A Common YANG Data Model for Attachment Circuits
draft-ietf-opsawg-teas-common-ac-12
Document | Type | Active Internet-Draft (opsawg WG) | |
---|---|---|---|
Authors | Mohamed Boucadair , Richard Roberts , Oscar Gonzalez de Dios , Samier Barguil , Bo Wu | ||
Last updated | 2024-07-24 | ||
Replaces | draft-boro-opsawg-teas-common-ac | ||
RFC stream | Internet Engineering Task Force (IETF) | ||
Intended RFC status | Proposed Standard | ||
Formats | |||
Yang Validation | 0 errors, 0 warnings | ||
Reviews |
YANGDOCTORS Early review
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by Ebben Aries
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Additional resources |
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Mailing list discussion |
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Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Reza Rokui | ||
Shepherd write-up | Show Last changed 2024-05-15 | ||
IESG | IESG state | Publication Requested | |
Action Holder | |||
Consensus boilerplate | Yes | ||
Telechat date | (None) | ||
Responsible AD | Mahesh Jethanandani | ||
Send notices to | rrokui@ciena.com |
draft-ietf-opsawg-teas-common-ac-12
OPSAWG M. Boucadair, Ed. Internet-Draft Orange Intended status: Standards Track R. Roberts, Ed. Expires: 25 January 2025 Juniper O. G. D. Dios Telefonica S. B. Giraldo Nokia B. Wu Huawei Technologies 24 July 2024 A Common YANG Data Model for Attachment Circuits draft-ietf-opsawg-teas-common-ac-12 Abstract The document specifies a common Attachment Circuits (ACs) YANG module, which is designed with the intent to be reusable by other models. For example, this common model can be reused by service models to expose ACs as a service, service models that require binding a service to a set of ACs, network and device models to provision ACs, etc. Discussion Venues This note is to be removed before publishing as an RFC. Discussion of this document takes place on the Operations and Management Area Working Group Working Group mailing list (opsawg@ietf.org), which is archived at https://mailarchive.ietf.org/arch/browse/opsawg/. Source for this draft and an issue tracker can be found at https://github.com/boucadair/attachment-circuit-model. 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/. Boucadair, et al. Expires 25 January 2025 [Page 1] Internet-Draft Common Attachment Circuit YANG July 2024 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 25 January 2025. Copyright Notice Copyright (c) 2024 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/ license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Revised BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Revised BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1. Editorial Note (To be removed by RFC Editor) . . . . . . 4 2. Conventions and Definitions . . . . . . . . . . . . . . . . . 5 3. Relationship to Other AC Data Models . . . . . . . . . . . . 6 4. Description of the AC Common YANG Module . . . . . . . . . . 7 4.1. Features . . . . . . . . . . . . . . . . . . . . . . . . 7 4.2. Identities . . . . . . . . . . . . . . . . . . . . . . . 7 4.3. Reusable Groupings . . . . . . . . . . . . . . . . . . . 8 5. Common Attachment Circuit YANG Module . . . . . . . . . . . . 16 6. Security Considerations . . . . . . . . . . . . . . . . . . . 51 7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 52 8. References . . . . . . . . . . . . . . . . . . . . . . . . . 53 8.1. Normative References . . . . . . . . . . . . . . . . . . 53 8.2. Informative References . . . . . . . . . . . . . . . . . 55 Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 58 Contributors . . . . . . . . . . . . . . . . . . . . . . . . . . 58 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 59 Boucadair, et al. Expires 25 January 2025 [Page 2] Internet-Draft Common Attachment Circuit YANG July 2024 1. Introduction Connectivity services are provided by networks to customers via dedicated terminating points (e.g., Service Functions (SFs), Customer Premises Equipment (CPEs), Autonomous System Border Routers (ASBRs), data centers gateways, or Internet Exchange Points). A connectivity service is basically about ensuring data transfer received from (or destined to) a given terminating point to (or from) other terminating points that belong to the same customer/service, an interconnection node, or an ancillary node. A set of objectives for the connectivity service may eventually be negotiated and agreed upon between a customer a network provider. For that data transfer to take place within the provider network, it is assumed that adequate setup is provisioned over the links that connect customer terminating points and a provider network (a Provider Edge (PE), typically) so that data can be successfully exchanged over these links. The required setup is referred to in this document as Attachment Circuits (ACs), while the underlying link is referred to as "bearer". This document adheres to the definition of an attachment circuit as provided in Section 1.2 of [RFC4364], especially: Routers can be attached to each other, or to end systems, in a variety of different ways: PPP connections, ATM Virtual Circuits (VCs), Frame Relay VCs, ethernet interfaces, Virtual Local Area Networks (VLANs) on ethernet interfaces, GRE tunnels, Layer 2 Tunneling Protocol (L2TP) tunnels, IPsec tunnels, etc. We will use the term "attachment circuit" to refer generally to some such means of attaching to a router. An attachment circuit may be the sort of connection that is usually thought of as a "data link", or it may be a tunnel of some sort; what matters is that it be possible for two devices to be network layer peers over the attachment circuit. When a customer requests a new value-added service, the service can be bound to existing attachment circuits or trigger the instantiation of new attachment circuits. Whether these attachment circuits are specific to a given service or be shared to deliver a variety of services is deployment-specific. An example of attachment circuits is depicted in Figure 1. A Customer Edge (CE) may be a physical node or a logical entity. A CE is seen by the network as a peer Service Attachment Point (SAP) [RFC9408]. CEs may be dedicated to one single service (e.g., Layer 3 Virtual Private Network (VPN) or Layer 2 VPN) or host multiple services (e.g., Service Functions [RFC7665]). A single AC (as seen by a network provider) may be bound to one or multiple peer SAPs (e.g., "CE1" and "CE2"). For example, and as discussed in [RFC4364], Boucadair, et al. Expires 25 January 2025 [Page 3] Internet-Draft Common Attachment Circuit YANG July 2024 multiple CEs can be attached to a PE over the same attachment circuit. This is typically implemented if the Layer 2 infrastructure between the CE and the network provides a multipoint service. The same CE may terminate multiple ACs. These ACs may be over the same or distinct bearers. .--------------------. .-------. | .--. (b1) .------. | +----. | | +---AC---+ | | CE1 | | | |PE+---AC---+ CE3 | '-------' | .--. '--' (b2) '------' +---AC--+PE| Network | .-------. | '--' .--. (b3) .------. | | | | | +---AC---+ | | CE2 +----' | |PE+---AC---+ CE4 | '-------' | .--. '--' (b3) '---+--' '----------+PE|------' | '--' | | | '-----------AC----------' (bx) = bearer Id x Figure 1: Examples of ACs This document specifies a common module ("ietf-ac-common") for attachment circuits (Section 5). The model is designed with the intent to be reusable by other models and, therefore, ensure consistent AC structures among modules that manipulate ACs. For example, the common model can be reused by service models to expose AC-as-a-Service (ACaaS) (e.g., [I-D.ietf-opsawg-teas-attachment-circuit]), service models that require binding a service to a set of ACs (e.g., Network Slice Service [I-D.ietf-teas-ietf-network-slice-nbi-yang])), network models to provision ACs (e.g., [I-D.ietf-opsawg-ntw-attachment-circuit]), device models, etc. The common AC module eases data inheritance between modules (e.g., from service to network models as per [RFC8969]). The YANG data model in this document conforms to the Network Management Datastore Architecture (NMDA) defined in [RFC8342]. 1.1. Editorial Note (To be removed by RFC Editor) Note to the RFC Editor: This section is to be removed prior to publication. Boucadair, et al. Expires 25 January 2025 [Page 4] Internet-Draft Common Attachment Circuit YANG July 2024 This document contains placeholder values that need to be replaced with finalized values at the time of publication. This note summarizes all of the substitutions that are needed. Please apply the following replacements: * XXXX --> the assigned RFC number for this I-D * 2023-11-13 --> the actual date of the publication of this document 2. Conventions and Definitions The meanings of the symbols in the YANG tree diagrams are defined in [RFC8340]. LxSM refers to both the Layer 2 Service Model (L2SM) [RFC8466] and the Layer 3 Service Model (L3SM) [RFC8299]. LxNM refers to both the Layer 2 Network Model (L2NM) [RFC9291] and the Layer 3 Network Model (L3NM) [RFC9182]. This document uses the following term: Bearer: A physical or logical link that connects a customer node (or site) to a provider network. A bearer can be a wireless or wired link. One or multiple technologies can be used to build a bearer. The bearer type can be specified by a customer. The operator allocates a unique bearer reference to identify a bearer within its network (e.g., customer line identifier). Such a reference can be retrieved by a customer and then used in subsequent service placement requests to unambiguously identify where a service is to be bound. The