Interdomain Routing K. Patel Internet-Draft Arrcus Intended status: Standards Track M. Jethanandani Expires: November 11, 2018 S. Hares Huawei May 10, 2018 BGP Model for Service Provider Networks draft-ietf-idr-bgp-model-03 Abstract This document defines a YANG data model for configuring and managing BGP, including protocol, policy, and operational aspects based on data center, carrier and content provider operational requirements. 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 November 11, 2018. Copyright Notice Copyright (c) 2018 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 Patel, et al. Expires November 11, 2018 [Page 1] Internet-Draft BGP Model May 2018 the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1. Goals and approach . . . . . . . . . . . . . . . . . . . 2 2. Model overview . . . . . . . . . . . . . . . . . . . . . . . 4 2.1. BGP protocol configuration . . . . . . . . . . . . . . . 4 2.2. Policy configuration overview . . . . . . . . . . . . . . 6 3. Relation to other YANG data models . . . . . . . . . . . . . 7 4. Security Considerations . . . . . . . . . . . . . . . . . . . 7 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 8 5.1. URI Registration . . . . . . . . . . . . . . . . . . . . 8 5.2. YANG Module Name Registration . . . . . . . . . . . . . . 8 6. YANG modules . . . . . . . . . . . . . . . . . . . . . . . . 9 7. BGP main module and submodule for base items . . . . . . . . 10 8. BGP types . . . . . . . . . . . . . . . . . . . . . . . . . . 49 9. BGP policy data . . . . . . . . . . . . . . . . . . . . . . . 58 10. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 72 11. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 72 12. References . . . . . . . . . . . . . . . . . . . . . . . . . 72 12.1. Normative references . . . . . . . . . . . . . . . . . . 72 12.2. Informative references . . . . . . . . . . . . . . . . . 74 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 74 1. Introduction This document describes a YANG [RFC7950] data model for the BGP [RFC4271] protocol, including various protocol extensions, policy configuration, as well as defining key operational state data. The model is intended to be vendor-neutral, in order to allow operators to manage BGP configuration in heterogeneous environments with routers supplied by multiple vendors. The model is also intended to be readily mapped to existing implementations to facilitate support from as large a set of routing hardware and software vendors as possible. 1.1. Goals and approach The model covers the base BGP features that are deployed across major implementations and the common BGP configurations in use across a number of operator network deployments. In particular, this model attempts to cover BGP features defined in BGP [RFC4271], BGP Communities Attribute [RFC1997], BGP Route Reflection [RFC4456], Multiprotocol Extensions for BGP-4 [RFC4760], Autonomous System Confederations for BGP [RFC5065], BGP Route Flap Damping [RFC2439], Patel, et al. Expires November 11, 2018 [Page 2] Internet-Draft BGP Model May 2018 Graceful Restart Mechanism for BGP [RFC4724], and BGP Prefix Origin Validation [RFC6811]. Along with configuration of base BGP features, this model also addresses policy configuration, by providing "hooks" for applying policies, and also defining BGP-specific policy features. The BGP policy features are intended to be used with the general routing policy model defined in A YANG Data Model for Routing Policy Management [I-D.ietf-rtgwg-policy-model]. The model supports the NMDA [RFC8342] architecture. For the base BGP features, the focus of the model described in this document is on providing configuration and operational state information relating to: o The global BGP instance, and neighbors whose configuration is specified individually, or templated with the use of peer-groups. o The address families that are supported by peers, and the global configuration which relates to them. o The policy configuration "hooks" and BGP-specific policy features that relate to a neighbor - controlling the import and export of NLRIs. As mentioned earlier, any configuration items that are deemed to be widely available in existing major BGP implementations are included in the model. Additional, more esoteric, configuration items that are not commonly used, or only available from a single implementation, are omitted from the model with an expectation that they will be available in companion modules that augment or extend the current model. This allows clarity in identifying data that is part of the vendor-neutral base model. Where possible, naming in the model follows conventions used in available standards documents, and otherwise tries to be self- explanatory with sufficient descriptions of the intended behavior. Similarly, configuration data value constraints and default values, where used, are based on recommendations in current standards documentation, or those commonly used in multiple implementations. Since implementations can vary widely in this respect, this version of the model specifies only a limited set of defaults and ranges with the expectation of being more prescriptive in future versions based on actual operator use. Patel, et al. Expires November 11, 2018 [Page 3] Internet-Draft BGP Model May 2018 2. Model overview The BGP model is defined across several YANG modules and submodules, but at a high level is organized into six elements: o base protocol configuration -- configuration affecting BGP protocol-related operations, defined at various levels of hierarchy. o multiprotocol configuration -- configuration affecting individual address-families within BGP Multiprotocl Extensions for BGP-4 [RFC4760]. o neighbor configuration -- configuration affecting an individual neighbor within BGP. o neighbor multiprotocol configuration -- configuration affecting individual address-families for a neighbor within BGP. o policy configuration -- hooks for application of the policies defined in A YANG Data Model for Routing Policy Management [I-D.ietf-rtgwg-policy-model] that act on routes sent (received) to (from) peers or other routing protocols and BGP-specific policy features. o operational state -- variables used for monitoring and management of BGP operations. These modules also make use of standard Internet types, such as IP addresses and prefixes, autonomous system numbers, etc., defined in Common YANG Data Types [RFC6991]. 2.1. BGP protocol configuration The BGP protocol configuration model is organized hierarchically, much like the majority of router implementations. That is, configuration items can be specified at multiple levels, as shown below. +--rw bgp! +--rw global | +-- (global-configuration-options) +--rw neighbors | +--rw neighbor* [neighbor-address] | +-- (neighbor-configuration-options) +--rw peer-groups +--rw peer-group* [peer-group-name] +-- (neighbor-configuration-options) Patel, et al. Expires November 11, 2018 [Page 4] Internet-Draft BGP Model May 2018 Users may specify configuration at a higher level and have it apply to all lower-level items, or provide overriding configuration at a lower level of the hierarchy. Overriding configuration items are optional, with neighbor specific configuration being the most specific or lowest level, followed by peer-group, and finally global. Global configuration options reflect a subset of the peer-group or neighbor specific configuration options which are relevant to the entire BGP instance. The model makes the simplifying assumption that most of the configuration items are available at all levels of the hierarchy. That is, very little configuration is specific to a particular level in the hierarchy, other than obvious items such as "group-name" only being available for the peer group-level config. A notable exception is for sub-address family configuration where some items are only applicable for a given AFI-SAFI combination. In order to allow common configuration to be applied to a set of neighbors, all neighbor configuration options are available within a peer-group. A neighbor is associated to a particular peer-group through the use of a peer-group leaf (which provides a reference to a configured item in the peer-group list). Address-family configuration is made available in multiple points within the model - primarily within the global container, where instance-wide configuration can be set (for example, global protocol parameters, the BGP best path route selection options, or global policies relating to the address-family); and on a per-neighbor or per-peer-group basis, where address-families can be enabled or disabled, and policy associated with the parent entity applied. Within the afi-safi container, generic configuration that applies to all address-families (e.g., whether the AFI-SAFI is enabled) is presented at the top-level, with address-family specific containers made available for options relating to only that AFI-SAFI. Within the current revision of the model a generic set of address-families, and common configuration and state options are included - further work is expected to add additional parameters to this area of the model. The following address-families are currently supported by the model: Patel, et al. Expires November 11, 2018 [Page 5] Internet-Draft BGP Model May 2018 +--rw bgp! +--rw global +--rw afi-safis +--rw afi-safi* [afi-safi-name] +--rw afi-safi-name -> ../config/afi-safi-name | +--rw ipv4-unicast | ... +--rw ipv6-unicast | ... +--rw ipv4-labelled-unicast | ... +--rw ipv6-labelled-unicast | ... +--rw l3vpn-ipv4-unicast | ... +--rw l3vpn-ipv6-unicast | ... +--rw l3vpn-ipv4-multicast | ... +--rw l3vpn-ipv6-multicast | ... +--rw l2vpn-vpls | ... +--rw l2vpn-evpn | ... 