SPRING Working Group K. Raza Internet-Draft J. Rajamanickam Intended status: Standards Track Cisco Systems, Inc. Expires: September 6, 2018 X. Liu Jabil Z. Hu Huawei Technologies I. Hussain Infinera Corporation H. Shah Ciena Corporation D. Voyer Bell Canada H. Elmalky Ericsson S. Matsushima K. Horiba SoftBank A. AbdelSalam Gran Sasso Science Institute, Italy March 5, 2018 YANG Data Model for SRv6 Base and Static draft-raza-spring-srv6-yang-01.txt Abstract This document describes a YANG data model for Segment Routing IPv6 (SRv6) base. The model serves as a base framework for configuring and managing an SRv6 subsystem and expected to be augmented by other SRv6 technology models accordingly. Additionally, this document also specifies the model for the SRv6 Static application. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at https://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." Raza, et al. Expires September 6, 2018 [Page 1] Internet-Draft YANG Data Model for SRv6 March 2018 This Internet-Draft will expire on September 6, 2018. Copyright Notice Copyright (c) 2018 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Specification of Requirements . . . . . . . . . . . . . . . . 3 3. YANG Model . . . . . . . . . . . . . . . . . . . . . . . . . 4 3.1. Overview . . . . . . . . . . . . . . . . . . . . . . . . 4 3.2. SRv6 Types . . . . . . . . . . . . . . . . . . . . . . . 4 3.3. SRv6 Base . . . . . . . . . . . . . . . . . . . . . . . . 5 3.3.1. Configuration . . . . . . . . . . . . . . . . . . . . 5 3.3.2. State . . . . . . . . . . . . . . . . . . . . . . . . 6 3.3.3. Notification . . . . . . . . . . . . . . . . . . . . 8 3.4. SRv6 Static . . . . . . . . . . . . . . . . . . . . . . . 9 3.4.1. Configuration . . . . . . . . . . . . . . . . . . . . 9 3.4.2. State . . . . . . . . . . . . . . . . . . . . . . . . 13 3.4.3. Notification . . . . . . . . . . . . . . . . . . . . 13 4. Work In Progress . . . . . . . . . . . . . . . . . . . . . . 14 5. Pending Items . . . . . . . . . . . . . . . . . . . . . . . . 14 6. YANG Specification . . . . . . . . . . . . . . . . . . . . . 14 6.1. SRv6 Types . . . . . . . . . . . . . . . . . . . . . . . 15 6.2. SRv6 Base . . . . . . . . . . . . . . . . . . . . . . . . 27 6.3. SRv6 Static . . . . . . . . . . . . . . . . . . . . . . . 41 7. Security Considerations . . . . . . . . . . . . . . . . . . . 58 8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 58 9. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 58 10. References . . . . . . . . . . . . . . . . . . . . . . . . . 58 10.1. Normative References . . . . . . . . . . . . . . . . . . 58 10.2. Informative References . . . . . . . . . . . . . . . . . 59 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 61 Raza, et al. Expires September 6, 2018 [Page 2] Internet-Draft YANG Data Model for SRv6 March 2018 1. Introduction The Network Configuration Protocol (NETCONF) [RFC6241] is one of the network management protocols that defines mechanisms to manage network devices. YANG [RFC6020] is a modular language that represents data structures in an XML tree format, and is used as a data modeling language for the NETCONF. Segment Routing (SR), as defined in [I-D.ietf-spring-segment-routing], leverages the source routing paradigm where a node steers a packet through an ordered list of instructions, called segments. SR, thus, allows enforcing a flow through any topological path and/or service chain while maintaining per-flow state only at the ingress nodes to the SR domain. When applied to ipv6 data-plane (i.e. SRv6), SR requires a type of routing header (SRH) in an IPv6 packet that is used to encode an ordered list of IPv6 addresses (SIDs). The active segment is indicated by the Destination Address of the packet, and the next segment is indicated by a pointer in the SRH [I-D.ietf-6man-segment-routing-header]. The various functions and behaviors corresponding to network programming using SRv6 are specified in [I-D.filsfils-spring-srv6-network-programming]. This document introduces a YANG data model for base SRv6 that would serve as a base framework for configuring and managing an SRv6 subsystem. It is expected that other SRv6 technology models (e.g. ISIS, OSPFv3, BGP, EVPN, Service Chaining) will augment this model accordingly. Furthermore, to illustrate basic behaviors as captured in [I-D.filsfils-spring-srv6-network-programming], this document also specifies a YANG model for the SRv6-Static application. The model currently defines the following constructs that are used for managing SRv6: o Configuration o Operational State o Notifications 2. Specification of Requirements 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]. Raza, et al. Expires September 6, 2018 [Page 3] Internet-Draft YANG Data Model for SRv6 March 2018 3. YANG Model 3.1. Overview This document defines following new YANG modules: o ietf-srv6-types: defines common and basic types related to SRv6 o ietf-srv6-base: specifies management model for SRv6 base constructs (locator, SIDs, etc.) o ietf-srv6-static: specifies management model for SRv6-static application The modeling in this document complies with the Network Management Datastore Architecture (NMDA) [I-D.ietf-netmod-revised-datastores]. The operational state data is combined with the associated configuration data in the same hierarchy [I-D.ietf-netmod-rfc6087bis]. When protocol states are retrieved from the NMDA operational state datastore, the returned states cover all "config true" (rw) and "config false" (ro) nodes defined in the schema. 3.2. SRv6 Types SRv6 common types and definitions are defined in the new module "ietf-srv6-types". The main types defined in this module include: o srv6-sid: SRv6 SID o srv6-func-opcode: Typedef for FUNC opcode in an SRv6 SID o srv6-func-opcode-reserved: Typedef for "reserved" FUNC opcode o srv6-func-opcode-unreserved: Typedef for "unreserved" (allocatable) FUNC opcode o srv6-func-opcode-reserved-type: Enum (list) of "reserved" FUNC opcode o srv6-endpoint-type: SRv6 Endpoint behaviors [I-D.filsfils-spring-srv6-network-programming] identity type o srv6-transit-type: SRv6 Transit behavior types [I-D.filsfils-spring-srv6-network-programming] enumeration o srv6-security-rule-type: SRv6 Security rule type [I-D.filsfils-spring-srv6-network-programming] enumeration Raza, et al. Expires September 6, 2018 [Page 4] Internet-Draft YANG Data Model for SRv6 March 2018 o srv6-counter-type: SRv6 Counter type [I-D.filsfils-spring-srv6-network-programming] enumeration The associated YANG specification for this module is captured in Section 6.1. 3.3. SRv6 Base The base SRv6 model is captured by ietf-srv6-base module. This module augments "/rt:routing" and specifies the configuration, operational state, and notification events required to manage base SRv6. The associated YANG specification for this module is captured in Section 6.2. 3.3.1. Configuration The module defines some fundamental items required to configure an SRv6 network: o SRv6 Enablement: Enable Segment-Routing SRv6 feature o Encapsulation Parameters: Provide encapsulation related parameters, such as source-address and ip-ttl-propagation, to be used when performing T.Encap* o Locator(s) Specification: SRv6 locator is a fundamental construct for an SRv6 network. This is the construct from which SID (function opcodes) are allocated that on the local box, and advertised to and used by remote nodes for reachability. A locator is identified by a name and has associated prefix. It is possible to have more than one locator per node. In case of more than one locator, there is one and only one locator designated as the default locator. Following is a simplified graphical representation of the data model for SRv6 base configuration Raza, et al. Expires September 6, 2018 [Page 5] Internet-Draft YANG Data Model for SRv6 March 2018 module: ietf-srv6-base augment /rt:routing: +--rw srv6 +--rw enable? boolean +--rw encapsulation | +--rw source-address? inet:ipv6-address | +--rw ip-ttl-propagation? boolean +--rw locators +--rw locator* [name] +--rw name string +--rw enable? boolean +--rw is-default boolean +--rw prefix +--rw address inet:ipv6-address +--rw length srv6-types:srv6-locator-len Figure 1: SRv6 Base - Config Tree 3.3.2. State As per NMDA model, the state related to configuration items specified in above section Section 3.3.1 can be retrieved from the same tree. This section defines other operational state items related to SRv6 base. The operational state corresponding to the SRv6 base includes: o node capabilities: provides information on the node (hardware) capabilities and support regarding various SRv6 aspects and features including end behaviors, transit behaviors, security rules, counter/stats support, and other SRv6 parameters that need to be signaled in an SRv6 network by the protocols. o locator: provides information related to a locator. The information includes locator operational state, and state of address conflict with any ipv6 address configured on local interfaces etc. o local-sid: provides information related to local-SIDs allocated and/or installed on the node. This includes two types of information: 1. aggregate across all local-SIDs such as aggregate counters 2. per local-SID information such as allocation type (dynamic or explicit), SID owner protocol(s)/client(s), forwarding [paths] information, and stats/counters. Raza, et al. Expires September 6, 2018 [Page 6] Internet-Draft YANG Data Model for SRv6 March 2018 Following is a simplified graphical representation of the data model for the SRv6 operational state: module: ietf-srv6-base augment /rt:routing: +--rw srv6 +--rw locators | +--rw locator* [name] | +--rw name string | +--ro operational-status? srv6-types:srv6-status-type | +--ro is-in-address-conflict? boolean +--ro node-capabilities | +--ro end-behavior* [type] | | +--ro type identityref | | +--ro supported boolean | +--ro transit-behavior* [type] | | +--ro type srv6-types:srv6-transit-type | | +--ro supported boolean | +--ro signaled-parameters | | +--ro max-sl? uint8 | | +--ro max-end-pop-srh? uint8 | | +--ro max-t_insert? uint8 | | +--ro max-t_encap? uint8 | | +--ro max-end_d? uint8 | +--ro security-rule* [type] | | +--ro type srv6-types:srv6-security-rule-type | | +--ro supported boolean | +--ro counters* [type] | +--ro type srv6-types:srv6-counter-type | +--ro supported boolean +--ro local-sids +--ro counters | +--ro cnt3 | +--ro in-pkts? yang:counter64 | +--ro in-octets? yang:counter64 +--ro local-sid* [sid] +--ro sid srv6-types:srv6-sid +--ro locator-ref? -> /rt:routing/srv6:srv6/locators/locator/name +--ro is-reserved? boolean +--ro end-behavior-type? identityref +--ro alloc-type? srv6-types:sid-alloc-type +--ro owner* [type instance] | +--ro type identityref | +--ro instance string | +--ro is-winner? boolean +--ro forwarding | +--ro is-installed? boolean Raza, et al. Expires September 6, 2018 [Page 7] Internet-Draft YANG Data Model for SRv6 March 2018 | +--ro next-hop-type? srv6-types:srv6-nexthop-type | +--ro paths | +--ro path* [path-index] | +--ro path-index uint8 | +--ro l2 | | +--ro interface? if:interface-ref | +--ro l3 | | +--ro interface? if:interface-ref | | +--ro next-hop? inet:ip-address | | +--ro weight? uint32 | | +--ro role? enumeration | | +--ro backup-path-index? uint8 | +--ro (encap-type)? | +--:(srv6) | | +--ro out-sid* [sid] | | +--ro sid srv6-types:srv6-sid | +--:(mpls) | +--ro out-label* [label] | +--ro label rt-types:mpls-label +--ro counters +--ro cnt1 +--ro in-pkts? yang:counter64 +--ro in-octets? yang:counter64 Figure 2: SRv6 Base - State Tree 3.3.3. Notification This model defines a list of notifications to inform an operator of important events detected during the SRv6 operation. These events include events related to: o locator operational state changes o local-SID collision event Following is a simplified graphical representation of the data model for SRv6 notifications: Raza, et al. Expires September 6, 2018 [Page 8] Internet-Draft YANG Data Model for SRv6 March 2018 module: ietf-srv6-base notifications: +---n srv6-locator-status-event | +--ro operational-status? srv6-types:srv6-status-type | +--ro locator-ref? -> /rt:routing/srv6:srv6/locators/locator/name +---n srv6-sid-collision-event +--ro sid? srv6-types:srv6-sid +--ro existing | +--ro end-behavior-type? identityref +--ro requested +--ro end-behavior-type? identityref Figure 3: SRv6 Base - Notification Tree 3.4. SRv6 Static SRv6-Static application allows a user to specify SRv6 local SIDs and program them in the forwarding plane. The SRv6-Static model is captured in the ietf-srv6-static module. The associated YANG specification for this module is captured in Section 6.3. 3.4.1. Configuration The SRv6-Static configuration augments the SRv6-base locator tree "/rt:routing/srv6:srv6/srv6:locators/srv6:locator" Following are salient features of SRv6-Static config model: o Allows static (explicit) configuration for local-SIDs under a given locator o Given that entry is scoped under a locator, the key for each entry is function "opcode" o A user must also specify end-behavior type (End* function) associated with the entry o A user must also specify behavior-specific data with each entry. For example, for any end behavior requiring a table lookup, a lookup-table need be provided. Similarly, for any end behavior with forwarding next-hops need to specify next-hop information. The example of former include End, End.T, End.DT4, End.DT6, and Raza, et al. Expires September 6, 2018 [Page 9] Internet-Draft YANG Data Model for SRv6 March 2018 End.DT46, whereas example of later include End.X, End.DX4, End.DX6, End.B6, End.BM etc. o Each local-SID entry has zero or more forwarding paths specified. o A forwarding path has next-hop type that depends on the end behavior, and could be either ipv6, or ipv4, or mpls, or l2 type. For example, End.X, End.DX4, End.DX6, End.B6, End.BM, and End.DX2 will have ipv6, ipv4, ipv6, ipv6, mpls, and l2 next-hop types respectively o For each forwarding next-hop type, the appropriate path attributes are to be specified as well. For L2 type, the only other information required is the L2 interface name. Whereas for L3 (ipv6, ipv4, mpls) types, the information includes L3 interface name, next-hop IP address, weight, and protection information. o Depending on the end behavior type, a forwarding path may have either MPLS or SRv6 encapsulation -- i.e., Stack of out-labels or Stack of SRv6 out-SIDs. The example of former is End.BM and example of later include the rest (End.X, End.DX4/DX6, End.B6 etc.). Following is a simplified graphical representation of the data model for SRv6 Static configuration module: ietf-srv6-static augment /rt:routing/srv6:srv6/srv6:locators/srv6:locator: +--rw static +--rw local-sids +--rw sid* [opcode] +--rw opcode srv6-types:srv6-func-opcode-unreserved +--rw end-behavior-type identityref +--rw end +--rw end_psp +--rw end_usp +--rw end_psp_usp +--rw end-t | +--rw lookup-table-ipv6 srv6-types:table-id +--rw end-t_psp | +--rw lookup-table-ipv6 srv6-types:table-id +--rw end-t_usp | +--rw lookup-table-ipv6 srv6-types:table-id +--rw end-t_psp_usp | +--rw lookup-table-ipv6 srv6-types:table-id +--rw end-x | +--rw protected? boolean Raza, et al. Expires September 6, 2018 [Page 10] Internet-Draft YANG Data Model for SRv6 March 2018 | +--rw paths | +--rw path* [path-index] | +--rw path-index uint8 | +--rw interface? if:interface-ref | +--rw next-hop? inet:ipv6-address | +--rw weight? uint32 | +--rw role? enumeration | +--rw backup-path-index? uint8 | +--rw encap | +--rw out-sid* [sid] | +--rw sid srv6-types:srv6-sid +--rw end-x_psp | +--rw protected? boolean | +--rw paths | +--rw path* [path-index] | +--rw path-index uint8 | +--rw interface? if:interface-ref | +--rw next-hop? inet:ipv6-address | +--rw weight? uint32 | +--rw role? enumeration | +--rw backup-path-index? uint8 | +--rw encap | +--rw out-sid* [sid] | +--rw sid srv6-types:srv6-sid +--rw end-x_usp | +--rw protected? boolean | +--rw paths | +--rw path* [path-index] | +--rw path-index uint8 | +--rw interface? if:interface-ref | +--rw next-hop? inet:ipv6-address | +--rw weight? uint32 | +--rw role? enumeration | +--rw backup-path-index? uint8 | +--rw encap | +--rw out-sid* [sid] | +--rw sid srv6-types:srv6-sid +--rw end-x_psp_usp | +--rw protected? boolean | +--rw paths | +--rw path* [path-index] | +--rw path-index uint8 | +--rw interface? if:interface-ref | +--rw next-hop? inet:ipv6-address | +--rw weight? uint32 | +--rw role? enumeration | +--rw backup-path-index? uint8 | +--rw encap Raza, et al. Expires September 6, 2018 [Page 11] Internet-Draft YANG Data Model for SRv6 March 2018 | +--rw out-sid* [sid] | +--rw sid srv6-types:srv6-sid +--rw end-b6 | +--rw policy-name string | +--rw paths | +--rw path* [path-index] | +--rw path-index uint8 | +--rw interface? if:interface-ref | +--rw next-hop? inet:ipv6-address | +--rw weight? uint32 | +--rw role? enumeration | +--rw backup-path-index? uint8 | +--rw encap | +--rw out-sid* [sid] | +--rw sid srv6-types:srv6-sid +--rw end-b6-encaps | +--rw policy-name string | +--rw source-address inet:ipv6-address | +--rw paths | +--rw path* [path-index] | +--rw path-index uint8 | +--rw interface? if:interface-ref | +--rw next-hop? inet:ipv6-address | +--rw weight? uint32 | +--rw role? enumeration | +--rw backup-path-index? uint8 | +--rw encap | +--rw out-sid* [sid] | +--rw sid srv6-types:srv6-sid +--rw end-bm | +--rw policy-name string | +--rw paths | +--rw path* [path-index] | +--rw path-index uint8 | +--rw interface? if:interface-ref | +--rw next-hop? inet:ip-address | +--rw weight? uint32 | +--rw role? enumeration | +--rw backup-path-index? uint8 | +--rw encap | +--rw out-label* [label] | +--rw label rt-types:mpls-label +--rw end-dx6 | +--rw paths | +--rw path* [path-index] | +--rw path-index uint8 | +--rw interface? if:interface-ref | +--rw next-hop? inet:ipv6-address Raza, et al. Expires September 6, 2018 [Page 12] Internet-Draft YANG Data Model for SRv6 March 2018 | +--rw weight? uint32 | +--rw role? enumeration | +--rw backup-path-index? uint8 | +--rw encap | +--rw out-sid* [sid] | +--rw sid srv6-types:srv6-sid +--rw end-dx4 | +--rw paths | +--rw path* [path-index] | +--rw path-index uint8 | +--rw interface? if:interface-ref | +--rw next-hop? inet:ipv4-address | +--rw weight? uint32 | +--rw role? enumeration | +--rw backup-path-index? uint8 | +--rw encap | +--rw out-sid* [sid] | +--rw sid srv6-types:srv6-sid +--rw end-dt6 | +--rw lookup-table-ipv6 srv6-types:table-id +--rw end-dt4 | +--rw lookup-table-ipv4 srv6-types:table-id +--rw end-dt46 | +--rw lookup-table-ipv4 srv6-types:table-id | +--rw lookup-table-ipv6 srv6-types:table-id +--rw end-dx2 | +--rw paths | +--rw interface if:interface-ref +--rw end-otp Figure 4: SRv6 Static - Config Tree 3.4.2. State As per NMDA model, the state related to configuration items specified in above section Section 3.4.1 can be retrieved from the same tree. The state regarding the local-SIDs created by SRv6-static model can be obtained using the state model of SRv6-base. Hence, there is no additional state identified at this time for SRv6-static. 3.4.3. Notification None. Raza, et al. Expires September 6, 2018 [Page 13] Internet-Draft YANG Data Model for SRv6 March 2018 4. Work In Progress The YANG modeling for the corresponding SRv6 protocols and technologies is in progress as follows: o SRv6 ISIS: Transport SIDs, TILFA, and Microloop Avoidance [I-D.bashandy-isis-srv6-extensions] o SRv6 TE: SR Policy [I-D.filsfils-spring-segment-routing-policy] o SRv6 BGP: L3VPN and Global Table [I-D.dawra-idr-srv6-vpn] o SRv6 EVPN [I-D.dawra-idr-srv6-vpn] o SRv6 Service Chaining [I-D.xuclad-spring-sr-service-chaining] o SRv6 Mobile User-Plane [I-D.ietf-dmm-srv6-mobile-uplane] The corresponding models will be specified later either in this or in a separate document. 5. Pending Items Following are the items that will be closed in next revisions: o Align SRv6 base with SR (MPLS) model [I-D.ietf-spring-sr-yang]. o Extend local-SID collision event/notification in SRv6-base model. o Add RPC support in the SRv6-base model. o Add EVPN End functions in the SRv6-Static model. o Add Service Chaining End functions in the SRv6-Static model. o Add ARGS support in the SRv6-Static model. o QoS support 6. YANG Specification Following are actual YANG definition for SRv6 modules defined earlier in the document. Raza, et al. Expires September 6, 2018 [Page 14] Internet-Draft YANG Data Model for SRv6 March 2018 6.1. SRv6 Types file "ietf-srv6-types@2018-03-01.yang" --> module ietf-srv6-types { namespace "urn:ietf:params:xml:ns:yang:ietf-srv6-types"; prefix srv6-types; import ietf-inet-types { prefix inet; } organization "IETF SPRING Working Group"; contact "WG Web: WG List: Editor: Kamran Raza Editor: Jaganbabu Rajamanickam Editor: Xufeng Liu Editor: Zhibo Hu Editor: Iftekhar Hussain Editor: Himanshu Shah Editor: Daniel Voyer Editor: Hani Elmalky Editor: Satoru Matsushima Editor: Katsuhiro Horiba Raza, et al. Expires September 6, 2018 [Page 15] Internet-Draft YANG Data Model for SRv6 March 2018 Editor: Ahmed AbdelSalam "; description "This YANG module defines the essential types for the management of Segment-Routing with IPv6 dataplane (SRv6). Copyright (c) 2018 IETF Trust and the persons identified as authors of the code. All rights reserved. Redistribution and use in source and binary forms, with or without modification, is permitted pursuant to, and subject to the license terms contained in, the Simplified BSD License set forth in Section 4.c of the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info)."; reference "RFC XXXX"; revision 2018-03-01 { description "Updated to align with SRv6 network programming draft rev 04"; reference "RFC XXXX: YANG Data Model for SRv6"; } revision 2017-11-12 { description "Initial revision"; reference "RFC XXXX: YANG Data Model for SRv6"; } identity srv6-endpoint-type { description "Base identity from which specific SRv6 Endpoint types are derived."; } /* Endpoints defined under draft-filsfils-spring-srv6-network-programming */ identity End { base srv6-endpoint-type; description "End function (variant: no PSP, no USP)."; Raza, et al. Expires September 6, 2018 [Page 16] Internet-Draft YANG Data Model for SRv6 March 2018 reference "draft-filsfils-spring-srv6-network-programming-04"; } identity End_PSP { base srv6-endpoint-type; description "End function (variant: PSP only)."; reference "draft-filsfils-spring-srv6-network-programming-04"; } identity End_USP { base srv6-endpoint-type; description "End function (variant: USP only)."; reference "draft-filsfils-spring-srv6-network-programming-04"; } identity End_PSP_USP { base srv6-endpoint-type; description "End function (variant: PSP and USP)."; reference "draft-filsfils-spring-srv6-network-programming-04"; } identity End.X { base srv6-endpoint-type; description "Endpoint with cross-connect to an array of layer-3 adjacencies (variant: no PSP, no USP)."; reference "draft-filsfils-spring-srv6-network-programming-04"; } identity End.X_PSP { base srv6-endpoint-type; description "Endpoint with cross-connect to an array of layer-3 adjacencies (variant: PSP only)."; reference "draft-filsfils-spring-srv6-network-programming-04"; } identity End.X_USP { base srv6-endpoint-type; Raza, et al. Expires September 6, 2018 [Page 17] Internet-Draft YANG Data Model for SRv6 March 2018 description "Endpoint with cross-connect to an array of layer-3 adjacencies (variant: USP only)."; reference "draft-filsfils-spring-srv6-network-programming-04"; } identity End.X_PSP_USP { base srv6-endpoint-type; description "Endpoint with cross-connect to an array of layer-3 adjacencies (variant: PSP and USP)."; reference "draft-filsfils-spring-srv6-network-programming-04"; } identity End.T { base srv6-endpoint-type; description "Endpoint with specific IPv6 table lookup (variant: no PSP, no USP)."; reference "draft-filsfils-spring-srv6-network-programming-04"; } identity End.T_PSP { base srv6-endpoint-type; description "Endpoint with specific IPv6 table lookup (variant: PSP only)."; reference "draft-filsfils-spring-srv6-network-programming-04"; } identity End.T_USP { base srv6-endpoint-type; description "Endpoint with specific IPv6 table lookup (variant: USP only)."; reference "draft-filsfils-spring-srv6-network-programming-04"; } identity End.T_PSP_USP { base srv6-endpoint-type; description "Endpoint with specific IPv6 table lookup (variant: PSP and USP)."; Raza, et al. Expires September 6, 2018 [Page 18] Internet-Draft YANG Data Model for SRv6 March 2018 reference "draft-filsfils-spring-srv6-network-programming-04"; } identity End.B6 { base srv6-endpoint-type; description "Endpoint bound to an SRv6 Policy"; reference "draft-filsfils-spring-srv6-network-programming-04"; } identity End.B6.Encaps { base srv6-endpoint-type; description "This is a variation of the End.B6 behavior where the SRv6 Policy also includes an IPv6 Source Address A."; reference "draft-filsfils-spring-srv6-network-programming-04"; } identity End.BM { base srv6-endpoint-type; description "Endpoint bound to an SR-MPLS Policy"; reference "draft-filsfils-spring-srv6-network-programming-04"; } identity End.DX6 { base srv6-endpoint-type; description "Endpoint with decapsulation and cross-connect to an array of IPv6 adjacencies"; reference "draft-filsfils-spring-srv6-network-programming-04"; } identity End.DX4 { base srv6-endpoint-type; description "Endpoint with decapsulation and cross-connect to an array of IPv4 adjacencies"; reference "draft-filsfils-spring-srv6-network-programming-04"; } Raza, et al. Expires September 6, 2018 [Page 19] Internet-Draft YANG Data Model for SRv6 March 2018 identity End.DT6 { base srv6-endpoint-type; description "Endpoint with decapsulation and specific IPv6 table lookup"; reference "draft-filsfils-spring-srv6-network-programming-04"; } identity End.DT4 { base srv6-endpoint-type; description "Endpoint with decapsulation and specific IPv4 table lookup"; reference "draft-filsfils-spring-srv6-network-programming-04"; } identity End.DT46 { base srv6-endpoint-type; description "Endpoint with decapsulation and specific IP (IPv4 or IPv6) table lookup"; reference "draft-filsfils-spring-srv6-network-programming-04"; } identity End.DX2 { base srv6-endpoint-type; description "Endpoint with decapsulation and Layer-2 cross-connect to an L2 interface"; reference "draft-filsfils-spring-srv6-network-programming-04"; } identity End.DX2V { base srv6-endpoint-type; description "Endpoint with decapsulation