draft-ietf-ospf-yang-07.txt		draft-ietf-ospf-yang-08.txt
	Internet D. Yeung		Internet D. Yeung
	Internet-Draft Arrcus		Internet-Draft Arrcus
	Intended status: Informational Y. Qu		Intended status: Standards Track Y. Qu
	Expires: September 14, 2017 Huawei		Expires: January 3, 2018 Huawei
	J. Zhang		J. Zhang
	Juniper Networks		Juniper Networks
	I. Chen		I. Chen
	Jabil		Jabil
	A. Lindem		A. Lindem
	Cisco Systems		Cisco Systems
	March 13, 2017		July 2, 2017
	Yang Data Model for OSPF Protocol		Yang Data Model for OSPF Protocol
	draft-ietf-ospf-yang-07		draft-ietf-ospf-yang-08
	Abstract		Abstract
	This document defines a YANG data model that can be used to configure		This document defines a YANG data model that can be used to configure
	and manage OSPF.		and manage OSPF.
	Status of This Memo		Status of This Memo
	This Internet-Draft is submitted in full conformance with the		This Internet-Draft is submitted in full conformance with the
	provisions of BCP 78 and BCP 79.		provisions of BCP 78 and BCP 79.
	skipping to change at page 1, line 38 ¶		skipping to change at page 1, line 38 ¶
	Internet-Drafts are working documents of the Internet Engineering		Internet-Drafts are working documents of the Internet Engineering
	Task Force (IETF). Note that other groups may also distribute		Task Force (IETF). Note that other groups may also distribute
	working documents as Internet-Drafts. The list of current Internet-		working documents as Internet-Drafts. The list of current Internet-
	Drafts is at http://datatracker.ietf.org/drafts/current/.		Drafts is at http://datatracker.ietf.org/drafts/current/.
	Internet-Drafts are draft documents valid for a maximum of six months		Internet-Drafts are draft documents valid for a maximum of six months
	and may be updated, replaced, or obsoleted by other documents at any		and may be updated, replaced, or obsoleted by other documents at any
	time. It is inappropriate to use Internet-Drafts as reference		time. It is inappropriate to use Internet-Drafts as reference
	material or to cite them other than as "work in progress."		material or to cite them other than as "work in progress."
	This Internet-Draft will expire on September 14, 2017.		This Internet-Draft will expire on January 3, 2018.
	Copyright Notice		Copyright Notice
	Copyright (c) 2017 IETF Trust and the persons identified as the		Copyright (c) 2017 IETF Trust and the persons identified as the
	document authors. All rights reserved.		document authors. All rights reserved.
	This document is subject to BCP 78 and the IETF Trust's Legal		This document is subject to BCP 78 and the IETF Trust's Legal
	Provisions Relating to IETF Documents		Provisions Relating to IETF Documents
	(http://trustee.ietf.org/license-info) in effect on the date of		(http://trustee.ietf.org/license-info) in effect on the date of
	publication of this document. Please review these documents		publication of this document. Please review these documents
	skipping to change at page 2, line 14 ¶		skipping to change at page 2, line 14 ¶
	to this document. Code Components extracted from this document must		to this document. Code Components extracted from this document must
	include Simplified BSD License text as described in Section 4.e of		include Simplified BSD License text as described in Section 4.e of
	the Trust Legal Provisions and are provided without warranty as		the Trust Legal Provisions and are provided without warranty as
	described in the Simplified BSD License.		described in the Simplified BSD License.
	Table of Contents		Table of Contents
	1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 2		1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 2
	1.1. Requirements Language . . . . . . . . . . . . . . . . . . 3		1.1. Requirements Language . . . . . . . . . . . . . . . . . . 3
	2. Design of Data Model . . . . . . . . . . . . . . . . . . . . 3		2. Design of Data Model . . . . . . . . . . . . . . . . . . . . 3
	2.1. Overview . . . . . . . . . . . . . . . . . . . . . . . . 3		2.1. OSPF Operational State . . . . . . . . . . . . . . . . . 3
	2.2. OSPFv2 and OSPFv3 . . . . . . . . . . . . . . . . . . . . 5		2.2. Overview . . . . . . . . . . . . . . . . . . . . . . . . 3
	2.3. Optional Features . . . . . . . . . . . . . . . . . . . . 5		2.3. OSPFv2 and OSPFv3 . . . . . . . . . . . . . . . . . . . . 5
	2.4. Inheritance . . . . . . . . . . . . . . . . . . . . . . . 5		2.4. Optional Features . . . . . . . . . . . . . . . . . . . . 5
	2.5. OSPF Router Configuration . . . . . . . . . . . . . . . . 5		2.5. OSPF Router Configuration/Operational State . . . . . . . 5
	2.6. OSPF Instance Configuration . . . . . . . . . . . . . . . 6		2.6. OSPF Instance Configuration/Operational State . . . . . . 5
	2.7. OSPF Area Configuration . . . . . . . . . . . . . . . . . 7		2.7. OSPF Area Configuration/Operational State . . . . . . . . 8
	2.8. OSPF Interface Configuration . . . . . . . . . . . . . . 9		2.8. OSPF Interface Configuration/Operational State . . . . . 13
	2.9. OSPF notification . . . . . . . . . . . . . . . . . . . . 11		2.9. OSPF notification . . . . . . . . . . . . . . . . . . . . 16
	2.10. OSPF RPC Operations . . . . . . . . . . . . . . . . . . . 15		2.10. OSPF RPC Operations . . . . . . . . . . . . . . . . . . . 20
	3. OSPF Yang Module . . . . . . . . . . . . . . . . . . . . . . 15		3. OSPF Yang Module . . . . . . . . . . . . . . . . . . . . . . 20
	4. Security Considerations . . . . . . . . . . . . . . . . . . . 95		4. Security Considerations . . . . . . . . . . . . . . . . . . . 100
	5. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 95		5. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 101
	6. References . . . . . . . . . . . . . . . . . . . . . . . . . 96		6. References . . . . . . . . . . . . . . . . . . . . . . . . . 101
	6.1. Normative References . . . . . . . . . . . . . . . . . . 96		6.1. Normative References . . . . . . . . . . . . . . . . . . 101
	6.2. Informative References . . . . . . . . . . . . . . . . . 97		6.2. Informative References . . . . . . . . . . . . . . . . . 103
	Appendix A. Contributors' Addreses . . . . . . . . . . . . . . . 98		Appendix A. Contributors' Addreses . . . . . . . . . . . . . . . 104
	Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 98		Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 104
	1. Overview		1. Overview
	YANG [RFC6020] is a data definition language used to define the		YANG [RFC6020] is a data definition language used to define the
	contents of a conceptual data store that allows networked devices to		contents of a conceptual data store that allows networked devices to
	be managed using NETCONF [RFC6241]. YANG is proving relevant beyond		be managed using NETCONF [RFC6241]. YANG is proving relevant beyond
	its initial confines, as bindings to other interfaces (e.g., ReST)		its initial confines, as bindings to other interfaces (e.g., ReST)
	and encodings other than XML (e.g., JSON) are being defined.		and encodings other than XML (e.g., JSON) are being defined.
	Furthermore, YANG data models can be used as the basis for		Furthermore, YANG data models can be used as the basis for
	implementation of other interfaces, such as CLI and programmatic		implementation of other interfaces, such as CLI and programmatic
	APIs.		APIs.
	This document defines a YANG data model that can be used to configure		This document defines a YANG data model that can be used to configure
	and manage OSPF and it is an augmentation to the core routing data		and manage OSPF and it is an augmentation to the core routing data
	model. A core routing data model is defined in [RFC8022], and it		model. A core routing data model is defined in [RFC8022], and it
	provides the basis for the development of data models for routing		provides the basis for the development of data models for routing
	protocols. The interface data model is defined in [RFC7223] and is		protocols. The interface data model is defined in [RFC7223] and is
	used for referencing interfaces from the routing protocol. The key-		used for referencing interfaces from the routing protocol. The key-
	chain data model used for OSPF authentication is defined in		chain data model used for OSPF authentication is defined in [RFC8177]
			and provides both a reference to configured key-chains and an
	[I-D.ietf-rtgwg-yang-key-chain] and provides both a reference to		enumeration of cryptographic algorithms.
	configured key-chains and an enumeration of cryptographic algorithms.
	Both OSPFv2 [RFC2328] and OSPFv3 [RFC5340] are supported. In		Both OSPFv2 [RFC2328] and OSPFv3 [RFC5340] are supported. In
	addition to the core OSPF protocol, features described in other OSPF		addition to the core OSPF protocol, features described in other OSPF
	RFCs are also supported. These includes demand circuit [RFC1793],		RFCs are also supported. These includes demand circuit [RFC1793],
	traffic engineering [RFC3630], multiple address family [RFC5838],		traffic engineering [RFC3630], multiple address family [RFC5838],
	graceful restart [RFC3623] [RFC5187], NSSA [RFC3101], and OSPF(v3) as		graceful restart [RFC3623] [RFC5187], NSSA [RFC3101], and OSPF(v3) as
	a PE-CE Protocol [RFC4577], [RFC6565]. These non-core features are		a PE-CE Protocol [RFC4577], [RFC6565]. These non-core features are
	optional in the OSPF data model.		optional in the OSPF data model.
	1.1. Requirements Language		1.1. Requirements Language
	skipping to change at page 3, line 28 ¶		skipping to change at page 3, line 27 ¶
	The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",		The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
	"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this		"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
	document are to be interpreted as described in [RFC2119].		document are to be interpreted as described in [RFC2119].
	2. Design of Data Model		2. Design of Data Model
	Although the basis of OSPF configuration elements like routers,		Although the basis of OSPF configuration elements like routers,
	areas, and interfaces remains the same, the detailed configuration		areas, and interfaces remains the same, the detailed configuration
	model varies among router vendors. Differences are observed in terms		model varies among router vendors. Differences are observed in terms
	of how the protocol engine is tied to the routing domain, how		of how the protocol engine is tied to the routing domain, how
	multiple protocol engines are be instantiated, and configuration		multiple protocol engines are be instantiated among others.
	inheritance, among others.
	The goal of this document is to define a data model that provides a		The goal of this document is to define a data model that provides a
	common user interface to the OSPFv2 and OSPFv3 protocols. There is		common user interface to the OSPFv2 and OSPFv3 protocols. There is
	very little information that is designated as "mandatory", providing		very little information that is designated as "mandatory", providing
	freedom for vendors to adapt this data model to their respective		freedom for vendors to adapt this data model to their respective
	product implementations.		product implementations.
	2.1. Overview		2.1. OSPF Operational State
			The OSPF operational state is included in the same tree as OSPF
			configuration consistent with Network Management Datastore
			Architecture [I-D.ietf-netmod-revised-datastores]. Consequently,
			only the routing container in the ietf-routing model [RFC8022] is
			augmented. The routing-state container is not augmented.
			2.2. Overview
	The OSPF YANG module defined in this document has all the common		The OSPF YANG module defined in this document has all the common
	building blocks for the OSPF protocol.		building blocks for the OSPF protocol.
	The OSPF YANG module augments the /routing/control-plane-protocols/		The OSPF YANG module augments the /routing/control-plane-protocols/
	control-plane-protocol path defined in the ietf-routing module.		control-plane-protocol path defined in the ietf-routing module.
	module: ietf-ospf		module: ietf-ospf
	augment /rt:routing/rt:control-plane-protocols/		augment /rt:routing/rt:control-plane-protocols/
	rt:control-plane-protocol:		rt:control-plane-protocol:
	+--rw ospf		+--rw ospf
	+--rw all-instances-inherit {instance-inheritance}?
