YANG RIB June 2020 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."; revision 2020-06-25 { description "Initial RFC Version"; reference "RFC XXXX: A YANG Data Model for RIB Extensions."; } /* Groupings */ grouping rib-statistics { description "Statistics grouping used for RIB augmentation"; container rib-summary-statistics { config false; description "Container for RIB statistics"; leaf total-routes { type uint32; description "Total routes in the RIB from all protocols"; } leaf total-active-routes { type uint32; description "Total active routes in the RIB"; } leaf total-route-memory { type uint64; description "Total memory for all routes in the RIB from all protocol clients"; } list protocol-rib-statistics { description "List protocol statistics"; leaf rib-protocol { type identityref { base rt:routing-protocol; } description "Routing protocol for statistics"; } leaf protocol-total-routes { type uint32; description Lindem & Qu Expires December 27, 2020 [Page 8] Internet-Draft YANG RIB June 2020 "Total number routes for protocol in the RIB"; } leaf protocol-active-routes { type uint32; description "Number active routes for protocol in the RIB"; } leaf protocol-route-memory { type uint64; description "Total memory for all routes in the RIB for protocol"; } } } } grouping next-hop { description "Next-hop grouping"; leaf interface { type if:interface-ref; description "Outgoing interface"; } leaf address { type inet:ip-address; description "IPv4 or IPv6 Address of the next-hop"; } } grouping attributes { description "Common attributes applicable to all paths"; leaf metric { type uint32; description "The metric is a numeric value that indicating the cost of the route from the perspective of the routing protocol installing the route. In general, routes with a lower metric installed by the same routing protocol are lower cost to reach and are preferable to routes with a higher metric. However, metrics from different routing protocols are not directly comparable."; } leaf tag { type uint32; description Lindem & Qu Expires December 27, 2020 [Page 9] Internet-Draft YANG RIB June 2020 "The tag is a 32-bit opaque value associate with the route that can be used for policy decisions such as advertisement and filtering of the route."; } leaf application-tag { type uint32; description "The application-specific tag is an additional tag that can be used applications that require semantics and/or policy different from that of the tag. For example, the tag is usually automatically advertised in OSPF AS-External Link State Advertisements (LSAs) while this application-specific tag is not advertised implicitly."; } } grouping repair-path { container repair-path { description "IP Fast Reroute next-hop repair path"; leaf outgoing-interface { type if:interface-state-ref; description "Name of the outgoing interface."; } leaf next-hop-address { type inet:ip-address; description "IP address of the next hop."; } leaf metric { type uint32; description "The metric for the repair path. While the IP Fast Reroute re-route repair is local and the metric is not advertised externally, the metric for repair path is useful for troubleshooting purposes."; } reference "RFC 5714: IP Fast Reroute Framework."; } } augment "/rt:routing/rt:control-plane-protocols/" + "rt:control-plane-protocol/rt:static-routes/v4ur:ipv4/" + "v4ur:route/v4ur:next-hop/v4ur:next-hop-options/" + "v4ur:simple-next-hop" { description Lindem & Qu Expires December 27, 2020 [Page 10] Internet-Draft YANG RIB June 2020 "Augment 'simple-next-hop' case in IPv4 unicast route."; leaf preference { type uint32; default "1"; description "The preference is used to select among multiple static routes, Routes with a lower preference next-hop are preferred and equal preference routes result in Equal-Cost-Mult-Path (ECMP) static routes."; } leaf tag { type uint32; default "0"; description "The tag is a 32-bit opaque value associate with the route that can be used for policy decisions such as advertisement and filtering of the route."; } } augment "/rt:routing/rt:control-plane-protocols/" + "rt:control-plane-protocol/rt:static-routes/v4ur:ipv4/" + "v4ur:route/v4ur:next-hop/v4ur:next-hop-options/" + "v4ur:next-hop-list/v4ur:next-hop-list/v4ur:next-hop" { description "Augment static route configuration 'next-hop-list'."; leaf preference { type uint32; default "1"; description "The preference is used to select among multiple static routes, Routes with a lower preference next-hop are preferred and equal preference routes result in Equal-Cost-Mult-Path (ECMP) static routes."; } leaf tag { type uint32; default "0"; description "The tag is a 32-bit opaque value associate with the route that can be used for policy decisions such as advertisement and filtering of the route."; } } augment "/rt:routing/rt:control-plane-protocols/" Lindem & Qu Expires December 27, 2020 [Page 11] Internet-Draft YANG RIB June 2020 + "rt:control-plane-protocol/rt:static-routes/v6ur:ipv6/" + "v6ur:route/v6ur:next-hop/v6ur:next-hop-options/" + "v6ur:simple-next-hop" { description "Augment 'simple-next-hop' case in IPv6 unicast route."; leaf preference { type uint32; default "1"; description "The preference is used to select among multiple static routes, Routes with a lower preference next-hop are preferred and equal preference routes result in Equal-Cost-Mult-Path (ECMP) static routes."; } leaf tag { type uint32; default "0"; description "The tag is a 32-bit opaque value associate with the route that can be used for policy decisions such as advertisement and filtering of the route."; } } augment "/rt:routing/rt:control-plane-protocols/" + "rt:control-plane-protocol/rt:static-routes/v6ur:ipv6/" + "v6ur:route/v6ur:next-hop/v6ur:next-hop-options/" + "v6ur:next-hop-list/v6ur:next-hop-list/v6ur:next-hop" { description "Augment static route configuration 'next-hop-list'."; leaf preference { type uint32; default "1"; description "The preference is used to select among multiple static routes, Routes with a lower preference next-hop are preferred and equal preference routes result in Equal-Cost-Mult-Path (ECMP) static routes."; } leaf tag { type uint32; default "0"; description "The tag is a 32-bit opaque value associate with the route that can be used for policy decisions such as Lindem & Qu Expires December 27, 2020 [Page 12] Internet-Draft YANG RIB June 2020 advertisement and filtering of the route."; } } augment "/rt:routing/rt:ribs/rt:rib" { description "Augment a RIB with statistics"; uses rib-statistics; } augment "/rt:routing/rt:ribs/rt:rib/" + "rt:routes/rt:route" { description "Augment a route in RIB with tag."; uses attributes; } augment "/rt:routing/rt:ribs/rt:rib/" + "rt:routes/rt:route/rt:next-hop/rt:next-hop-options/" + "rt:simple-next-hop" { description "Add more parameters to a path."; uses repair-path; } augment "/rt:routing/rt:ribs/rt:rib/" + "rt:routes/rt:route/rt:next-hop/rt:next-hop-options/" + "rt:special-next-hop" { description "Add more parameters to a path."; uses repair-path; } augment "/rt:routing/rt:ribs/rt:rib/" + "rt:routes/rt:route/rt:next-hop/rt:next-hop-options/" + "rt:next-hop-list/rt:next-hop-list/rt:next-hop" { description "This case augments the 'next-hop-options' in the routing model."; uses repair-path; } } Lindem & Qu Expires December 27, 2020 [Page 13] Internet-Draft YANG RIB June 2020 6. Security Considerations The YANG modules specified in this document define a schema for data that is designed to be accessed via network management protocols such as NETCONF [RFC6241] or RESTCONF [RFC8040]. The lowest NETCONF layer is the secure transport layer, and the mandatory-to-implement secure transport is Secure Shell (SSH) [RFC6242]. The lowest RESTCONF layer is HTTPS, and the mandatory-to-implement secure transport is TLS [RFC5246]. The NETCONF access control model [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 ietf-rib-extensions.yang 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. For these augmentations to ietf-routing.yang, the ability to delete, add, and modify IPv4 and IPv6 static routes would allow traffic to be misrouted. Some of the readable data nodes in the ietf-rib-extensions.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. The exposure of the Routing Information Base (RIB) will expose the routing 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. All the security considerations for [RFC8349] writable and readable data nodes apply to the augmentations described herein. 