and specific VLAN L2 table lookup"; reference "draft-filsfils-spring-srv6-network-programming-04"; } identity End.DT2U { base srv6-endpoint-type; description Raza, et al. Expires September 6, 2018 [Page 20] Internet-Draft YANG Data Model for SRv6 March 2018 "Endpoint with decapsulation and specific unicast MAC L2 table lookup"; reference "draft-filsfils-spring-srv6-network-programming-04"; } identity End.DT2M { base srv6-endpoint-type; description "Endpoint with decapsulation and specific L2 table flooding"; reference "draft-filsfils-spring-srv6-network-programming-04"; } identity End.OTP { base srv6-endpoint-type; description "Endpoint for OAM operation of timestamp and punt"; reference "draft-filsfils-spring-srv6-network-programming-04"; } identity End.S { base srv6-endpoint-type; description "Endpoint in search of a target in table TE"; reference "draft-filsfils-spring-srv6-network-programming-04"; } /* Endpoints defined under draft-xuclad-spring-sr-service-chaining */ identity End.AS { base srv6-endpoint-type; description "Service-Chaining Static proxy for inner type (Ethernet, IPv4 or IPv6)"; reference "draft-xuclad-spring-sr-service-chaining-01"; } identity End.AD { base srv6-endpoint-type; description "Service-Chaining Dynamic proxy for inner type (Ethernet, IPv4 or IPv6)"; reference Raza, et al. Expires September 6, 2018 [Page 21] Internet-Draft YANG Data Model for SRv6 March 2018 "draft-xuclad-spring-sr-service-chaining-01"; } identity End.ASM { base srv6-endpoint-type; description "Service-Chaining Shared memory SR proxy for inner type (Ethernet, IPv4 or IPv6)"; reference "draft-xuclad-spring-sr-service-chaining-01"; } identity End.AM { base srv6-endpoint-type; description "Service-Chaining Masquerading SR proxy"; reference "draft-xuclad-spring-sr-service-chaining-01"; } /* Endpoints defined under draft-ietf-dmm-srv6-mobile-uplane */ identity End.MAP { base srv6-endpoint-type; description "DMM End.MAP"; reference "draft-ietf-dmm-srv6-mobile-uplane-01"; } identity End.M.GTP6.UP { base srv6-endpoint-type; description "DMM End.M.GTP6.UP"; reference "draft-ietf-dmm-srv6-mobile-uplane-01"; } identity End.M.GTP6.DN { base srv6-endpoint-type; Raza, et al. Expires September 6, 2018 [Page 22] Internet-Draft YANG Data Model for SRv6 March 2018 description "DMM End.M.GTP6.DN"; reference "draft-ietf-dmm-srv6-mobile-uplane-01"; } identity End.M.GTP4.DN { base srv6-endpoint-type; description "DMM End.M.GTP4.DN"; reference "draft-ietf-dmm-srv6-mobile-uplane-01"; } identity End.Limit { base srv6-endpoint-type; description "DMM End.Limit"; reference "draft-ietf-dmm-srv6-mobile-uplane-01"; } typedef srv6-transit-type { type enumeration { /* draft-filsfils-spring-srv6-network-programming-04 */ enum T { value 1; description "Transit behavior"; } enum T.Insert { description "Transit behavior with insertion of an SRv6 policy"; } enum T.Insert.Red { description "Transit behavior with reduced insertion of an SRv6 policy"; } enum T.Encaps { description "Transit behavior with encap of an SRv6 policy"; } enum T.Encaps.Red { description "Transit behavior with reduced encap of an SRv6 policy"; } enum T.Encaps.L2 { description "T.Encaps behavior on the received L2 frame"; } enum T.Encaps.L2.Red { description "T.Encaps.Red behavior on the received L2 frame"; } } description "SRv6 Transit behavior types"; Raza, et al. Expires September 6, 2018 [Page 23] Internet-Draft YANG Data Model for SRv6 March 2018 } typedef srv6-security-rule-type { type enumeration { /* draft-filsfils-spring-srv6-network-programming-04 */ enum SEC1 { value 1; description "Security rule SEC1"; } enum SEC2 { description "Security rule SEC2"; } enum SEC3 { description "Security rule SEC3"; } enum SEC4 { description "Security rule SEC4"; } } description "SRv6 Security rule types"; } typedef srv6-counter-type { type enumeration { /* draft-filsfils-spring-srv6-network-programming-04 */ enum CNT1 { value 1; description "CNT1"; } enum CNT2 { description "CNT2"; } enum CNT3 { description "CNT3"; } } description "SRv6 counter types"; } typedef srv6-sid { type inet:ipv6-prefix; description "This type defines a SID value in SRv6"; } typedef srv6-func-opcode { type uint32; description "This is a typedef for SID FUNC's opcode type"; } typedef srv6-func-opcode-reserved { type uint32 { range "1 .. 63"; } description "This is a typedef for SID FUNC's reserved opcode type"; } typedef srv6-func-opcode-unreserved { type uint32 { Raza, et al. Expires September 6, 2018 [Page 24] Internet-Draft YANG Data Model for SRv6 March 2018 range "64 .. max"; } description "This is a typedef for SID FUNC's allocatable (unreserved) opcode type"; } typedef srv6-func-opcode-reserved-type { type enumeration { enum invalid { value 0; description "Invalid opcode"; } } description "SRv6 SID FUNC Reserved Opcodes"; } typedef srv6-locator-len { type uint8 { range "32 .. 96"; } description "This type defines an SRv6 locator len with range constraints"; } typedef srv6-sid-pfxlen { type uint8 { range "33 .. 128"; } default 128; description "This type defines a SID prefixlen with range constraints"; } typedef sid-alloc-type { type enumeration { enum Dynamic { description "SID allocated dynamically."; } enum Explicit { description "SID allocated with explicit (static) value"; } } description "Types of sid allocation used."; } identity srv6-sid-owner-type { Raza, et al. Expires September 6, 2018 [Page 25] Internet-Draft YANG Data Model for SRv6 March 2018 description "Base identity from which SID owner types are derived."; } identity isis { base srv6-sid-owner-type; description "ISIS"; } identity ospfv3 { base srv6-sid-owner-type; description "OSPFv3"; } identity bgp { base srv6-sid-owner-type; description "BGP"; } identity evpn { base srv6-sid-owner-type; description "EVPN"; } identity sr-policy { base srv6-sid-owner-type; description "SR Policy"; } identity service-function { base srv6-sid-owner-type; description "SF"; } // TODO: Rtg module ? typedef table-id { type uint32; description "Routing Table Id"; } typedef srv6-status-type { type enumeration { enum up { value 1; description "State is Up"; } enum down { description "State is Down"; } } description "Status type"; Raza, et al. Expires September 6, 2018 [Page 26] Internet-Draft YANG Data Model for SRv6 March 2018 } typedef srv6-nexthop-type { type enumeration { enum ipv4 { value 1; description "IPv4 next-hop"; } enum ipv6 { description "IPv6 next-hop"; } enum mpls { description "MPLS next-hop"; } enum l2 { description "L2 next-hop"; } } description "Forwarding Next-hop type"; } } // module Figure 5: ietf-srv6-types.yang 6.2. SRv6 Base file "ietf-srv6-base@2018-03-01.yang" --> module ietf-srv6-base { namespace "urn:ietf:params:xml:ns:yang:ietf-srv6-base"; prefix srv6; import ietf-interfaces { prefix "if"; } import ietf-inet-types { prefix inet; } import ietf-yang-types { prefix "yang"; } import ietf-routing-types { prefix "rt-types"; } Raza, et al. Expires September 6, 2018 [Page 27] Internet-Draft YANG Data Model for SRv6 March 2018 import ietf-routing { prefix "rt"; } import ietf-srv6-types { prefix srv6-types; } organization "IETF SPRING Working Group"; contact "WG Web: WG List: Editor: Kamran Raza Editor: Jaganbabu Rajamanickam Editor: Xufeng Liu Editor: Zhibo Hu Editor: Iftekhar Hussain Editor: Himanshu Shah Editor: Daniel Voyer Editor: Hani Elmalky Editor: Satoru Matsushima Editor: Katsuhiro Horiba Editor: Ahmed AbdelSalam "; Raza, et al. Expires September 6, 2018 [Page 28] Internet-Draft YANG Data Model for SRv6 March 2018 description "This YANG module defines the essential elements for the management of Segment-Routing with IPv6 dataplane (SRv6). Copyright (c) 2017 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 Simplified BSD License set forth in Section 4.c of the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info)."; reference "RFC XXXX"; revision 2018-03-01 { description "Updated to align with SRv6 network programming draft rev 04"; reference "RFC XXXX: YANG Data Model for SRv6"; } revision 2017-11-12 { description "Initial revision."; reference "RFC XXXX: YANG Data Model for SRv6"; } /* * Common */ grouping path-attrs-cmn { description "Path properties -common for v4/v6"; leaf weight { type uint32; description "This value is used to compute a loadshare to perform un-equal load balancing when multiple outgoing path(s) are specified. A share is computed as a ratio of this number to the total under all configured path(s)."; } leaf role { Raza, et al. Expires September 6, 2018 [Page 29] Internet-Draft YANG Data Model for SRv6 March 2018 type enumeration { enum PRIMARY { description "Path as primary traffic carrying"; } enum BACKUP { description "Path acts as a backup"; } enum PRIMARY_AND_BACKUP { description "Path acts as primary and backup simultaneously"; } } description "The path role"; } leaf