	.		.
	.		.
	+--rw operation-mode? identityref		+--rw operation-mode? identityref
	+--rw instance* [af]		+--rw instance* [af]
	.		.
	.		.
	+--rw areas		+--rw areas
	| +--rw area* [area-id]		| +--rw area* [area-id]
	| +--rw area-id area-id-type		| +--rw area-id area-id-type
	| +--rw all-interfaces-inherit {interface-inheritance}?
	| .		| .
	| .		| .
	| +--rw virtual-links		| +--rw virtual-links
	| | +--rw virtual-link* [transit-area-id router-id]		| | +--rw virtual-link* [transit-area-id router-id]
	| | .		| | .
	| | .		| | .
	| +--rw sham-links {pe-ce-protocol}?		| +--rw sham-links {pe-ce-protocol}?
	| | +--rw sham-link* [local-id remote-id]		| | +--rw sham-link* [local-id remote-id]
	| | .		| | .
	| | .		| | .
	skipping to change at page 4, line 50 ¶		skipping to change at page 4, line 48 ¶
	configuration construct that is identified by the local identifier		configuration construct that is identified by the local identifier
	'name'. The field 'version' allows support for OSPFv2 and OSPFv3.		'name'. The field 'version' allows support for OSPFv2 and OSPFv3.
	The ospf container includes one or more OSPF protocol engines, each		The ospf container includes one or more OSPF protocol engines, each
	enclosed in a separate instance entity. Each instance includes		enclosed in a separate instance entity. Each instance includes
	information for the routing domain based on the [routing-instance af]		information for the routing domain based on the [routing-instance af]
	specification. There is no default routing domain assumed by the		specification. There is no default routing domain assumed by the
	data model. For example, to enable OSPF on a vendor's default IPv4		data model. For example, to enable OSPF on a vendor's default IPv4
	routing domain, an explicit instance entity with a specification like		routing domain, an explicit instance entity with a specification like
	["default" "ipv4-unicast"] is required. The instance also contains		["default" "ipv4-unicast"] is required. The instance also contains
	OSPF router level configuration		OSPF router level configuration and operational state.
	The instance/area and instance/area/interface containers respectively		The instance/area and instance/area/interface containers respectively
	define the OSPF configuration for OSPF areas and interfaces.		define the OSPF configuration and operational state for OSPF areas
			and interfaces.
	The instance/topology container defines the OSPF configuration for		The instance/topology container defines the OSPF configuration and
	OSPF topologies when the multi-topology feature is supported.		operational state for OSPF topologies when the multi-topology feature
			is supported.
	2.2. OSPFv2 and OSPFv3		2.3. OSPFv2 and OSPFv3
	The data model defined herein supports both OSPFv2 and OSPFv3.		The data model defined herein supports both OSPFv2 and OSPFv3.
	The field 'version' is used to indicate the OSPF version and is		The field 'version' is used to indicate the OSPF version and is
	mandatory. Based on the configured version, the data model varies to		mandatory. Based on the configured version, the data model varies to
	accommodate the differences between OSPFv2 and OSPFv3.		accommodate the differences between OSPFv2 and OSPFv3.
	2.3. Optional Features		2.4. Optional Features
	Optional features are beyond the basic OSPF configuration and it is		Optional features are beyond the basic OSPF configuration and it is
	the responsibility of each vendor to decide whether to support a		the responsibility of each vendor to decide whether to support a
	given feature on a particular device.		given feature on a particular device.
	This model defines a number of features, such as NSR, max-LSA, etc.		This model defines a number of features, such as NSR, max-LSA, etc.
	It is expected that vendors will support additional features through		It is expected that vendors will support additional features through
	vendor specific augmentations.		vendor-specific augmentations.
	2.4. Inheritance
	This data model supports configuration inheritance at different
	levels including instance-level, area-level, and interface-level
	inheritance.
	The all-instances-inherit, all-areas-inherit, and all-interfaces-
	inherit containers are defined to provide a consistent way to
	configure inheritable configuration parameters. For example,
	parameters defined in the all-instances-inherit container apply to
	all OSPF instances. However, a particular instance configuration can
	include leaves that override this inheritance.
	Inheritance is defined as an optional feature, and vendors are
	permitted to augment the inheritance containers with their own vendor
	specific parameters.
	2.5. OSPF Router Configuration		2.5. OSPF Router Configuration/Operational State
	The ospf container is the top level container in this data model. It		The ospf container is the top level container in this data model. It
	contains shared information among the OSPF instances configured		contains shared information among the OSPF instances configured
	within the container.		within the container.
	module: ietf-ospf		module: ietf-ospf
	augment /rt:routing/rt:control-plane-protocols/		augment /rt:routing/rt:control-plane-protocols/
	rt:control-plane-protocol:		rt:control-plane-protocol:
	+--rw ospf		+--rw ospf
	+--rw all-instances-inherit {instance-inheritance}?
	| +--rw area
	| +--rw interface
	+--rw operation-mode? identityref		+--rw operation-mode? identityref
	+--rw instance* [af]		+--rw instance* [af]
	.		.
	.		.
	2.6. OSPF Instance Configuration		2.6. OSPF Instance Configuration/Operational State
	The instance container represents an OSPF protocol engine and		The instance container represents an OSPF protocol engine and
	contains the router level configuration. The routing domain for each		contains the router level configuration and operational state. The
	instance is dictated through the specification of [routing-instance		routing domain for each instance is dictated through the
	af].		specification of [routing-instance af]. The instance level
			operational state includes the instance level statistics, IETF SPF
	The all-areas-inherit container contains area configuration that may		delay statistics, AS-Scoped Link State Database, local RIB, SPF Log,
	be inherited by configured OSPF areas in the OSPF instance.		and the LSA log.
	module: ietf-ospf		module: ietf-ospf
	augment /rt:routing/rt:control-plane-protocols/		augment /rt:routing/rt:control-plane-protocols/
	rt:control-plane-protocol:		rt:control-plane-protocol:
	+--rw ospf		+--rw ospf
	.		.
	.		.
	+--rw instance* [af]		+--rw instance* [af]
	+--rw af identityref		+--rw af identityref
	+--rw all-areas-inherit {area-inheritance}?
	| +--rw area
	| +--rw interface
	+--rw explicit-router-id? rt-types:router-id		+--rw explicit-router-id? rt-types:router-id
	| {explicit-router-id}?		| {explicit-router-id}?
	+--rw preference		+--rw preference
	| +--rw (scope)?		| +--rw (scope)?
	| +--:(single-value)		| +--:(single-value)
	| | +--rw all? uint8		| | +--rw all? uint8
	| +--:(multi-values)		| +--:(multi-values)
	| +--rw (granularity)?		| +--rw (granularity)?
	| | +--:(detail)		| | +--:(detail)
	| | | +--rw intra-area? uint8		| | | +--rw intra-area? uint8
	skipping to change at page 7, line 39 ¶		skipping to change at page 7, line 13 ¶
	| +--rw te-rid {te-rid}?		| +--rw te-rid {te-rid}?
	| | +--rw ipv4-router-id? inet:ipv4-address		| | +--rw ipv4-router-id? inet:ipv4-address
	| | +--rw ipv6-router-id? inet:ipv6-address		| | +--rw ipv6-router-id? inet:ipv6-address
	| +--rw ldp		| +--rw ldp
	| +--rw igp-sync? boolean {ldp-igp-sync}?		| +--rw igp-sync? boolean {ldp-igp-sync}?
	+--rw fast-reroute {fast-reroute}?		+--rw fast-reroute {fast-reroute}?
	| +--rw lfa {lfa}?		| +--rw lfa {lfa}?
	+--rw node-tags {node-tag}?		+--rw node-tags {node-tag}?
	| +--rw node-tag* [tag]		| +--rw node-tag* [tag]
	| +--rw tag uint32		| +--rw tag uint32
			+--ro router-id?
			+--ro local-rib
			| +--ro route* [prefix]
			| +--ro prefix inet:ip-prefix
			| +--ro next-hops
			| | +--ro next-hop* [next-hop]
			| | +--ro outgoing-interface? if:interface-ref
			| | +--ro next-hop inet:ip-address
			| +--ro metric? uint32
			| +--ro route-type? route-type
			| +--ro route-tag? uint32
			+--ro statistics
			| +--ro originate-new-lsa-count? yang:counter32
			| +--ro rx-new-lsas-count? yang:counter32
			| +--ro as-scope-lsa-count? yang:gauge32
			| +--ro as-scope-lsa-chksum-sum? uint32
			| +--ro database
			| +--ro as-scope-lsa-type*
			| +--ro lsa-type? uint16
			| +--ro lsa-count? yang:gauge32
			| +--ro lsa-cksum-sum? int32
			+--ro ietf-spf-delay
			| +--ro initial-delay? uint16
			| +--ro short-delay? uint16
			| +--ro long-delay? uint16
			| +--ro hold-down? uint16
			| +--ro time-to-learn? uint16
			| +--ro current-state? enumeration
			| +--ro remaining-time-to-learn? uint16
			| +--ro remaining-hold-down? uint16
			| +--ro last-event-received? yang:timestamp
			| +--ro next-spf-time? yang:timestamp
			| +--ro last-spf-time? yang:timestamp
			+--ro database
			| +--ro as-scope-lsa-type* [lsa-type]
			| +--ro as-scope-lsas
			| +--ro as-scope-lsa* [lsa-id adv-router]
			| +--ro lsa-id union
			| +--ro adv-router inet:ipv4-address
			| +--ro decoded-completed? boolean
			| +--ro raw-data? yang:hex-string
			| +--ro (version)?
			| +--:(ospfv2)
			| | +--ro ospfv2
			. .
			. .
			| +--:(ospfv3)
			| +--ro ospfv3
			.
			.
			+--ro spf-log
			| +--ro event* [id]
			| +--ro id uint32
			| +--ro spf-type? enumeration
			| +--ro schedule-timestamp? yang:timestamp
			| +--ro start-timestamp? yang:timestamp
			| +--ro end-timestamp? yang:timestamp
			| +--ro trigger-lsa*
			| +--ro area-id? area-id-type
			| +--ro link-id? union
			| +--ro type? uint16
			| +--ro lsa-id? yang:dotted-quad
			| +--ro adv-router? yang:dotted-quad
			| +--ro seq-num? uint32
			+--ro lsa-log
			| +--ro event* [id]
			| +--ro id uint32
			| +--ro lsa
			| | +--ro area-id? area-id-type
			| | +--ro link-id? union
			| | +--ro type? uint16
			| | +--ro lsa-id? yang:dotted-quad
			| | +--ro adv-router? yang:dotted-quad
			| | +--ro seq-num? uint32
			| +--ro received-timestamp? yang:timestamp
			| +--ro reason? identityref
	.		.
	.		.
	2.7. OSPF Area Configuration		2.7. OSPF Area Configuration/Operational State
	The area container contains OSPF area configuration and the list of		The area container contains OSPF area configuration and the list of
	interface containers representing all the OSPF interfaces in the		interface containers representing all the OSPF interfaces in the
	area.		area. The area operational state includes the area statistics and
			the area Link State Database (LSDB).
	The all-interfaces-inherit contains interface configuration that may
	be inherited by all OSPF area interfaces.
	module: ietf-ospf		module: ietf-ospf
	augment /rt:routing/rt:control-plane-protocols/		augment /rt:routing/rt:control-plane-protocols/
	rt:control-plane-protocol:		rt:control-plane-protocol:
	+--rw ospf		+--rw ospf
	.		.
	.		.