7. IANA Considerations This document registers a URI in the IETF XML registry [XML-REGISTRY]. Following the format in [RFC3688], the following registration is requested to be made: URI: urn:ietf:params:xml:ns:yang:ietf-rib-extension Registrant Contact: The IESG. XML: N/A, the requested URI is an XML namespace. Lindem & Qu Expires December 27, 2020 [Page 14] Internet-Draft YANG RIB June 2020 This document registers a YANG module in the YANG Module Names registry [RFC6020]. name: ietf-acl namespace: urn:ietf:params:xml:ns:yang:ietf-rib- extension prefix: ietf-rib-ext reference: RFC XXXX 8. References 8.1. Normative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . [RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, DOI 10.17487/RFC3688, January 2004, . [RFC5246] Dierks, T. and E. Rescorla, "The Transport Layer Security (TLS) Protocol Version 1.2", RFC 5246, DOI 10.17487/RFC5246, August 2008, . [RFC5714] Shand, M. and S. Bryant, "IP Fast Reroute Framework", RFC 5714, DOI 10.17487/RFC5714, January 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, . Lindem & Qu Expires December 27, 2020 [Page 15] Internet-Draft YANG RIB June 2020 [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, . [RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, May 2017, . [RFC8341] Bierman, A. and M. Bjorklund, "Network Configuration Access Control Model", STD 91, RFC 8341, DOI 10.17487/RFC8341, 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, . [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, . 8.2. Informative References [RFC8340] Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams", BCP 215, RFC 8340, DOI 10.17487/RFC8340, March 2018, . [XML-REGISTRY] Mealling, M., "The IETF XML Registry", BCP 81, January 2004. Appendix A. Combined Tree Diagram This appendix includes the combined ietf-routing.yang and ietf-rib- extensions.yang tree diagram. module: ietf-routing +--rw routing Lindem & Qu Expires December 27, 2020 [Page 16] Internet-Draft YANG RIB June 2020 | +--rw router-id? yang:dotted-quad | +--ro interfaces | | +--ro interface* if:interface-ref | +--rw control-plane-protocols | | +--rw control-plane-protocol* [type name] | | +--rw type identityref | | +--rw name string | | +--rw description? string | | +--rw static-routes | +--rw ribs | +--rw rib* [name] | +--rw name string | +--rw address-family identityref | +--ro default-rib? boolean {multiple-ribs}? | +--ro routes | | +--ro route* [] | | +--ro route-preference? route-preference | | +--ro next-hop | | | +--ro (next-hop-options) | | | +--:(simple-next-hop) | | | | +--ro outgoing-interface? if:interface-ref | | | +--:(special-next-hop) | | | | +--ro special-next-hop? enumeration | | | +--:(next-hop-list) | | | +--ro next-hop-list | | | +--ro next-hop* [] | | | +--ro outgoing-interface? | | | if:interface-ref | | +--ro source-protocol identityref | | +--ro active? empty | | +--ro last-updated? yang:date-and-time | +---x active-route | | +--ro output | | +--ro route | | +--ro next-hop | | | +--ro (next-hop-options) | | | +--:(simple-next-hop) | | | | +--ro outgoing-interface? | | | | if:interface-ref | | | +--:(special-next-hop) | | | | +--ro special-next-hop? enumeration | | | +--:(next-hop-list) | | | +--ro next-hop-list | | | +--ro next-hop* [] | | | +--ro outgoing-interface? | | | if:interface-ref | | +--ro source-protocol identityref | | +--ro active? empty Lindem & Qu Expires December 27, 2020 [Page 17] Internet-Draft YANG RIB June 2020 | | +--ro last-updated? yang:date-and-time | +--rw description? string o--ro routing-state +--ro router-id? yang:dotted-quad o--ro interfaces | o--ro interface* if:interface-state-ref o--ro control-plane-protocols | o--ro control-plane-protocol* [type name] | o--ro type identityref | o--ro name string o--ro ribs o--ro rib* [name] o--ro name string +--ro address-family identityref o--ro default-rib? boolean {multiple-ribs}? o--ro routes | o--ro route* [] | o--ro route-preference? route-preference | o--ro next-hop | | +--ro (next-hop-options) | | +--:(simple-next-hop) | | | +--ro outgoing-interface? if:interface-ref | | +--:(special-next-hop) | | | +--ro