2.2. Policy configuration overview The BGP policy configuration model references the generic YANG routing policy model described in A YANG Data Model for Routing Policy Management [I-D.ietf-rtgwg-policy-model], which represents a condition-action policy framework for routing. This model adds BGP- specific conditions (e.g., matching on the community attribute), and actions (e.g., setting local preference) to the generic policy framework. Policies that are defined in the routing-policy model are referenced in multiple places within the model: o within the global instance, where a policy applies to all address- families for all peers. o on a global AFI-SAFI basis, where policies apply to all peers for a particular address-family. Patel, et al. Expires November 11, 2018 [Page 6] Internet-Draft BGP Model May 2018 o on a per-peer-group or per-neighbor basis - where the policy applies to all address-families for the particular group or neighbor. o on a per-afi-safi basis within a neighbor or peer-group context, where the policy is specific to the AFI-SAFI for a a specific neighbor or group. +--rw bgp +--rw global | +--rw afi-safi | | +--rw afi-safi* [afi-safi-name] | | +--rw apply-policy | +--rw apply-policy +--rw neighbors | +--rw neighbor* [neighbor-address] | +--rw afi-safi | | +--rw afi-safi* [afi-safi-name] | | +--rw apply-policy | +--rw apply-policy +--rw peer-groups +--rw peer-group* [peer-group-name] +--rw afi-safi | +--rw afi-safi* [afi-safi-name] | +--rw apply-policy +--rw apply-policy 3. Relation to other YANG data models The BGP model is intended to work within a larger framework model, such as the Network Instance model YANG Model for Network Instance [I-D.ietf-rtgwg-ni-model] which provides a comprehensive model for defining VRFs, associated routing protocols, multiple protocol instances, and inter-protocol and inter-instance routing policies. The current version of the model imports and instantiates the BGP model in its tree at /network-instances/network-instance/vrf- root/rt:routing/control-plane-protocols/control-plane-protocol/ bgp/... It is also possible to integrate the BGP model with the Routing Management model A YANG Data Model for Routing Management [RFC8349] which defines the notion of routing instances, or VRFs. 4. Security Considerations The YANG module specified in this document defines 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 Patel, et al. Expires November 11, 2018 [Page 7] Internet-Draft BGP Model May 2018 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 (NACM) [RFC8341] provides the means to restrict access for particular NETCONF or RESTCONF users to a preconfigured subset of all available NETCONF or RESTCONF protocol operations and content. There are a number of data nodes defined in this 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. These are the subtrees and data nodes and their sensitivity/vulnerability: Some of the readable data nodes in this 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: Some of the RPC operations in this YANG module may be considered sensitive or vulnerable in some network environments. It is thus important to control access to these operations. These are the operations and their sensitivity/vulnerability: 5. IANA Considerations This document registers three URIs and three YANG modules. 5.1. URI Registration in the IETF XML registry [RFC3688] [RFC3688]. Following the format in RFC 3688, the following registration is requested to be made: URI: urn:ietf:params:xml:ns:yang:ietf-bgp URI: urn:ietf:params:xml:ns:yang:ietf-bgp-policy URI: urn:ietf:params:xml:ns:yang:ietf-bgp-types Registrant Contact: The IESG. XML: N/A, the requested URI is an XML namespace. 5.2. YANG Module Name Registration This document registers three YANG module in the YANG Module Names registry YANG [RFC6020]. Patel, et al. Expires November 11, 2018 [Page 8] Internet-Draft BGP Model May 2018 name: ietf-bgp namespace: urn:ietf:params:xml:ns:yang:ietf-bgp prefix: bgp reference: RFC XXXX name: ietf-bgp-policy namespace: urn:ietf:params:xml:ns:yang:ietf-bgp-policy prefix: bgp-pol reference: RFC XXXX name: ietf-bgp-types namespace: urn:ietf:params:xml:ns:yang:ietf-bgp-types prefix: bgp-types reference: RFC XXXX 6. YANG modules The modules comprising the BGP configuration and operational model are described by the YANG modules and submodules in the sections below. The main module, ietf-bgp.yang, includes the following submodules: o ietf-bgp-common - defines the groupings that are common across more than one context (where contexts are neighbor, group, global) o ietf-bgp-common-multiprotocol - defines the groupings that are common across more than one context, and relate to multiprotocol BGP o ietf-bgp-common-structure - defines groupings that are shared by multiple contexts, but are used only to create structural elements, i.e., containers (leaf nodes are defined in separate groupings) o ietf-bgp-global - groupings with data specific to the global context o ietf-bgp-peer-group - groupings with data specific to the peer group context o ietf-bgp-neighbor - groupings with data specific to the neighbor context Additional modules include: o ietf-bgp-types - common type and identity definitions for BGP, including BGP policy Patel, et al. Expires November 11, 2018 [Page 9] Internet-Draft BGP Model May 2018 o ietf-bgp-policy - BGP-specific policy data definitions for use with [I-D.ietf-rtgwg-policy-model] (described in more detail Section 2.2) 7. BGP main module and submodule for base items file "ietf-bgp@2018-05-09.yang" module ietf-bgp { yang-version "1.1"; namespace "urn:ietf:params:xml:ns:yang:ietf-bgp"; prefix "bgp"; import ietf-routing-policy { prefix rpol; reference "RFC ZZZZ: A YANG Data Model for Routing Policy Management"; } include ietf-bgp-common; include ietf-bgp-common-multiprotocol; include ietf-bgp-common-structure; include ietf-bgp-neighbor; include ietf-bgp-global; include ietf-bgp-peer-group; organization "IETF IDR Working Group"; contact "WG Web: WG List: Authors: Keyur Patel (keyur at arrcus.com), Mahesh Jethanandani (mjethanandani at gmail.com), Susan Hares (shares at ndzh.com"; description "This module describes a YANG model for BGP protocol configuration. It is a limited subset of all of the configuration parameters available in the variety of vendor implementations, hence it is expected that it would be augmented with vendor- specific configuration data as needed. Additional modules or submodules to handle other aspects of BGP configuration, including policy, VRFs, VPNs, and additional address families are also expected. This model supports the following BGP configuration level hierarchy: Patel, et al. Expires November 11, 2018 [Page 10] Internet-Draft BGP Model May 2018 BGP | +-> [ global BGP configuration ] +-> AFI / SAFI global +-> peer group +-> [ peer group config ] +-> AFI / SAFI [ per-AFI overrides ] +-> neighbor +-> [ neighbor config ] +-> [ optional pointer to peer-group ] +-> AFI / SAFI [ per-AFI overrides ]"; revision "2018-05-09" { description "Initial Version"; reference "RFC XXXX, BGP Model for Service Provider Network "; } /* * Groupings */ container bgp { description "Top-level configuration for the BGP router"; container global { presence "Enables global configuration of BGP"; description "Global configuration for the BGP router"; uses bgp-global-base; uses rpol:apply-policy-group; } container neighbors { description "Configuration for BGP neighbors"; uses bgp-neighbor-list; } container peer-groups { description "Configuration for BGP peer-groups"; uses bgp-peer-group-list; } } } Patel, et al. Expires November 11, 2018 [Page 11] Internet-Draft BGP Model May 2018 file "ietf-bgp-common@2018-05-09.yang" submodule ietf-bgp-common { yang-version "1.1"; belongs-to ietf-bgp { prefix "bgp"; } import ietf-bgp-types { prefix bgp-types; } import ietf-inet-types { prefix inet; } organization "IETF IDR Working Group"; contact "WG Web: WG List: Authors: Keyur Patel, Mahesh Jethanandani, Susan Hares"; description "This sub-module contains common groupings that are common across multiple contexts within the BGP module. That is to say that they may be application to a subset of global, peer-group or neighbor contexts."; revision "2018-05-09" { description "Initial Version"; reference "RFC XXX, BGP Model for Service Provider Network."; } grouping bgp-common-neighbor-group-timers-config { description "Config parameters related to timers associated with the BGP peer"; leaf connect-retry { type decimal64 { fraction-digits 2; } default 30; Patel, et al. Expires November 11, 2018 [Page 12] Internet-Draft BGP Model May 2018 description "Time interval in seconds between attempts to establish a session with the peer."; } leaf hold-time { type decimal64 { fraction-digits 2; } default 90; description "Time interval in seconds that a BGP session will be considered active in the absence of keepalive or other messages from the peer. The hold-time is typically set to 3x the keepalive-interval."; reference "RFC 4271 - A Border Gateway Protocol 4, Sec. 10"; } leaf keepalive-interval { type decimal64 { fraction-digits 2; } default 30; description "Time interval in seconds between transmission of keepalive messages to the neighbor. Typically set to 1/3 the hold-time."; } leaf minimum-advertisement-interval { type decimal64 { fraction-digits 2; } default 30; description "Minimum time which must elapse between subsequent UPDATE messages relating to a common set of NLRI being transmitted to a peer. This timer is referred to as MinRouteAdvertisementIntervalTimer by RFC 4721 and serves to reduce the number of UPDATE messages transmitted when a particular set of NLRI exhibit instability."; reference "RFC 4271 - A Border Gateway Protocol 4, Sec 9.2.1.1"; } } grouping bgp-common-neighbor-group-config { Patel, et al. Expires November 11, 2018 [Page 13] Internet-Draft BGP Model May 2018 description "Neighbor level configuration items."; leaf peer-as { type inet:as-number; description "AS number of the peer."; } leaf local-as { type inet:as-number; description "The local autonomous system number that is to be used when establishing sessions with the remote peer or peer group, if this differs from the global BGP router autonomous system number."; } leaf peer-type { type bgp-types:peer-type; description "Explicitly designate the peer or peer group as internal (iBGP) or external (eBGP)."; } leaf auth-password { type string; description "Configures an MD5 authentication password for use with neighboring devices."; } leaf remove-private-as { // could also make this a container with a flag to enable // remove-private and separate option. here, option implies // remove-private is enabled. type bgp-types:remove-private-as-option; description "Remove private AS numbers from updates sent to peers - when this leaf is not specified, the AS_PATH attribute should be sent to the peer unchanged"; } leaf route-flap-damping { type boolean; default false; description "Enable route flap damping."; Patel, et al. Expires November 11, 2018 [Page 14] Internet-Draft BGP Model May 2018 } leaf send-community { type bgp-types:community-type; default "NONE"; description "Specify which types of community should be sent to the neighbor or group. The default is to not send the community attribute"; } leaf description { type string; description "An optional textual description (intended primarily for use with a peer or group"; } } grouping bgp-common-neighbor-group-transport-config { description "Configuration parameters relating to the transport protocol used by the BGP session to the peer"; leaf tcp-mss { type uint16; description "Sets the max segment size for BGP TCP sessions."; } leaf mtu-discovery { type boolean; default false; description "Turns path mtu discovery for BGP TCP sessions on (true) or off (false)"; } leaf passive-mode { type boolean; default false; description "Wait for peers to issue requests to open a BGP session, rather than initiating sessions from the local router."; } leaf local-address { type union { Patel, et al. Expires November 11, 2018 [Page 15] Internet-Draft BGP Model May 2018 type inet:ip-address; type string; } //TODO: the string should be converted to a leafref type //to point to an interface when YANG 1.1 is available with //leafrefs in union types. description "Set the local IP (either IPv4 or IPv6) address to use for the session when sending BGP update messages. This may be expressed as either an IP address or reference to the name of an interface."; } } grouping