	+--rw instance* [af]		+--rw instance* [af]
	+--rw areas		+--rw areas
	| +--rw area* [area-id]		| +--rw area* [area-id]
	| +--rw area-id area-id-type		| +--rw area-id area-id-type
	| +--rw all-interfaces-inherit {interface-inheritance}?
	| | +--rw interface
	| +--rw area-type? identityref		| +--rw area-type? identityref
	| +--rw summary? boolean		| +--rw summary? boolean
	| +--rw default-cost? uint32		| +--rw default-cost? uint32
	| +--rw ranges		| +--rw ranges
	| | +--rw range* [prefix]		| | +--rw range* [prefix]
	| | +--rw prefix inet:ip-prefix		| | +--rw prefix inet:ip-prefix
	| | +--rw advertise? boolean		| | +--rw advertise? boolean
	| | +--rw cost? uint24		| | +--rw cost? uint24
			| +--ro statistics
			| | +--ro spf-runs-count? yang:counter32
			| | +--ro abr-count? yang:gauge32
			| | +--ro asbr-count? yang:gauge32
			| | +--ro ar-nssa-translator-event-count?
			| | yang:counter32
			| | +--ro area-scope-lsa-count? yang:gauge32
			| | +--ro area-scope-lsa-cksum-sum? int32
			| | +--ro database
			| | +--ro area-scope-lsa-type*
			| | +--ro lsa-type? uint16
			| | +--ro lsa-count? yang:gauge32
			| | +--ro lsa-cksum-sum? int32
			| +--ro database
			| | +--ro area-scope-lsa-type* [lsa-type]
			| | +--ro lsa-type uint16
			| | +--ro area-scope-lsas
			| | +--ro area-scope-lsa* [lsa-id adv-router]
			| | +--ro lsa-id union
			. . .
			. . .
			| | +--ro (version)?
			| | +--:(ospfv2)
			| | | +--ro ospfv2
			| | | +--ro header
			. . . .
			. . . .
			| | | +--ro body
			| | | +--ro router
			. . . .
			. . . .
			| | | +--ro network
			. . . .
			. . . .
			| | | +--ro summary
			. . . .
			. . . .
			| | | +--ro external
			. . . .
			. . . .
			| | | +--ro opaque
			. . . .
			. . . .
			| | +--:(ospfv3)
			| | +--ro ospfv3
			| | +--ro header
			. . .
			. . .
			| | +--ro body
			| | +--ro router
			. . .
			. . .
			| | +--ro network
			. . .
			. . .
			| | +--ro inter-area-prefix
			. . .
			. . .
			| | +--ro inter-area-router
			. . .
			. . .
			| | +--ro as-external
			. . .
			. . .
			| | +--ro nssa
			. . .
			. . .
			| | +--ro link
			. . .
			. . .
			| | +--ro intra-area-prefix
			. . .
			. . .
			| | +--ro router-information
			. . .
			. . .
	| +--rw virtual-links		| +--rw virtual-links
	| | +--rw virtual-link* [transit-area-id router-id]		| | +--rw virtual-link* [transit-area-id router-id]
	| | +--rw transit-area-id -> ../../../area-id		| | +--rw transit-area-id -> ../../../../
			| | area/area-id
	| | +--rw router-id rt-types:router-id		| | +--rw router-id rt-types:router-id
	| | +--rw hello-interval? uint16		| | +--rw hello-interval? uint16
	| | +--rw dead-interval? uint32		| | +--rw dead-interval? uint32
	| | +--rw retransmit-interval? uint16		| | +--rw retransmit-interval? uint16
	| | +--rw transmit-delay? uint16		| | +--rw transmit-delay? uint16
	| | +--rw lls? boolean {lls}?		| | +--rw lls? boolean {lls}?
	| | +--rw ttl-security {ttl-security}?		| | +--rw ttl-security {ttl-security}?
	| | | +--rw enable? boolean		| | | +--rw enable? boolean
	| | | +--rw hops? uint8		| | | +--rw hops? uint8
	| | +--rw enable? boolean		| | +--rw enable? boolean
	skipping to change at page 8, line 48 ¶		skipping to change at page 11, line 27 ¶
	| | +--rw (auth-type-selection)?		| | +--rw (auth-type-selection)?
	| | +--:(auth-ipsec)		| | +--:(auth-ipsec)
	| | {ospfv3-authentication-ipsec}?		| | {ospfv3-authentication-ipsec}?
	| | | +--rw sa? string		| | | +--rw sa? string
	| | +--:(auth-trailer-key-chain)		| | +--:(auth-trailer-key-chain)
	| | | +--rw key-chain?		| | | +--rw key-chain?
	| | key-chain:key-chain-ref		| | key-chain:key-chain-ref
	| | +--:(auth-trailer-key)		| | +--:(auth-trailer-key)
	| | +--rw key? string		| | +--rw key? string
	| | +--rw crypto-algorithm? identityref		| | +--rw crypto-algorithm? identityref
			| | +--ro cost? uint16
			| | +--ro state? if-state-type
			| | +--ro hello-timer? uint32
			| | +--ro wait-timer? uint32
			| | +--ro dr-router-id? rt-types:router-id
			| | +--ro dr-ip-addr? inet:ip-address
			| | +--ro bdr-router-id? rt-types:router-id
			| | +--ro bdr-ip-addr? inet:ip-address
			| | +--ro statistics
			| | | +--ro if-event-count? yang:counter32
			| | | +--ro link-scope-lsa-count? yang:gauge32
			| | | +--ro link-scope-lsa-cksum-sum?
			| | | uint32
			| | | +--ro database
			| | | +--ro link-scope-lsa-type*
			| | | +--ro lsa-type? uint16
			| | | +--ro lsa-count? yang:gauge32
			| | | +--ro lsa-cksum-sum? int32
			| | +--ro neighbors
			| | | +--ro neighbor* [neighbor-router-id]
			| | | +--ro neighbor-router-id
			| | | rt-types:router-id
			| | | +--ro address? inet:ip-address
			| | | +--ro dr-router-id? rt-types:router-id
			| | | +--ro dr-ip-addr? inet:ip-address
			| | | +--ro bdr-router-id? rt-types:router-id
			| | | +--ro bdr-ip-addr? inet:ip-address
			| | | +--ro state? nbr-state-type
			| | | +--ro dead-timer? uint32
			| | | +--ro statistics
			| | | +--ro nbr-event-count?
			| | | yang:counter32
			| | | +--ro nbr-retrans-qlen?
			| | | yang:gauge32
			| | +--ro database
			| | +--ro link-scope-lsa-type* [lsa-type]
			| | +--ro lsa-type uint16
			| | +--ro link-scope-lsas
			. .
			. .
	| +--rw sham-links {pe-ce-protocol}?		| +--rw sham-links {pe-ce-protocol}?
	| | +--rw sham-link* [local-id remote-id]		| | +--rw sham-link* [local-id remote-id]
	| | +--rw local-id inet:ip-address		| | +--rw local-id inet:ip-address
	| | +--rw remote-id inet:ip-address		| | +--rw remote-id inet:ip-address
	| | +--rw hello-interval? uint16		| | +--rw hello-interval? uint16
	| | +--rw dead-interval? uint32		| | +--rw dead-interval? uint32
	| | +--rw retransmit-interval? uint16		| | +--rw retransmit-interval? uint16
	| | +--rw transmit-delay? uint16		| | +--rw transmit-delay? uint16
	| | +--rw lls? boolean {lls}?		| | +--rw lls? boolean {lls}?
	| | +--rw ttl-security {ttl-security}?		| | +--rw ttl-security {ttl-security}?
	skipping to change at page 9, line 30 ¶		skipping to change at page 12, line 49 ¶
	| | | | +--rw key-chain?		| | | | +--rw key-chain?
	| | | key-chain:key-chain-ref		| | | key-chain:key-chain-ref
	| | | +--:(auth-trailer-key)		| | | +--:(auth-trailer-key)
	| | | +--rw key? string		| | | +--rw key? string
	| | | +--rw crypto-algorithm? identityref		| | | +--rw crypto-algorithm? identityref
	| | +--rw cost? uint16		| | +--rw cost? uint16
	| | +--rw mtu-ignore? boolean		| | +--rw mtu-ignore? boolean
	| | {mtu-ignore}?		| | {mtu-ignore}?
	| | +--rw prefix-suppression? boolean		| | +--rw prefix-suppression? boolean
	| | {prefix-suppression}?		| | {prefix-suppression}?
			| | +--ro state? if-state-type
			| | +--ro hello-timer? uint32
			| | +--ro wait-timer? uint32
			| | +--ro dr-router-id? rt-types:router-id
			| | +--ro dr-ip-addr? inet:ip-address
			| | +--ro bdr-router-id? rt-types:router-id
			| | +--ro bdr-ip-addr? inet:ip-address
			| | +--ro statistics
			| | | +--ro if-event-count? yang:counter32
			| | | +--ro link-scope-lsa-count? yang:gauge32
			| | | +--ro link-scope-lsa-cksum-sum?
			| | | uint32
			| | | +--ro database
			| | | +--ro link-scope-lsa-type*
			| | | +--ro lsa-type? uint16
			| | | +--ro lsa-count? yang:gauge32
			| | | +--ro lsa-cksum-sum? int32
			| | +--ro neighbors
			| | | +--ro neighbor* [neighbor-router-id]
			| | | +--ro neighbor-router-id
			| | | rt-types:router-id
			| | | +--ro address? inet:ip-address
			| | | +--ro dr-router-id? rt-types:router-id
			| | | +--ro dr-ip-addr? inet:ip-address
			| | | +--ro bdr-router-id? rt-types:router-id
			| | | +--ro bdr-ip-addr? inet:ip-address
			| | | +--ro state? nbr-state-type
			| | | +--ro dead-timer? uint32
			| | | +--ro statistics
			| | | +--ro nbr-event-count?
			| | | yang:counter32
			| | | +--ro nbr-retrans-qlen?
			| | | yang:gauge32
			| | +--ro database
			| | +--ro link-scope-lsa-type* [lsa-type]
			| | +--ro lsa-type uint16
			| | +--ro link-scope-lsas
	. .		. .
	. .		. .
	2.8. OSPF Interface Configuration		2.8. OSPF Interface Configuration/Operational State
	The interface container contains OSPF interface configuration.		The interface container contains OSPF interface configuration and
			operational state. The interface operational state includes the
			statistics, list of neighbors, and link-local Link State database
			(LSDB).
	module: ietf-ospf		module: ietf-ospf
	augment /rt:routing/rt:control-plane-protocols/		augment /rt:routing/rt:control-plane-protocols/
	rt:control-plane-protocol:		rt:control-plane-protocol:
	+--rw ospf		+--rw ospf
	.		.
	.		.
	+--rw instance* [af]		+--rw instance* [af]
	.		.