concept of bearer can be generalized to refer to the required underlying connection for the provisioning of an attachment circuit. One or multiple attachment circuits may be hosted over the same bearer (e.g., multiple Virtual Local Area Networks (VLANs) on the same bearer that is provided by a physical link). The names of data nodes are prefixed using the prefix associated with the corresponding imported YANG module as shown in Table 1: Boucadair, et al. Expires 25 January 2025 [Page 5] Internet-Draft Common Attachment Circuit YANG July 2024 +============+==================+========================+ | Prefix | Module | Reference | +============+==================+========================+ | inet | ietf-inet-types | Section 4 of [RFC6991] | +------------+------------------+------------------------+ | key-chain | ietf-key-chain | [RFC8177] | +------------+------------------+------------------------+ | nacm | ietf-netconf-acm | [RFC8341] | +------------+------------------+------------------------+ | vpn-common | ietf-vpn-common | [RFC9181] | +------------+------------------+------------------------+ | yang | ietf-yang-types | Section 3 of [RFC6991] | +------------+------------------+------------------------+ Table 1: Modules and Their Associated Prefixes 3. Relationship to Other AC Data Models Figure 2 depicts the relationship between the various AC data models: * "ietf-ac-common" (Section 5) * "ietf-bearer-svc" (Section 5.1 of [I-D.ietf-opsawg-teas-attachment-circuit]) * "ietf-ac-svc" (Section 5.2 of [I-D.ietf-opsawg-teas-attachment-circuit]) * "ietf-ac-ntw" ([I-D.ietf-opsawg-ntw-attachment-circuit]) * "ietf-ac-glue" ([I-D.ietf-opsawg-ac-lxsm-lxnm-glue]) ietf-ac-common ^ ^ ^ | | | +----------+ | +----------+ | | | | | | ietf-ac-svc <--> ietf-bearer-svc | ^ ^ | | | | | +------------------------ ietf-ac-ntw | ^ | | | | +----------- ietf-ac-glue -----------+ Figure 2: AC Data Models Boucadair, et al. Expires 25 January 2025 [Page 6] Internet-Draft Common Attachment Circuit YANG July 2024 "ietf-ac-common" is imported by "ietf-bearer-svc", "ietf-ac-svc", and "ietf-ac-ntw". Bearers managed using "ietf-bearer-svc" may be referenced in the service ACs managed using "ietf-ac-svc". Similarly, a bearer managed using "ietf-bearer-svc" may list the set of ACs that use that bearer. In order to ease correlation between an AC service requests and the actual AC provisioned in the network, "ietf-ac-ntw" uses the AC references exposed by "ietf-ac-svc". To bind Layer 2 VPN or Layer 3 VPN services with ACs, "ietf-ac-glue" augments the LxSM and LxNM with AC service references exposed by "ietf-ac-svc" and AC network references exposed by "ietf-ac-ntw". 4. Description of the AC Common YANG Module The full tree diagram of the module can be generated using the "pyang" tool [PYANG] with "-f tree --tree-print-groupings" command- line parameters. That tree is not included here because it is too long (Section 3.3 of [RFC8340]). Instead, subtrees are provided for the reader's convenience. The full tree of the "ietf-ac-common" module is available at [AC-Common-Tree]. 4.1. Features The module defines the following features: 'layer2-ac': Used to indicate support of ACs with Layer 2 properties. 'layer3-ac': Used to indicate support of ACs with Layer 3 properties. 'server-assigned-reference': Used to indicate support of server- generated references to access relevant resources. For example, a bearer request is first created using a name which is assigned by the client, but if this feature is supported, the request will also include a server-generated reference. That reference can be used when requesting the creating of an AC over the existing bearer. 4.2. Identities The module defines a set of identities, including the following: 'address-allocation-type': Used to specify the IP address allocation Boucadair, et al. Expires 25 January 2025 [Page 7] Internet-Draft Common Attachment Circuit YANG July 2024 type in an AC. For example, this identity can used to indicate whether the provider network provides DHCP service, DHCP relay, or static addressing. Note that for the IPv6 case, Stateless Address Autoconfiguration (SLAAC) [RFC4862] can be used. 'local-defined-next-hop': Used to specify next hop actions. For example, this identity can be used to indicate an action to discard traffic for a given destination or treat traffic towards addresses within the specified next-hop prefix as though they are connected to a local link. 'l2-tunnel-type': Uses to control the Layer 2 tunnel selection for an AC. The current version supports indicating pseudowire, Virtual Private LAN Service (VPLS), and Virtual eXtensible Local Area Network (VXLAN). 'precedence-type': Used to indicate the redundancy type when requesting ACs. For example, this identity can be used to tag primary and secondary ACs. 'bgp-capability': Used to indicate a BGP capability [RFC5492]. Examples of BGP capabilities are Multiprotocol extensions for BGP-4 [RFC4760], route refresh [RFC2918], graceful restart [RFC4724], ADD-PATH [RFC7911], or BGP Role [RFC9234]}. 'role': Used to indicate the type of an AC: User-to-Network Interface (UNI), Network-to-Network Interface (NNI), or public NNI. New administrative status types: In addition to the status types already defined in [RFC9181], this document defines: * 'awaiting-validation' to report that a request is pending an adiministrator approval. * 'awaiting-processing' to report that a request was approved and validated, but is awaiting more processing before activation. * 'admin-prohibited' to report that a request cannot be handled because of administrative policies. * 'rejected' to report that a request was rejected reasons not covered by the other status types. 4.3. Reusable Groupings The module also defines a set of reusable groupings, including the following: Boucadair, et al. Expires 25 January 2025 [Page 8] Internet-Draft Common Attachment Circuit YANG July 2024 'op-instructions' (Figure 3): Defines a set of parameters to specify scheduling instructions and report related events for a service request (e.g., AC or bearer). grouping service-status: +-- status +-- admin-status | +-- status? identityref | +--ro last-change? yang:date-and-time +--ro oper-status +--ro status? identityref +--ro last-change? yang:date-and-time grouping op-instructions: +-- requested-start? yang:date-and-time +-- requested-stop? yang:date-and-time +--ro actual-start? yang:date-and-time +--ro actual-stop? yang:date-and-time Figure 3: Operational Instructions Grouping Layer 2 encapsulations (Figure 4): Groupings for the following encapsulation schemes are supported: dot1Q, QinQ, and priority- tagged. Layer 2 tunnel services (Figure 4): These groupings are used to define Layer 2 tunnel services that may be needed for the activation of an AC. Examples of supported Layer 2 services are the pseudowire (Section 6.1 of [RFC8077]), VPLS, or VXLAN [RFC7348]. Boucadair, et al. Expires 25 January 2025 [Page 9] Internet-Draft Common Attachment Circuit YANG July 2024 grouping dot1q: +-- tag-type? identityref +-- cvlan-id? uint16 grouping priority-tagged: +-- tag-type? identityref grouping qinq: +-- tag-type? identityref +-- svlan-id? uint16 +-- cvlan-id? uint16 grouping pseudowire: +-- vcid? uint32 +-- far-end? union grouping vpls: +-- vcid? uint32 +-- far-end* union grouping vxlan: +-- vni-id? uint32 +-- peer-mode? identityref +-- peer-ip-address* inet:ip-address grouping l2-tunnel-service: +-- type? identityref +-- pseudowire | +-- vcid? uint32 | +-- far-end? union +-- vpls | +-- vcid? uint32 | +-- far-end* union +-- vxlan +-- vni-id? uint32 +-- peer-mode? identityref +-- peer-ip-address* inet:ip-address Figure 4: Layer 2 Connection Groupings Layer 3 address allocation (Figure 5): Defines both IPv4 and IPv6 groupings to specify IP address allocation over an AC. Both dynamic and static address schemes are supported. IP connections (Figure 5):: Defines IPv4 and IPv6 groupings for managing Layer 3 connectivity over an AC. Both basic and more elaborated IP connection groupings are supported. grouping ipv4-allocation-type: +-- prefix-length? uint8 +-- address-allocation-type? identityref grouping ipv6-allocation-type: +-- prefix-length? uint8 +-- address-allocation-type? identityref Boucadair, et al. Expires 25 January 2025 [Page 10] Internet-Draft Common Attachment Circuit YANG July 2024 grouping ipv4-connection-basic: +-- prefix-length? uint8 +-- address-allocation-type? identityref +-- (allocation-type)? +--:(dynamic) +-- (provider-dhcp)? | +--:(dhcp-service-type) | +-- dhcp-service-type? enumeration +-- (dhcp-relay)? +--:(customer-dhcp-servers) +-- customer-dhcp-servers +-- server-ip-address* inet:ipv4-address grouping ipv6-connection-basic: +-- prefix-length? uint8 +-- address-allocation-type? identityref +-- (allocation-type)? +--:(dynamic) +-- (provider-dhcp)? | +--:(dhcp-service-type) | +-- dhcp-service-type? enumeration +-- (dhcp-relay)? +--:(customer-dhcp-servers) +-- customer-dhcp-servers +-- server-ip-address* inet:ipv6-address grouping ipv4-connection: +-- local-address? inet:ipv4-address +-- virtual-address? inet:ipv4-address +-- prefix-length? uint8 +-- address-allocation-type? identityref +-- (allocation-type)? +--:(dynamic) | +-- (address-assign)? | | +--:(number) | | | +-- number-of-dynamic-address? uint16 | | +--:(explicit) | | +-- customer-addresses | | +-- address-pool* [pool-id] | | +-- pool-id string | | +-- start-address inet:ipv4-address | | +-- end-address? inet:ipv4-address | +-- (provider-dhcp)? | | +--:(dhcp-service-type) | | +-- dhcp-service-type? enumeration | +-- (dhcp-relay)? | +--:(customer-dhcp-servers) | +-- customer-dhcp-servers | +-- server-ip-address* inet:ipv4-address +--:(static-addresses) Boucadair, et al. Expires 25 January 2025 [Page 11] Internet-Draft Common Attachment Circuit YANG July 2024 +-- address* [address-id] +-- address-id string +-- customer-address? inet:ipv4-address grouping ipv6-connection: +-- local-address? inet:ipv6-address +-- virtual-address? inet:ipv6-address +-- prefix-length? uint8 +-- address-allocation-type? identityref +-- (allocation-type)? +--:(dynamic) | +-- (address-assign)? | | +--:(number) | | | +-- number-of-dynamic-address? uint16 | | +--:(explicit) | | +-- customer-addresses | | +-- address-pool* [pool-id] | | +-- pool-id string | | +-- start-address inet:ipv6-address | | +-- end-address? inet:ipv6-address | +-- (provider-dhcp)? | | +--:(dhcp-service-type) | | +-- dhcp-service-type? enumeration | +-- (dhcp-relay)? | +--:(customer-dhcp-servers) | +-- customer-dhcp-servers | +-- server-ip-address* inet:ipv6-address +--:(static-addresses) +-- address* [address-id] +-- address-id string +-- customer-address? inet:ipv6-address Figure 5: Layer 3 Connection Groupings Routing parameters & OAM (Figure 6): In addition to static routing, the module supports the following routing protocols: BGP [RFC4271], OSPF [RFC4577] or [RFC6565], IS-IS [ISO10589][RFC1195][RFC5308], and RIP [RFC2453]. For all supported routing protocols, 'address-family' indicates whether IPv4, IPv6, or both address families are to be activated. For example, this parameter is used to determine whether RIPv2 [RFC2453], RIP Next Generation (RIPng), or both are to be enabled [RFC2080]. More details about supported routing groupings are provided hereafter: * Authentication: These groupings include the required information to manage the authentication of OSPF, IS-IS, BGP, and RIP. Similar to [RFC9182], this version of the common AC model assumes that parameters specific to the TCP-AO are Boucadair, et al. Expires 25 January 2025 [Page 12] Internet-Draft Common Attachment Circuit YANG July 2024 preconfigured as part of the key chain that is referenced in the model. No assumption is made about how such a key chain is preconfigured. However, the structure of the key chain should cover data nodes beyond those in [RFC8177], mainly SendID and RecvID (Section 3.1 of [RFC5925]). * BGP peer groups: Includes a set of parameters to identify a BGP peer group. Such a group can be defined by providing a local AS Number (ASN), a customer's ASN, and the address families to be activated for this group. BGP peer groups can be identified by a name. * Basic parameters: These groupings include the minimal set of routing configuration that is required for the activation of OSPF, IS-IS, BGP, and RIP. * Static routing: Parameters to configure an entry of a list of IP static routing entries. The 'redundancy-group' grouping lists the groups to which an AC belongs [RFC9181]. For example, the 'group-id' is used to associate redundancy or protection constraints of ACs. grouping bgp-authentication: +-- authentication +-- enabled? boolean +-- keying-material +-- (option)? +--:(ao) | +-- enable-ao? boolean | +-- ao-keychain? key-chain:key-chain-ref +--:(md5) | +-- md5-keychain? key-chain:key-chain-ref +--:(explicit) +-- key-id? uint32 +-- key? string +-- crypto-algorithm? identityref grouping ospf-authentication: +-- authentication +-- enabled? boolean +-- keying-material +-- (option)? +--:(auth-key-chain) | +-- key-chain? key-chain:key-chain-ref +--:(auth-key-explicit) +-- key-id? uint32 +-- key? string +-- crypto-algorithm? identityref Boucadair, et al. Expires 25 January 2025 [Page 13] Internet-Draft Common Attachment Circuit YANG July 2024 grouping isis-authentication: +-- authentication +-- enabled? boolean +-- keying-material +-- (option)? +--:(auth-key-chain) | +-- key-chain? key-chain:key-chain-ref +--:(auth-key-explicit) +-- key-id? uint32 +-- key? string +-- crypto-algorithm? identityref grouping rip-authentication: +-- authentication +-- enabled? boolean +-- keying-material +-- (option)? +--:(auth-key-chain) | +-- key-chain? key-chain:key-chain-ref +--:(auth-key-explicit) +-- key? string +-- crypto-algorithm? identityref grouping bgp-peer-group-without-name: +-- local-as? inet:as-number +-- peer-as? inet:as-number +-- address-family? identityref +-- role? identityref grouping bgp-peer-group-with-name: +-- name? string +-- local-as? inet:as-number +-- peer-as? inet:as-number +-- address-family? identityref +-- role? identityref grouping ospf-basic: +-- address-family? identityref +-- area-id yang:dotted-quad +-- metric? uint16 grouping isis-basic: +-- address-family? identityref +-- area-address area-address grouping ipv4-static-rtg-entry: +-- lan? inet:ipv4-prefix +-- lan-tag? string +-- next-hop? union +-- metric? uint32 grouping ipv4-static-rtg: +-- ipv4-lan-prefixes* [lan next-hop] {vpn-common:ipv4}? +-- lan inet:ipv4-prefix +-- lan-tag? string Boucadair, et al. Expires 25 January 2025 [Page 14] Internet-Draft Common Attachment Circuit YANG July 2024 +-- next-hop union +-- metric? uint32 +-- status +-- admin-status | +-- status? identityref | +--ro last-change? yang:date-and-time +--ro oper-status +--ro status? identityref +--ro last-change? yang:date-and-time grouping ipv6-static-rtg-entry: +-- lan? inet:ipv6-prefix +-- lan-tag? string +-- next-hop? union +-- metric? uint32 grouping ipv6-static-rtg: +-- ipv6-lan-prefixes* [lan next-hop] {vpn-common:ipv6}? +-- lan inet:ipv6-prefix +-- lan-tag? string +-- next-hop union +-- metric? uint32 +-- status +-- admin-status | +-- status? identityref | +--ro last-change? yang:date-and-time +--ro oper-status +--ro status? identityref +--ro last-change? yang:date-and-time grouping bfd: +-- holdtime? uint32 grouping redundancy-group: +-- group* [group-id] +-- group-id? string +-- precedence? identityref Figure 6: Layer 3 Connection Groupings Bandwidth parameters (Figure 7): Bandwidth parameters can be represented using the Committed Information Rate (CIR), the Excess Information Rate (EIR), or the Peak Information Rate (PIR). These parameters can be provided per bandwidth type. Type values are taken from [RFC9181], e.g.,: * 'bw-per-cos': The bandwidth is per Class of Service (CoS). * 'bw-per-site': The bandwidth is to all ACs that belong to the same site. Boucadair, et al. Expires 25 January 2025 [Page 15] Internet-Draft Common Attachment Circuit YANG July 2024 grouping bandwidth-parameters: +-- cir? uint64 +-- cbs? uint64 +-- eir? uint64 +-- ebs? uint64 +-- pir? uint64 +-- pbs? uint64 grouping bandwidth-per-type: +-- bandwidth* [bw-type] +-- bw-type identityref +-- (type)? +--:(per-cos) | +-- cos* [cos-id] | +-- cos-id uint8 | +-- cir? uint64 | +-- cbs? uint64 | +-- eir? uint64 | +-- ebs? uint64 | +-- pir? uint64 | +-- pbs? uint64 +--:(other) +-- cir? uint64 +-- cbs? uint64 +-- eir? uint64 +-- ebs? uint64 +-- pir? uint64 +-- pbs? uint64 Figure 7: Bandwidth Groupings 5. Common Attachment Circuit YANG Module This module uses types defined in [RFC6991], [RFC8177], and [RFC9181]. <CODE BEGINS> file "ietf-ac-common@2023-11-13.yang" module ietf-ac-common { yang-version 1.1; namespace "urn:ietf:params:xml:ns:yang:ietf-ac-common"; prefix ac-common; import ietf-vpn-common { prefix vpn-common; reference "RFC 9181: A Common YANG Data Model for Layer 2 and Layer 3 VPNs"; } import ietf-netconf-acm { Boucadair, et al. Expires 25 January 2025 [Page 16] Internet-Draft Common Attachment Circuit YANG July 2024 prefix nacm; reference "RFC 8341: Network Configuration Access Control Model"; } import ietf-inet-types { prefix inet; reference "RFC 6991: Common YANG Data Types, Section 4"; } import ietf-yang-types { prefix yang; reference "RFC 6991: Common YANG Data Types, Section 3"; } import ietf-key-chain { prefix key-chain; reference "RFC 8177: YANG Data Model for Key Chains"; } organization "IETF OPSAWG (Operations and Management Area Working Group)"; contact "WG Web: <https://datatracker.ietf.org/wg/opsawg/> WG List: <mailto:opsawg@ietf.org> Editor: Mohamed Boucadair <mailto:mohamed.boucadair@orange.com> Author: Richard Roberts <mailto:rroberts@juniper.net> Author: Oscar Gonzalez de Dios <mailto:oscar.gonzalezdedios@telefonica.com> Author: Samier Barguil <mailto:ssamier.barguil_giraldo@nokia.com> Author: Bo Wu <mailto:lana.wubo@huawei.com>"; description "This YANG module defines a common attachment circuit (AC) YANG model. Copyright (c) 2024 IETF Trust and the persons identified as authors of the code. All rights reserved. Redistribution and use in source and binary forms, with or without modification, is permitted pursuant to, and subject to the license terms contained in, the Revised BSD License set forth in Section 4.c of the IETF Trust's Legal Provisions Relating to IETF Documents Boucadair, et al. Expires 25 January 2025 [Page 17] Internet-Draft Common Attachment Circuit YANG July 2024 (https://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 2023-11-13 { description "Initial revision."; reference "RFC XXXX: A Common YANG Data Model for Attachment Circuits"; } /****************************Features************************/ feature layer2-ac { description "Indicates support of Layer 2 ACs."; } feature layer3-ac { description "Indicates support of Layer 3 ACs."; } feature server-assigned-reference { description "This feature indicates support for server-generated references and use of such references to access related resources."; } /****************************Identities************************/ // IP address allocation types identity address-allocation-type { description "Base identity for address allocation type in the AC."; } identity provider-dhcp { base address-allocation-type; description "The provider's network provides a DHCP service to the