bgp-common-neighbor-group-error-handling-config { description "Configuration parameters relating to enhanced error handling behaviours for BGP"; leaf treat-as-withdraw { type boolean; default "false"; description "Specify whether erroneous UPDATE messages for which the NLRI can be extracted are reated as though the NLRI is withdrawn - avoiding session reset"; reference "draft-ietf-idr-error-handling-16"; } } grouping bgp-common-graceful-restart-config { description "Configuration parameters relating to BGP graceful restart."; leaf enabled { type boolean; description "Enable or disable the graceful-restart capability."; } leaf restart-time { type uint16 { range 0..4096; } description "Estimated time (in seconds) for the local BGP speaker to restart a session. This value is advertise in the graceful restart BGP capability. This is a 12-bit value, referred to Patel, et al. Expires November 11, 2018 [Page 16] Internet-Draft BGP Model May 2018 as Restart Time in RFC4724. Per RFC4724, the suggested default value is <= the hold-time value."; } leaf stale-routes-time { type decimal64 { fraction-digits 2; } description "An upper-bound on the time that stale routes will be retained by a router after a session is restarted. If an End-of-RIB (EOR) marker is received prior to this timer expiring stale-routes will be flushed upon its receipt - if no EOR is received, then when this timer expires stale paths will be purged. This timer is referred to as the Selection_Deferral_Timer in RFC4724"; } leaf helper-only { type boolean; description "Enable graceful-restart in helper mode only. When this leaf is set, the local system does not retain forwarding its own state during a restart, but supports procedures for the receiving speaker, as defined in RFC4724."; } } grouping bgp-common-use-multiple-paths-config { description "Generic configuration options relating to use of multiple paths for a referenced AFI-SAFI, group or neighbor"; leaf enabled { type boolean; default false; description "Whether the use of multiple paths for the same NLRI is enabled for the neighbor. This value is overridden by any more specific configuration value."; } } grouping bgp-common-use-multiple-paths-ebgp-as-options-config { description "Configuration parameters specific to eBGP multi-path applicable to all contexts"; Patel, et al. Expires November 11, 2018 [Page 17] Internet-Draft BGP Model May 2018 leaf allow-multiple-as { type boolean; default "false"; description "Allow multi-path to use paths from different neighboring ASes. The default is to only consider multiple paths from the same neighboring AS."; } } grouping bgp-common-global-group-use-multiple-paths { description "Common grouping used for both global and groups which provides configuration and state parameters relating to use of multiple paths"; container use-multiple-paths { description "Parameters related to the use of multiple paths for the same NLRI"; uses bgp-common-use-multiple-paths-config; container ebgp { description "Multi-Path parameters for eBGP"; leaf allow-multiple-as { type boolean; default "false"; description "Allow multi-path to use paths from different neighboring ASes. The default is to only consider multiple paths from the same neighboring AS."; } leaf maximum-paths { type uint32; default 1; description "Maximum number of parallel paths to consider when using BGP multi-path. The default is use a single path."; } } container ibgp { description "Multi-Path parameters for iBGP"; Patel, et al. Expires November 11, 2018 [Page 18] Internet-Draft BGP Model May 2018 leaf maximum-paths { type uint32; default 1; description "Maximum number of parallel paths to consider when using iBGP multi-path. The default is to use a single path"; } } } } grouping bgp-common-route-selection-options { description "Configuration and state relating to route selection options"; container route-selection-options { description "Parameters relating to options for route selection"; leaf always-compare-med { type boolean; default "false"; description "Compare multi-exit discriminator (MED) value from different ASes when selecting the best route. The default behavior is to only compare MEDs for paths received from the same AS."; } leaf ignore-as-path-length { type boolean; default "false"; description "Ignore the AS path length when selecting the best path. The default is to use the AS path length and prefer paths with shorter length."; } leaf external-compare-router-id { type boolean; default "true"; description "When comparing similar routes received from external BGP peers, use the router-id as a criterion to select the active path."; } leaf advertise-inactive-routes { Patel, et al. Expires November 11, 2018 [Page 19] Internet-Draft BGP Model May 2018 type boolean; default "false"; description "Advertise inactive routes to external peers. The default is to only advertise active routes."; } leaf enable-aigp { type boolean; default false; description "Flag to enable sending / receiving accumulated IGP attribute in routing updates"; } leaf ignore-next-hop-igp-metric { type boolean; default "false"; description "Ignore the IGP metric to the next-hop when calculating BGP best-path. The default is to select the route for which the metric to the next-hop is lowest"; } } } grouping bgp-common-state { description "Grouping containing common counters relating to prefixes and paths"; leaf total-paths { type uint32; config false; description "Total number of BGP paths within the context"; } leaf total-prefixes { type uint32; config false; description "Total number of BGP prefixes received within the context"; } } } Patel, et al. Expires November 11, 2018 [Page 20] Internet-Draft BGP Model May 2018 file "ietf-bgp-common-multiprotocol@2018-05-09.yang" submodule ietf-bgp-common-multiprotocol { yang-version "1.1"; belongs-to ietf-bgp { prefix "bgp"; } import ietf-bgp-types { prefix bgp-types; } import ietf-routing-policy { prefix rpol; } include ietf-bgp-common; // meta organization "IETF IDR Working Group"; contact "WG Web: WG List: Editor: Mahesh Jethanandani (mjethanandani@gmail.com) Authors: Keyur Patel, Mahesh Jethanandani, Susan Hares"; description "This sub-module contains groupings that are related to support for multiple protocols in BGP. The groupings are common across multiple contexts."; revision "2018-05-09" { description "Initial Version"; reference "RFC XXX, BGP Model for Service Provider Network."; } grouping bgp-common-mp-afi-safi-graceful-restart-config { description "BGP graceful restart parameters that apply on a per-AFI-SAFI basis"; leaf enabled { type boolean; Patel, et al. Expires November 11, 2018 [Page 21] Internet-Draft BGP Model May 2018 default false; description "This leaf indicates whether graceful-restart is enabled for this AFI-SAFI"; } } grouping bgp-common-mp-afi-safi-config { description "Configuration parameters used for all BGP AFI-SAFIs"; leaf afi-safi-name { type identityref { base bgp-types:AFI_SAFI_TYPE; } description "AFI,SAFI"; } leaf enabled { type boolean; default false; description "This leaf indicates whether the IPv4 Unicast AFI,SAFI is enabled for the neighbour or group"; } } grouping bgp-common-mp-all-afi-safi-list-contents { description "A common grouping used for contents of the list that is used for AFI-SAFI entries"; // import and export policy included for the afi/safi uses rpol:apply-policy-group; uses bgp-common-mp-ipv4-unicast-group; uses bgp-common-mp-ipv6-unicast-group; uses bgp-common-mp-ipv4-labeled-unicast-group; uses bgp-common-mp-ipv6-labeled-unicast-group; uses bgp-common-mp-l3vpn-ipv4-unicast-group; uses bgp-common-mp-l3vpn-ipv6-unicast-group; uses bgp-common-mp-l3vpn-ipv4-multicast-group; uses bgp-common-mp-l3vpn-ipv6-multicast-group; uses bgp-common-mp-l2vpn-vpls-group; uses bgp-common-mp-l2vpn-evpn-group; } // Groupings relating to each address family Patel, et al. Expires November 11, 2018 [Page 22] Internet-Draft BGP Model May 2018 grouping bgp-common-mp-ipv4-unicast-group { description "Group for IPv4 Unicast configuration options"; container ipv4-unicast { when "../afi-safi-name = 'bgp-types:IPV4_UNICAST'" { description "Include this container for IPv4 Unicast specific configuration"; } description "IPv4 unicast configuration options"; // include common IPv[46] unicast options uses bgp-common-mp-ipv4-ipv6-unicast-common; // placeholder for IPv4 unicast specific configuration } } grouping bgp-common-mp-ipv6-unicast-group { description "Group for IPv6 Unicast configuration options"; container ipv6-unicast { when "../afi-safi-name = 'bgp-types:IPV6_UNICAST'" { description "Include this container for IPv6 Unicast specific configuration"; } description "IPv6 unicast configuration options"; // include common IPv[46] unicast options uses bgp-common-mp-ipv4-ipv6-unicast-common; // placeholder for IPv6 unicast specific configuration // options } } grouping bgp-common-mp-ipv4-labeled-unicast-group { description "Group for IPv4 Labeled Unicast configuration options"; container ipv4-labeled-unicast { when "../afi-safi-name = 'bgp-types:IPV4_LABELED_UNICAST'" { description Patel, et al. Expires November 11, 2018 [Page 23] Internet-Draft BGP Model May 2018 "Include this container for IPv4 Labeled Unicast specific configuration"; } description "IPv4 Labeled Unicast configuration options"; uses bgp-common-mp-all-afi-safi-common; // placeholder for IPv4 Labeled Unicast specific config // options } } grouping bgp-common-mp-ipv6-labeled-unicast-group { description "Group for IPv6 Labeled Unicast configuration options"; container ipv6-labeled-unicast { when "../afi-safi-name = 'bgp-types:IPV6_LABELED_UNICAST'" { description "Include this container for IPv6 Labeled Unicast specific configuration"; } description "IPv6 Labeled Unicast configuration options"; uses bgp-common-mp-all-afi-safi-common; // placeholder for IPv6 Labeled Unicast specific config // options. } } grouping bgp-common-mp-l3vpn-ipv4-unicast-group { description "Group for IPv4 Unicast L3VPN configuration options"; container l3vpn-ipv4-unicast { when "../afi-safi-name = 'bgp-types:L3VPN_IPV4_UNICAST'" { description "Include this container for IPv4 Unicast L3VPN specific configuration"; } description "Unicast IPv4 L3VPN configuration options"; // include common L3VPN configuration options uses bgp-common-mp-l3vpn-ipv4-ipv6-unicast-common; Patel, et al. Expires November 11, 2018 [Page 24] Internet-Draft BGP Model May 2018 // placeholder for IPv4 Unicast L3VPN specific config options. } } grouping bgp-common-mp-l3vpn-ipv6-unicast-group { description "Group for IPv6 Unicast L3VPN configuration options"; container l3vpn-ipv6-unicast { when "../afi-safi-name = 'bgp-types:L3VPN_IPV6_UNICAST'" { description "Include this container for unicast IPv6 L3VPN specific configuration"; } description "Unicast IPv6 L3VPN configuration options"; // include common L3VPN configuration options uses bgp-common-mp-l3vpn-ipv4-ipv6-unicast-common; // placeholder for IPv6 Unicast L3VPN specific configuration // options } } grouping bgp-common-mp-l3vpn-ipv4-multicast-group { description "Group for IPv4 L3VPN multicast configuration options"; container