	.		.
	skipping to change at page 11, line 8 ¶		skipping to change at page 15, line 19 ¶
	| | | +--rw key-chain?		| | | +--rw key-chain?
	| | | key-chain:key-chain-ref		| | | key-chain:key-chain-ref
	| | +--:(auth-trailer-key)		| | +--:(auth-trailer-key)
	| | +--rw key? string		| | +--rw key? string
	| | +--rw crypto-algorithm? identityref		| | +--rw crypto-algorithm? identityref
	| +--rw cost? uint16		| +--rw cost? uint16
	| +--rw mtu-ignore? boolean		| +--rw mtu-ignore? boolean
	| | {mtu-ignore}?		| | {mtu-ignore}?
	| +--rw prefix-suppression? boolean		| +--rw prefix-suppression? boolean
	| | {prefix-suppression}?		| | {prefix-suppression}?
			| +--ro state? if-state-type
			| +--ro hello-timer? uint32
			| +--ro wait-timer? uint32
			| +--ro dr-router-id? rt-types:router-id
			| +--ro dr-ip-addr? inet:ip-address
			| +--ro bdr-router-id? rt-types:router-id
			| +--ro bdr-ip-addr? inet:ip-address
			| +--ro statistics
			| | +--ro if-event-count? yang:counter32
			| | +--ro link-scope-lsa-count? yang:gauge32
			| | +--ro link-scope-lsa-cksum-sum?
			| | uint32
			| | +--ro database
			| | +--ro link-scope-lsa-type*
			| | +--ro lsa-type? uint16
			| | +--ro lsa-count? yang:gauge32
			| | +--ro lsa-cksum-sum? int32
			| +--ro neighbors
			| | +--ro neighbor* [neighbor-router-id]
			| | +--ro neighbor-router-id
			| | rt-types:router-id
			| | +--ro address? inet:ip-address
			| | +--ro dr-router-id? rt-types:router-id
			| | +--ro dr-ip-addr? inet:ip-address
			| | +--ro bdr-router-id? rt-types:router-id
			| | +--ro bdr-ip-addr? inet:ip-address
			| | +--ro state? nbr-state-type
			| | +--ro dead-timer? uint32
			| | +--ro statistics
			| | +--ro nbr-event-count?
			| | yang:counter32
			| | +--ro nbr-retrans-qlen?
			| | yang:gauge32
			| +--ro database
			| . +--ro link-scope-lsa-type* [lsa-type]
			| . +--ro lsa-type uint16
			| . +--ro link-scope-lsas
			. .
			. .
	| +--rw topologies {ospf:multi-topology}?		| +--rw topologies {ospf:multi-topology}?
	| | +--rw topology* [name]		| | +--rw topology* [name]
	| | +--rw name -> ../../../../../../../../		| | +--rw name -> ../../../../../../../../
	| | ../../../rt:ribs/rib/name		| | ../../../rt:ribs/rib/name
	| | +--rw cost? uint32		| | +--rw cost? uint32
	| +--rw instance-id? uint8		| +--rw instance-id? uint8
	.		.
	.		.
	2.9. OSPF notification		2.9. OSPF notification
	skipping to change at page 15, line 28 ¶		skipping to change at page 20, line 28 ¶
	| + control-plane-protocol/name		| + control-plane-protocol/name
	| +---w interface? if:interface-ref		| +---w interface? if:interface-ref
	+---x clear-database		+---x clear-database
	+---w input		+---w input
	+---w routing-protocol-name		+---w routing-protocol-name
	-> /rt:routing/control-plane-protocols/		-> /rt:routing/control-plane-protocols/
	control-plane-protocol/name		control-plane-protocol/name
	3. OSPF Yang Module		3. OSPF Yang Module
	<CODE BEGINS> file "ietf-ospf@2017-03-12.yang"		<CODE BEGINS> file "ietf-ospf@2017-07-01.yang"
	module ietf-ospf {		module ietf-ospf {
	namespace "urn:ietf:params:xml:ns:yang:ietf-ospf";		namespace "urn:ietf:params:xml:ns:yang:ietf-ospf";
	prefix ospf;		prefix ospf;
	import ietf-inet-types {		import ietf-inet-types {
	prefix "inet";		prefix "inet";
	}		}
	import ietf-yang-types {		import ietf-yang-types {
	skipping to change at page 15, line 50 ¶		skipping to change at page 20, line 50 ¶
	}		}
	import ietf-interfaces {		import ietf-interfaces {
	prefix "if";		prefix "if";
	}		}
	import ietf-routing-types {		import ietf-routing-types {
	prefix "rt-types";		prefix "rt-types";
	}		}
			import iana-routing-types {
			prefix "iana-rt-types";
			}
	import ietf-routing {		import ietf-routing {
	prefix "rt";		prefix "rt";
	}		}
	import ietf-key-chain {		import ietf-key-chain {
	prefix "key-chain";		prefix "key-chain";
	}		}
	organization		organization
	"Cisco Systems		"IETF OSPF - OSPF Working Group";
	170 West Tasman Drive
	San Jose, CA 95134-1706
	USA";
	contact		contact
	"WG Web: <http://tools.ietf.org/wg/ospf/>		"WG Web: <http://datatracker.ietf.org/group/ospf/>
	WG List: <mailto:ospf@ietf.org>		WG List: <mailto:ospf@ietf.org>
	WG Chair: Acee Lindem
	<mailto:acee@cisco.com>
	WG Chair: Abhay Roy
	<mailto:akr@cisco.com>
	Editor: Derek Yeung		Editor: Derek Yeung
	<mailto:derek@arrcus.com>		<mailto:derek@arrcus.com>
	Author: Derek Yeung		Author: Acee Lindem
	<mailto:derek@arrcus.com>		<mailto:acee@cisco.com>
	Author: Yingzhen Qu		Author: Yingzhen Qu
	<mailto:yingzhen.qu@huawei.com>		<mailto:yingzhen.qu@huawei.com>
	Author: Jeffrey Zhang		Author: Jeffrey Zhang
	<mailto:zzhang@juniper.net>		<mailto:zzhang@juniper.net>
	Author: Ing-Wher Chen		Author: Ing-Wher Chen
	<mailto:ing-wher_chen@jabil.com>		<mailto:ing-wher_chen@jabil.com>
	Author: Dean Bogdanovic		Author: Dean Bogdanovic
	<mailto:ivandean@gmail.com>		<mailto:ivandean@gmail.com>
	Author: Kiran Agrahara Sreenivasa		Author: Kiran Agrahara Sreenivasa
	<mailto:kkoushik@cisco.com>";		<mailto:kkoushik@cisco.com>";
	description		description
	"This YANG module defines the generic configuration and		"This YANG module defines the generic configuration and
	operational state for the OSPF protocol common to all		operational state for the OSPF protocol common to all
	vendor implementations. It is intended that the module		vendor implementations. It is intended that the module
	will be extended by vendors to define vendor-specific		will be extended by vendors to define vendor-specific
	OSPF configuration parameters and policies,		OSPF configuration parameters and policies,
	for example route maps or route policies.		for example route maps or route policies.
	Terms and Acronyms
	OSPF (ospf): Open Shortest Path First		Copyright (c) 2017 IETF Trust and the persons identified as
			authors of the code. All rights reserved.
	IP (ip): Internet Protocol		Redistribution and use in source and binary forms, with or
	IPv4 (ipv4):Internet Protocol Version 4		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).
			This version of this YANG module is part of RFC XXXX;
			see the RFC itself for full legal notices.";
	IPv6 (ipv6): Internet Protocol Version 6		reference "RFC XXXX";
	MTU (mtu) Maximum Transmission Unit		revision 2017-07-01 {
	";		description
			"* Restructure model to conform to NMDA.
			* Remove features for instance, area and interface
			inheritance.
			* Update static neighbor identifier description to
			allow for router-id, ipv4-address, and ipv6-address.
			* Added spf-log and lsa-log.
			* Use dotted-quad for OSPFv2 LSA ID.
			* Fix virtual-link transit-area-id leafref path and
			must statement.
			";
			reference
			"RFC XXXX: A YANG Data Model for OSPF.";
			}
	revision 2017-03-12 {		revision 2017-03-12 {
	description		description
	"* Update authors information.		"* Update authors information.
	* Rename admin distance to preference.		* Rename admin distance to preference.
	* Rename network type to interface type.		* Rename network type to interface type.
	* Add ietf-spf-delay as a feature.		* Add ietf-spf-delay as a feature.
	* Add node-tag as a feature and update LSA		* Add node-tag as a feature and update LSA
	definition accordingly.		definition accordingly.
	* Remove LDP IGP autoconfig.		* Remove LDP IGP autoconfig.
	skipping to change at page 20, line 28 ¶		skipping to change at page 25, line 42 ¶
	"RFC XXXX: A YANG Data Model for OSPF.";		"RFC XXXX: A YANG Data Model for OSPF.";
	}		}
	revision 2015-03-09 {		revision 2015-03-09 {
	description		description
	"Initial revision.";		"Initial revision.";
	reference		reference
	"RFC XXXX: A YANG Data Model for OSPF.";		"RFC XXXX: A YANG Data Model for OSPF.";
	}		}
			feature multi-topology {
			description
			"Support Multiple-Topolgy Routing (MTR).";
			}
			feature multi-area-adj {
			description
			"OSPF multi-area adjacency support as in RFC 5185.";
			}
			feature explicit-router-id {
			description
			"Set Router-ID per instance explicitly.";
			}
			feature demand-circuit {
			description
			"OSPF demand circuit support as in RFC 1793.";
			}
			feature mtu-ignore {
			description
			"Disable OSPF Database Description packet MTU
			mismatch checking.";
			}
			feature lls {
			description
			"OSPF link-local signaling (LLS) as in RFC 5613.";
			}
			feature prefix-suppression {
			description
			"OSPF prefix suppression support as in RFC 6860.";
			}
			feature ttl-security {
			description
			"OSPF TTL security check.";
			}
			feature nsr {
			description
			"Non-Stop-Routing (NSR).";
			}
			feature graceful-restart {
			description
			"Graceful OSPF Restart as defined in RFC 3623 and
			RFC 5187.";
			}
			feature admin-control {
			description
			"Administrative control of the protocol state.";
			}
			feature auto-cost {
			description
			"Calculate OSPF interface cost according to
			reference bandwidth.";
			}
			feature max-ecmp {
			description
			"Setting maximum number of ECMP paths.";
			}
			feature max-lsa {
			description
			"Setting maximum number of LSAs the OSPF instance
			will accept.";
			}
			feature te-rid {
			description
			"TE Router-ID.";
			}
			feature ldp-igp-sync {
			description
			"LDP IGP synchronization.";
			}
			feature ospfv3-authentication-ipsec {
			description
			"Use IPsec for OSPFv3 authentication.";
			}
			feature fast-reroute {
			description
			"Support of IP Fast Reroute (IP-FRR).";
			}
			feature node-flag {
			description
			"Support of node flag.";
			}
			feature node-tag {
			description
			"Support of node tag.";
			}
			feature lfa {
			description
			"Support of Loop Free Alternates (LFAs).";
			}
			feature remote-lfa {
			description
			"Support of Remote Loop Free Alternates (R-LFA).";
			}
			feature stub-router {
			description
			"Support of RFC 6987 OSPF Stub Router Advertisement.";
			}
			feature pe-ce-protocol {
			description
			"Support PE-CE protocol";
			}
			feature ietf-spf-delay {
			description
			"Support of IETF SPF delay algorithm.";
			}
			feature bfd {
			description
			"Support of BFD.";
			}
	identity ospfv2 {		identity ospfv2 {
	base "rt:routing-protocol";		base "rt:routing-protocol";
	description "OSPFv2";		description "OSPFv2";
	}		}
	identity ospfv3 {		identity ospfv3 {
	base "rt:routing-protocol";		base "rt:routing-protocol";
	description "OSPFv3";		description "OSPFv3";
	}		}
	skipping to change at page 21, line 19 ¶		skipping to change at page 29, line 22 ¶
	identity stub {		identity stub {