customer."; } identity provider-dhcp-relay { base address-allocation-type; description Boucadair, et al. Expires 25 January 2025 [Page 18] Internet-Draft Common Attachment Circuit YANG July 2024 "The provider's network provides a DHCP relay service to the customer."; } identity provider-dhcp-slaac { if-feature "vpn-common:ipv6"; base address-allocation-type; description "The provider's network provides a DHCP service to the customer as well as IPv6 Stateless Address Autoconfiguration (SLAAC)."; reference "RFC 4862: IPv6 Stateless Address Autoconfiguration"; } identity static-address { base address-allocation-type; description "The provider's network provides static IP addressing to the customer."; } identity slaac { if-feature "vpn-common:ipv6"; base address-allocation-type; description "The provider's network uses IPv6 SLAAC to provide addressing to the customer."; reference "RFC 4862: IPv6 Stateless Address Autoconfiguration"; } identity dynamic-infra { base address-allocation-type; description "The IP address is dynamically allocated by the hosting infrastrcture."; } // next-hop actions identity local-defined-next-hop { description "Base identity of local defined next hops."; } identity discard { base local-defined-next-hop; description Boucadair, et al. Expires 25 January 2025 [Page 19] Internet-Draft Common Attachment Circuit YANG July 2024 "Indicates an action to discard traffic for the corresponding destination. For example, this can be used to black-hole traffic."; } identity local-link { base local-defined-next-hop; description "Treat traffic towards addresses within the specified next-hop prefix as though they are connected to a local link."; } // Layer 2 tunnel types identity l2-tunnel-type { description "Base identity for Layer 2 tunnel selection for an AC."; } identity pseudowire { base l2-tunnel-type; description "Pseudowire tunnel termination for the AC."; } identity vpls { base l2-tunnel-type; description "Virtual Private LAN Service (VPLS) tunnel termination for the AC."; } identity vxlan { base l2-tunnel-type; description "Virtual eXtensible Local Area Network (VXLAN) tunnel termination for the AC."; } // Tagging precedence identity precedence-type { description "Redundancy type. The service can be created with primary and secondary tagging."; } identity primary { Boucadair, et al. Expires 25 January 2025 [Page 20] Internet-Draft Common Attachment Circuit YANG July 2024 base precedence-type; description "Identifies the main attachment circuit."; } identity secondary { base precedence-type; description "Identifies the secondary attachment circuit."; } /* BGP Capability Identities. */ identity bgp-capability { description "Base identity for a BGP capability."; reference "RFC 5492: Capabilities Advertisement with BGP-4"; } identity mp-bgp { base bgp-capability; description "Multi-protocol extensions to BGP."; reference "RFC 4760: Multiprotocol Extentions for BGP-4"; } identity route-refresh { base bgp-capability; description "Route refresh capability."; reference "RFC 2918: Route Refresh Capability for BGP-4."; } identity graceful-restart { base bgp-capability; description "Graceful restart capability."; reference "RFC 4724: Graceful Restart Mechanism for BGP"; } identity add-paths { base bgp-capability; description "A capability that allows the advertisement of multiple Boucadair, et al. Expires 25 January 2025 [Page 21] Internet-Draft Common Attachment Circuit YANG July 2024 paths for the same address prefix without the new paths implicitly replacing any previous ones."; reference "RFC 7911: Advertisement of Multiple Paths in BGP"; } identity ebgp-role { base bgp-capability; description "A capability that allows the advertisement of the BGP role when establising a session."; reference "RFC 9234: Route Leak Prevention and Detection Using Roles in UPDATE and OPEN Messages, Section 4.1"; } // AC Type identity role { description "Base identity for the network role of an AC."; } identity uni { base role; description "User-to-Network Interface (UNI)."; } identity nni { base role; description "Network-to-Network Interface (NNI)."; } identity public-nni { base role; description "Public peering."; } // More Admin status types identity awaiting-validation { base vpn-common:administrative-status; description "This administrative status reflects that a request is pending an adiministrator approval."; Boucadair, et al. Expires 25 January 2025 [Page 22] Internet-Draft Common Attachment Circuit YANG July 2024 } identity awaiting-processing { base vpn-common:administrative-status; description "This administrative status reflects that a request was approved and validated, but is awaiting more processing before activation."; } identity admin-prohibited { base vpn-common:administrative-status; description "This administrative status reflects that a request cannot be handled because of administrative policies."; } identity rejected { base vpn-common:administrative-status; description "This administrative status reflects that a request was rejected because, e.g., there are no sufficient resources or other reasons not covered by the other status types."; } identity bgp-role { description "Used to indicate BGP role when establishing a BGP session."; reference "RFC 9234: Route Leak Prevention and Detection Using Roles in UPDATE and OPEN Messages, Section 4"; } identity provider { base bgp-role; description "The local AS is a transit provider of the remote AS."; } identity client { base bgp-role; description "The local AS is a transit provider of the remote AS."; } identity rs { base bgp-role; description Boucadair, et al. Expires 25 January 2025 [Page 23] Internet-Draft Common Attachment Circuit YANG July 2024 "The local AS is a Route Server (RS)."; } identity rs-client { base bgp-role; description "The local AS is a client of an RS and the RS is the remote AS."; } identity peer { base bgp-role; description "The local and remote ASes have a peering relationship."; } /****************************Typedefs************************/ typedef predefined-next-hop { type identityref { base local-defined-next-hop; } description "Predefined next-hop designation for locally generated routes."; } typedef area-address { type string { pattern '[0-9A-Fa-f]{2}(\.[0-9A-Fa-f]{4}){0,6}'; } description "This type defines the area address format."; } /************************Reusable groupings********************/ /**** Service Status ****/ grouping service-status { description "Service status grouping."; container status { description "Service status."; container admin-status { description "Administrative service status."; leaf status { Boucadair, et al. Expires 25 January 2025 [Page 24] Internet-Draft Common Attachment Circuit YANG July 2024 type identityref { base vpn-common:administrative-status; } description "Administrative service status."; } leaf last-change { type yang:date-and-time; config false; description "Indicates the actual date and time of the service status change."; } } container oper-status { config false; description "Operational service status."; uses vpn-common:oper-status-timestamp; } } } /**** A set of profiles ****/ grouping ac-profile-cfg { description "Grouping for AC profile configuration."; container valid-provider-identifiers { description "Container for valid provider profile identifiers. The profiles only have significance within the service provider's administrative domain."; list encryption-profile-identifier { key "id"; description "List of encryption profile identifiers."; leaf id { type string; description "Identification of the encryption profile to be used."; } } list qos-profile-identifier { key "id"; description "List of QoS profile identifiers."; Boucadair, et al. Expires 25 January 2025 [Page 25] Internet-Draft Common Attachment Circuit YANG July 2024 leaf id { type string; description "Identification of the QoS profile to be used."; } } list failure-detection-profile-identifier { key "id"; description "List of BFD profile identifiers."; leaf id { type string; description "Identification of the a failure detection (e.g., BFD) profile to be used."; } } list forwarding-profile-identifier { key "id"; description "List of forwarding profile identifiers."; leaf id { type string; description "Identification of the forwarding profile to be used."; } } list routing-profile-identifier { key "id"; description "List of routing profile identifiers."; leaf id { type string; description "Identification of the routing profile to be used by the routing protocols over an AC."; } } nacm:default-deny-write; } } /**** Operational instructions ****/ grouping op-instructions { description "Scheduling instructions."; leaf requested-start { Boucadair, et al. Expires 25 January 2025 [Page 26] Internet-Draft Common Attachment Circuit YANG July 2024 type yang:date-and-time; description "Indicates the requested date and time when the service is expected to be active."; } leaf requested-stop { type yang:date-and-time; description "Indicates the requested date and time when the service is expected to be disabled."; } leaf actual-start { type yang:date-and-time; config false; description "Indicates the actual date and time when the service actually was enabled."; } leaf actual-stop { type yang:date-and-time; config false; description "Indicates the actual date and time when the service actually was disabled."; } } /**** Layer 2 encapsulations ****/ // Dot1q grouping dot1q { description "Defines a grouping for tagged interfaces."; leaf tag-type { type identityref { base vpn-common:tag-type; } description "Tag type."; } leaf cvlan-id { type uint16 { range "1..4094"; } description "VLAN identifier."; } } Boucadair, et al. Expires 25 January 