l3vpn-ipv4-multicast { when "../afi-safi-name = 'bgp-types:L3VPN_IPV4_MULTICAST'" { description "Include this container for multicast IPv6 L3VPN specific configuration"; } description "Multicast IPv4 L3VPN configuration options"; // include common L3VPN multicast options uses bgp-common-mp-l3vpn-ipv4-ipv6-multicast-common; // placeholder for IPv4 Multicast L3VPN specific configuration // options } } grouping bgp-common-mp-l3vpn-ipv6-multicast-group { description Patel, et al. Expires November 11, 2018 [Page 25] Internet-Draft BGP Model May 2018 "Group for IPv6 L3VPN multicast configuration options"; container l3vpn-ipv6-multicast { when "../afi-safi-name = 'bgp-types:L3VPN_IPV6_MULTICAST'" { description "Include this container for multicast IPv6 L3VPN specific configuration"; } description "Multicast IPv6 L3VPN configuration options"; // include common L3VPN multicast options uses bgp-common-mp-l3vpn-ipv4-ipv6-multicast-common; // placeholder for IPv6 Multicast L3VPN specific configuration // options } } grouping bgp-common-mp-l2vpn-vpls-group { description "Group for BGP-signalled VPLS configuration options"; container l2vpn-vpls { when "../afi-safi-name = 'bgp-types:L2VPN_VPLS'" { description "Include this container for BGP-signalled VPLS specific configuration"; } description "BGP-signalled VPLS configuration options"; // include common L2VPN options uses bgp-common-mp-l2vpn-common; // placeholder for BGP-signalled VPLS specific configuration // options } } grouping bgp-common-mp-l2vpn-evpn-group { description "Group for BGP EVPN configuration options"; container l2vpn-evpn { when "../afi-safi-name = 'bgp-types:L2VPN_EVPN'" { description "Include this container for BGP EVPN specific configuration"; Patel, et al. Expires November 11, 2018 [Page 26] Internet-Draft BGP Model May 2018 } description "BGP EVPN configuration options"; // include common L2VPN options uses bgp-common-mp-l2vpn-common; // placeholder for BGP EVPN specific configuration options } } // Common groupings across multiple AFI,SAFIs grouping bgp-common-mp-all-afi-safi-common { description "Grouping for configuration common to all AFI,SAFI"; container prefix-limit { description "Parameters relating to the prefix limit for the AFI-SAFI"; leaf max-prefixes { type uint32; description "Maximum number of prefixes that will be accepted from the neighbour"; } leaf shutdown-threshold-pct { type bgp-types:percentage; description "Threshold on number of prefixes that can be received from a neighbour before generation of warning messages or log entries. Expressed as a percentage of max-prefixes"; } leaf restart-timer { type decimal64 { fraction-digits 2; } units "seconds"; description "Time interval in seconds after which the BGP session is re-established after being torn down due to exceeding the max-prefix limit."; } } } grouping bgp-common-mp-ipv4-ipv6-unicast-common { description Patel, et al. Expires November 11, 2018 [Page 27] Internet-Draft BGP Model May 2018 "Common configuration that is applicable for IPv4 and IPv6 unicast"; // include common afi-safi options. uses bgp-common-mp-all-afi-safi-common; // configuration options that are specific to IPv[46] unicast leaf send-default-route { type boolean; default "false"; description "If set to true, send the default-route to the neighbour(s)"; } } grouping bgp-common-mp-l3vpn-ipv4-ipv6-unicast-common { description "Common configuration applied across L3VPN for IPv4 and IPv6"; // placeholder -- specific configuration options that are generic // across IPv[46] unicast address families. uses bgp-common-mp-all-afi-safi-common; } grouping bgp-common-mp-l3vpn-ipv4-ipv6-multicast-common { description "Common configuration applied across L3VPN for IPv4 and IPv6"; // placeholder -- specific configuration options that are // generic across IPv[46] multicast address families. uses bgp-common-mp-all-afi-safi-common; } grouping bgp-common-mp-l2vpn-common { description "Common configuration applied across L2VPN address families"; // placeholder -- specific configuration options that are // generic across L2VPN address families uses bgp-common-mp-all-afi-safi-common; } // Config groupings for common groups grouping bgp-common-mp-all-afi-safi-common-prefix-limit-config { description Patel, et al. Expires November 11, 2018 [Page 28] Internet-Draft BGP Model May 2018 "Configuration parameters relating to prefix-limits for an AFI-SAFI"; } } file "ietf-bgp-common-structure@2018-05-09.yang" submodule ietf-bgp-common-structure { yang-version "1.1"; belongs-to ietf-bgp { prefix "bgp"; } import ietf-bgp-types { prefix bgp-types; } import ietf-routing-policy { prefix rpol; } include ietf-bgp-common-multiprotocol; include ietf-bgp-common; // meta organization "IETF IDR Working Group"; contact "WG Web: WG List: Editor: Mahesh Jethanandani (mjethanandani@gmail.com) Authors: Keyur Patel, Mahesh Jethanandani, Susan Hares"; description "This sub-module contains groupings that are common across multiple BGP contexts and provide structure around other primitive groupings."; revision "2018-05-09" { description "Initial Version"; reference "RFC XXX, BGP Model for Service Provider Network."; } grouping bgp-common-structure-neighbor-group-logging-options { description Patel, et al. Expires November 11, 2018 [Page 29] Internet-Draft BGP Model May 2018 "Structural grouping used to include error handling configuration and state for both BGP neighbors and groups"; container logging-options { description "Logging options for events related to the BGP neighbor or group"; leaf log-neighbor-state-changes { type boolean; default "true"; description "Configure logging of peer state changes. Default is to enable logging of peer state changes."; } } } grouping bgp-common-structure-neighbor-group-ebgp-multihop { description "Structural grouping used to include eBGP multi-hop configuration and state for both BGP neighbors and peer groups"; container ebgp-multihop { description "eBGP multi-hop parameters for the BGPgroup"; leaf enabled { type boolean; default "false"; description "When enabled the referenced group or neighbors are permitted to be indirectly connected - including cases where the TTL can be decremented between the BGP peers"; } leaf multihop-ttl { type uint8; description "Time-to-live value to use when packets are sent to the referenced group or neighbors and ebgp-multihop is enabled"; } } } grouping bgp-common-structure-neighbor-group-route-reflector { description Patel, et al. Expires November 11, 2018 [Page 30] Internet-Draft BGP Model May 2018 "Structural grouping used to include route reflector configuration and state for both BGP neighbors and peer groups"; container route-reflector { description "Route reflector parameters for the BGPgroup"; leaf route-reflector-cluster-id { type bgp-types:rr-cluster-id-type; description "route-reflector cluster id to use when local router is configured as a route reflector. Commonly set at the group level, but allows a different cluster id to be set for each neighbor."; } leaf route-reflector-client { type boolean; default "false"; description "Configure the neighbor as a route reflector client."; } } } grouping bgp-common-structure-neighbor-group-as-path-options { description "Structural grouping used to include AS_PATH manipulation configuration and state for both BGP neighbors and peer groups"; container as-path-options { description "AS_PATH manipulation parameters for the BGP neighbor or group"; leaf allow-own-as { type uint8; default 0; description "Specify the number of occurrences of the local BGP speaker's AS that can occur within the AS_PATH before it is rejected."; } leaf replace-peer-as { type boolean; default "false"; Patel, et al. Expires November 11, 2018 [Page 31] Internet-Draft BGP Model May 2018 description "Replace occurrences of the peer's AS in the AS_PATH with the local autonomous system number"; } } } grouping bgp-common-structure-neighbor-group-add-paths { description "Structural grouping used to include ADD-PATHs configuration and state for both BGP neighbors and peer groups"; container add-paths { description "Parameters relating to the advertisement and receipt of multiple paths for a single NLRI (add-paths)"; leaf receive { type boolean; default false; description "Enable ability to receive multiple path advertisements for an NLRI from the neighbor or group"; } leaf send-max { type uint8; description "The maximum number of paths to advertise to neighbors for a single NLRI"; } leaf eligible-prefix-policy { type leafref { path "/rpol:routing-policy/rpol:policy-definitions/" + "rpol:policy-definition/rpol:name"; } description "A reference to a routing policy which can be used to restrict the prefixes for which add-paths is enabled"; } } } } file "ietf-bgp-peer-group@2018-05-09.yang" submodule ietf-bgp-peer-group { Patel, et al. Expires November 11, 2018 [Page 32] Internet-Draft BGP Model May 2018 yang-version "1.1"; belongs-to ietf-bgp { prefix "bgp"; } import ietf-routing-policy { prefix rpol; } // Include the common submodule include ietf-bgp-common; include ietf-bgp-common-multiprotocol; include ietf-bgp-common-structure; // meta organization "IETF IDR Working Group"; contact "WG Web: WG List: Editor: Mahesh Jethanandani (mjethanandani@gmail.com) Authors: Keyur Patel, Mahesh Jethanandani, Susan Hares"; description "This sub-module contains groupings that are specific to the peer-group context of the OpenConfig BGP module."; revision "2018-05-09" { description "Initial Version"; reference "RFC XXX, BGP Model for Service Provider Network."; } grouping bgp-peer-group-config { description "Configuration parameters relating to a base BGP peer group that are not also applicable to any other context (e.g., neighbor)"; leaf peer-group-name { type string; description "Name of the BGP peer-group"; Patel, et al. Expires November 11, 2018 [Page 33] Internet-Draft BGP Model May 2018 } } grouping bgp-peer-group-afi-safi-list { description "List of address-families associated with the BGP peer-group"; list afi-safi { key "afi-safi-name"; description "AFI,SAFI configuration available for the neighbour or group"; uses bgp-common-mp-afi-safi-config; container graceful-restart { description "Parameters relating to BGP graceful-restart"; uses bgp-common-mp-afi-safi-graceful-restart-config; } uses bgp-common-route-selection-options; uses bgp-common-global-group-use-multiple-paths; uses bgp-common-mp-all-afi-safi-list-contents; } } grouping bgp-peer-group-base { description "Parameters related to a BGP group"; uses bgp-peer-group-config; uses bgp-common-neighbor-group-config; uses bgp-common-state; container timers { description "Timers related to a BGP peer-group"; uses bgp-common-neighbor-group-timers-config; } container transport { description "Transport session parameters for the BGP peer-group"; Patel, et al. Expires November 11, 2018 [Page 34] Internet-Draft BGP Model May 2018 uses bgp-common-neighbor-group-transport-config; } container error-handling { description "Error handling parameters used for the BGP peer-group"; uses bgp-common-neighbor-group-error-handling-config; } container