I2RS S. Hares Internet-Draft L. Dunbar Intended status: Standards Track Huawei Expires: July 7, 2016 January 4, 2016 A Yang model for I2RS service topology draft-hares-i2rs-service-topo-dm-03.txt Abstract This document defines I2RS protocol-independent service layer virtual topology data model. This data model utilizes the concepts in the generic I2RS topology model of virtual networks (node, links, termination points) and cross-layer topologies. This virtual service topology may be a composite layer created from the combination of protocol-dependent service layers. Protocol-dependent services layers include: L3VPN, L2VPN, EVPN, E-Tree, and others. 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 http://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 July 7, 2016. Copyright Notice Copyright (c) 2016 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 (http://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 Hares & Dunbar Expires July 7, 2016 [Page 1] Internet-Draft I2RS Service Topology January 2016 the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1. Conventions used in this document . . . . . . . . . . . . 2 1.2. Base Model: the Service-Topology Component . . . . . . . 2 2. High level Yang architecture . . . . . . . . . . . . . . . . 3 2.1. Network level . . . . . . . . . . . . . . . . . . . . . . 3 2.2. Node level . . . . . . . . . . . . . . . . . . . . . . . 4 2.3. Service Link and Termination point . . . . . . . . . . . 4 3. Yang Data Model . . . . . . . . . . . . . . . . . . . . . . . 5 4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 12 5. Security Considerations . . . . . . . . . . . . . . . . . . . 12 6. References . . . . . . . . . . . . . . . . . . . . . . . . . 12 6.1. Normative References . . . . . . . . . . . . . . . . . . 12 6.2. Informative References . . . . . . . . . . . . . . . . . 13 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 13 1. Introduction Service topology in [I-D.ietf-i2rs-yang-network-topo] includes the a virtual topology for a service layer above the L1, L2, and L3 layers. This virtual topology has the generic topology elements of node, link, and terminating point. The virtual service topology is a network-wide topology stored on one routing system which an I2RS agent is connected to. The virtual service topology is a composite of the available services topologies IETF has standard virtual network topologies for L3VPN, L2VPN, and EVPN services, E-TREE services, Seamless MPLS topologies within an As and others. This yang module provides the composite protocol independent service topology that these protocol dependent topologies plug into 1.1. Conventions used in this document The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC2119 [RFC2119]. 1.2. Base Model: the Service-Topology Component The following diagram contains an informal graphical depiction of the main elements of the information model: Hares & Dunbar Expires July 7, 2016 [Page 2] Internet-Draft I2RS Service Topology January 2016 +----------------+ | network | | topology |<... +----------------+ : * * : : | | :...: | | +--------+ +--------+ ...>| node |<.......|link |<... : +--------+<.......+--------+ : : : * : : * : : :..... | : : | :...: | : : | .....>+--------+<........: : | : | TP |<..........: | : ...>+--------+ | : : | : : .....................+---------+ .........................|Direction| +---------+ 2. High level Yang architecture This section describes the Yang High level architecture. 2.1. Network level The service topology network level defines the following high-level yang architeture: module: i2rs-service-topologies augment /nw:network/nw:network-types: +--rw service-topologies-types augment /nw:network: +--rw service-topology-attributes +--rw name? string +--rw flag flag_type; +--rw composite-flag identity-ref +--rw service-topo-id network-id +--rw node-count uint32 +--rw composite-flag_status identity-ref The service topology attributes for a network include the following name - name of the service topology, flag - generic topology flag, Hares & Dunbar Expires July 7, 2016 [Page 3] Internet-Draft I2RS Service Topology January 2016 composite-flags - bit mask with flags of service layer topologies network topology node available to create service topology from. These topologies include: L3VPN, L2VPN, and EVPN services, E-TREE services, Seamless MPLS topologies within an AS and others. service-topo-id - service topology identifier. node-count - count of nodes in composite service topology, composite-flag_status - status flag for each of the composite topologies on whether portions of the topology are included in the composite. 