2025 [Page 27] Internet-Draft Common Attachment Circuit YANG July 2024 // priority-tagged grouping priority-tagged { description "Priority tagged."; leaf tag-type { type identityref { base vpn-common:tag-type; } description "Tag type."; } } // QinQ grouping qinq { description "Includes QinQ parameters."; leaf tag-type { type identityref { base vpn-common:tag-type; } description "Tag type."; } leaf svlan-id { type uint16 { range "1..4094"; } description "Service VLAN (S-VLAN) identifier."; } leaf cvlan-id { type uint16 { range "1..4094"; } description "Customer VLAN (C-VLAN) identifier."; } } /**** Layer 2 tunnel services ****/ // pseudowire (PW) grouping pseudowire { description "Includes pseudowire termination parameters."; Boucadair, et al. Expires 25 January 2025 [Page 28] Internet-Draft Common Attachment Circuit YANG July 2024 leaf vcid { type uint32; description "Indicates a PW or virtual circuit (VC) identifier."; } leaf far-end { type union { type uint32; type inet:ip-address; } description "Neighbor reference."; reference "RFC 8077: Pseudowire Setup and Maintenance Using the Label Distribution Protocol (LDP), Section 6.1"; } } // VPLS grouping vpls { description "VPLS termination parameters."; leaf vcid { type uint32; description "VC identifier."; } leaf-list far-end { type union { type uint32; type inet:ip-address; } description "Neighbor reference."; } } // VXLAN grouping vxlan { description "VXLAN termination parameters."; leaf vni-id { type uint32; description "VXLAN Network Identifier (VNI)."; } Boucadair, et al. Expires 25 January 2025 [Page 29] Internet-Draft Common Attachment Circuit YANG July 2024 leaf peer-mode { type identityref { base vpn-common:vxlan-peer-mode; } description "Specifies the VXLAN access mode. By default, the peer mode is set to 'static-mode'."; } leaf-list peer-ip-address { type inet:ip-address; description "List of a peer's IP addresses."; } } // Layer 2 Tunnel service grouping l2-tunnel-service { description "Defines a Layer 2 tunnel termination."; leaf type { type identityref { base l2-tunnel-type; } description "Selects the tunnel termination type for an AC."; } container pseudowire { when "derived-from-or-self(../type, 'ac-common:pseudowire')" { description "Only applies when the Layer 2 service type is 'pseudowire'."; } description "Includes pseudowire termination parameters."; uses pseudowire; } container vpls { when "derived-from-or-self(../type, 'ac-common:vpls')" { description "Only applies when the Layer 2 service type is 'vpls'."; } description "VPLS termination parameters."; uses vpls; } container vxlan { when "derived-from-or-self(../type, 'ac-common:vxlan')" { Boucadair, et al. Expires 25 January 2025 [Page 30] Internet-Draft Common Attachment Circuit YANG July 2024 description "Only applies when the Layer 2 service type is 'vxlan'."; } description "VXLAN termination parameters."; uses vxlan; } } /**** Layer 3 connection *****/ // IPv4 allocation type grouping ipv4-allocation-type { description "IPv4-specific parameters."; leaf prefix-length { type uint8 { range "0..32"; } description "Subnet prefix length expressed in bits. It is applied to both local and customer addresses."; } leaf address-allocation-type { type identityref { base address-allocation-type; } must "not(derived-from-or-self(current(), 'ac-common:slaac') " + "or derived-from-or-self(current(), " + "'ac-common:provider-dhcp-slaac'))" { error-message "SLAAC is only applicable to IPv6."; } description "Defines how IPv4 addresses are allocated to the peer site."; } } // IPv6 allocation type grouping ipv6-allocation-type { description "IPv6-specific parameters."; leaf prefix-length { type uint8 { range "0..128"; } description "Subnet prefix length expressed in bits. It is applied to Boucadair, et al. Expires 25 January 2025 [Page 31] Internet-Draft Common Attachment Circuit YANG July 2024 both local and customer addresses."; } leaf address-allocation-type { type identityref { base address-allocation-type; } description "Defines how IPv6 addresses are allocated to the peer site."; } } // Basic parameters for IPv4 connection grouping ipv4-connection-basic { description "Basic set fof IPv4-specific parameters for the connection."; uses ipv4-allocation-type; choice allocation-type { description "Choice of the IPv4 address allocation."; case dynamic { description "When the addresses are allocated by DHCP or other dynamic means local to the infrastructure."; choice provider-dhcp { description "Parameters related to DHCP-allocated addresses. IP addresses are allocated by DHCP, that is provided by the operator."; leaf dhcp-service-type { type enumeration { enum server { description "Local DHCP server."; } enum relay { description "Local DHCP relay. DHCP requests are relayed to a provider's server."; } } description "Indicates the type of DHCP service to be enabled on an AC."; } } choice dhcp-relay { description Boucadair, et al. Expires 25 January 2025 [Page 32] Internet-Draft Common Attachment Circuit YANG July 2024 "The DHCP relay is provided by the operator."; container customer-dhcp-servers { description "Container for a list of the customer's DHCP servers."; leaf-list server-ip-address { type inet:ipv4-address; description "IPv4 addresses of the customer's DHCP server."; } } } } } } // Basic parameters for IPv6 connection grouping ipv6-connection-basic { description "Basic set fof IPv6-specific parameters for the connection."; uses ipv6-allocation-type; choice allocation-type { description "Choice of the IPv6 address allocation."; case dynamic { description "When the addresses are allocated by DHCP or other dynamic means local to the infrastructure."; choice provider-dhcp { description "Parameters related to DHCP-allocated addresses. IP addresses are allocated by DHCP, that is provided by the operator."; leaf dhcp-service-type { type enumeration { enum server { description "Local DHCP server."; } enum relay { description "Local DHCP relay. DHCP requests are relayed to a provider's server."; } } description "Indicates the type of DHCP service to be enabled on the AC."; Boucadair, et al. Expires 25 January 2025 [Page 33] Internet-Draft Common Attachment Circuit YANG July 2024 } } choice dhcp-relay { description "The DHCP relay is provided by the operator."; container customer-dhcp-servers { description "Container for a list of the customer's DHCP servers."; leaf-list server-ip-address { type inet:ipv6-address; description "IPv6 addresses of the customer's DHCP server."; } } } } } } // Full parameters for the IPv4 connection grouping ipv4-connection { description "IPv4-specific parameters."; leaf local-address { type inet:ipv4-address; description "The IP address used at the provider's interface."; } leaf virtual-address { type inet:ipv4-address; description "This addresss may be used for redundancy purposes."; } uses ipv4-allocation-type; choice allocation-type { description "Choice of the IPv4 address allocation."; case dynamic { description "When the addresses are allocated by DHCP or other dynamic means local to the infrastructure."; choice address-assign { description "A choice for how IPv4 addresses are assigned."; case number { leaf number-of-dynamic-address { type uint16; Boucadair, et al. Expires 25 January 2025 [Page 34] Internet-Draft Common Attachment Circuit YANG July 2024 description "Specifies the number of IP addresses to be assigned to the customer on the AC."; } } case explicit { container customer-addresses { description "Container for customer addresses to be allocated using DHCP."; list address-pool { key "pool-id"; description "Describes IP addresses to be dyncamically allocated. When only 'start-address' is present, it represents a single address. When both 'start-address' and 'end-address' are specified, it implies a range inclusive of both addresses."; leaf pool-id { type string; description "A pool identifier for the address range from 'start-address' to 'end-address'."; } leaf start-address { type inet:ipv4-address; mandatory true; description "Indicates the first address in the pool."; } leaf end-address { type inet:ipv4-address; description "Indicates the last address in the pool."; } } } } } choice provider-dhcp { description "Parameters related to DHCP-allocated addresses. IP addresses are allocated by DHCP, which is provided by the operator."; Boucadair, et al. Expires 25 January 2025 [Page 35] Internet-Draft Common Attachment Circuit YANG July 2024 leaf dhcp-service-type { type enumeration { enum server { description "Local DHCP server."; } enum relay { description "Local DHCP relay. DHCP requests are relayed to a provider's server."; } } description "Indicates the type of DHCP service to be enabled on this AC."; } } choice dhcp-relay { description "The DHCP relay is provided by the operator."; container customer-dhcp-servers { description "Container for a list of the customer's DHCP servers."; leaf-list server-ip-address { type inet:ipv4-address; description "IPv4 addresses of the customer's DHCP server."; } } } } case static-addresses { description "Lists the IPv4 addresses that are used."; list address { key "address-id"; ordered-by user; description "Lists the IPv4 addresses that are used. The first address of the list is the primary address of the connection."; leaf address-id { type string; description "An identifier of the static IPv4 address."; } leaf customer-address { type inet:ipv4-address; Boucadair, et al. Expires 25 January 2025 [Page 36] Internet-Draft Common Attachment Circuit YANG July 2024 description "An IPv4 address of the customer side."; } } } } } // Full parameters for the IPv6 connection grouping ipv6-connection { description "IPv6-specific