special-next-hop? enumeration | | +--:(next-hop-list) | | +--ro next-hop-list | | +--ro next-hop* [] | | +--ro outgoing-interface? | | if:interface-ref | +--ro source-protocol identityref | +--ro active? empty | +--ro last-updated? yang:date-and-time o---x active-route +--ro output o--ro route o--ro next-hop | +--ro (next-hop-options) | +--:(simple-next-hop) | | +--ro outgoing-interface? | | if:interface-ref | +--:(special-next-hop) | | +--ro special-next-hop? enumeration | +--:(next-hop-list) | +--ro next-hop-list | +--ro next-hop* [] | +--ro outgoing-interface? | if:interface-ref +--ro source-protocol identityref Lindem & Qu Expires December 27, 2020 [Page 18] Internet-Draft YANG RIB June 2020 +--ro active? empty +--ro last-updated? yang:date-and-time module: ietf-rib-extension augment /rt:routing/rt:control-plane-protocols /rt:control-plane-protocol/rt:static-routes/v4ur:ipv4 /v4ur:route/v4ur:next-hop/v4ur:next-hop-options /v4ur:simple-next-hop: +--rw preference? uint32 +--rw tag? uint32 +--rw application-tag? uint32 augment /rt:routing/rt:control-plane-protocols /rt:control-plane-protocol/rt:static-routes/v4ur:ipv4 /v4ur:route/v4ur:next-hop/v4ur:next-hop-options /v4ur:next-hop-list/v4ur:next-hop-list/v4ur:next-hop: +--rw preference? uint32 +--rw tag? uint32 +--rw application-tag? uint32 augment /rt:routing/rt:control-plane-protocols /rt:control-plane-protocol/rt:static-routes/v6ur:ipv6 /v6ur:route/v6ur:next-hop/v6ur:next-hop-options /v6ur:simple-next-hop: +--rw preference? uint32 +--rw tag? uint32 +--rw application-tag? uint32 augment /rt:routing/rt:control-plane-protocols /rt:control-plane-protocol/rt:static-routes/v6ur:ipv6 /v6ur:route/v6ur:next-hop/v6ur:next-hop-options /v6ur:next-hop-list/v6ur:next-hop-list/v6ur:next-hop: +--rw preference? uint32 +--rw tag? uint32 +--rw application-tag? uint32 augment /rt:routing/rt:ribs/rt:rib: +--ro rib-summary-statistics +--ro total-routes? uint32 +--ro total-active-routes? uint32 +--ro total-route-memory? uint64 +--ro protocol-rib-statistics* [] +--ro rib-protocol? identityref +--ro protocol-total-routes? uint32 +--ro protocol-active-routes? uint32 +--ro protocol-route-memory? uint64 augment /rt:routing/rt:ribs/rt:rib/rt:routes/rt:route: +--ro metric? uint32 +--ro tag? uint32 +--ro application-tag? uint32 augment /rt:routing/rt:ribs/rt:rib/rt:routes: +--ro repair-route* [id] Lindem & Qu Expires December 27, 2020 [Page 19] Internet-Draft YANG RIB June 2020 +--ro id string +--ro next-hop | +--ro outgoing-interface? if:interface-state-ref | +--ro next-hop-address? inet:ip-address +--ro metric? uint32 augment /rt:routing/rt:ribs/rt:rib/rt:routes/rt:route/rt:next-hop /rt:next-hop-options/rt:simple-next-hop: +--ro repair-path? -> /rt:routing/ribs/rib/routes/repair-route/id augment /rt:routing/rt:ribs/rt:rib/rt:routes/rt:route/rt:next-hop /rt:next-hop-options/rt:special-next-hop: +--ro repair-path? -> /rt:routing/ribs/rib/routes/repair-route/id augment /rt:routing/rt:ribs/rt:rib/rt:routes/rt:route/rt:next-hop /rt:next-hop-options/rt:next-hop-list/rt:next-hop-list /rt:next-hop: +--ro repair-path? -> /rt:routing/ribs/rib/routes/repair-route/id Appendix B. ietf-rib-extension.yang example The following is an XML example using the RIB extension module and RFC 8349. static static-routing-protocol 0.0.0.0/0 192.0.2.2 30 99 Lindem & Qu Expires December 27, 2020 [Page 20] Internet-Draft YANG RIB June 2020 ipv4-master v4ur:ipv4-unicast true 1 10.0.0.1 200 0.0.0.0/0 192.0.2.2 5 static 2015-10-24T18:02:45+02:00 192.1.1.0/24 192.0.2.2 1 110 ospf:ospf 2015-10-24T18:02:45+02:00 Lindem & Qu Expires December 27, 2020 [Page 21] Internet-Draft YANG RIB June 2020 Appendix C. Acknowledgments The RFC text was produced using Marshall Rose's xml2rfc tool. The authors wish to thank Les Ginsberg, Krishna Deevi, and Suyoung Yoon for their helpful comments and suggestions. The authors wish to thank Tom Petch and Rob Wilton for review and comments. Authors' Addresses Acee Lindem Cisco Systems 301 Midenhall Way Cary, NC 27513 USA EMail: acee@cisco.com Yingzhen Qu Futurewei 2330 Central Expressway Santa Clara, CA 95050 USA EMail: yingzhen.qu@futurewei.com Lindem & Qu Expires December 27, 2020 [Page 22]