2.2. Node level module: i2rs-service-topologies .... augment /nw:network/nw:node +--rw node-service-attributes +--rw name? inet:domain-name +--rw composite_flag* identityref; +--rw service-node-id uint32 +--rw node-svc_status* identityref; The additional fields in the service attributes are the following: name - name of network node, flag - generic topology node flag, service-node-id - the id for the service node in the composite network, node-svc-type - the type of service node. The service node can be a member of one of the existing topology type (L3VPN, L2VPN, EVPN, E-TREE, Seamless MPLS, MPLS-TE, MPLS node, or I2RS created). 2.3. Service Link and Termination point Hares & Dunbar Expires July 7, 2016 [Page 4] Internet-Draft I2RS Service Topology January 2016 augment /nw:network/nt:link: +--rw service-link-attributes +--rw name? string +--rw svc-link-type identityref +--rw metric? uint32 augment /nw:network/nw:node/nt:termination-point: +--rw service-termination-point-attributes +--rw tp-svc-id +--rw (supporting-termination-point) () +--:(service) | +--rw service-network-id leafref | +--rw service-node-id leafref | +--rw service-tp-id leafref +--:(ip) | +--rw ip-address inet:ip-address +--:(unnumbered) +--rw unnumbered-id? uint32 The augmentation to the service topology is the service link attributes which include: name - name of the link, svc-link-type - the service link type used to create this composite service link. metric - the metric of the service type The augmentation to the termination point include the following tp-svc-id - service id for the termination point, supporting termination point* - with a)references to the service network id, node id and termination point for service id, or b) an ip address, or c) an unnumbered link address 3. Yang Data Model file "ietf-i2rs-service-topology@2016-01-03.yang" module ietf-i2rs-service-topology{ namespace "urn:ietf:params:xml:ns:yang:ietf-i2rs-service-topology"; prefix i2rs-st; import ietf-inet-types { prefix inet; } import ietf-network { Hares & Dunbar Expires July 7, 2016 [Page 5] Internet-Draft I2RS Service Topology January 2016 prefix nw; } import ietf-network-topology { prefix "nt"; } organization "IETF"; contact "email: shares@ndzh.com; email: linda.dunbar@huawei.com; "; description "This module defines a model for the service topology."; revision 2016-01-03{ description "Version 1 - initial version; Version 2 - yang format fixed; version 3 - error in xml file"; reference "draft-hares-i2rs-service-topo-dm-01.txt"; } identity svc-topo-flag-identity { description "Base type for svc flags"; } identity l3vpn-svc-topo { base svc-topo-flag-identity; description "L3VPN service type"; } identity l2vpn-svc-topo { base svc-topo-flag-identity; description "L2VPN service type"; } identity EVPN-svc-topo { base svc-topo-flag-identity; description "EVPN service type"; } identity Seamless-MPLS-svc-topo { base svc-topo-flag-identity; description "Seamless MPLS service type"; } identity Etree-svc-topo { base svc-topo-flag-identity; description "Seamless MPLS service type"; } identity I2rs-svc-topo { Hares & Dunbar Expires July 7, 2016 [Page 6] Internet-Draft I2RS Service Topology January 2016 base svc-topo-flag-identity; description "I2RS create service topo"; } identity svc-tp-type { description "Base type for service termination-point type flags"; } identity svc-tp-type-service { base svc-tp-type; description "service type"; } identity svc-tp-type-ip { base svc-tp-type; description "service IP"; } identity svc-tp-type-unnum { base svc-tp-type; description "service unnumbered link"; } identity service-topology-types{ description "service topology type"; } grouping service-topology-types { leaf service-type { type identityref { base svc-topo-flag-identity; } description "list of service topology type supported"; } description "service topology types"; } grouping service-topology-attributes { leaf name { type string; description "name of service topology"; } leaf composite-flag { type identityref { base service-topology-types; } Hares & Dunbar Expires July 7, 2016 [Page 7] Internet-Draft I2RS Service Topology January 2016 description "other topologies this topology is configured to be a composite of (L3VPN, L2VPN, I2RS only)"; } leaf service-topo-id { type nw:network-id; description "service topology id to a service topology instance."; } leaf service-id-number { type uint32; description "ID for topology"; } leaf node-count { type uint32; description "count of service level nodes in the network."; } leaf composite-flag-status { type identityref { base svc-topo-flag-identity;} description "other topologies this topology is currently a composite of (L3VPN, L2VPN, I2RS only)"; } description "Group of attributes for service topology"; } grouping node-svc-attribute { leaf