graceful-restart { description "Parameters relating the graceful restart mechanism for BGP"; uses bgp-common-graceful-restart-config; } uses bgp-common-structure-neighbor-group-logging-options; uses bgp-common-structure-neighbor-group-ebgp-multihop; uses bgp-common-structure-neighbor-group-route-reflector; uses bgp-common-structure-neighbor-group-as-path-options; uses bgp-common-structure-neighbor-group-add-paths; uses bgp-common-global-group-use-multiple-paths; uses rpol:apply-policy-group; container afi-safis { description "Per-address-family configuration parameters associated with thegroup"; uses bgp-peer-group-afi-safi-list; } } grouping bgp-peer-group-list { description "The list of BGP peer groups"; list peer-group { key "peer-group-name"; description "List of BGP peer-groups configured on the local system - uniquely identified by peer-group name"; uses bgp-peer-group-base; } } } Patel, et al. Expires November 11, 2018 [Page 35] Internet-Draft BGP Model May 2018 file "ietf-bgp-neighbor@2018-05-09.yang" submodule ietf-bgp-neighbor { yang-version "1.1"; belongs-to ietf-bgp { prefix "bgp"; } import ietf-routing-policy { prefix rpol; } import ietf-bgp-types { prefix bgp-types; } import ietf-inet-types { prefix inet; } import ietf-yang-types { prefix yang; } // Include the common submodule include ietf-bgp-common; include ietf-bgp-common-multiprotocol; include ietf-bgp-peer-group; include ietf-bgp-common-structure; // meta organization "IETF IDR Working Group"; contact "WG Web: WG List: Editor: Mahesh Jethanandani (mjethanandani@gmail.com) Authors: Keyur Patel, Mahesh Jethanandani, Susan Hares"; description "This sub-module contains groupings that are specific to the neighbor context of the OpenConfig BGP module."; revision "2018-05-09" { description "Initial Version"; reference "RFC XXX, BGP Model for Service Provider Network."; Patel, et al. Expires November 11, 2018 [Page 36] Internet-Draft BGP Model May 2018 } grouping bgp-neighbor-use-multiple-paths { description "Multi-path configuration and state applicable to a BGP neighbor"; container use-multiple-paths { description "Parameters related to the use of multiple-paths for the same NLRI when they are received only from this neighbor"; uses bgp-common-use-multiple-paths-config; container ebgp { description "Multi-path configuration for eBGP"; uses bgp-common-use-multiple-paths-ebgp-as-options-config; } } } grouping bgp-neighbor-counters-message-types-state { description "Grouping of BGP message types, included for re-use across counters"; leaf UPDATE { type uint64; description "Number of BGP UPDATE messages announcing, withdrawing or modifying paths exchanged."; } leaf NOTIFICATION { type uint64; description "Number of BGP NOTIFICATION messages indicating an error condition has occurred exchanged."; } } grouping bgp-neighbor-afi-safi-list { description "List of address-families associated with the BGP neighbor"; list afi-safi { key "afi-safi-name"; Patel, et al. Expires November 11, 2018 [Page 37] Internet-Draft BGP Model May 2018 description "AFI,SAFI configuration available for the neighbour or group"; uses bgp-common-mp-afi-safi-config; leaf active { type boolean; config false; description "This value indicates whether a particular AFI-SAFI has been succesfully negotiated with the peer. An AFI-SAFI may be enabled in the current running configuration, but a session restart may be required in order to negotiate the new capability."; } container prefixes { config false; description "Prefix counters for the BGP session"; leaf received { type uint32; description "The number of prefixes received from the neighbor"; } leaf sent { type uint32; description "The number of prefixes advertised to the neighbor"; } leaf installed { type uint32; description "The number of advertised prefixes installed in the Loc-RIB"; } } container graceful-restart { description "Parameters relating to BGP graceful-restart"; uses bgp-common-mp-afi-safi-graceful-restart-config; leaf received { type boolean; Patel, et al. Expires November 11, 2018 [Page 38] Internet-Draft BGP Model May 2018 config false; description "This leaf indicates whether the neighbor advertised the ability to support graceful-restart for this AFI-SAFI"; } leaf advertised { type boolean; config false; description "This leaf indicates whether the ability to support graceful-restart has been advertised to the peer"; } } uses bgp-common-mp-all-afi-safi-list-contents; uses bgp-neighbor-use-multiple-paths; } } grouping bgp-neighbor-base { description "Parameters related to a BGP neighbor"; leaf peer-group { type leafref { path "../../../peer-groups/peer-group/peer-group-name"; } description "The peer-group with which this neighbor is associated"; } leaf neighbor-address { type inet:ip-address; description "Address of the BGP peer, either in IPv4 or IPv6"; } leaf enabled { type boolean; default true; description "Whether the BGP peer is enabled. In cases where the enabled leaf is set to false, the local system should not initiate connections to the neighbor, and should not respond to TCP connections attempts from the neighbor. If the state of the BGP session is ESTABLISHED at the time that this leaf is set to false, the BGP session should be ceased."; Patel, et al. Expires November 11, 2018 [Page 39] Internet-Draft BGP Model May 2018 } uses bgp-common-neighbor-group-config; leaf session-state { type enumeration { enum IDLE { description "neighbor is down, and in the Idle state of the FSM"; } enum CONNECT { description "neighbor is down, and the session is waiting for the underlying transport session to be established"; } enum ACTIVE { description "neighbor is down, and the local system is awaiting a connection from the remote peer"; } enum OPENSENT { description "neighbor is in the process of being established. The local system has sent an OPEN message"; } enum OPENCONFIRM { description "neighbor is in the process of being established. The local system is awaiting a NOTIFICATION or KEEPALIVE message"; } enum ESTABLISHED { description "neighbor is up - the BGP session with the peer is established"; } } config false; description "Operational state of the BGP peer"; } leaf last-established { // Was oc-types:timeticks64 type uint64; config false; description "This timestamp indicates the time that the BGP session last Patel, et al. Expires November 11, 2018 [Page 40] Internet-Draft BGP Model May 2018 transitioned in or out of the Established state. The value is the timestamp in seconds relative to the Unix Epoch (Jan 1, 1970 00:00:00 UTC). The BGP session uptime can be computed by clients as the difference between this value and the current time in UTC (assuming the session is in the ESTABLISHED state, per the session-state leaf)."; } leaf established-transitions { type yang:counter64; config false; description "Number of transitions to the Established state for the neighbor session. This value is analogous to the bgpPeerFsmEstablishedTransitions object from the standard BGP-4 MIB"; reference "RFC 4273 - Definitions of Managed Objects for BGP-4"; } leaf-list supported-capabilities { type identityref { base bgp-types:BGP_CAPABILITY; } config false; description "BGP capabilities negotiated as supported with the peer"; } container messages { config false; description "Counters for BGP messages sent and received from the neighbor"; container sent { description "Counters relating to BGP messages sent to the neighbor"; uses bgp-neighbor-counters-message-types-state; } container received { description "Counters for BGP messages received from the neighbor"; uses bgp-neighbor-counters-message-types-state; } } Patel, et al. Expires November 11, 2018 [Page 41] Internet-Draft BGP Model May 2018 container queues { config false; description "Counters related to queued messages associated with the BGP neighbor"; leaf input { type uint32; description "The number of messages received from the peer currently queued"; } leaf output { type uint32; description "The number of messages queued to be sent to the peer"; } } container timers { description "Timers related to a BGP neighbor"; uses bgp-common-neighbor-group-timers-config; leaf negotiated-hold-time { type decimal64 { fraction-digits 2; } config false; description "The negotiated hold-time for the BGP session"; } } container transport { description "Transport session parameters for the BGP neighbor"; uses bgp-common-neighbor-group-transport-config; leaf local-port { type inet:port-number; config false; description "Local TCP port being used for the TCP session supporting the BGP session"; Patel, et al. Expires November 11, 2018 [Page 42] Internet-Draft BGP Model May 2018 } leaf remote-address { type inet:ip-address; config false; description "Remote address to which the BGP session has been established"; } leaf remote-port { type inet:port-number; config false; description "Remote port being used by the peer for the TCP session supporting the BGP session"; } } container error-handling { description "Error handling parameters used for the BGP neighbor or group"; uses bgp-common-neighbor-group-error-handling-config; leaf erroneous-update-messages { type uint32; config false; description "The number of BGP UPDATE messages for which the treat-as-withdraw mechanism has been applied based on erroneous message contents"; } } container graceful-restart { description "Parameters relating the graceful restart mechanism for BGP"; uses bgp-common-graceful-restart-config; leaf peer-restart-time { type uint16 { range 0..4096; } config false; description "The period of time (advertised by the peer) that the peer Patel, et al. Expires November 11, 2018 [Page 43] Internet-Draft BGP Model May 2018 expects a restart of a BGP session to take"; } leaf peer-restarting { type boolean; config false; description "This flag indicates whether the remote neighbor is currently in the process of restarting, and hence received routes are currently stale"; } leaf local-restarting { type boolean; config false; description "This flag indicates whether the local neighbor is currently restarting. The flag is unset after all NLRI have been advertised to the peer, and the End-of-RIB (EOR) marker has been unset"; } leaf mode { type enumeration { enum HELPER_ONLY { description "The local router is operating in helper-only mode, and hence will not retain forwarding state during a local session restart, but will do so during a restart of the remote peer"; } enum BILATERAL { description "The local router is operating in both helper mode, and hence retains forwarding state during a remote restart, and also maintains forwarding state during local session restart"; } enum REMOTE_HELPER { description "The local system is able to retain routes during restart but the remote system is only able to act as a helper"; } } config false; description "This leaf indicates the mode of operation of BGP graceful Patel, et al. Expires November 11, 2018 [Page 44] Internet-Draft BGP Model May 2018 restart with the peer"; } } uses bgp-common-structure-neighbor-group-logging-options; uses bgp-common-structure-neighbor-group-ebgp-multihop; uses bgp-common-structure-neighbor-group-route-reflector; uses