	base area-type;		base area-type;
	description "OSPF stub area.";		description "OSPF stub area.";
	}		}
	identity nssa {		identity nssa {
	base area-type;		base area-type;
	description "OSPF NSSA area.";		description "OSPF NSSA area.";
	}		}
			identity lsa-log-reason {
			description
			"Base identity for an LSA log reason.";
			}
			identity lsa-refresh {
			base lsa-log-reason;
			description
			"Identity used when the LSA is logged
			as a result of receiving a refresh LSA.";
			}
			identity lsa-content-change {
			base lsa-log-reason;
			description
			"Identity used when the LSA is logged
			as a result of a change in the content
			of the LSA.";
			}
			identity lsa-purge {
			base lsa-log-reason;
			description
			"Identity used when the LSA is logged
			as a result of being purged.";
			}
	typedef uint24 {		typedef uint24 {
	type uint32 {		type uint32 {
	range "0 .. 16777215";		range "0 .. 16777215";
	}		}
	description		description
	"24-bit unsigned integer.";		"24-bit unsigned integer.";
	}		}
	typedef area-id-type {		typedef area-id-type {
	type yang:dotted-quad;		type yang:dotted-quad;
	description		description
	"Area ID type.";		"Area ID type.";
	}		}
	skipping to change at page 26, line 39 ¶		skipping to change at page 35, line 21 ¶
	}		}
	typedef checksum16-type {		typedef checksum16-type {
	type string {		type string {
	pattern '(0x)?[0-9a-fA-F]{4}';		pattern '(0x)?[0-9a-fA-F]{4}';
	}		}
	description		description
	"16-bit checksum in hex-string format 0xXXXX.";		"16-bit checksum in hex-string format 0xXXXX.";
	}		}
	feature multi-topology {
	description
	"Support Multiple-Topolgy Routing (MTR).";
	}
	feature multi-area-adj {
	description
	"OSPF multi-area adjacency support as in RFC 5185.";
	}
	feature explicit-router-id {
	description
	"Set Router-ID per instance explicitly.";
	}
	feature demand-circuit {
	description
	"OSPF demand circuit support as in RFC 1793.";
	}
	feature mtu-ignore {
	description
	"Disable OSPF Database Description packet MTU
	mismatch checking.";
	}
	feature lls {
	description
	"OSPF link-local signaling (LLS) as in RFC 5613.";
	}
	feature prefix-suppression {
	description
	"OSPF prefix suppression support as in RFC 6860.";
	}
	feature ttl-security {
	description
	"OSPF TTL security check.";
	}
	feature nsr {
	description
	"Non-Stop-Routing (NSR).";
	}
	feature graceful-restart {
	description
	"Graceful OSPF Restart as defined in RFC 3623 and
	RFC 5187.";
	}
	feature admin-control {
	description
	"Administrative control of the protocol state.";
	}
	feature auto-cost {
	description
	"Calculate OSPF interface cost according to
	reference bandwidth.";
	}
	feature max-ecmp {
	description
	"Setting maximum number of ECMP paths.";
	}
	feature max-lsa {
	description
	"Setting maximum number of LSAs the OSPF instance
	will accept.";
	}
	feature te-rid {
	description
	"TE Router-ID.";
	}
	feature ldp-igp-sync {
	description
	"LDP IGP synchronization.";
	}
	feature ospfv3-authentication-ipsec {
	description
	"Use IPsec for OSPFv3 authentication.";
	}
	feature fast-reroute {
	description
	"Support of IP Fast Reroute (IP-FRR).";
	}
	feature node-flag {
	description
	"Support of node flag.";
	}
	feature node-tag {
	description
	"Support of node tag.";
	}
	feature lfa {
	description
	"Support of Loop Free Alternates (LFAs).";
	}
	feature remote-lfa {
	description
	"Support of Remote Loop Free Alternates (R-LFA).";
	}
	feature stub-router {
	description
	"Support of RFC 6987 OSPF Stub Router Advertisement.";
	}
	feature instance-inheritance {
	description
	"Support instance inheritance";
	}
	feature area-inheritance {
	description
	"Support area inheritance";
	}
	feature interface-inheritance {
	description
	"Support interface inheritance";
	}
	feature pe-ce-protocol {
	description
	"Support PE-CE protocol";
	}
	feature ietf-spf-delay {
	description
	"Support of IETF SPF delay algorithm.";
	}
	feature bfd {
	description
	"Support of BFD.";
	}
	grouping tlv {		grouping tlv {
	description		description
	"TLV";		"TLV";
	leaf type {		leaf type {
	type uint16;		type uint16;
	description "TLV type.";		description "TLV type.";
	}		}
	leaf length {		leaf length {
	type uint16;		type uint16;
	description "TLV length.";		description "TLV length.";
	skipping to change at page 47, line 17 ¶		skipping to change at page 52, line 44 ¶
	bit DN {		bit DN {
	description		description
	"When a type 3, 5 or 7 LSA is sent from a PE to a CE,		"When a type 3, 5 or 7 LSA is sent from a PE to a CE,
	the DN bit must be set. See RFC 4576.";		the DN bit must be set. See RFC 4576.";
	}		}
	}		}
	mandatory true;		mandatory true;
	description "LSA options.";		description "LSA options.";
	}		}
	leaf lsa-id {		leaf lsa-id {
	type inet:ipv4-address;		type yang:dotted-quad;
	mandatory true;		mandatory true;
	description "LSA ID.";		description "LSA ID.";
	}		}
	leaf opaque-type {		leaf opaque-type {
	type uint8;		type uint8;
	description "Opaque type.";		description "Opaque type.";
	}		}
	leaf opaque-id {		leaf opaque-id {
	type uint24;		type uint24;
	description "Opaque ID.";		description "Opaque ID.";
	}		}
	uses lsa-header;		uses lsa-header;
	}		}
	container body {		container body {
	skipping to change at page 48, line 51 ¶		skipping to change at page 54, line 31 ¶
	uses ospfv3-lsa;		uses ospfv3-lsa;
	}		}
	}		}
	}		}
	grouping lsa-key {		grouping lsa-key {
	description		description
	"OSPF LSA key.";		"OSPF LSA key.";
	leaf lsa-id {		leaf lsa-id {
	type union {		type union {
	type inet:ipv4-address;		type yang:dotted-quad;
	type uint32;		type uint32;
	}		}
	description		description
	"LSA ID.";		"LSA ID.";
	}		}
	leaf adv-router {		leaf adv-router {
	type inet:ipv4-address;		type inet:ipv4-address;
	description		description
	"Advertising router.";		"Advertising router.";
	}		}
	skipping to change at page 58, line 13 ¶		skipping to change at page 63, line 40 ¶
	container static-neighbors {		container static-neighbors {
	description "Statically configured neighbors.";		description "Statically configured neighbors.";
	list neighbor {		list neighbor {
	key "identifier";		key "identifier";
	description		description
	"Specify a static OSPF neighbor.";		"Specify a static OSPF neighbor.";
	leaf identifier {		leaf identifier {
	type inet:ip-address;		type inet:ip-address;
	description "Neighbor IPv4 address or router ID.";		description
			"Neighbor router ID, IPv4 address, or IPv6 address.";
	}		}
	leaf cost {		leaf cost {
	type uint16 {		type uint16 {
	range "1..65535";		range "1..65535";
	}		}
	description "Neighbor cost.";		description "Neighbor cost.";
	}		}
	leaf poll-interval {		leaf poll-interval {
	type uint16 {		type uint16 {
	skipping to change at page 59, line 14 ¶		skipping to change at page 64, line 42 ¶
	description		description
	"True if BFD is enabled for the OSPF interface.";		"True if BFD is enabled for the OSPF interface.";
	}		}
	}		}
	uses interface-fast-reroute-config;		uses interface-fast-reroute-config;
	uses interface-common-config;		uses interface-common-config;
	uses interface-physical-link-config;		uses interface-physical-link-config;
	} // grouping interface-config		} // grouping interface-config
	grouping neighbor-operation {		grouping neighbor-state {
	description		description
	"OSPF neighbor operation data.";		"OSPF neighbor operational state.";
	leaf address {		leaf address {
	type inet:ip-address;		type inet:ip-address;
			config false;
	description		description
	"Neighbor address.";		"Neighbor address.";
	}		}
	leaf dr-router-id {		leaf dr-router-id {
	type rt-types:router-id;		type rt-types:router-id;
			config false;
	description "Neighbor's Designated Router (DR) router ID.";		description "Neighbor's Designated Router (DR) router ID.";
	}		}
	leaf dr-ip-addr {		leaf dr-ip-addr {
	type inet:ip-address;		type inet:ip-address;
			config false;
	description "Neighbor's Designated Router (DR) IP address.";		description "Neighbor's Designated Router (DR) IP address.";
	}		}
	leaf bdr-router-id {		leaf bdr-router-id {
	type rt-types:router-id;		type rt-types:router-id;
			config false;
	description		description
	"Neighbor's Backup Designated Router (BDR) router ID.";		"Neighbor's Backup Designated Router (BDR) router ID.";
	}		}
	leaf bdr-ip-addr {		leaf bdr-ip-addr {
	type inet:ip-address;		type inet:ip-address;
			config false;
	description		description
	"Neighbor's Backup Designated Router (BDR) IP Address.";		"Neighbor's Backup Designated Router (BDR) IP Address.";
	}		}
	leaf state {		leaf state {
	type nbr-state-type;		type nbr-state-type;
			config false;
	description		description
	"OSPF neighbor state.";		"OSPF neighbor state.";
	}		}
	leaf dead-timer {		leaf dead-timer {
	type uint32;		type uint32;
	units "seconds";		units "seconds";
			config false;
	description "This timer tracks the remaining time before		description "This timer tracks the remaining time before
	the neighbor is declared dead.";		the neighbor is declared dead.";
	}		}
	container statistics {		container statistics {
			config false;
	description "Per neighbor statistics";		description "Per neighbor statistics";
	uses neighbor-stat;		uses neighbor-stat;
	}		}
	}		}
	grouping interface-common-operation {		grouping interface-common-state {
	description		description
	"OSPF interface common operation state.";		"OSPF interface common operational state.";
	reference "RFC2328 Section 9";		reference "RFC2328 Section 9";
	leaf state {		leaf state {
	type if-state-type;		type if-state-type;
			config false;
	description "Interface state.";		description "Interface state.";
	}		}
	leaf hello-timer {		leaf hello-timer {
	type uint32;		type uint32;
	units "seconds";		units "seconds";
			config false;
	description "This timer tracks the remaining time before		description "This timer tracks the remaining time before
	the next hello packet is sent.";		the next hello packet is sent.";
	}		}
	leaf wait-timer {		leaf wait-timer {
	type uint32;		type uint32;
	units "seconds";		units "seconds";
			config false;
	description "This timer tracks the remaining time before		description "This timer tracks the remaining time before
	the interface exits the Waiting state.";		the interface exits the Waiting state.";
	}		}
	leaf dr-router-id {		leaf dr-router-id {
	type rt-types:router-id;		type rt-types:router-id;
			config false;
	description "Designated Router (DR) router ID.";		description "Designated Router (DR) router ID.";
	}		}
	leaf dr-ip-addr {		leaf dr-ip-addr {