backup-path-index { type uint8; description "Index of the protecting (backup) path"; } } grouping path-out-sids { description "Grouping for path's SID stack"; list out-sid { key "sid"; description "Out SID"; leaf sid { type srv6-types:srv6-sid; description "SID value"; } } } grouping path-out-labels { description "Grouping for path's label stack"; list out-label { key "label"; description "Out label"; leaf label { type rt-types:mpls-label; description "Label value"; } } } /* * Config and State */ Raza, et al. Expires September 6, 2018 [Page 30] Internet-Draft YANG Data Model for SRv6 March 2018 grouping srv6-encap { description "Grouping for encap param config."; container encapsulation { description "Configure encapsulation related parameters"; leaf source-address { type inet:ipv6-address; description "Specify a source address (for T.Encap). The address must locally exists and be routable"; } leaf ip-ttl-propagation { type boolean; default false; description "IP TTL propagation from encapsulated packet to encapsulating outer IPv6 header. When configured on decapsulation side, this refers to propagating IP TTL from outer IPv6 header to inner header after decap"; } } } grouping srv6-locator-state { description "SRv6 grouping Locastateor "; leaf operational-status { type srv6-types:srv6-status-type; config false; description "Indicates whether locator state is UP"; } leaf is-in-address-conflict { type boolean; config false; description "Indicates whether locator address conflicts with some other IPv6 address on the box"; } } grouping srv6-locators { description "SRv6 locator grouping"; container locators { description "SRv6 locators"; list locator { key "name"; description "Configure a SRv6 locator"; Raza, et al. Expires September 6, 2018 [Page 31] Internet-Draft YANG Data Model for SRv6 March 2018 leaf name { type string; description "Locator name"; } leaf enable { type boolean; default false; description "Enable a SRv6 locator"; } leaf is-default { type boolean; mandatory true; description "Indicates if the locator is a default locator"; } container prefix { description "Specify locator prefix value"; leaf address { type inet:ipv6-address; mandatory true; description "IPv6 address"; } leaf length { type srv6-types:srv6-locator-len; mandatory true; description "Locator (prefix) length"; } } uses srv6-locator-state; } } } grouping srv6-stats-in { description "Grouping for inbound stats"; leaf in-pkts { type yang:counter64; description "A cumulative counter of the total number of packets received"; } leaf in-octets { type yang:counter64; description "A cumulative counter of the total bytes received."; } Raza, et al. Expires September 6, 2018 [Page 32] Internet-Draft YANG Data Model for SRv6 March 2018 } grouping srv6-stats-out { description "Grouping for inbound stats"; leaf out-pkts { type yang:counter64; description "A cumulative counter of the total number of packets transmitted"; } leaf out-octets { type yang:counter64; description "A cumulative counter of the total bytes transmitted."; } } grouping path-out-sids-choice { description "Grouping for Out-SID choices"; choice encap-type { description "Out-SID encap-based choice"; case srv6 { uses path-out-sids; } case mpls { uses path-out-labels; } } } grouping local-sid-fwd-state { description "SRv6 local-SID forwarding state grouping"; container forwarding { description "SRv6 local-SID forwarding state"; leaf is-installed { type boolean; description "Indicates whether SID is installed in forwarding"; } leaf next-hop-type { type srv6-types:srv6-nexthop-type; description "Forwarding next-hop types"; } container paths { Raza, et al. Expires September 6, 2018 [Page 33] Internet-Draft YANG Data Model for SRv6 March 2018 when "../is-installed = 'true'" { description "This container is valid only when the local-SID is installed in forwarding"; } list path { key path-index; description "The list of paths associated with the SID"; leaf path-index { type uint8; description "Index of the path"; } container l2 { when "../../../next-hop-type = 'l2'" { description "This container is valid only for L2 type of NHs"; } leaf interface { type if:interface-ref; description "The outgoing Layer2 interface"; } description "L2 information"; } container l3 { when "../../../next-hop-type != 'l2'" { description "This container is valid only for L3 type of NHs"; } leaf interface { type if:interface-ref; description "The outgoing Layer3 interface"; } leaf next-hop { type inet:ip-address; description "The IP address of the next-hop"; } uses path-attrs-cmn; description "L3 information"; } uses path-out-sids-choice; } Raza, et al. Expires September 6, 2018 [Page 34] Internet-Draft YANG Data Model for SRv6 March 2018 description "Forwarding paths"; } } } grouping srv6-state-sid { description "SRv6 SID state grouping"; container local-sids { config false; description "Local-SID state"; container counters { description "SRv6 counters"; container cnt3 { description "Counts SRv6 traffic received/dropped on local prefix not instantiated as local-SID"; uses srv6-stats-in; } } list local-sid { key "sid"; description "Per-localSID Counters"; leaf sid { type srv6-types:srv6-sid; description "Local SID value"; } uses srv6-locator-ref; leaf is-reserved { type boolean; description "Set to true if SID comes from reserved pool"; } leaf end-behavior-type { type identityref { base srv6-types:srv6-endpoint-type; } description "Type of SRv6 end behavior."; } leaf alloc-type { type srv6-types:sid-alloc-type; description "Type of sid allocation."; Raza, et al. Expires September 6, 2018 [Page 35] Internet-Draft YANG Data Model for SRv6 March 2018 } list owner { key "type instance"; description "SID Owner clients"; leaf type { type identityref { base srv6-types:srv6-sid-owner-type; } description "SID owner/client type"; } leaf instance { type string; description "Client instance"; } leaf is-winner { type boolean; description "Is this client/owner the winning in terms of forwarding"; } } uses local-sid-fwd-state; container counters { description "SRv6 per local-SID counters"; container cnt1 { description "Counts SRv6 traffic received on local-SID prefix and processed successfully"; uses srv6-stats-in; } } } } } grouping srv6-support-ends { description "SRv6 End behavior support grouping"; list end-behavior { key "type"; description "End behavior support"; leaf type { type identityref { base srv6-types:srv6-endpoint-type; } description "End behavior (End*) type"; } Raza, et al. Expires September 6, 2018 [Page 36] Internet-Draft YANG Data Model for SRv6 March 2018 leaf supported { type boolean; mandatory true; description "True if supported"; } } } grouping srv6-support-transits { description "SRv6 Transit behavior support grouping"; list transit-behavior { key "type"; description "Transit behavior support"; leaf type { type srv6-types:srv6-transit-type; description "Transit behavior (T*) type"; } leaf supported { type boolean; mandatory true; description "True if supported"; } } } grouping srv6-support-signaled { description "SRv6 signaled parameter support grouping"; container signaled-parameters { description "SRv6 signaled parameter support"; leaf max-sl { type uint8; //mandatory true; description "Maximum value of the SL field in the SRH of a received packet before applying the function associated with a SID"; } leaf max-end-pop-srh { type uint8; //mandatory true; description "Maximum number of SIDs in the top SRH in an SRH stack to which the router can apply PSP or USP flavors"; } leaf max-t_insert { Raza, et al. Expires September 6, 2018 [Page 37] Internet-Draft YANG Data Model for SRv6 March 2018 type uint8; //mandatory true; description "Maximum number of SIDs that can be inserted as part of the T.insert behavior"; } leaf max-t_encap { type uint8; //mandatory true; description "Maximum number of SIDs that can be inserted as part of the T.Encap behavior"; } leaf max-end_d { type uint8; //mandatory true; description "Maximum number of SIDs in an SRH when applying End.DX6 and End.DT6 functions"; } } } grouping srv6-support-security-rules { description "SRv6 Security rules grouping"; list security-rule { key "type"; description "Security rule support"; leaf type { type srv6-types:srv6-security-rule-type; description "Security rule type"; } leaf supported { type boolean; mandatory true; description "True if supported"; } } } grouping srv6-support-counters { description "SRv6 Counters grouping"; list counters { key "type"; description "SRv6 counter support"; leaf type { type srv6-types:srv6-counter-type; Raza, et al. Expires September 6, 2018 [Page 38] Internet-Draft YANG Data Model for SRv6 March 2018 description "Counter type"; } leaf supported { type boolean; mandatory true; description "True if supported"; } } } grouping srv6-state-capabilities { description "SRv6 node capabilities