bgp-common-structure-neighbor-group-as-path-options; uses bgp-common-structure-neighbor-group-add-paths; uses bgp-neighbor-use-multiple-paths; uses rpol:apply-policy-group; container afi-safis { description "Per-address-family configuration parameters associated with the neighbor"; uses bgp-neighbor-afi-safi-list; } } grouping bgp-neighbor-list { description "The list of BGP neighbors"; list neighbor { key "neighbor-address"; description "List of BGP neighbors configured on the local system, uniquely identified by peer IPv[46] address"; uses bgp-neighbor-base; } } } file "ietf-bgp-global@2018-05-09.yang" submodule ietf-bgp-global { yang-version "1.1"; belongs-to ietf-bgp { prefix bgp; } import ietf-inet-types { prefix inet; } import ietf-yang-types { Patel, et al. Expires November 11, 2018 [Page 45] Internet-Draft BGP Model May 2018 prefix yang; } include ietf-bgp-common; include ietf-bgp-common-multiprotocol; organization "IETF IDR Working Group"; contact "WG Web: WG List: Editor: Mahesh Jethanandani (mjethanandani@gmail.com) Authors: Keyur Patel, Mahesh Jethanandani, Susan Hares"; description "This sub-module contains groupings that are specific to the global context of the BGP module"; revision "2018-05-09" { description "Initial Version"; reference "RFC XXX, BGP Model for Service Provider Network."; } grouping bgp-global-config { description "Global configuration options for the BGP router."; leaf as { type inet:as-number; mandatory true; description "Local autonomous system number of the router. Uses the 32-bit as-number type from the model in RFC 6991."; } leaf router-id { type yang:dotted-quad; description "Router id of the router - an unsigned 32-bit integer expressed in dotted quad notation."; reference "RFC4271 - A Border Gateway Protocol 4 (BGP-4), Patel, et al. Expires November 11, 2018 [Page 46] Internet-Draft BGP Model May 2018 Section 4.2"; } } grouping bgp-global-state { description "Operational state parameters for the BGP neighbor"; uses bgp-common-state; } grouping bgp-global-default-route-distance-config { description "Configuration options relating to the administrative distance (or preference) assigned to routes received from different sources (external, internal, and local)."; leaf external-route-distance { type uint8 { range "1..255"; } description "Administrative distance for routes learned from external BGP (eBGP)."; } leaf internal-route-distance { type uint8 { range "1..255"; } description "Administrative distance for routes learned from internal BGP (iBGP)."; } } grouping bgp-global-confederation-config { description "Configuration options specifying parameters when the local router is within an autonomous system which is part of a BGP confederation."; leaf enabled { type boolean; description "When this leaf is set to true it indicates that the local-AS is part of a BGP confederation"; } Patel, et al. Expires November 11, 2018 [Page 47] Internet-Draft BGP Model May 2018 leaf identifier { type inet:as-number; description "Confederation identifier for the autonomous system."; } leaf-list member-as { type inet:as-number; description "Remote autonomous systems that are to be treated as part of the local confederation."; } } grouping bgp-global-afi-safi-list { description "List of address-families associated with the BGP instance"; list afi-safi { key "afi-safi-name"; description "AFI,SAFI configuration available for the neighbour or group"; uses bgp-common-mp-afi-safi-config; uses bgp-common-state; container graceful-restart { description "Parameters relating to BGP graceful-restart"; uses bgp-common-mp-afi-safi-graceful-restart-config; } uses bgp-common-route-selection-options; uses bgp-common-global-group-use-multiple-paths; uses bgp-common-mp-all-afi-safi-list-contents; } } // Structural groupings grouping bgp-global-base { description "Global configuration parameters for the BGP router"; uses bgp-global-config; uses bgp-global-state; Patel, et al. Expires November 11, 2018 [Page 48] Internet-Draft BGP Model May 2018 container default-route-distance { description "Administrative distance (or preference) assigned to routes received from different sources (external, internal, and local)."; uses bgp-global-default-route-distance-config; } container confederation { description "Parameters indicating whether the local system acts as part of a BGP confederation"; uses bgp-global-confederation-config; } container graceful-restart { description "Parameters relating the graceful restart mechanism for BGP"; uses bgp-common-graceful-restart-config; } uses bgp-common-global-group-use-multiple-paths; uses bgp-common-route-selection-options; container afi-safis { description "Address family specific configuration"; uses bgp-global-afi-safi-list; } } } 8. BGP types file "ietf-bgp-types@2018-05-09.yang" module ietf-bgp-types { yang-version "1.1"; namespace "urn:ietf:params:xml:ns:yang:ietf-bgp-types"; prefix "bgp-types"; import ietf-inet-types { prefix inet; Patel, et al. Expires November 11, 2018 [Page 49] Internet-Draft BGP Model May 2018 } // meta organization "IETF IDR Working Group"; contact "WG Web: WG List: Editor: Mahesh Jethanandani (mjethanandani@gmail.com) Authors: Keyur Patel, Mahesh Jethanandani, Susan Hares"; description "This module contains general data definitions for use in BGP policy. It can be imported by modules that make use of BGP attributes"; revision "2018-05-09" { description "Initial Version"; reference "RFC XXX, BGP Model for Service Provider Network."; } identity BGP_CAPABILITY { description "Base identity for a BGP capability"; } identity MPBGP { base BGP_CAPABILITY; description "Multi-protocol extensions to BGP"; reference "RFC2858"; } identity ROUTE_REFRESH { base BGP_CAPABILITY; description "The BGP route-refresh functionality"; reference "RFC2918"; } identity ASN32 { base BGP_CAPABILITY; description Patel, et al. Expires November 11, 2018 [Page 50] Internet-Draft BGP Model May 2018 "4-byte (32-bit) AS number functionality"; reference "RFC6793"; } identity GRACEFUL_RESTART { base BGP_CAPABILITY; description "Graceful restart functionality"; reference "RFC4724"; } identity ADD_PATHS { base BGP_CAPABILITY; description "BGP add-paths"; reference "draft-ietf-idr-add-paths"; } identity AFI_SAFI_TYPE { description "Base identity type for AFI,SAFI tuples for BGP-4"; reference "RFC4760 - multi-protocol extensions for BGP-4"; } identity IPV4_UNICAST { base AFI_SAFI_TYPE; description "IPv4 unicast (AFI,SAFI = 1,1)"; reference "RFC4760"; } identity IPV6_UNICAST { base AFI_SAFI_TYPE; description "IPv6 unicast (AFI,SAFI = 2,1)"; reference "RFC4760"; } identity IPV4_LABELED_UNICAST { base AFI_SAFI_TYPE; description "Labeled IPv4 unicast (AFI,SAFI = 1,4)"; reference "RFC3107"; } identity IPV6_LABELED_UNICAST { base AFI_SAFI_TYPE; description Patel, et al. Expires November 11, 2018 [Page 51] Internet-Draft BGP Model May 2018 "Labeled IPv6 unicast (AFI,SAFI = 2,4)"; reference "RFC3107"; } identity L3VPN_IPV4_UNICAST { base AFI_SAFI_TYPE; description "Unicast IPv4 MPLS L3VPN (AFI,SAFI = 1,128)"; reference "RFC4364"; } identity L3VPN_IPV6_UNICAST { base AFI_SAFI_TYPE; description "Unicast IPv6 MPLS L3VPN (AFI,SAFI = 2,128)"; reference "RFC4659"; } identity L3VPN_IPV4_MULTICAST { base AFI_SAFI_TYPE; description "Multicast IPv4 MPLS L3VPN (AFI,SAFI = 1,129)"; reference "RFC6514"; } identity L3VPN_IPV6_MULTICAST { base AFI_SAFI_TYPE; description "Multicast IPv6 MPLS L3VPN (AFI,SAFI = 2,129)"; reference "RFC6514"; } identity L2VPN_VPLS { base AFI_SAFI_TYPE; description "BGP-signalled VPLS (AFI,SAFI = 25,65)"; reference "RFC4761"; } identity L2VPN_EVPN { base AFI_SAFI_TYPE; description "BGP MPLS Based Ethernet VPN (AFI,SAFI = 25,70)"; } identity BGP_WELL_KNOWN_STD_COMMUNITY { description "Reserved communities within the standard community space Patel, et al. Expires November 11, 2018 [Page 52] Internet-Draft BGP Model May 2018 defined by RFC1997. These communities must fall within the range 0x00000000 to 0xFFFFFFFF"; reference "RFC1997"; } identity NO_EXPORT { base BGP_WELL_KNOWN_STD_COMMUNITY; description "Do not export NLRI received carrying this community outside the bounds of this autonomous system, or this confederation if the local autonomous system is a confederation member AS. This community has a value of 0xFFFFFF01."; reference "RFC1997"; } identity NO_ADVERTISE { base BGP_WELL_KNOWN_STD_COMMUNITY; description "All NLRI received carrying this community must not be advertised to other BGP peers. This community has a value of 0xFFFFFF02."; reference "RFC1997"; } identity NO_EXPORT_SUBCONFED { base BGP_WELL_KNOWN_STD_COMMUNITY; description "All NLRI received carrying this community must not be advertised to external BGP peers - including over confederation sub-AS boundaries. This community has a value of 0xFFFFFF03."; reference "RFC1997"; } identity NOPEER { base BGP_WELL_KNOWN_STD_COMMUNITY; description "An autonomous system receiving NLRI tagged with this community is advised not to re-advertise the NLRI to external bi-lateral peer autonomous systems. An AS may also filter received NLRI from bilateral peer sessions when they are tagged with this community value"; reference "RFC3765"; } typedef bgp-session-direction { type enumeration { enum INBOUND { description Patel, et al. Expires November 11, 2018 [Page 53] Internet-Draft BGP Model May 2018 "Refers to all NLRI received from the BGP peer"; } enum OUTBOUND { description "Refers to all NLRI advertised to the BGP peer"; } } description "Type to describe the direction of NLRI transmission"; } typedef bgp-well-known-community-type { type identityref { base BGP_WELL_KNOWN_STD_COMMUNITY; } description "Type definition for well-known IETF community attribute values"; reference "IANA Border Gateway Protocol (BGP) Well Known Communities"; } typedef bgp-std-community-type { // TODO: further refine restrictions and allowed patterns // 4-octet value: // 2 octets // 2 octets type union { type uint32 { // per RFC 1997, 0x00000000 - 0x0000FFFF and 0xFFFF0000 - // 0xFFFFFFFF are reserved range "65536..4294901759"; // 0x00010000..0xFFFEFFFF } type string { pattern '([0-9]+:[0-9]+)'; } } description "Type definition for standard community attributes"; reference "RFC 1997 - BGP Communities Attribute"; } typedef bgp-ext-community-type { // TODO: needs more work to make this more precise given the // variability of extended community attribute specifications // 8-octet value: // 2 octects Patel, et al. Expires November 11, 2018 [Page 54] Internet-Draft BGP Model May 2018 // 6 octets type union { type string { // Type 1: 2-octet global and 4-octet local // (AS number) (Integer) pattern '(6[0-5][0-5][0-3][0-5]|[1-5][0-9]{4}|' + '[1-9][0-9]{1,4}|[0-9]):' + '(4[0-2][0-9][0-4][0-9][0-6][0-7][0-2][0-9][0-6]|' + '[1-3][0-9]{9}|[1-9]([0-9]{1,7})?[0-9]|[1-9])'; } type string { // Type 2: 4-octet global and 2-octet local // (ipv4-address) (integer) pattern '(([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|' + '25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9][0-9]|' + '2[0-4][0-9]|25[0-5]):' + '(6[0-5][0-5][0-3][0-5]|[1-5][0-9]{4}|' + '[1-9][0-9]{1,4}|[0-9])'; } type string { // route-target with Type 1 // route-target:(ASN):(local-part) pattern 'route\-target:(6[0-5][0-5][0-3][0-5]|' + '[1-5][0-9]{4}|[1-9][0-9]{1,4}|[0-9]):' + '(4[0-2][0-9][0-4][0-9][0-6][0-7][0-2][0-9][0-6]|' + '[1-3][0-9]{9}|[1-9]([0-9]{1,7})?