	type inet:ip-address;		type inet:ip-address;
			config false;
	description "Designated Router (DR) IP address.";		description "Designated Router (DR) IP address.";
	}		}
	leaf bdr-router-id {		leaf bdr-router-id {
	type rt-types:router-id;		type rt-types:router-id;
			config false;
	description "Backup Designated Router (BDR) router ID.";		description "Backup Designated Router (BDR) router ID.";
	}		}
	leaf bdr-ip-addr {		leaf bdr-ip-addr {
	type inet:ip-address;		type inet:ip-address;
			config false;
	description "Backup Designated Router (BDR) IP Address.";		description "Backup Designated Router (BDR) IP Address.";
	}		}
	container statistics {		container statistics {
			config false;
	description "Per interface statistics";		description "Per interface statistics";
	uses interface-stat;		uses interface-stat;
	}		}
	container neighbors {		container neighbors {
			config false;
	description "All neighbors for the interface.";		description "All neighbors for the interface.";
	list neighbor {		list neighbor {
	key "neighbor-router-id";		key "neighbor-router-id";
	description		description
	"List of OSPF neighbors.";		"List of OSPF neighbors.";
	leaf neighbor-router-id {		leaf neighbor-router-id {
	type rt-types:router-id;		type rt-types:router-id;
	description		description
	"Neighbor router ID.";		"Neighbor router ID.";
	}		}
	uses neighbor-operation;		uses neighbor-state;
	} // list of OSPF neighbors		} // list of OSPF neighbors
	}		}
	} // interface-common-operation
	grouping interface-operation {
	description
	"OSPF interface operation state.";
	reference "RFC2328 Section 9";
	uses interface-common-operation;
	container database {		container database {
			config false;
	description "Link scope LSA database.";		description "Link scope LSA database.";
	list link-scope-lsa-type {		list link-scope-lsa-type {
	key "lsa-type";		key "lsa-type";
	description		description
	"List OSPF link scope LSA databases.";		"List OSPF link scope LSA databases.";
	leaf lsa-type {		leaf lsa-type {
	type uint16;		type uint16;
	description "OSPF link scope LSA type.";		description "OSPF link scope LSA type.";
	}		}
	container link-scope-lsas {		container link-scope-lsas {
	skipping to change at page 62, line 24 ¶		skipping to change at page 68, line 13 ¶
	must "../../../../../../../../../../../"		must "../../../../../../../../../../../"
	+ "rt:type = 'ospf:ospfv3'" {		+ "rt:type = 'ospf:ospfv3'" {
	description "OSPFv3 LSA.";		description "OSPFv3 LSA.";
	}		}
	}		}
	}		}
	}		}
	}		}
	} // list link-scope-lsas		} // list link-scope-lsas
	}		}
			} // interface-common-state
			grouping interface-state {
			description
			"OSPF interface operational state.";
			reference "RFC2328 Section 9";
			uses interface-common-state;
	}		}
	grouping virtual-link-config {		grouping virtual-link-config {
	description		description
	"OSPF virtual link configuration state.";		"OSPF virtual link configuration state.";
	uses interface-common-config;		uses interface-common-config;
	}		}
	grouping virtual-link-operation {		grouping virtual-link-state {
	description		description
	"OSPF virtual link operation state.";		"OSPF virtual link operational state.";
	leaf cost {		leaf cost {
	type uint16 {		type uint16 {
	range "1..65535";		range "1..65535";
	}		}
			config false;
	description		description
	"Virtual link interface cost.";		"Virtual link interface cost.";
	}		}
	uses interface-common-operation;		uses interface-common-state;
	}		}
	grouping sham-link-config {		grouping sham-link-config {
	description		description
	"OSPF sham link configuration state.";		"OSPF sham link configuration state.";
	uses interface-common-config;		uses interface-common-config;
	uses interface-physical-link-config;		uses interface-physical-link-config;
	}		}
			grouping sham-link-state {
	grouping sham-link-operation {
	description		description
	"OSPF sham link operation state.";		"OSPF sham link operational state.";
			/* All container/leaf should be config false. */
	uses interface-common-operation;		uses interface-common-state;
	}		}
	grouping af-area-config {		grouping af-area-config {
	description		description
	"OSPF address-family specific area config state.";		"OSPF address-family specific area config state.";
	container ranges {		container ranges {
	description "Container for summary ranges";		description "Container for summary ranges";
	list range {		list range {
	skipping to change at page 64, line 34 ¶		skipping to change at page 70, line 31 ¶
	description		description
	"Set the summary default route cost for a		"Set the summary default route cost for a
	stub or NSSA area.";		stub or NSSA area.";
	}		}
	}		}
	grouping area-config {		grouping area-config {
	description		description
	"OSPF area configuration state.";		"OSPF area configuration state.";
	container all-interfaces-inherit {
	if-feature interface-inheritance;
	description
	"Inheritance for all interfaces";
	container interface {
	description
	"Interface config to be inherited by all
	interfaces in the area.";
	}
	}
	leaf area-type {		leaf area-type {
	type identityref {		type identityref {
	base area-type;		base area-type;
	}		}
	default normal;		default normal;
	description		description
	"Area type.";		"Area type.";
	}		}
	uses area-common-config;		uses area-common-config;
	uses af-area-config {		uses af-area-config {
	when "../../../operation-mode = "		when "../../../operation-mode = "
	+ "'ospf:ships-in-the-night'" {		+ "'ospf:ships-in-the-night'" {
	description		description
	"Ships in the night configuration.";		"Ships in the night configuration.";
	}		}
	skipping to change at page 65, line 18 ¶		skipping to change at page 70, line 51 ¶
	uses af-area-config {		uses af-area-config {
	when "../../../operation-mode = "		when "../../../operation-mode = "
	+ "'ospf:ships-in-the-night'" {		+ "'ospf:ships-in-the-night'" {
	description		description
	"Ships in the night configuration.";		"Ships in the night configuration.";
	}		}
	}		}
	}		}
	grouping area-operation {		grouping area-state {
	description		description
	"OSPF area operation state.";		"OSPF area operational state.";
	container statistics {		container statistics {
			config false;
	description "Per area statistics";		description "Per area statistics";
	uses area-stat;		uses area-stat;
	}		}
	container database {		container database {
			config false;
	description "Area scope LSA database.";		description "Area scope LSA database.";
	list area-scope-lsa-type {		list area-scope-lsa-type {
	key "lsa-type";		key "lsa-type";
	description "List OSPF area scope LSA databases.";		description "List OSPF area scope LSA databases.";
	leaf lsa-type {		leaf lsa-type {
	type uint16;		type uint16;
	description "OSPF area scope LSA type.";		description "OSPF area scope LSA type.";
	}		}
	container area-scope-lsas {		container area-scope-lsas {
	description		description
	skipping to change at page 66, line 18 ¶		skipping to change at page 72, line 6 ¶
	}		}
	}		}
	}		}
	} // list area-scope-lsas		} // list area-scope-lsas
	}		}
	}		}
	grouping local-rib {		grouping local-rib {
	description "Local-rib grouping.";		description "Local-rib grouping.";
	container local-rib {		container local-rib {
			config false;
	description "Local-rib.";		description "Local-rib.";
	list route {		list route {
	key "prefix";		key "prefix";
	description "Routes";		description "Routes";
	leaf prefix {		leaf prefix {
	type inet:ip-prefix;		type inet:ip-prefix;
	description "Destination prefix.";		description "Destination prefix.";
	}		}
	container next-hops {		container next-hops {
	description "All next hops for the route.";		description "All next hops for the route.";
	skipping to change at page 67, line 46 ¶		skipping to change at page 73, line 35 ¶
	type uint16;		type uint16;
	units msec;		units msec;
	description		description
	"Duration used to learn all the IGP events		"Duration used to learn all the IGP events
	related to a single component failure.";		related to a single component failure.";
	}		}
	description		description
	"Grouping for IETF SPF delay configuration.";		"Grouping for IETF SPF delay configuration.";
	}		}
	grouping ietf-spf-delay-operation {		grouping ietf-spf-delay-state {
	leaf current-state {		leaf current-state {
	type enumeration {		type enumeration {
	enum "QUIET" {		enum "QUIET" {
	description "QUIET state";		description "QUIET state";
	}		}
	enum "SHORT_WAIT" {		enum "SHORT_WAIT" {
	description "SHORT_WAIT state";		description "SHORT_WAIT state";
	}		}
	enum "LONG_WAIT" {		enum "LONG_WAIT" {
	description "LONG_WAIT state";		description "LONG_WAIT state";
	}		}
	}		}
	description		config false;
	"Current state of the algorithm.";		description
			"Current state of the algorithm.";
	}		}
	leaf remaining-time-to-learn {		leaf remaining-time-to-learn {
	type uint16;		type uint16;
	units "seconds";		units "seconds";
			config false;
	description		description
	"Remaining time until time-to-learn timer fires.";		"Remaining time until time-to-learn timer fires.";
	}		}
	leaf remaining-hold-down {		leaf remaining-hold-down {
	type uint16;		type uint16;
	units "seconds";		units "seconds";
			config false;
	description		description
	"Remaining time until hold-down timer fires.";		"Remaining time until hold-down timer fires.";
	}		}
	leaf last-event-received {		leaf last-event-received {
	type yang:timestamp;		type yang:timestamp;
			config false;
	description		description
	"Time of last IGP event received";		"Time of last IGP event received";
	}		}
	leaf next-spf-time {		leaf next-spf-time {
	type yang:timestamp;		type yang:timestamp;
			config false;
	description		description
	"Time when next SPF has been scheduled.";		"Time when next SPF has been scheduled.";
	}		}
	leaf last-spf-time {		leaf last-spf-time {
	type yang:timestamp;		type yang:timestamp;
			config false;
	description		description
	"Time of last SPF computation.";		"Time of last SPF computation.";
	}		}
	description		description
	"Grouping for IETF SPF delay operational states.";		"Grouping for IETF SPF delay operational states.";
	}		}
	grouping node-tag-config {		grouping node-tag-config {
	description		description
	"OSPF node tag config state.";		"OSPF node tag config state.";
	skipping to change at page 69, line 21 ¶		skipping to change at page 75, line 16 ¶
	}		}
	description		description
	"Container for node tags.";		"Container for node tags.";
	}		}
	}		}
	grouping instance-config {		grouping instance-config {