grouping"; container node-capabilities { config false; description "Node's SRv6 capabilities"; uses srv6-support-ends; uses srv6-support-transits; uses srv6-support-signaled; uses srv6-support-security-rules; uses srv6-support-counters; } } augment "/rt:routing" { description "This augments routing-instance configuration with segment-routing SRv6."; container srv6 { description "Segment Routing with IPv6 dataplane"; /* config */ leaf enable { type boolean; default false; description "Enable SRv6"; } uses srv6-encap; uses srv6-locators; uses srv6-state-capabilities; uses srv6-state-sid; } } /* Notifications */ grouping srv6-locator-ref { Raza, et al. Expires September 6, 2018 [Page 39] Internet-Draft YANG Data Model for SRv6 March 2018 description "An absolute reference to an SRv6 locator"; leaf locator-ref { type leafref { path "/rt:routing/srv6:srv6/srv6:locators/srv6:locator/srv6:name"; } description "Reference to a SRv6 locator."; } } notification srv6-locator-status-event { description "Notification event for a change of SRv6 locator operational status."; leaf operational-status { type srv6-types:srv6-status-type; description "Operational status"; } uses srv6-locator-ref; } notification srv6-sid-collision-event { description "Notification event for an SRv6 SID collision - i.e., attempt to bind an already bound SID to a new context"; leaf sid { type srv6-types:srv6-sid; description "SRv6 SID"; } container existing { description "Current assignment / bind"; leaf end-behavior-type { type identityref { base srv6-types:srv6-endpoint-type; } description "End type"; } // TODO: More } container requested { description "Requested assignment / bind"; leaf end-behavior-type { type identityref { base srv6-types:srv6-endpoint-type; } description "End type"; } Raza, et al. Expires September 6, 2018 [Page 40] Internet-Draft YANG Data Model for SRv6 March 2018 } } } // module Figure 6: ietf-srv6-base.yang 6.3. SRv6 Static file "ietf-srv6-static@2018-03-01.yang" --> module ietf-srv6-static { namespace "urn:ietf:params:xml:ns:yang:ietf-srv6-static"; prefix srv6-static; import ietf-interfaces { prefix "if"; } import ietf-inet-types { prefix inet; } import ietf-routing { prefix "rt"; } import ietf-srv6-types { prefix srv6-types; } import ietf-srv6-base { prefix srv6; } organization "IETF SPRING Working Group"; contact "WG Web: WG List: Raza, et al. Expires September 6, 2018 [Page 41] Internet-Draft YANG Data Model for SRv6 March 2018 Editor: Kamran Raza Editor: Jaganbabu Rajamanickam Editor: Xufeng Liu Editor: Zhibo Hu Editor: Iftekhar Hussain Editor: Himanshu Shah Editor: Daniel Voyer Editor: Hani Elmalky Editor: Satoru Matsushima Editor: Katsuhiro Horiba Editor: Ahmed AbdelSalam "; description "This YANG module defines the essential elements for the management of Static application for Segment-Routing with IPv6 dataplane (SRv6). Copyright (c) 2017 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 Simplified BSD License set forth in Section 4.c of the IETF Trust's Legal Provisions Relating to IETF Documents Raza, et al. Expires September 6, 2018 [Page 42] Internet-Draft YANG Data Model for SRv6 March 2018 (http://trustee.ietf.org/license-info)."; reference "RFC XXXX"; revision 2018-03-01 { description "Updated to align with SRv6 network programming draft rev 04"; reference "RFC XXXX: YANG Data Model for SRv6"; } revision 2017-11-12 { description "Initial revision."; reference "RFC XXXX: YANG Data Model for SRv6"; } /* * Config and State */ grouping path-attrs-v6 { description "IPv6 Path properties"; leaf interface { type if:interface-ref; description "The outgoing interface"; } leaf next-hop { type inet:ipv6-address; description "The IP address of the next-hop"; } uses srv6:path-attrs-cmn; } grouping path-attrs-v4 { description "IPv4 Path properties"; leaf interface { type if:interface-ref; description "The outgoing interface"; } Raza, et al. Expires September 6, 2018 [Page 43] Internet-Draft YANG Data Model for SRv6 March 2018 leaf next-hop { type inet:ipv4-address; description "The IP address of the next-hop"; } uses srv6:path-attrs-cmn; } grouping path-attrs-mpls { description "MPLS Path properties"; leaf interface { type if:interface-ref; description "The outgoing interface"; } leaf next-hop { type inet:ip-address; description "The IP address of the next-hop"; } uses srv6:path-attrs-cmn; } grouping multi-paths-v6 { description "Multipath grouping"; container paths { description "List of outgoing paths"; list path { key path-index; description "The list of paths associated with the SID"; leaf path-index { type uint8; description "Index of the path"; } uses path-attrs-v6; container encap { description "Encapsulation on path"; uses srv6:path-out-sids; } } } } Raza, et al. Expires September 6, 2018 [Page 44] Internet-Draft YANG Data Model for SRv6 March 2018 grouping multi-paths-v4 { description "Multipath grouping"; container paths { description "List of outgoing paths"; list path { key path-index; description "The list of paths associated with the SID"; leaf path-index { type uint8; description "Index of the path"; } uses path-attrs-v4; container encap { description "Encapsulation on path"; uses srv6:path-out-sids; } } } } grouping multi-paths-mpls { description "Multipath grouping"; container paths { description "List of outgoing paths"; list path { key path-index; description "The list of paths associated with the SID"; leaf path-index { type uint8; description "Index of the path"; } uses path-attrs-mpls; container encap { description "Encapsulation on path"; uses srv6:path-out-labels; } } } } grouping srv6-sid-config { description Raza, et al. Expires September 6, 2018 [Page 45] Internet-Draft YANG Data Model for SRv6 March 2018 "Configuration parameters relating to SRv6 sid."; leaf opcode { type srv6-types:srv6-func-opcode-unreserved; description "SRv6 function opcode."; } leaf end-behavior-type { type identityref { base srv6-types:srv6-endpoint-type; } mandatory true; description "Type of SRv6 end behavior."; } container end { when "../end-behavior-type = 'End'" { description "This container is valid only when the user chooses End behavior (variant: no PSP, no USP)."; } description "The Endpoint function is the most basic function. FIB lookup on updated DA and forward accordingly to the matched entry. This is the SRv6 instantiation of a Prefix SID (variant: no PSP, no USP)"; } container end_psp { when "../end-behavior-type = 'End_PSP'" { description "This container is valid only when the user chooses End behavior (variant: PSP only)."; } description "The Endpoint function is the most basic function. FIB lookup on updated DA and forward accordingly to the matched entry. This is the SRv6 instantiation of a Prefix SID (variant: PSP only)"; } container end_usp { when "../end-behavior-type = 'End_USP'" { Raza, et al. Expires September 6, 2018 [Page 46] Internet-Draft YANG Data Model for SRv6 March 2018 description "This container is valid only when the user chooses End behavior (variant: USP only)."; } description "The Endpoint function is the most basic function. FIB lookup on updated DA and forward accordingly to the matched entry. This is the SRv6 instantiation of a Prefix SID (variant: USP only)"; } container end_psp_usp { when "../end-behavior-type = 'End_PSP_USP'" { description "This container is valid only when the user chooses End behavior (variant: PSP/USP)."; } description "The Endpoint function is the most basic function. FIB lookup on updated DA and forward accordingly to the matched entry. This is the SRv6 instantiation of a Prefix SID (variant: PSP/USP)"; } container end-t { when "../end-behavior-type = 'End.T'" { description "This container is valid only when the user chooses End.T behavior (variant: no PSP, no USP)."; } description "Endpoint with specific IPv6 table lookup (variant: no PSP, no USP). Lookup the next segment in IPv6 table T associated with the SID and forward via the matched table entry. The End.T is used for multi-table operation in the core."; // TODO presence "Mandatory child only if container is present"; leaf lookup-table-ipv6 { type srv6-types:table-id; mandatory true; description "Table Id for lookup on updated DA (next segment)"; Raza, et al. Expires September 6, 2018 [Page 47] Internet-Draft YANG Data Model for SRv6 March 2018 } } container end-t_psp { when "../end-behavior-type = 'End.T_PSP'" { description "This container is valid only when the user chooses End.T behavior (variant: PSP only)."; } description "Endpoint with specific IPv6 table lookup (variant: PSP only). Lookup the next segment in IPv6 table T associated with the SID and forward via the matched table entry. The End.T is used for multi-table operation in the core."; // TODO presence "Mandatory child only if container is present"; leaf lookup-table-ipv6 { type srv6-types:table-id; mandatory