[0-9]|[1-9])'; } type string { // route-target with Type 2 // route-target:(IPv4):(local-part) pattern 'route\-target:' + '(([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|' + '25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9][0-9]|' + '2[0-4][0-9]|25[0-5]):' + '(6[0-5][0-5][0-3][0-5]|[1-5][0-9]{4}|' + '[1-9][0-9]{1,4}|[0-9])'; } type string { // route-origin with Type 1 pattern 'route\-origin:(6[0-5][0-5][0-3][0-5]|' + '[1-5][0-9]{4}|[1-9][0-9]{1,4}|[0-9]):' + '(4[0-2][0-9][0-4][0-9][0-6][0-7][0-2][0-9][0-6]|' + '[1-3][0-9]{9}|[1-9]([0-9]{1,7})?[0-9]|[1-9])'; } type string { // route-origin with Type 2 pattern 'route\-origin:' + Patel, et al. Expires November 11, 2018 [Page 55] Internet-Draft BGP Model May 2018 '(([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|' + '25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9][0-9]|' + '2[0-4][0-9]|25[0-5]):' + '(6[0-5][0-5][0-3][0-5]|[1-5][0-9]{4}|' + '[1-9][0-9]{1,4}|[0-9])'; } } description "Type definition for extended community attributes"; reference "RFC 4360 - BGP Extended Communities Attribute"; } typedef bgp-community-regexp-type { // TODO: needs more work to decide what format these regexps can // take. //type oc-types:std-regexp; type string; description "Type definition for communities specified as regular expression patterns"; } typedef bgp-origin-attr-type { type enumeration { enum IGP { description "Origin of the NLRI is internal"; } enum EGP { description "Origin of the NLRI is EGP"; } enum INCOMPLETE { description "Origin of the NLRI is neither IGP or EGP"; } } description "Type definition for standard BGP origin attribute"; reference "RFC 4271 - A Border Gateway Protocol 4 (BGP-4), Sec 4.3"; } typedef peer-type { type enumeration { enum INTERNAL { description "internal (iBGP) peer"; } enum EXTERNAL { description "external (eBGP) peer"; } Patel, et al. Expires November 11, 2018 [Page 56] Internet-Draft BGP Model May 2018 } description "labels a peer or peer group as explicitly internal or external"; } identity REMOVE_PRIVATE_AS_OPTION { description "Base identity for options for removing private autonomous system numbers from the AS_PATH attribute"; } identity PRIVATE_AS_REMOVE_ALL { base REMOVE_PRIVATE_AS_OPTION; description "Strip all private autonmous system numbers from the AS_PATH. This action is performed regardless of the other content of the AS_PATH attribute, and for all instances of private AS numbers within that attribute."; } identity PRIVATE_AS_REPLACE_ALL { base REMOVE_PRIVATE_AS_OPTION; description "Replace all instances of private autonomous system numbers in the AS_PATH with the local BGP speaker's autonomous system number. This action is performed regardless of the other content of the AS_PATH attribute, and for all instances of private AS number within that attribute."; } typedef remove-private-as-option { type identityref { base REMOVE_PRIVATE_AS_OPTION; } description "set of options for configuring how private AS path numbers are removed from advertisements"; } typedef percentage { type uint8 { range "0..100"; } description "Integer indicating a percentage value"; } Patel, et al. Expires November 11, 2018 [Page 57] Internet-Draft BGP Model May 2018 typedef rr-cluster-id-type { type union { type uint32; type inet:ipv4-address; } description "union type for route reflector cluster ids: option 1: 4-byte number option 2: IP address"; } typedef community-type { type enumeration { enum STANDARD { description "send only standard communities"; } enum EXTENDED { description "send only extended communities"; } enum BOTH { description "send both standard and extended communities"; } enum NONE { description "do not send any community attribute"; } } description "type describing variations of community attributes: STANDARD: standard BGP community [rfc1997] EXTENDED: extended BGP community [rfc4360] BOTH: both standard and extended community"; } } 9. BGP policy data file "ietf-bgp-policy@2018-05-09.yang" module ietf-bgp-policy { yang-version "1.1"; // namespace namespace "urn:ietf:params:xml:ns:yang:ietf-bgp-policy"; prefix "bgp-pol"; // import some basic types Patel, et al. Expires November 11, 2018 [Page 58] Internet-Draft BGP Model May 2018 import ietf-inet-types { prefix inet; } import ietf-routing-policy { prefix rpol; } import ietf-bgp-types { prefix bgp-types; } import ietf-routing-types { prefix rt-types; } // meta organization "IETF IDR Working Group"; contact "WG Web: WG List: Editor: Mahesh Jethanandani (mjethanandani@gmail.com) Authors: Keyur Patel, Mahesh Jethanandani, Susan Hares"; description "This module contains data definitions for BGP routing policy. It augments the base routing-policy module with BGP-specific options for conditions and actions."; revision "2018-05-09" { description "Initial Version"; reference "RFC XXX, BGP Model for Service Provider Network."; } // typedef statements typedef bgp-set-community-option-type { type enumeration { enum ADD { description "add the specified communities to the existing community attribute"; Patel, et al. Expires November 11, 2018 [Page 59] Internet-Draft BGP Model May 2018 } enum REMOVE { description "remove the specified communities from the existing community attribute"; } enum REPLACE { description "replace the existing community attribute with the specified communities. If an empty set is specified, this removes the community attribute from the route."; } } description "Type definition for options when setting the community attribute in a policy action"; } typedef bgp-next-hop-type { type union { type inet:ip-address-no-zone; type enumeration { enum SELF { description "special designation for local router's own address, i.e., next-hop-self"; } } } description "type definition for specifying next-hop in policy actions"; } typedef bgp-set-med-type { type union { type uint32; type string { pattern "^[+-][0-9]+"; } type enumeration { enum IGP { description "set the MED value to the IGP cost toward the next hop for the route"; } } } description "Type definition for specifying how the BGP MED can Patel, et al. Expires November 11, 2018 [Page 60] Internet-Draft BGP Model May 2018 be set in BGP policy actions. The three choices are to set the MED directly, increment/decrement using +/- notation, and setting it to the IGP cost (predefined value)."; } // grouping statements grouping match-community-top { description "Top-level grouping for match conditions on communities"; container match-community-set { description "Top-level container for match conditions on communities. Match a referenced community-set according to the logic defined in the match-set-options leaf"; leaf community-set { type leafref { path "/rpol:routing-policy/rpol:defined-sets/" + "bgp-pol:bgp-defined-sets/bgp-pol:community-sets/" + "bgp-pol:community-set/bgp-pol:community-set-name"; } description "References a defined community set"; } uses rpol:match-set-options-group; } } grouping match-ext-community-top { description "Top-level grouping for match conditions on extended communities"; container match-ext-community-set { description "Match a referenced extended community-set according to the logic defined in the match-set-options leaf"; leaf ext-community-set { type leafref { path "/rpol:routing-policy/rpol:defined-sets/" + "bgp-pol:bgp-defined-sets/bgp-pol:ext-community-sets/" + Patel, et al. Expires November 11, 2018 [Page 61] Internet-Draft BGP Model May 2018 "bgp-pol:ext-community-set/" + "bgp-pol:ext-community-set-name"; } description "References a defined extended community set"; } uses rpol:match-set-options-group; } } grouping match-as-path-top { description "Top-level grouping for match conditions on AS path set"; container match-as-path-set { description "Match a referenced as-path set according to the logic defined in the match-set-options leaf"; leaf as-path-set { type leafref { path "/rpol:routing-policy/rpol:defined-sets/" + "bgp-pol:bgp-defined-sets/bgp-pol:as-path-sets/" + "bgp-pol:as-path-set/bgp-pol:as-path-set-name"; } description "References a defined AS path set"; } uses rpol:match-set-options-group; } } grouping bgp-match-set-conditions { description "Condition statement definitions for checking membership in a defined set"; uses match-community-top; uses match-ext-community-top; uses match-as-path-top; } grouping community-count-top { description "Top-level grouping for community count condition"; container community-count { description "Value and comparison operations for conditions based on the Patel, et al. Expires November 11, 2018 [Page 62] Internet-Draft BGP Model May 2018 number of communities in the route update"; } } grouping as-path-length-top { description "Top-level grouping for AS path length condition"; container as-path-length { description "Value and comparison operations for conditions based on the length of the AS path in the route update"; } } grouping bgp-conditions-top { description "Top-level grouping for BGP-specific policy conditions"; container bgp-conditions { description "Top-level container "; leaf med-eq { type uint32; description "Condition to check if the received MED value is equal to the specified value"; } leaf origin-eq { type bgp-types:bgp-origin-attr-type; description "Condition to check if the route origin is equal to the specified value"; } leaf-list next-hop-in { type inet:ip-address-no-zone; description "List of next hop addresses to check for in the route update"; } leaf-list afi-safi-in { type identityref { base bgp-types:AFI_SAFI_TYPE; } Patel, et al. Expires November 11, 2018 [Page 63] Internet-Draft BGP Model May 2018 description "List of address families which the NLRI may be within"; } leaf local-pref-eq { type uint32; // TODO: add support for other comparisons if needed description "Condition to check if the local pref attribute is equal to the specified value"; } leaf route-type { // TODO: verify extent of vendor support for this comparison type enumeration { enum INTERNAL { description "route type is internal"; } enum EXTERNAL { description "route type is external"; } } description "Condition to check the route type in the route update"; } uses community-count-top; uses as-path-length-top; uses bgp-match-set-conditions; } } grouping community-set-top { description "Top-level grouping for BGP community sets"; container community-sets { description "Enclosing container for list of defined BGP community sets"; list community-set { key "community-set-name"; description "List of defined BGP community sets"; leaf community-set-name { type string; mandatory true; Patel, et al. Expires November 11, 2018 [Page 64] Internet-Draft BGP Model May 2018 description "name / label of the community set -- this is used to reference the set in match conditions"; } leaf-list community-member { type union { type bgp-types:bgp-std-community-type; type bgp-types:bgp-community-regexp-type; type