parameters."; leaf local-address { type inet:ipv6-address; description "IPv6 address of the provider side."; } leaf virtual-address { type inet:ipv6-address; description "This addresss may be used for redundancy purposes."; } uses ipv6-allocation-type; choice allocation-type { description "Choice of the IPv6 address allocation."; case dynamic { description "When the addresses are allocated by DHCP or other dynamic means local to the infrastructure."; choice address-assign { description "A choice for how IPv6 addresses are assigned."; case number { leaf number-of-dynamic-address { type uint16; description "Specifies the number of IP addresses to be assigned to the customer on this access."; } } case explicit { container customer-addresses { description "Container for customer addresses to be allocated using DHCP."; list address-pool { Boucadair, et al. Expires 25 January 2025 [Page 37] Internet-Draft Common Attachment Circuit YANG July 2024 key "pool-id"; description "Describes IP addresses to be dyncamically allocated. When only 'start-address' is present, it represents a single address. When both 'start-address' and 'end-address' are specified, it implies a range inclusive of both addresses."; leaf pool-id { type string; description "A pool identifier for the address range from 'start-address' to 'end-address'."; } leaf start-address { type inet:ipv6-address; mandatory true; description "Indicates the first address in the pool."; } leaf end-address { type inet:ipv6-address; description "Indicates the last address in the pool."; } } } } } choice provider-dhcp { description "Parameters related to DHCP-allocated addresses. IP addresses are allocated by DHCP, which is provided by the operator."; leaf dhcp-service-type { type enumeration { enum server { description "Local DHCP server."; } enum relay { description "Local DHCP relay. DHCP requests are relayed to a provider's server."; } Boucadair, et al. Expires 25 January 2025 [Page 38] Internet-Draft Common Attachment Circuit YANG July 2024 } description "Indicates the type of DHCP service to be enabled on this access."; } } choice dhcp-relay { description "The DHCP relay is provided by the operator."; container customer-dhcp-servers { description "Container for a list of the customer's DHCP servers."; leaf-list server-ip-address { type inet:ipv6-address; description "IPv6 addresses of the customer's DHCP server."; } } } } case static-addresses { description "Lists the IPv6 addresses that are used."; list address { key "address-id"; ordered-by user; description "Lists the IPv6 addresses that are used. The first address of the list is the primary IP address of the connection."; leaf address-id { type string; description "An identifier of the static IPv6 address."; } leaf customer-address { type inet:ipv6-address; description "An IPv6 address of the customer side."; } } } } } /**** Routing ****/ // Routing authentication Boucadair, et al. Expires 25 January 2025 [Page 39] Internet-Draft Common Attachment Circuit YANG July 2024 grouping bgp-authentication { description "Grouping for BGP authentication parameters."; container authentication { description "Container for BGP authentication parameters."; leaf enabled { type boolean; description "Enables or disables authentication."; } container keying-material { when "../enabled = 'true'"; description "Container for describing how a BGP routing session is to be secured on an AC."; choice option { description "Choice of authentication options."; case ao { description "Uses the TCP Authentication Option (TCP-AO)."; reference "RFC 5925: The TCP Authentication Option"; leaf enable-ao { type boolean; description "Enables the TCP-AO."; } leaf ao-keychain { type key-chain:key-chain-ref; description "Reference to the TCP-AO key chain."; reference "RFC 8177: YANG Data Model for Key Chains"; } } case md5 { description "Uses MD5 to secure the session."; reference "RFC 4364: BGP/MPLS IP Virtual Private Networks (VPNs), Section 13.2"; leaf md5-keychain { type key-chain:key-chain-ref; description "Reference to the MD5 key chain."; reference Boucadair, et al. Expires 25 January 2025 [Page 40] Internet-Draft Common Attachment Circuit YANG July 2024 "RFC 8177: YANG Data Model for Key Chains"; } } case explicit { leaf key-id { type uint32; description "Key identifier."; } leaf key { type string; description "BGP authentication key. This model only supports the subset of keys that are representable as ASCII strings."; } leaf crypto-algorithm { type identityref { base key-chain:crypto-algorithm; } description "Indicates the cryptographic algorithm associated with the key."; } } } } } } grouping ospf-authentication { description "Authentication configuration."; container authentication { description "Container for OSPF authentication parameters."; leaf enabled { type boolean; description "Enables or disables authentication."; } container keying-material { when "../enabled = 'true'"; description "Container for describing how an OSPF session is to be secured for this AC."; choice option { Boucadair, et al. Expires 25 January 2025 [Page 41] Internet-Draft Common Attachment Circuit YANG July 2024 description "Options for OSPF authentication."; case auth-key-chain { leaf key-chain { type key-chain:key-chain-ref; description "Name of the key chain."; } } case auth-key-explicit { leaf key-id { type uint32; description "Key identifier."; } leaf key { type string; description "OSPF authentication key. This model only supports the subset of keys that are representable as ASCII strings."; } leaf crypto-algorithm { type identityref { base key-chain:crypto-algorithm; } description "Indicates the cryptographic algorithm associated with the key."; } } } } } } grouping isis-authentication { description "IS-IS authentication configuration."; container authentication { description "Container for IS-IS authentication parameters."; leaf enabled { type boolean; description "Enables or disables authentication."; } Boucadair, et al. Expires 25 January 2025 [Page 42] Internet-Draft Common Attachment Circuit YANG July 2024 container keying-material { when "../enabled = 'true'"; description "Container for describing how an IS-IS session is secured over an AC."; choice option { description "Options for IS-IS authentication."; case auth-key-chain { leaf key-chain { type key-chain:key-chain-ref; description "Name of the key chain."; } } case auth-key-explicit { leaf key-id { type uint32; description "Key identifier."; } leaf key { type string; description "IS-IS authentication key. This model only supports the subset of keys that are representable as ASCII strings."; } leaf crypto-algorithm { type identityref { base key-chain:crypto-algorithm; } description "Indicates the cryptographic algorithm associated with the key."; } } } } } } grouping rip-authentication { description "RIP authentication configuration."; container authentication { description Boucadair, et al. Expires 25 January 2025 [Page 43] Internet-Draft Common Attachment Circuit YANG July 2024 "Container for RIP authentication parameters."; leaf enabled { type boolean; description "Enables or disables authentication."; } container keying-material { when "../enabled = 'true'"; description "Container for describing how a RIP session is to be secured on this AC."; choice option { description "Specifies the authentication scheme."; case auth-key-chain { leaf key-chain { type key-chain:key-chain-ref; description "Name of the key chain."; } } case auth-key-explicit { leaf key { type string; description "RIP authentication key. This model only supports the subset of keys that are representable as ASCII strings."; } leaf crypto-algorithm { type identityref { base key-chain:crypto-algorithm; } description "Indicates the cryptographic algorithm associated with the key."; } } } } } } // Basic routing parameters grouping bgp-peer-group-without-name { Boucadair, et al. Expires 25 January 2025 [Page 44] Internet-Draft Common Attachment Circuit YANG July 2024 description "Identifies a BGP peer-group configured on the local system."; leaf local-as { type inet:as-number; description "Indicates a local AS Number (ASN). This ASN is exposed to a customer so that it knows which ASN to use to set up a BGP session."; } leaf peer-as { type inet:as-number; description "Indicates the customer's ASN when the customer requests BGP routing."; } leaf address-family { type identityref { base vpn-common:address-family; } description "This node contains the address families to be activated. 'dual-stack' means that both IPv4 and IPv6 will be activated."; } leaf role { type identityref { base ac-common:bgp-role; } description "Specifies the BGP role (provider, customer, peer, etc.)