true; description "Table Id for lookup on updated DA (next segment)"; } } container end-t_usp { when "../end-behavior-type = 'End.T_USP'" { description "This container is valid only when the user chooses End.T behavior (variant: USP only)."; } description "Endpoint with specific IPv6 table lookup (variant: USP only). Lookup the next segment in IPv6 table T associated with the SID and forward via the matched table entry. The End.T is used for multi-table operation in the core."; // TODO presence "Mandatory child only if container is present"; leaf lookup-table-ipv6 { type srv6-types:table-id; mandatory true; description Raza, et al. Expires September 6, 2018 [Page 48] Internet-Draft YANG Data Model for SRv6 March 2018 "Table Id for lookup on updated DA (next segment)"; } } container end-t_psp_usp { when "../end-behavior-type = 'End.T_PSP_USP'" { description "This container is valid only when the user chooses End.T behavior (variant: USP/PSP)."; } description "Endpoint with specific IPv6 table lookup (variant: USP/PSP). Lookup the next segment in IPv6 table T associated with the SID and forward via the matched table entry. The End.T is used for multi-table operation in the core."; // TODO presence "Mandatory child only if container is present"; leaf lookup-table-ipv6 { type srv6-types:table-id; mandatory true; description "Table Id for lookup on updated DA (next segment)"; } } container end-x { when "../end-behavior-type = 'End.X'" { description "This container is valid only when the user chooses End.X behavior (variant: no USP/PSP)"; } description "Endpoint with cross-connect to an array of layer-3 adjacencies (variant: no USP/PSP). Forward to layer-3 adjacency bound to the SID S. The End.X function is required to express any traffic-engineering policy."; leaf protected { type boolean; default false; description "Is Adj-SID protected?"; } uses multi-paths-v6; Raza, et al. Expires September 6, 2018 [Page 49] Internet-Draft YANG Data Model for SRv6 March 2018 } container end-x_psp { when "../end-behavior-type = 'End.X_PSP'" { description "This container is valid only when the user chooses End.X behavior (variant: PSP only)"; } description "Endpoint with cross-connect to an array of layer-3 adjacencies (variant: PSP only). Forward to layer-3 adjacency bound to the SID S. The End.X function is required to express any traffic-engineering policy."; leaf protected { type boolean; default false; description "Is Adj-SID protected?"; } uses multi-paths-v6; } container end-x_usp { when "../end-behavior-type = 'End.X_USP'" { description "This container is valid only when the user chooses End.X behavior (variant: USP only)"; } description "Endpoint with cross-connect to an array of layer-3 adjacencies (variant: USP only). Forward to layer-3 adjacency bound to the SID S. The End.X function is required to express any traffic-engineering policy."; leaf protected { type boolean; default false; description "Is Adj-SID protected?"; } uses multi-paths-v6; } container end-x_psp_usp { when "../end-behavior-type = 'End.X_PSP_USP'" { Raza, et al. Expires September 6, 2018 [Page 50] Internet-Draft YANG Data Model for SRv6 March 2018 description "This container is valid only when the user chooses End.X behavior (variant: PSP/USP)"; } description "Endpoint with cross-connect to an array of layer-3 adjacencies (variant: PSP/USP). Forward to layer-3 adjacency bound to the SID S. The End.X function is required to express any traffic-engineering policy."; leaf protected { type boolean; default false; description "Is Adj-SID protected?"; } uses multi-paths-v6; } container end-b6 { when "../end-behavior-type = 'End.B6'" { description "This container is valid only when the user chooses End.B6 behavior."; } description "Endpoint bound to an SRv6 Policy. Insert SRH based on the policy and forward the packet toward the first hop configured in the policy. This is the SRv6 instantiation of a Binding SID."; // TODO presence "Mandatory child only if container is present"; leaf policy-name { type string; mandatory true; description "SRv6 policy name."; } uses multi-paths-v6; } container end-b6-encaps { when "../end-behavior-type = 'End.B6.Encaps'" { description "This container is valid only when the user chooses Raza, et al. Expires September 6, 2018 [Page 51] Internet-Draft YANG Data Model for SRv6 March 2018 End_B6_Encaps behavior."; } description "This is a variation of the End.B6 behavior where the SRv6 Policy also includes an IPv6 Source Address. Insert SRH based on the policy and update the source IP and forward the packet toward the first hop configured in the policy. Instead of simply inserting an SRH with the policy (End.B6), this behavior also adds an outer IPv6 header."; // TODO presence "Mandatory child only if container is present"; leaf policy-name { type string; mandatory true; description "SRv6 policy name."; } leaf source-address { type inet:ipv6-address; mandatory true; description "IPv6 source address for Encap."; } uses multi-paths-v6; } container end-bm { when "../end-behavior-type = 'End.BM'" { description "This container is valid only when the user chooses End.BM behavior."; } description "Endpoint bound to an SR-MPLS Policy. push an MPLS label stack on the received packet and forward the according to Lable L1. This is an SRv6 instantiation of an SR-MPLS Binding SID."; // TODO presence "Mandatory child only if container is present"; leaf policy-name { type string; mandatory true; Raza, et al. Expires September 6, 2018 [Page 52] Internet-Draft YANG Data Model for SRv6 March 2018 description "SRv6 policy name"; } uses multi-paths-mpls; } container end-dx6 { when "../end-behavior-type = 'End.DX6'" { description "This container is valid only when the user chooses End.DX6 behavior."; } description "Endpoint with decapsulation and cross-connect to an array of IPv6 adjacencies. Pop the (outer) IPv6 header and its extension headers and forward to layer-3 adjacency bound to the SID S. The End.DX6 used in the L3VPN use-case."; uses multi-paths-v6; } container end-dx4 { when "../end-behavior-type = 'End.DX4'" { description "This container is valid only when the user chooses End.DX4 behavior."; } description "Endpoint with decapsulation and cross-connect to an array of IPv4 adjacencies. Pop the (outer) IPv6 header and its extension header and forward to layer-3 adjacency bound to the SID S. This would be equivalent to the per-CE VPN label in MPLS."; uses multi-paths-v4; } container end-dt6 { when "../end-behavior-type = 'End.DT6'" { description "This container is valid only when the user chooses End.DT6 behavior."; } description "Endpoint with decapsulation and specific IPv6 table lookup. Pop the (outer) IPv6 header and its extension headers. Raza, et al. Expires September 6, 2018 [Page 53] Internet-Draft YANG Data Model for SRv6 March 2018 Lookup the exposed inner IPv6 DA in IPv6 table T and forward via the matched table entry. End.DT6 function is used in L3VPN use-case."; // TODO presence "Mandatory child only if container is present"; leaf lookup-table-ipv6 { type srv6-types:table-id; mandatory true; description "IPv6 table"; } } container end-dt4 { when "../end-behavior-type = 'End.DT4'" { description "This container is valid only when the user chooses End.DT4 behavior."; } description "Endpoint with decapsulation and specific IPv4 table lookup. Pop the (outer) IPv6 header and its extension headers. Lookup the exposed inner IPv4 DA in IPv4 table T and forward via the matched table entry. This would be equivalent to the per-VRF VPN label in MPLS."; // TODO presence "Mandatory child only if container is present"; leaf lookup-table-ipv4 { type srv6-types:table-id; mandatory true; description "IPv4 table"; } } container end-dt46 { when "../end-behavior-type = 'End.DT46'" { description "This container is valid only when the user chooses End.DT46 behavior."; } description "Endpoint with decapsulation and specific IP table lookup. Depending on the protocol type (IPv4 or IPv6) of the inner ip packet and the specific VRF name forward the packet. Raza, et al. Expires September 6, 2018 [Page 54] Internet-Draft YANG Data Model for SRv6 March 2018 This would be equivalent to the per-VRF VPN label in MPLS."; // TODO presence "Mandatory child only if container is present"; leaf lookup-table-ipv4 { type srv6-types:table-id; mandatory true; description "IPv4 table"; } leaf lookup-table-ipv6 { type srv6-types:table-id; mandatory true; description "IPv6 table"; } } container end-dx2 { when "../end-behavior-type = 'End.DX2'" { description "This container is valid only when the user chooses End.DX2 behavior."; } description "This is an Endpoint with decapsulation and Layer-2 cross-connect to OIF. Pop the (outer) IPv6 header and its extension headers. Forward the resulting frame via OIF associated to the SID. The End.DX2 function is the L2VPN