bgp-types:bgp-well-known-community-type; } description "members of the community set"; } } } } grouping ext-community-set-top { description "Top-level grouping for extended BGP community sets"; container ext-community-sets { description "Enclosing container for list of extended BGP community sets"; list ext-community-set { key "ext-community-set-name"; description "List of defined extended BGP community sets"; leaf ext-community-set-name { type string; description "name / label of the extended community set -- this is used to reference the set in match conditions"; } leaf-list ext-community-member { type union { type rt-types:route-target; type bgp-types:bgp-community-regexp-type; } description "members of the extended community set"; } } } Patel, et al. Expires November 11, 2018 [Page 65] Internet-Draft BGP Model May 2018 } grouping as-path-set-top { description "Top-level grouping for AS path sets"; container as-path-sets { description "Enclosing container for list of define AS path sets"; list as-path-set { key "as-path-set-name"; description "List of defined AS path sets"; leaf as-path-set-name { type string; description "name of the AS path set -- this is used to reference the set in match conditions"; } leaf-list as-path-set-member { // TODO: need to refine typedef for AS path expressions type string; description "AS path expression -- list of ASes in the set"; } } } } // augment statements augment "/rpol:routing-policy/rpol:defined-sets" { description "adds BGP defined sets container to routing policy model"; container bgp-defined-sets { description "BGP-related set definitions for policy match conditions"; uses community-set-top; uses ext-community-set-top; uses as-path-set-top; } } Patel, et al. Expires November 11, 2018 [Page 66] Internet-Draft BGP Model May 2018 grouping as-path-prepend-top { description "Top-level grouping for the AS path prepend action"; container set-as-path-prepend { description "action to prepend local AS number to the AS-path a specified number of times"; leaf repeat-n { type uint8 { range 1..max; } description "Number of times to prepend the local AS number to the AS path. The value should be between 1 and the maximum supported by the implementation."; } } } grouping set-community-action-common { description "Common leaves for set-community and set-ext-community actions"; leaf method { type enumeration { enum INLINE { description "The extended communities are specified inline as a list"; } enum REFERENCE { description "The extended communities are specified by referencing a defined ext-community set"; } } description "Indicates the method used to specify the extended communities for the set-ext-community action"; } leaf options { type bgp-set-community-option-type; description "Options for modifying the community attribute with Patel, et al. Expires November 11, 2018 [Page 67] Internet-Draft BGP Model May 2018 the specified values. These options apply to both methods of setting the community attribute."; } } grouping set-community-inline-top { description "Top-level grouping or inline specification of set-community action"; container inline { when "../config/method=INLINE" { description "Active only when the set-community method is INLINE"; } description "Set the community values for the action inline with a list."; leaf-list communities { type union { type bgp-types:bgp-std-community-type; type bgp-types:bgp-well-known-community-type; } description "Set the community values for the update inline with a list."; } } } grouping set-community-reference-top { description "Top-level grouping for referencing a community-set in the set-community action"; container reference { when "../config/method=REFERENCE" { description "Active only when the set-community method is REFERENCE"; } description "Provide a reference to a defined community set for the set-community action"; leaf community-set-ref { type leafref { path "/rpol:routing-policy/rpol:defined-sets/" + Patel, et al. Expires November 11, 2018 [Page 68] Internet-Draft BGP Model May 2018 "bgp-pol:bgp-defined-sets/" + "bgp-pol:community-sets/bgp-pol:community-set/" + "bgp-pol:community-set-name"; } description "References a defined community set by name"; } } } grouping set-community-action-top { description "Top-level grouping for the set-community action"; container set-community { description "Action to set the community attributes of the route, along with options to modify how the community is modified. Communities may be set using an inline list OR reference to an existing defined set (not both)."; uses set-community-action-common; uses set-community-inline-top; uses set-community-reference-top; } } grouping set-ext-community-inline-top { description "Top-level grouping or inline specification of set-ext-community action"; container inline { when "../config/method=INLINE" { description "Active only when the set-community method is INLINE"; } description "Set the extended community values for the action inline with a list."; leaf-list communities { type union { type rt-types:route-target; type bgp-types:bgp-well-known-community-type; } description "Set the extended community values for the update inline Patel, et al. Expires November 11, 2018 [Page 69] Internet-Draft BGP Model May 2018 with a list."; } } } grouping set-ext-community-reference-top { description "Top-level grouping for referening an extended community-set in the set-community action"; container reference { when "../config/method=REFERENCE" { description "Active only when the set-community method is REFERENCE"; } description "Provide a reference to an extended community set for the set-ext-community action"; leaf ext-community-set-ref { type leafref { path "/rpol:routing-policy/rpol:defined-sets/" + "bgp-pol:bgp-defined-sets/bgp-pol:ext-community-sets/" + "bgp-pol:ext-community-set/" + "bgp-pol:ext-community-set-name"; } description "References a defined extended community set by name"; } } } grouping set-ext-community-action-top { description "Top-level grouping for the set-ext-community action"; container set-ext-community { description "Action to set the extended community attributes of the route, along with options to modify how the community is modified. Extended communities may be set using an inline list OR a reference to an existing defined set (but not both)."; uses set-community-action-common; uses set-ext-community-inline-top; uses set-ext-community-reference-top; Patel, et al. Expires November 11, 2018 [Page 70] Internet-Draft BGP Model May 2018 } } grouping bgp-actions-top { description "Top-level grouping for BGP-specific actions"; container bgp-actions { description "Top-level container for BGP-specific actions"; leaf set-route-origin { type bgp-types:bgp-origin-attr-type; description "set the origin attribute to the specified value"; } leaf set-local-pref { type uint32; description "set the local pref attribute on the route update"; } leaf set-next-hop { type bgp-next-hop-type; description "set the next-hop attribute in the route update"; } leaf set-med { type bgp-set-med-type; description "set the med metric attribute in the route update"; } uses as-path-prepend-top; uses set-community-action-top; uses set-ext-community-action-top; } } augment "/rpol:routing-policy/rpol:policy-definitions/" + "rpol:policy-definition/rpol:statements/rpol:statement/" + "rpol:conditions" { description "BGP policy conditions added to routing policy module"; uses bgp-conditions-top; } Patel, et al. Expires November 11, 2018 [Page 71] Internet-Draft BGP Model May 2018 augment "/rpol:routing-policy/rpol:policy-definitions/" + "rpol:policy-definition/rpol:statements/rpol:statement/" + "rpol:actions" { description "BGP policy actions added to routing policy module"; uses bgp-actions-top; } // rpc statements // notification statements } 10. Contributors Previous versions of this document saw contributions from Anees Shaikh, Rob Shakir, Kevin D'Souza, Alexander Clemm, Aleksandr Zhadkin, and Xyfeng Liu. 11. Acknowledgements The authors are grateful for valuable contributions to this document and the associated models from: Ebben Aires, Pavan Beeram, Chris Chase, Ed Crabbe, Luyuan Fang, Bill Fenner, Akshay Gattani, Josh George, Vijay Gill, Matt John, Jeff Haas, Dhanendra Jain, Acee Lindem, Ina Minei, Carl Moberg, Ashok Narayanan, Einar Nilsen- Nygaard, Adam Simpson, Puneet Sood, Jason Sterne, Jeff Tantsura, Jim Uttaro, and Gunter Vandevelde. 12. References 12.1. Normative references [I-D.ietf-rtgwg-ni-model] Berger, L., Hopps, C., Lindem, A., Bogdanovic, D., and X. Liu, "YANG Model for Network Instances", draft-ietf-rtgwg- ni-model-12 (work in progress), March 2018. [RFC1997] Chandra, R., Traina, P., and T. Li, "BGP Communities Attribute", RFC 1997, DOI 10.17487/RFC1997, August 1996, . [RFC2439] Villamizar, C., Chandra, R., and R. Govindan, "BGP Route Flap Damping", RFC 2439, DOI 10.17487/RFC2439, November 1998, . Patel, et al. Expires November 11, 2018 [Page 72] Internet-Draft BGP Model May 2018 [RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, DOI 10.17487/RFC3688, January 2004, . [RFC4271] Rekhter, Y., Ed., Li, T., Ed., and S. Hares, Ed., "A Border Gateway Protocol 4 (BGP-4)", RFC 4271, DOI 10.17487/RFC4271, January 2006, . [RFC4456] Bates, T., Chen, E., and R. Chandra, "BGP Route Reflection: An Alternative to Full Mesh Internal BGP (IBGP)", RFC 4456, DOI 10.17487/RFC4456, April 2006, . [RFC4724] Sangli, S., Chen, E., Fernando, R., Scudder, J., and Y. Rekhter, "Graceful Restart Mechanism for BGP", RFC 4724, DOI 10.17487/RFC4724, January 2007, . [RFC4760] Bates, T., Chandra, R., Katz, D., and Y. Rekhter, "Multiprotocol Extensions for BGP-4", RFC 4760, DOI 10.17487/RFC4760, January 2007, . [RFC5065] Traina, P., McPherson, D., and J. Scudder, "Autonomous System Confederations for BGP", RFC 5065, DOI 10.17487/RFC5065, August 2007, . [RFC5246] Dierks, T. and E. Rescorla, "The Transport Layer Security (TLS) Protocol Version 1.2", RFC 5246, DOI 10.17487/RFC5246, August 2008, . [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, . Patel, et al. Expires November 11, 2018 [Page 73] Internet-Draft BGP Model May 2018 [RFC6811] Mohapatra, P., Scudder, J., Ward, D., Bush, R., and R. Austein, "BGP Prefix Origin Validation", RFC 6811, DOI 10.17487/RFC6811, January 2013, . [RFC6991] Schoenwaelder, J., Ed., "Common YANG Data Types", RFC 6991, DOI 10.17487/RFC6991, July 2013, . [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, . [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, . 12.2. Informative references [I-D.ietf-rtgwg-policy-model] Qu, Y., Tantsura, J., Lindem, A., Liu, X., and A. Shaikh, "A YANG Data Model for Routing Policy Management", draft- ietf-rtgwg-policy-model-02 (work in progress), 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, . Authors' Addresses Keyur Patel Arrcus CA USA Email: keyur@arrcus.com Patel, et al. Expires November 11, 2018 [Page 74] Internet-Draft BGP Model May 2018 Mahesh Jethanandani Email: mjethanandani@gmail.com Susan Hares Huawei 7453 Hickory Hill Saline, MI 48176 USA Email: shares@ndzh.com Patel, et al. Expires November 11, 2018 [Page 75]