."; reference "RFC 9234: Route Leak Prevention and Detection Using Roles in UPDATE and OPEN Messages, Section 4"; } } grouping bgp-peer-group-with-name { description "Identifies a BGP peer-group configured on the local system - identified by a peer-group name."; leaf name { type string; description "Name of the BGP peer-group."; } uses bgp-peer-group-without-name; } Boucadair, et al. Expires 25 January 2025 [Page 45] Internet-Draft Common Attachment Circuit YANG July 2024 grouping ospf-basic { description "Configuration specific to OSPF."; leaf address-family { type identityref { base vpn-common:address-family; } description "Indicates whether IPv4, IPv6, or both are to be activated."; } leaf area-id { type yang:dotted-quad; mandatory true; description "Area ID."; reference "RFC 4577: OSPF as the Provider/Customer Edge Protocol for BGP/MPLS IP Virtual Private Networks (VPNs), Section 4.2.3 RFC 6565: OSPFv3 as a Provider Edge to Customer Edge (PE-CE) Routing Protocol, Section 4.2"; } leaf metric { type uint16; description "Metric of the AC. It is used in the routing state calculation and path selection."; } } grouping isis-basic { description "Basic configuration specific to IS-IS."; leaf address-family { type identityref { base vpn-common:address-family; } description "Indicates whether IPv4, IPv6, or both are to be activated."; } leaf area-address { type area-address; mandatory true; description "Area address."; } } Boucadair, et al. Expires 25 January 2025 [Page 46] Internet-Draft Common Attachment Circuit YANG July 2024 // Static routing grouping ipv4-static-rtg-entry { description "Paramters to configure a specific IPv4 static routing entry."; leaf lan { type inet:ipv4-prefix; description "LAN prefix."; } leaf lan-tag { type string; description "Internal tag to be used in service policies."; } leaf next-hop { type union { type inet:ip-address; type predefined-next-hop; } description "The next hop that is to be used for the static route. This may be specified as an IP address or a predefined next-hop type (e.g., 'discard' or 'local-link')."; } leaf metric { type uint32; description "Indicates the metric associated with the static route."; } } grouping ipv4-static-rtg { description "Configuration specific to IPv4 static routing."; list ipv4-lan-prefixes { if-feature "vpn-common:ipv4"; key "lan next-hop"; description "List of LAN prefixes for the site."; uses ipv4-static-rtg-entry; uses ac-common:service-status; } } grouping ipv6-static-rtg-entry { description Boucadair, et al. Expires 25 January 2025 [Page 47] Internet-Draft Common Attachment Circuit YANG July 2024 "Paramters to configure a specific IPv6 static routing entry."; leaf lan { type inet:ipv6-prefix; description "LAN prefixes."; } leaf lan-tag { type string; description "Internal tag to be used in service (e.g., VPN) policies."; } leaf next-hop { type union { type inet:ip-address; type predefined-next-hop; } description "The next hop that is to be used for the static route. This may be specified as an IP address or a predefined next-hop type (e.g., 'discard' or 'local-link')."; } leaf metric { type uint32; description "Indicates the metric associated with the static route."; } } grouping ipv6-static-rtg { description "Configuration specific to IPv6 static routing."; list ipv6-lan-prefixes { if-feature "vpn-common:ipv6"; key "lan next-hop"; description "List of LAN prefixes for the site."; uses ipv6-static-rtg-entry; uses ac-common:service-status; } } // OAM grouping bfd { description "A grouping for basic BFD."; leaf holdtime { type uint32; Boucadair, et al. Expires 25 January 2025 [Page 48] Internet-Draft Common Attachment Circuit YANG July 2024 units "milliseconds"; description "Expected BFD holdtime. The customer may impose some fixed values for the holdtime period if the provider allows the customer to use this function. If the provider doesn't allow the customer to use this function, fixed values will not be set."; reference "RFC 5880: Bidirectional Forwarding Detection (BFD), Section 6.8.18"; } } // redundancy grouping redundancy-group { description "A grouping for redundancy group."; list group { key "group-id"; description "List of group-ids."; leaf group-id { type string; description "Indicates the group-id to which the AC belongs."; } leaf precedence { type identityref { base ac-common:precedence-type; } description "Defines redundancy of an AC."; } } } // QoS grouping bandwidth-parameters { description "A grouping for bandwidth parameters."; leaf cir { type uint64; units "bps"; description "Committed Information Rate (CIR). The maximum number of bits Boucadair, et al. Expires 25 January 2025 [Page 49] Internet-Draft Common Attachment Circuit YANG July 2024 that a port can receive or send during one second over an interface."; } leaf cbs { type uint64; units "bytes"; description "Committed Burst Size (CBS). CBS controls the bursty nature of the traffic. Traffic that does not use the configured CIR accumulates credits until the credits reach the configured CBS."; } leaf eir { type uint64; units "bps"; description "Excess Information Rate (EIR), i.e., excess frame delivery allowed not subject to a Service Level Agreement (SLA). The traffic rate can be limited by EIR."; } leaf ebs { type uint64; units "bytes"; description "Excess Burst Size (EBS). The bandwidth available for burst traffic from the EBS is subject to the amount of bandwidth that is accumulated during periods when traffic allocated by the EIR policy is not used."; } leaf pir { type uint64; units "bps"; description "Peak Information Rate (PIR), i.e., maximum frame delivery allowed. It is equal to or less than sum of CIR and EIR."; } leaf pbs { type uint64; units "bytes"; description "Peak Burst Size (PBS)."; } } grouping bandwidth-per-type { description "Grouping for bandwidth per type."; list bandwidth { Boucadair, et al. Expires 25 January 2025 [Page 50] Internet-Draft Common Attachment Circuit YANG July 2024 key "bw-type"; description "List for bandwidth per type data nodes."; leaf bw-type { type identityref { base vpn-common:bw-type; } description "Indicates the bandwidth type."; } choice type { description "Choice based upon bandwidth type."; case per-cos { description "Bandwidth per CoS."; list cos { key "cos-id"; description "List of Class of Services."; leaf cos-id { type uint8; description "Identifier of the CoS, indicated by a Differentiated Services Code Point (DSCP) or a CE-CLAN CoS (802.1p) value in the service frame."; reference "IEEE Std 802.1Q: Bridges and Bridged Networks"; } uses bandwidth-parameters; } } case other { description "Other bandwidth types."; uses bandwidth-parameters; } } } } } <CODE ENDS> 6. Security Considerations This section uses the template described in Section 3.7 of [I-D.ietf-netmod-rfc8407bis]. Boucadair, et al. Expires 25 January 2025 [Page 51] Internet-Draft Common Attachment Circuit YANG July 2024 The YANG module specified in this document defines schema for data that is designed to be accessed via network management protocols such as NETCONF [RFC6241] or RESTCONF [RFC8040]. The lowest NETCONF layer is the secure transport layer, and the mandatory-to-implement secure transport is Secure Shell (SSH) [RFC6242]. The lowest RESTCONF layer is HTTPS, and the mandatory-to-implement secure transport is TLS [RFC8446]. The Network Configuration Access Control Model (NACM) [RFC8341] provides the means to restrict access for particular NETCONF or RESTCONF users to a preconfigured subset of all available NETCONF or RESTCONF protocol operations and content. The "ietf-ac-common" module defines a set of identities, types, and groupings. These nodes are intended to be reused by other YANG modules. The module by itself does not expose any data nodes that are writable, data nodes that contain read-only state, or RPCs. YANG modules that use the groupings that are defined in this document should identify the corresponding security considerations. For example, reusing some of these groupings will expose privacy-related information (e.g., 'ipv6-lan-prefixes' or 'ipv4-lan-prefixes'). Disclosing such information may be considered a violation of the customer-provider trust relationship. Several groupings ('bgp-authentication', 'ospf-authentication', 'isis-authentication', and 'rip-authentication') rely upon [RFC8177] for authentication purposes. As such, modules that will reuse these groupings will inherit the security considerations discussed in Section 5 of [RFC8177]. Also, these groupings support supplying explicit keys as strings in ASCII format. The use of keys in hexadecimal string format would afford greater key entropy with the same number of key- string octets. However, such a format is not included in this version of the common AC model, because it is not supported by the underlying device modules (e.g., [RFC8695]). 7. IANA Considerations IANA is requested to register the following URI in the "ns" subregistry within the "IETF XML Registry" [RFC3688]: URI: urn:ietf:params:xml:ns:yang:ietf-ac-common Registrant Contact: The IESG. XML: N/A; the requested URI is an XML namespace. IANA is requested to register the following YANG module in the "YANG Module Names" subregistry [RFC6020] within the "YANG Parameters" registry: Boucadair, et al. Expires 25 January 2025 [Page 52] Internet-Draft Common Attachment Circuit YANG July 2024 Name: ietf-ac-common Namespace: urn:ietf:params:xml:ns:yang:ietf-ac-common Prefix: ac-common Maintained by IANA? N Reference: RFC XXXX 8. References 8.1. Normative References [ISO10589] ISO, "Information technology - Telecommunications and information exchange between systems - Intermediate System to Intermediate System intra-domain routeing information exchange protocol for use in conjunction with the protocol for providing the connectionless-mode network service (ISO8473)", 2002, <https://www.iso.org/standard/30932.html>. [RFC1195] Callon, R., "Use of OSI IS-IS for routing in TCP/IP and dual environments", RFC 1195, DOI 10.17487/RFC1195, December 1990, <https://www.rfc-editor.org/rfc/rfc1195>. [RFC2080] Malkin, G. and R. Minnear, "RIPng for IPv6", RFC 2080, DOI 10.17487/RFC2080, January 1997, <https://www.rfc-editor.org/rfc/rfc2080>. [RFC2453] Malkin, G., "RIP Version 2", STD 56, RFC 2453, DOI 10.17487/RFC2453, November 1998, <https://www.rfc-editor.org/rfc/rfc2453>. [RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, DOI 10.17487/RFC3688, January 2004, <https://www.rfc-editor.org/rfc/rfc3688>. [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, <https://www.rfc-editor.org/rfc/rfc4271>. [RFC4577] Rosen, E., Psenak, P., and P. Pillay-Esnault, "OSPF as the Provider/Customer Edge Protocol for