	description		description
	"OSPF instance config state.";		"OSPF instance config state.";
	container all-areas-inherit {
	if-feature area-inheritance;
	description
	"Inheritance for all areas.";
	container area {
	description
	"Area config to be inherited by all areas.";
	}
	container interface {
	description
	"Interface config to be inherited by all interfaces
	in all areas.";
	}
	}
	leaf explicit-router-id {		leaf explicit-router-id {
	if-feature explicit-router-id;		if-feature explicit-router-id;
	type rt-types:router-id;		type rt-types:router-id;
	description		description
	"Defined in RFC 2328. A 32-bit number		"Defined in RFC 2328. A 32-bit number
	that uniquely identifies the router.";		that uniquely identifies the router.";
	}		}
	container preference {		container preference {
	description "Route preference config state.";		description "Route preference config state.";
	skipping to change at page 74, line 13 ¶		skipping to change at page 79, line 42 ¶
	type boolean;		type boolean;
	description		description
	"Enable LDP IGP synchronization.";		"Enable LDP IGP synchronization.";
	}		}
	}		}
	}		}
	uses instance-fast-reroute-config;		uses instance-fast-reroute-config;
	uses node-tag-config;		uses node-tag-config;
	}		}
	grouping instance-operation {		grouping instance-state {
	description		description
	"OSPF Address Family operation state.";		"OSPF instance operational state.";
	leaf router-id {		leaf router-id {
	type rt-types:router-id;		type rt-types:router-id;
			config false;
	description		description
	"Defined in RFC 2328. A 32-bit number		"Defined in RFC 2328. A 32-bit number
	that uniquely identifies the router.";		that uniquely identifies the router.";
	}		}
	uses local-rib;		uses local-rib;
	container statistics {		container statistics {
			config false;
	description "Per instance statistics";		description "Per instance statistics";
	uses instance-stat;		uses instance-stat;
	}		}
	container ietf-spf-delay {		container ietf-spf-delay {
	if-feature ietf-spf-delay;		if-feature ietf-spf-delay;
			config false;
	uses ietf-spf-delay-config;		uses ietf-spf-delay-config;
	uses ietf-spf-delay-operation;		uses ietf-spf-delay-state;
	description		description
	"IETF SPF delay operational states.";		"IETF SPF delay operational states.";
	}		}
	container database {		container database {
			config false;
	description "AS scope LSA database.";		description "AS scope LSA database.";
	list as-scope-lsa-type {		list as-scope-lsa-type {
	key "lsa-type";		key "lsa-type";
	description "List OSPF AS scope LSA databases.";		description "List OSPF AS scope LSA databases.";
	leaf lsa-type {		leaf lsa-type {
	type uint16;		type uint16;
	description "OSPF AS scope LSA type.";		description "OSPF AS scope LSA type.";
	}		}
	container as-scope-lsas {		container as-scope-lsas {
	description "All AS scope of LSA of this LSA type.";		description "All AS scope of LSA of this LSA type.";
	skipping to change at page 75, line 21 ¶		skipping to change at page 81, line 4 ¶
	}		}
	}		}
	refine "version/ospfv3/ospfv3" {		refine "version/ospfv3/ospfv3" {
	must "../../../../../../../rt:type = "		must "../../../../../../../rt:type = "
	+ "'ospf:ospfv3'" {		+ "'ospf:ospfv3'" {
	description "OSPFv3 LSA.";		description "OSPFv3 LSA.";
	}		}
	}		}
	}		}
	}		}
	}		}
	} // list as-scope-lsas		} // list as-scope-lsas
	}		}
			uses spf-log;
			uses lsa-log;
	}		}
	grouping ospf-config {		grouping ospf-config {
	description		description
	"OSPF top configuration state.";		"OSPF top configuration state.";
	container all-instances-inherit {
	if-feature instance-inheritance;
	description
	"Inheritance support to all instances.";
	container area {
	description
	"Area config to be inherited by all areas
	in all instances.";
	}
	container interface {
	description
	"Interface config to be inherited by all
	interfaces in all instances.";
	}
	}
	leaf operation-mode {		leaf operation-mode {
	type identityref {		type identityref {
	base operation-mode;		base operation-mode;
	}		}
	default ospf:ships-in-the-night;		default ospf:ships-in-the-night;
	description		description
	"OSPF operation mode.";		"OSPF operation mode.";
	}		}
	}		}
	grouping ospf-operation {		grouping ospf-state {
			/* All leaf/container must be config false. */
	description		description
	"OSPF top operation state.";		"OSPF top operational state.";
	}		}
	grouping multi-topology-area-common-config {		grouping multi-topology-area-common-config {
	description		description
	"OSPF multi-topology area common configuration state.";		"OSPF multi-topology area common configuration state.";
	leaf summary {		leaf summary {
	when "../../../../../areas/area[area-id=current()/../area-id]/"		when "../../../../../areas/area[area-id=current()/../area-id]/"
	+ "area-type = 'ospf:stub' or "		+ "area-type = 'ospf:stub' or "
	+ "../../../../../areas/area[area-id=current()/../area-id]/"		+ "../../../../../areas/area[area-id=current()/../area-id]/"
	+ "area-type = 'ospf:nssa'" {		+ "area-type = 'ospf:nssa'" {
	skipping to change at page 77, line 4 ¶		skipping to change at page 82, line 23 ¶
	"Set the summary default route cost for a		"Set the summary default route cost for a
	stub or NSSA area.";		stub or NSSA area.";
	}		}
	}		}
	grouping multi-topology-area-config {		grouping multi-topology-area-config {
	description		description
	"OSPF multi-topology area configuration state.";		"OSPF multi-topology area configuration state.";
	uses multi-topology-area-common-config;		uses multi-topology-area-common-config;
	uses af-area-config {		uses af-area-config {
	when "../../../../../operation-mode = "		when "../../../../../operation-mode = "
	+ "'ospf:ships-in-the-night'" {		+ "'ospf:ships-in-the-night'" {
	description		description
	"Ships in the night configuration.";		"Ships in the night configuration.";
	}		}
	}		}
	}		}
	grouping multi-topology-area-operation {		grouping multi-topology-area-state {
			/* All leaf/container must be config false. */
	description		description
	"OSPF multi-topology area operation state.";		"OSPF multi-topology area operational state.";
	}		}
	grouping multi-topology-config {		grouping multi-topology-config {
	description		description
	"OSPF multi-topology configuration state.";		"OSPF multi-topology configuration state.";
	}		}
	grouping multi-topology-operation {		grouping multi-topology-state {
			/* All leaf/container must be config false. */
	description		description
	"OSPF multi-topology operation state.";		"OSPF multi-topology operational state.";
	uses local-rib;		uses local-rib;
	}		}
	grouping multi-topology-interface-config {		grouping multi-topology-interface-config {
	description		description
	"OSPF multi-topology configuration state.";		"OSPF multi-topology configuration state.";
	leaf cost {		leaf cost {
	type uint32;		type uint32;
	description		description
	"Interface cost for this topology.";		"Interface cost for this topology.";
	}		}
	}		}
	grouping multi-topology-interface-operation {		grouping multi-topology-interface-state {
			/* All leaf/container must be config false. */
	description		description
	"OSPF multi-topology operation state.";		"OSPF multi-topology operational state.";
	}		}
	grouping ospfv3-interface-config {		grouping ospfv3-interface-config {
	description		description
	"OSPFv3 interface specific configuration state.";		"OSPFv3 interface specific configuration state.";
	leaf instance-id {		leaf instance-id {
	type uint8 {		type uint8 {
	range "0 .. 31";		range "0 .. 31";
	}		}
	description		description
	"OSPFv3 instance ID.";		"OSPFv3 instance ID.";
	}		}
	}		}
	grouping ospfv3-interface-operation {		grouping ospfv3-interface-state {
	description		description
	"OSPFv3 interface specific operation state.";		"OSPFv3 interface specific operational state.";
	leaf interface-id {		leaf interface-id {
	type uint16;		type uint16;
			config false;
	description		description
	"OSPFv3 interface ID.";		"OSPFv3 interface ID.";
	}		}
	}		}
			grouping lsa-identifiers {
			description
			"The parameters that uniquely identify an LSA.";
			leaf area-id {
			type area-id-type;
			description
			"Area ID";
			}
			leaf link-id {
			type union {
			type inet:ipv4-address;
			type yang:dotted-quad;
			}
			description "Link ID.";
			}
			leaf type {
			type uint16;
			description
			"LSA type.";
			}
			leaf lsa-id {
			type yang:dotted-quad;
			description "LSA ID.";
			}
			leaf adv-router {
			type yang:dotted-quad;
			description
			"LSA advertising router.";
			}
			leaf seq-num {
			type uint32;
			description
			"LSA sequence number.";
			}
			}
			grouping spf-log {
			description
			"Grouping for SPF log.";
			container spf-log {
			config false;
			description
			"This container lists the SPF log.";
			list event {
			key id;
			description
			"List of SPF logs.
			It is used as a wrapping buffer.";
			leaf id {
			type uint32;
			description
			"This leaf defines the event identifier.
			This is a purely internal value.";
			}
			leaf spf-type {
			type enumeration {
			enum full {
			description
			"Computation done is a Full SPF.";
			}
			enum intra {
			description
			"Computation done is only for intra-area routes.";
			}
			enum inter {
			description
			"Computation done is only for inter-area
			summary routes.";
			}
			enum external {
			description
			"Computation done is only for AS external routes.";
			}
			}
			description
			"The SPF computation type.";
			}
			leaf schedule-timestamp {
			type yang:timestamp;
			description
			"This leaf describes the timestamp
			when the computation was scheduled.";
			}
			leaf start-timestamp {
			type yang:timestamp;
			description
			"This leaf describes the timestamp
			when the computation was started.";
			}
			leaf end-timestamp {
			type yang:timestamp;
			description
			"This leaf describes the timestamp
			when the computation was completed.";
			}
			list trigger-lsa {
			description
			"The list of LSAs that triggered the computation.";
			uses lsa-identifiers;
			}
			}
			}
			}
			grouping lsa-log {
			description
			"Grouping for LSA log.";
			container lsa-log {
			config false;
			description
			"This conatiner lists the LSA log.
			Local LSA modifications are also included
			in the list.";
			list event {
			key id;
			description
			"List of LSA logs.
			It is used as a wrapping buffer.";
			leaf id {
			type uint32;
			description
			"This leaf defines the event identifier.