domain-name{ type inet:domain-name; description "Domain name for node"; } leaf composite-flag { type identityref { base svc-topo-flag-identity; } description "virtual network node can be composite of the topologies list (L3VPN, L2VPN, I2RS only)"; } leaf service-node-id { type uint32; Hares & Dunbar Expires July 7, 2016 [Page 8] Internet-Draft I2RS Service Topology January 2016 description "ID for node at service level"; } leaf node-svc_status { type identityref { base service-topology-types; } description "other topologies this topology is currewntly be composed of (L3VPN, L2VPN, I2RS only)"; } description "grouping of composite flag"; } grouping service-link-attributes { leaf name { type string; description "name of service link"; } leaf link-id { type uint32; description "link id"; } leaf svc-link-type { type identityref { base service-topology-types; } description "other topologies this link is current a composite of (L3VPN, L2VPN, I2RS only)"; } leaf metric { type uint32; description "link metric which may need to expand or link to TE topologies."; } description "grouping of service link attribute"; } grouping service-termination-point-attributes { leaf svc-tp-id { Hares & Dunbar Expires July 7, 2016 [Page 9] Internet-Draft I2RS Service Topology January 2016 type uint32; description "termination point id"; } container supporting-termination-point { leaf svc-tp-type { type identityref { base svc-tp-type; } description "other topologies this link termination point is part of (L3VPN, L2VPN, or I2RS only)"; } choice svc-tp-support-type{ case svc-tp-type-service { leaf service-network-id { type uint32; description "service network id"; } leaf service-node-id { type uint32; description "service node id"; } leaf service-link-id { type uint32; description "service link id"; } description "network, node, tp that supports this termination point"; } case svc-tp-type-inet { leaf ip-address{ type inet:ip-address; description "ip address"; } description "inet svc tp"; } case svc-tp-type-unnum { leaf unnumbered-id { type uint32; description "unnumbered id"; } description "unnumber svc tp"; } description "service termination Hares & Dunbar Expires July 7, 2016 [Page 10] Internet-Draft I2RS Service Topology January 2016 point type cases"; } description "container of supporting termination point"; } description "grouping of service-termination-point-attributes"; } /* * Data nodes */ augment "/nw:networks/nw:network/nw:network-types"{ uses service-topology-types; description "augment the network-tpyes with the service-topology-types grouping"; } augment "/nw:networks/nw:network/nw:node" { leaf name { type inet:domain-name; description "service name."; } list composite_fag { key "service-node-id"; leaf service-node-id{ type uint32; description "service node id."; } leaf node-svc-type{ type string; description "node service type."; } leaf-list next-hop{ type uint32; description "next hop id."; } description "the list of composite flag."; } description "augments node list"; } augment "/nw:networks/nw:network"{ Hares & Dunbar Expires July 7, 2016 [Page 11] Internet-Draft I2RS Service Topology January 2016 uses service-topology-attributes; description "augment the network with the servcie-topolgoy-attributes"; } augment "/nw:networks/nw:network/nw:node"{ uses node-svc-attribute; description "augment the node with the node-svc-attribute"; } augment "/nw:networks/nw:network/nt:link" { uses service-link-attributes; description "augment the link with service-link-attributes"; } augment "/nw:networks/nw:network/nw:node/nt:termination-point"{ uses service-termination-point-attributes; description "augment the termination-point with service-termination-point-attributes"; } } // module i2rs-service-topology 4. IANA Considerations TBD 5. Security Considerations TBD 6. References 6.1. Normative References [I-D.ietf-i2rs-yang-network-topo] Clemm, A., Medved, J., Varga, R., Tkacik, T., Bahadur, N., and H. Ananthakrishnan, "A Data Model for Network Topologies", draft-ietf-i2rs-yang-network-topo-02 (work in progress), December 2015. [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . Hares & Dunbar Expires July 7, 2016 [Page 12] Internet-Draft I2RS Service Topology January 2016 6.2. Informative References [I-D.ietf-i2rs-yang-l3-topology] Clemm, A., Medved, J., Varga, R., Tkacik, T., Liu, X., Bryskin, I., Guo, A., Ananthakrishnan, H., Bahadur, N., and V. Beeram, "A YANG Data Model for Layer 3 Topologies", draft-ietf-i2rs-yang-l3-topology-01 (work in progress), December 2015. Authors' Addresses Susan Hares Huawei 7453 Hickory Hill Saline, MI 48176 USA Email: shares@ndzh.com Linda Dunbar Huawei USA Email: linda.dunbar@huawei.com Hares & Dunbar Expires July 7, 2016 [Page 13]