BGP/MPLS IP Virtual Private Networks (VPNs)", RFC 4577, DOI 10.17487/RFC4577, June 2006, <https://www.rfc-editor.org/rfc/rfc4577>. [RFC5308] Hopps, C., "Routing IPv6 with IS-IS", RFC 5308, DOI 10.17487/RFC5308, October 2008, <https://www.rfc-editor.org/rfc/rfc5308>. Boucadair, et al. Expires 25 January 2025 [Page 53] Internet-Draft Common Attachment Circuit YANG July 2024 [RFC5492] Scudder, J. and R. Chandra, "Capabilities Advertisement with BGP-4", RFC 5492, DOI 10.17487/RFC5492, February 2009, <https://www.rfc-editor.org/rfc/rfc5492>. [RFC5925] Touch, J., Mankin, A., and R. Bonica, "The TCP Authentication Option", RFC 5925, DOI 10.17487/RFC5925, June 2010, <https://www.rfc-editor.org/rfc/rfc5925>. [RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for the Network Configuration Protocol (NETCONF)", RFC 6020, DOI 10.17487/RFC6020, October 2010, <https://www.rfc-editor.org/rfc/rfc6020>. [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, <https://www.rfc-editor.org/rfc/rfc6241>. [RFC6242] Wasserman, M., "Using the NETCONF Protocol over Secure Shell (SSH)", RFC 6242, DOI 10.17487/RFC6242, June 2011, <https://www.rfc-editor.org/rfc/rfc6242>. [RFC6565] Pillay-Esnault, P., Moyer, P., Doyle, J., Ertekin, E., and M. Lundberg, "OSPFv3 as a Provider Edge to Customer Edge (PE-CE) Routing Protocol", RFC 6565, DOI 10.17487/RFC6565, June 2012, <https://www.rfc-editor.org/rfc/rfc6565>. [RFC6991] Schoenwaelder, J., Ed., "Common YANG Data Types", RFC 6991, DOI 10.17487/RFC6991, July 2013, <https://www.rfc-editor.org/rfc/rfc6991>. [RFC7348] Mahalingam, M., Dutt, D., Duda, K., Agarwal, P., Kreeger, L., Sridhar, T., Bursell, M., and C. Wright, "Virtual eXtensible Local Area Network (VXLAN): A Framework for Overlaying Virtualized Layer 2 Networks over Layer 3 Networks", RFC 7348, DOI 10.17487/RFC7348, August 2014, <https://www.rfc-editor.org/rfc/rfc7348>. [RFC8040] Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF Protocol", RFC 8040, DOI 10.17487/RFC8040, January 2017, <https://www.rfc-editor.org/rfc/rfc8040>. [RFC8077] Martini, L., Ed. and G. Heron, Ed., "Pseudowire Setup and Maintenance Using the Label Distribution Protocol (LDP)", STD 84, RFC 8077, DOI 10.17487/RFC8077, February 2017, <https://www.rfc-editor.org/rfc/rfc8077>. Boucadair, et al. Expires 25 January 2025 [Page 54] Internet-Draft Common Attachment Circuit YANG July 2024 [RFC8177] Lindem, A., Ed., Qu, Y., Yeung, D., Chen, I., and J. Zhang, "YANG Data Model for Key Chains", RFC 8177, DOI 10.17487/RFC8177, June 2017, <https://www.rfc-editor.org/rfc/rfc8177>. [RFC8341] Bierman, A. and M. Bjorklund, "Network Configuration Access Control Model", STD 91, RFC 8341, DOI 10.17487/RFC8341, March 2018, <https://www.rfc-editor.org/rfc/rfc8341>. [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, <https://www.rfc-editor.org/rfc/rfc8342>. [RFC8446] Rescorla, E., "The Transport Layer Security (TLS) Protocol Version 1.3", RFC 8446, DOI 10.17487/RFC8446, August 2018, <https://www.rfc-editor.org/rfc/rfc8446>. [RFC9181] Barguil, S., Gonzalez de Dios, O., Ed., Boucadair, M., Ed., and Q. Wu, "A Common YANG Data Model for Layer 2 and Layer 3 VPNs", RFC 9181, DOI 10.17487/RFC9181, February 2022, <https://www.rfc-editor.org/rfc/rfc9181>. 8.2. Informative References [AC-Common-Tree] "Full Common Attachment Circuit Tree Structure", 2023, <https://github.com/boucadair/attachment-circuit- model/blob/main/yang/full-trees/ac-common-with- groupings.txt>. [I-D.ietf-netmod-rfc8407bis] Bierman, A., Boucadair, M., and Q. Wu, "Guidelines for Authors and Reviewers of Documents Containing YANG Data Models", Work in Progress, Internet-Draft, draft-ietf- netmod-rfc8407bis-14, 5 July 2024, <https://datatracker.ietf.org/doc/html/draft-ietf-netmod- rfc8407bis-14>. [I-D.ietf-opsawg-ac-lxsm-lxnm-glue] Boucadair, M., Roberts, R., Barguil, S., and O. G. de Dios, "A YANG Data Model for Augmenting VPN Service and Network Models with Attachment Circuits", Work in Progress, Internet-Draft, draft-ietf-opsawg-ac-lxsm-lxnm- glue-10, 10 June 2024, <https://datatracker.ietf.org/doc/html/draft-ietf-opsawg- ac-lxsm-lxnm-glue-10>. Boucadair, et al. Expires 25 January 2025 [Page 55] Internet-Draft Common Attachment Circuit YANG July 2024 [I-D.ietf-opsawg-ntw-attachment-circuit] Boucadair, M., Roberts, R., de Dios, O. G., Barguil, S., and B. Wu, "A Network YANG Data Model for Attachment Circuits", Work in Progress, Internet-Draft, draft-ietf- opsawg-ntw-attachment-circuit-11, 15 May 2024, <https://datatracker.ietf.org/doc/html/draft-ietf-opsawg- ntw-attachment-circuit-11>. [I-D.ietf-opsawg-teas-attachment-circuit] Boucadair, M., Roberts, R., de Dios, O. G., Barguil, S., and B. Wu, "YANG Data Models for Bearers and 'Attachment Circuits'-as-a-Service (ACaaS)", Work in Progress, Internet-Draft, draft-ietf-opsawg-teas-attachment-circuit- 13, 29 May 2024, <https://datatracker.ietf.org/doc/html/ draft-ietf-opsawg-teas-attachment-circuit-13>. [I-D.ietf-teas-ietf-network-slice-nbi-yang] Wu, B., Dhody, D., Rokui, R., Saad, T., and J. Mullooly, "A YANG Data Model for the RFC 9543 Network Slice Service", Work in Progress, Internet-Draft, draft-ietf- teas-ietf-network-slice-nbi-yang-13, 9 May 2024, <https://datatracker.ietf.org/doc/html/draft-ietf-teas- ietf-network-slice-nbi-yang-13>. [PYANG] "pyang", 2023, <https://github.com/mbj4668/pyang>. [RFC2918] Chen, E., "Route Refresh Capability for BGP-4", RFC 2918, DOI 10.17487/RFC2918, September 2000, <https://www.rfc-editor.org/rfc/rfc2918>. [RFC4364] Rosen, E. and Y. Rekhter, "BGP/MPLS IP Virtual Private Networks (VPNs)", RFC 4364, DOI 10.17487/RFC4364, February 2006, <https://www.rfc-editor.org/rfc/rfc4364>. [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, <https://www.rfc-editor.org/rfc/rfc4724>. [RFC4760] Bates, T., Chandra, R., Katz, D., and Y. Rekhter, "Multiprotocol Extensions for BGP-4", RFC 4760, DOI 10.17487/RFC4760, January 2007, <https://www.rfc-editor.org/rfc/rfc4760>. [RFC4862] Thomson, S., Narten, T., and T. Jinmei, "IPv6 Stateless Address Autoconfiguration", RFC 4862, DOI 10.17487/RFC4862, September 2007, <https://www.rfc-editor.org/rfc/rfc4862>. Boucadair, et al. Expires 25 January 2025 [Page 56] Internet-Draft Common Attachment Circuit YANG July 2024 [RFC7665] Halpern, J., Ed. and C. Pignataro, Ed., "Service Function Chaining (SFC) Architecture", RFC 7665, DOI 10.17487/RFC7665, October 2015, <https://www.rfc-editor.org/rfc/rfc7665>. [RFC7911] Walton, D., Retana, A., Chen, E., and J. Scudder, "Advertisement of Multiple Paths in BGP", RFC 7911, DOI 10.17487/RFC7911, July 2016, <https://www.rfc-editor.org/rfc/rfc7911>. [RFC8299] Wu, Q., Ed., Litkowski, S., Tomotaki, L., and K. Ogaki, "YANG Data Model for L3VPN Service Delivery", RFC 8299, DOI 10.17487/RFC8299, January 2018, <https://www.rfc-editor.org/rfc/rfc8299>. [RFC8340] Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams", BCP 215, RFC 8340, DOI 10.17487/RFC8340, March 2018, <https://www.rfc-editor.org/rfc/rfc8340>. [RFC8466] Wen, B., Fioccola, G., Ed., Xie, C., and L. Jalil, "A YANG Data Model for Layer 2 Virtual Private Network (L2VPN) Service Delivery", RFC 8466, DOI 10.17487/RFC8466, October 2018, <https://www.rfc-editor.org/rfc/rfc8466>. [RFC8695] Liu, X., Sarda, P., and V. Choudhary, "A YANG Data Model for the Routing Information Protocol (RIP)", RFC 8695, DOI 10.17487/RFC8695, February 2020, <https://www.rfc-editor.org/rfc/rfc8695>. [RFC8969] Wu, Q., Ed., Boucadair, M., Ed., Lopez, D., Xie, C., and L. Geng, "A Framework for Automating Service and Network Management with YANG", RFC 8969, DOI 10.17487/RFC8969, January 2021, <https://www.rfc-editor.org/rfc/rfc8969>. [RFC9182] Barguil, S., Gonzalez de Dios, O., Ed., Boucadair, M., Ed., Munoz, L., and A. Aguado, "A YANG Network Data Model for Layer 3 VPNs", RFC 9182, DOI 10.17487/RFC9182, February 2022, <https://www.rfc-editor.org/rfc/rfc9182>. [RFC9234] Azimov, A., Bogomazov, E., Bush, R., Patel, K., and K. Sriram, "Route Leak Prevention and Detection Using Roles in UPDATE and OPEN Messages", RFC 9234, DOI 10.17487/RFC9234, May 2022, <https://www.rfc-editor.org/rfc/rfc9234>. Boucadair, et al. Expires 25 January 2025 [Page 57] Internet-Draft Common Attachment Circuit YANG July 2024 [RFC9291] Boucadair, M., Ed., Gonzalez de Dios, O., Ed., Barguil, S., and L. Munoz, "A YANG Network Data Model for Layer 2 VPNs", RFC 9291, DOI 10.17487/RFC9291, September 2022, <https://www.rfc-editor.org/rfc/rfc9291>. [RFC9408] Boucadair, M., Ed., Gonzalez de Dios, O., Barguil, S., Wu, Q., and V. Lopez, "A YANG Network Data Model for Service Attachment Points (SAPs)", RFC 9408, DOI 10.17487/RFC9408, June 2023, <https://www.rfc-editor.org/rfc/rfc9408>. Acknowledgments The document reuses many of the structures that were defined in [RFC9181] and [RFC9182]. Thanks to Ebben Aries for the YANG Doctors review, Andy Smith and Gyanh Mishra for the rtg-dir reviews. Thanks to Reza Rokui for the Shepherd review. Contributors Victor Lopez Nokia Email: victor.lopez@nokia.com Ivan Bykov Ribbon Communications Email: Ivan.Bykov@rbbn.com Qin Wu Huawei Email: bill.wu@huawei.com Kenichi Ogaki KDDI Email: ke-oogaki@kddi.com Luis Angel Munoz Vodafone Email: luis-angel.munoz@vodafone.com Boucadair, et al. Expires 25 January 2025 [Page 58] Internet-Draft Common Attachment Circuit YANG July 2024 Authors' Addresses Mohamed Boucadair (editor) Orange Email: mohamed.boucadair@orange.com Richard Roberts (editor) Juniper Email: rroberts@juniper.net Oscar Gonzalez de Dios Telefonica Email: oscar.gonzalezdedios@telefonica.com Samier Barguil Giraldo Nokia Email: samier.barguil_giraldo@nokia.com Bo Wu Huawei Technologies Email: lana.wubo@huawei.com Boucadair, et al. Expires 25 January 2025 [Page 59]