use-case"; container paths { description "List of outgoing paths"; leaf interface { type if:interface-ref; mandatory true; description "Layer-2 cross-connect to Out interface."; } } } /* TODO container end-dx2v { when "../end-behavior-type = 'End.DX2V'" { description "This container is valid only when the user chooses End.DX2V behavior."; } description Raza, et al. Expires September 6, 2018 [Page 55] Internet-Draft YANG Data Model for SRv6 March 2018 "Endpoint with decapsulation and specific VLAN L2 table lookup. Pop the (outer) IPv6 header and its extension headers lookup the exposed inner VLANs in L2 table T forward via the matched table entry. The End.DX2V is used for EVPN Flexible cross-connect use-cases"; leaf end-dx2v { type empty; description "End_DX2V behavior"; } } container end-dt2u { when "../end-behavior-type = 'End.DT2U'" { description "This container is valid only when the user chooses End.DT2U behavior."; } description "Endpoint with decapsulation and specific unicast MAC L2 table lookup. Pop the (outer) IPv6 header and its extension headers. Learn the exposed inner MAC SA in L2 table T. Lookup the exposed inner MAC DA in L2 table T. Forward via the matched T entry else to all L2OIF in T. The End.DT2U is used for EVPN Bridging unicast use cases"; leaf end-dt2u { type empty; description "End_DT2U behavior"; } } container end-dt2m { when "../end-behavior-type = 'End.DT2M'" { description "This container is valid only when the user chooses End.DT2M behavior."; } description "Endpoint with decapsulation and specific L2 table flooding. Pop the (outer) IPv6 header and its extension headers. Learn the exposed inner MAC SA in L2 table T. Forward on all L2OIF excluding the one specified in Arg.FE2. The End.DT2M is used for EVPN Bridging BUM use case with ESI filtering capability."; leaf end-dt2m { Raza, et al. Expires September 6, 2018 [Page 56] Internet-Draft YANG Data Model for SRv6 March 2018 type empty; description "End_DT2M behavior"; } } */ container end-otp { when "../end-behavior-type = 'End.OTP'" { description "This container is valid only when the user chooses End.OTP behavior."; } description "Endpoint for OAM with timestamp and punt behavior"; } } grouping srv6-static-cfg { description "Grouping configuration and operation for SRv6 sid."; list sid { key "opcode"; description "Local SID list"; uses srv6-sid-config; } } augment "/rt:routing/srv6:srv6/srv6:locators/srv6:locator" { description "This augments locator leaf withing SRv6."; container static { description "Static SRv6"; /* Local SIDs */ container local-sids { description "SRv6-static local-SIDs"; uses srv6-static-cfg; /* no state for now; SID state accessible through base model */ } } } Raza, et al. Expires September 6, 2018 [Page 57] Internet-Draft YANG Data Model for SRv6 March 2018 } // module Figure 7: ietf-srv6-static.yang 7. Security Considerations The configuration, state, and notification data defined using YANG data models in this document are likely to be accessed via the protocols such as NETCONF [RFC6241] etc. Hence, YANG implementations MUST comply with the security requirements specified in section 15 of [RFC6020]. Additionally, NETCONF implementations MUST comply with the security requirements specified in sections 2.2, 2.3 and 9 of [RFC6241] as well as section 3.7 of [RFC6536]. 8. IANA Considerations None 9. Acknowledgments This draft is defining the similar YANG data model as [I-D.hu-spring-srv6-yang]. The authors of that draft have agreed to join this draft. The authors would like to acknowledge Darren Dukes, Les Ginsberge, and Ahmed Bashandy for their input and review. 10. References 10.1. Normative References [I-D.filsfils-spring-srv6-network-programming] Filsfils, C., Leddy, J., daniel.voyer@bell.ca, d., daniel.bernier@bell.ca, d., Steinberg, D., Raszuk, R., Matsushima, S., Lebrun, D., Decraene, B., Peirens, B., Salsano, S., Naik, G., Elmalky, H., Jonnalagadda, P., Sharif, M., Ayyangar, A., Mynam, S., Henderickx, W., Bashandy, A., Raza, K., Dukes, D., Clad, F., and P. Camarillo, "SRv6 Network Programming", draft-filsfils- spring-srv6-network-programming-03 (work in progress), December 2017. Raza, et al. Expires September 6, 2018 [Page 58] Internet-Draft YANG Data Model for SRv6 March 2018 [I-D.ietf-netmod-revised-datastores] Bjorklund, M., Schoenwaelder, J., Shafer, P., Watsen, K., and R. Wilton, "Network Management Datastore Architecture", draft-ietf-netmod-revised-datastores-10 (work in progress), January 2018. [I-D.ietf-netmod-rfc6087bis] Bierman, A., "Guidelines for Authors and Reviewers of YANG Data Model Documents", draft-ietf-netmod-rfc6087bis-18 (work in progress), February 2018. [I-D.ietf-spring-segment-routing] Filsfils, C., Previdi, S., Ginsberg, L., Decraene, B., Litkowski, S., and R. Shakir, "Segment Routing Architecture", draft-ietf-spring-segment-routing-15 (work in progress), January 2018. [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . [RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for the Network Configuration Protocol (NETCONF)", RFC 6020, DOI 10.17487/RFC6020, October 2010, . [RFC6241] Enns, R., Ed., Bjorklund, M., Ed., Schoenwaelder, J., Ed., and A. Bierman, Ed., "Network Configuration Protocol (NETCONF)", RFC 6241, DOI 10.17487/RFC6241, June 2011, . [RFC6536] Bierman, A. and M. Bjorklund, "Network Configuration Protocol (NETCONF) Access Control Model", RFC 6536, DOI 10.17487/RFC6536, March 2012, . 10.2. Informative References [I-D.bashandy-isis-srv6-extensions] Ginsberg, L., Bashandy, A., Filsfils, C., and B. Decraene, "IS-IS Extensions to Support Routing over IPv6 Dataplane", draft-bashandy-isis-srv6-extensions-01 (work in progress), September 6017. Raza, et al. Expires September 6, 2018 [Page 59] Internet-Draft YANG Data Model for SRv6 March 2018 [I-D.dawra-idr-srv6-vpn] Dawra, G., Filsfils, C., Dukes, D., Brissette, P., Camarillo, P., Leddy, J., daniel.voyer@bell.ca, d., daniel.bernier@bell.ca, d., Steinberg, D., Raszuk, R., Decraene, B., and S. Matsushima, "BGP Signaling of IPv6- Segment-Routing-based VPN Networks", draft-dawra-idr- srv6-vpn-03 (work in progress), December 2017. [I-D.filsfils-spring-segment-routing-policy] Filsfils, C., Sivabalan, S., Raza, K., Liste, J., Clad, F., Talaulikar, K., Ali, Z., Hegde, S., daniel.voyer@bell.ca, d., Lin, S., bogdanov@google.com, b., Krol, P., Horneffer, M., Steinberg, D., Decraene, B., Litkowski, S., and P. Mattes, "Segment Routing Policy for Traffic Engineering", draft-filsfils-spring-segment- routing-policy-05 (work in progress), February 2018. [I-D.hu-spring-srv6-yang] Li, Z., Matsushima, S., and K. Horiba, "YANG Data Model for SRv6", draft-hu-spring-srv6-yang-00 (work in progress), October 2017. [I-D.ietf-6man-segment-routing-header] Previdi, S., Filsfils, C., Raza, K., Dukes, D., Leddy, J., Field, B., daniel.voyer@bell.ca, d., daniel.bernier@bell.ca, d., Matsushima, S., Leung, I., Linkova, J., Aries, E., Kosugi, T., Vyncke, E., Lebrun, D., Steinberg, D., and R. Raszuk, "IPv6 Segment Routing Header (SRH)", draft-ietf-6man-segment-routing-header-08 (work in progress), January 2018. [I-D.ietf-dmm-srv6-mobile-uplane] Matsushima, S., Filsfils, C., Kohno, M., daniel.voyer@bell.ca, d., and C. Perkins, "Segment Routing IPv6 for Mobile User-Plane", draft-ietf-dmm-srv6-mobile- uplane-00 (work in progress), November 2017. [I-D.ietf-spring-sr-yang] Litkowski, S., Qu, Y., Sarkar, P., and J. Tantsura, "YANG Data Model for Segment Routing", draft-ietf-spring-sr- yang-08 (work in progress), December 2017. [I-D.xuclad-spring-sr-service-chaining] Clad, F., Xu, X., Filsfils, C., daniel.bernier@bell.ca, d., Decraene, B., Ma, S., Yadlapalli, C., Henderickx, W., and S. Salsano, "Segment Routing for Service Chaining", draft-xuclad-spring-sr-service-chaining-00 (work in progress), January 2018. Raza, et al. Expires September 6, 2018 [Page 60] Internet-Draft YANG Data Model for SRv6 March 2018 Authors' Addresses Kamran Raza Cisco Systems, Inc. 2000 Innovation Drive Kanata, ON K2K-3E8 CA Email: skraza@cisco.com Jaganbabu Rajamanickam Cisco Systems, Inc. 2000 Innovation Drive Kanata, ON K2K-3E8 CA Email: jrajaman@cisco.com Xufeng Liu Jabil Email: Xufeng_Liu@jabil.com Zhibo Hu Huawei Technologies Email: huzhibo@huawei.com Iftekhar Hussain Infinera Corporation Email: IHussain@infinera.com Himanshu Shah Ciena Corporation Email: hshah@ciena.com Daniel Voyer Bell Canada Email: daniel.voyer@bell.ca Raza, et al. Expires September 6, 2018 [Page 61] Internet-Draft YANG Data Model for SRv6 March 2018 Hani Elmalky Ericsson Email: hani.elmalky@ericsson.com Satoru Matsushima SoftBank Email: satoru.matsushima@g.softbank.co.jp Katsuhiro Horiba SoftBank Email: katsuhiro.horiba@g.softbank.co.jp Ahmed AbdelSalam Gran Sasso Science Institute, Italy Email: ahmed.abdelsalam@gssi.it Raza, et al. 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