			This is a purely internal value.";
			}
			container lsa {
			description
			"This container describes the logged LSA.";
			uses lsa-identifiers;
			}
			leaf received-timestamp {
			type yang:timestamp;
			description
			"This leaf describes the timestamp
			when the LSA was received. In case of
			local LSA update, the timestamp refers
			to the local LSA update time.";
			}
			leaf reason {
			type identityref {
			base lsa-log-reason;
			}
			description
			"This leaf describes the reason
			that resulted in this LSA log.";
			}
			}
			}
			}
	augment "/rt:routing/rt:control-plane-protocols/"		augment "/rt:routing/rt:control-plane-protocols/"
	+ "rt:control-plane-protocol" {		+ "rt:control-plane-protocol" {
	when "rt:type = 'ospf:ospfv2' or rt:type = 'ospf:ospfv3'" {		when "rt:type = 'ospf:ospfv2' or rt:type = 'ospf:ospfv3'" {
	description		description
	"This augmentation is only valid for a routing protocol		"This augmentation is only valid for a routing protocol
	instance of OSPF (type 'ospfv2' or 'ospfv3').";		instance of OSPF (type 'ospfv2' or 'ospfv3').";
	}		}
	description "OSPF augmentation.";		description "OSPF augmentation.";
	container ospf {		container ospf {
	description		description
	"OSPF.";		"OSPF.";
	uses ospf-config;		uses ospf-config;
			uses ospf-state;
	list instance {		list instance {
	key "af";		key "af";
	description		description
	"An OSPF routing protocol instance.";		"An OSPF routing protocol instance.";
	leaf af {		leaf af {
	type identityref {		type identityref {
	base rt-types:address-family;		base iana-rt-types:address-family;
	}		}
	description		description
	"Address-family of the instance.";		"Address-family of the instance.";
	}		}
	uses instance-config;		uses instance-config;
			uses instance-state;
	container areas {		container areas {
	description "All areas.";		description "All areas.";
	list area {		list area {
	key "area-id";		key "area-id";
	description		description
	"List of OSPF areas";		"List of OSPF areas";
	leaf area-id {		leaf area-id {
	type area-id-type;		type area-id-type;
	description		description
	"Area ID.";		"Area ID.";
	}		}
	uses area-config;		uses area-config;
			uses area-state;
	container virtual-links {		container virtual-links {
	when "../area-id = '0.0.0.0' and "		when "../area-id = '0.0.0.0' and "
	+ "../area-type = 'ospf:normal'" {		+ "../area-type = 'ospf:normal'" {
	description		description
	"Virutal links must be in backbone area.";		"Virtual links must be in backbone area.";
	}		}
	description "All virtual links.";		description "All virtual links.";
	list virtual-link {		list virtual-link {
	key "transit-area-id router-id";		key "transit-area-id router-id";
	description		description
	"OSPF virtual link";		"OSPF virtual link";
	leaf transit-area-id {		leaf transit-area-id {
	type leafref {		type leafref {
	path "../../../area-id";		path "../../../../area/area-id";
	}		}
	must "current() != '0.0.0.0'" {		must "../../../../area[area-id=current()]/"
			+ "area-id != '0.0.0.0' and "
			+ "../../../../area[area-id=current()]/"
			+ "area-type = 'ospf:normal'" {
	error-message "Virtual link transit area must "		error-message "Virtual link transit area must "
	+ "be non-zero.";		+ "be non-zero.";
	description		description
	"Virtual-link trasit area must be		"Virtual-link trasit area must be
	non-zero area.";		non-zero area.";
	}		}
	description		description
	"Virtual link tranist area ID.";		"Virtual link tranist area ID.";
	}		}
	leaf router-id {		leaf router-id {
	type rt-types:router-id;		type rt-types:router-id;
	description		description
	"Virtual Link remote endpoint router ID.";		"Virtual Link remote endpoint router ID.";
	}		}
	uses virtual-link-config;		uses virtual-link-config;
			uses virtual-link-state;
	}		}
	}		}
	container sham-links {		container sham-links {
	if-feature pe-ce-protocol;		if-feature pe-ce-protocol;
	description "All sham links.";		description "All sham links.";
	list sham-link {		list sham-link {
	key "local-id remote-id";		key "local-id remote-id";
	description		description
	"OSPF sham link";		"OSPF sham link";
	leaf local-id {		leaf local-id {
	type inet:ip-address;		type inet:ip-address;
	description		description
	"Address of the local Sham Link endpoint.";		"Address of the local Sham Link endpoint.";
	}		}
	leaf remote-id {		leaf remote-id {
	type inet:ip-address;		type inet:ip-address;
	description		description
	"Address of the remote Sham Link endpoint.";		"Address of the remote Sham Link endpoint.";
	}		}
	uses sham-link-config;		uses sham-link-config;
			uses sham-link-state;
	}		}
	}		}
	container interfaces {		container interfaces {
	description "All interfaces.";		description "All interfaces.";
	list interface {		list interface {
	key "name";		key "name";
	description		description
	"List of OSPF interfaces.";		"List of OSPF interfaces.";
	leaf name {		leaf name {
	type if:interface-ref;		type if:interface-ref;
	description		description
	"Interface name.";		"Interface name.";
	}		}
	uses interface-config;		uses interface-config;
			uses interface-state;
	} // list of interfaces		} // list of interfaces
	}		}
	} // list of areas		} // list of areas
	}		}
	} // list of instance		} // list of instance
	} // container ospf		} // container ospf
	}		}
	augment "/rt:routing/rt:control-plane-protocols/"		augment "/rt:routing/rt:control-plane-protocols/"
	+ "rt:control-plane-protocol/ospf:ospf/ospf:instance" {		+ "rt:control-plane-protocol/ospf:ospf/ospf:instance" {
	skipping to change at page 81, line 23 ¶		skipping to change at page 90, line 11 ¶
	key "name";		key "name";
	description "OSPF topology.";		description "OSPF topology.";
	leaf name {		leaf name {
	type leafref {		type leafref {
	path "../../../../../../../rt:ribs/rt:rib/rt:name";		path "../../../../../../../rt:ribs/rt:rib/rt:name";
	}		}
	description "RIB";		description "RIB";
	}		}
	uses multi-topology-config;		uses multi-topology-config;
			uses multi-topology-state;
	container areas {		container areas {
	description "All areas in the topology.";		description "All areas in the topology.";
	list area {		list area {
	key "area-id";		key "area-id";
	description		description
	"List of OSPF areas";		"List of OSPF areas";
	leaf area-id {		leaf area-id {
	type area-id-type;		type area-id-type;
	description		description
	"Area ID.";		"Area ID.";
	}		}
	uses multi-topology-area-config;		uses multi-topology-area-config;
			uses multi-topology-area-state;
	}		}
	}		}
	}		}
	}		}
	}		}
	augment "/rt:routing/rt:control-plane-protocols/"		augment "/rt:routing/rt:control-plane-protocols/"
	+ "rt:control-plane-protocol/ospf:ospf/ospf:instance/"		+ "rt:control-plane-protocol/ospf:ospf/ospf:instance/"
	+ "ospf:areas/ospf:area/ospf:interfaces/ospf:interface" {		+ "ospf:areas/ospf:area/ospf:interfaces/ospf:interface" {
	when "../../../../../../rt:type = 'ospf:ospfv2'" {		when "../../../../../../rt:type = 'ospf:ospfv2'" {
	skipping to change at page 82, line 14 ¶		skipping to change at page 91, line 4 ¶
	augmentation.";		augmentation.";
	container topologies {		container topologies {
	description "All topologies for the interface.";		description "All topologies for the interface.";
	list topology {		list topology {
	key "name";		key "name";
	description "OSPF interface topology.";		description "OSPF interface topology.";
	leaf name {		leaf name {
	type leafref {		type leafref {
	path "../../../../../../../../../../../"		path "../../../../../../../../../../../"
	+ "rt:ribs/rt:rib/rt:name";		+ "rt:ribs/rt:rib/rt:name";
	}		}
	description		description
	"One of the topologies enabled on this interface.";		"One of the topologies enabled on this interface.";
	}		}
	uses multi-topology-interface-config;		uses multi-topology-interface-config;
			uses multi-topology-interface-state;
	}		}
	}		}
	}		}
	augment "/rt:routing/rt:control-plane-protocols/"		augment "/rt:routing/rt:control-plane-protocols/"
	+ "rt:control-plane-protocol/ospf:ospf/ospf:instance/"		+ "rt:control-plane-protocol/ospf:ospf/ospf:instance/"
	+ "ospf:areas/ospf:area/ospf:interfaces/ospf:interface" {		+ "ospf:areas/ospf:area/ospf:interfaces/ospf:interface" {
	when "../../../../../../rt:type = 'ospf:ospfv3'" {		when "../../../../../../rt:type = 'ospf:ospfv3'" {
	description		description
	"This augmentation is only valid for OSPFv3.";		"This augmentation is only valid for OSPFv3.";
	}		}
	description		description
	"OSPFv3 interface specific configuration state		"OSPFv3 interface specific configuration state
	augmentation.";		augmentation.";
	uses ospfv3-interface-config;		uses ospfv3-interface-config;
	}		uses ospfv3-interface-state;
	augment "/rt:routing-state/"
	+ "rt:control-plane-protocols/rt:control-plane-protocol" {
	when "rt:type = 'ospf:ospfv2' or "
	+ "rt:type = 'ospf:ospfv3'" {
	description
	"This augmentation is only valid for a routing protocol
	instance of type 'ospfv2' or 'ospfv3'.";
	}
	description
	"OSPF operational state.";
	container ospf {
	description "OSPF";
	uses ospf-config;
	uses ospf-operation;
	list instance {
	key "af";
	description
	"An OSPF routing protocol instance.";
	leaf af {
	type identityref {
	base rt-types:address-family;
	}
	description
	"Address-family of the instance.";
	}
	uses instance-config;
	uses instance-operation;
	container areas {
	description "All areas";
	list area {
	key "area-id";
	description "List of OSPF areas";
	leaf area-id {
	type area-id-type;
	description "Area ID.";
	}
	uses area-config;
	uses area-operation;
	container virtual-links {
	description "All virtual links.";
	list virtual-link {
	description
	"OSPF virtual link";
	leaf transit-area-id {
	type leafref {
	path "../../../area-id";
	}
	description
	"Virutal link transit area ID.";
	}
	leaf router-id {
	type rt-types:router-id;
	description
	"Virtual link router ID.";
	}
	uses virtual-link-config;
	uses virtual-link-operation;
	}
	}
	container sham-links {
	description "All sham links.";
	list sham-link {
	description
	"OSPF sham link";
	leaf local-id {
	type inet:ip-address;
	description
	"Address of the local Sham Link endpoint.";
	}
	leaf remote-id {
	type inet:ip-address;
	description
	"Address of the remote Sham Link endpoint.";
	}
	uses sham-link-config;
	uses sham-link-operation;
	}
	}
	container interfaces {
	description "All interfaces in the area.";
	list interface {
	key "name";
	description
	"List of OSPF interfaces.";
	leaf name {
	// Should it refer to config state leaf?
	type if:interface-ref;
	description "Interface name.";
	}
	uses interface-config;
	uses interface-operation;
	} // list of OSPF interfaces
	}
	} // list of OSPF areas
	}
	} // list of instances
	} // container ospf
	}
	augment "/rt:routing-state/"
	+ "rt:control-plane-protocols/rt:control-plane-protocol/"
	+ "ospf:ospf/ospf:instance" {
	when "../../rt:type = 'ospf:ospfv2'" {
	description
	"This augmentation is only valid for OSPFv2.";
	}
	if-feature multi-topology;
	description
	"OSPF multi-topology instance operation state
	augmentation.";
	container topologies {
	description "All topologies.";
	list topology {
	// Topology must be in the same routing-instance
	// and of same AF as the container.
	key "name";
	description "OSPF topology.";
	leaf name {
	type leafref {
	path "../../../../../../../"
	+ "rt:ribs/rt:rib/rt:name";
	}
	description "RIB";
	}
	uses multi-topology-config;
	uses multi-topology-operation;
	container areas {
	description "All areas in the topology.";
	list area {
	key "area-id";
	description
	"List of OSPF areas";
	leaf area-id {
	type area-id-type;
	description
	"Area ID.";
	}
	uses multi-topology-area-config;
	uses multi-topology-area-operation;
	}
	}
	}
	}
	}
	augment "/rt:routing-state/"
	+ "rt:control-plane-protocols/rt:control-plane-protocol/"
	+ "ospf:ospf/ospf:instance/ospf:areas/ospf:area/"
	+ "ospf:interfaces/ospf:interface" {
	when "../../../../../../rt:type = 'ospf:ospfv2'" {
	description
	"This augmentation is only valid for OSPFv2.";
	}
	if-feature ospf:multi-topology;
	description
	"OSPF multi-topology interface operation state
	augmentation.";
	container topologies {
	description "All topologies.";
	list topology {
	key "name";
	description "OSPF interface topology.";
	leaf name {
	type leafref {
	path "../../../../../../../../../../../"
	+ "rt:ribs/rt:rib/rt:name";
	}
	description
	"One of the topologies enabled on this interface.";
	}
	uses multi-topology-interface-config;
	uses multi-topology-interface-operation;
	}
	}
	}
	augment "/rt:routing-state/"
	+ "rt:control-plane-protocols/rt:control-plane-protocol/"
	+ "ospf:ospf/ospf:instance/ospf:areas/ospf:area/"
	+ "ospf:interfaces/ospf:interface" {
	when "../../../../../../rt:type = 'ospf:ospfv3'" {
	description
	"This augmentation is only valid for OSPFv3.";
	}
	description
	"OSPFv3 interface specific operation state
	augmentation.";
	uses ospfv3-interface-config;
	uses ospfv3-interface-operation;
	}		}
	grouping route-content {		grouping route-content {
	description		description
	"This grouping defines OSPF-specific route attributes.";		"This grouping defines OSPF-specific route attributes.";
	leaf metric {		leaf metric {
	type uint32;		type uint32;
	description "OSPF route metric.";		description "OSPF route metric.";
	}		}
	leaf tag {		leaf tag {
	skipping to change at page 95, line 37 ¶		skipping to change at page 100, line 19 ¶
	description		description
	"This notification is sent when the graceful restart		"This notification is sent when the graceful restart
	state for the router has changed.";		state for the router has changed.";
	}		}
	}		}
	<CODE ENDS>		<CODE ENDS>
	4. Security Considerations		4. Security Considerations
	The data model defined does not create any security implications.		The YANG module defined in this document is designed to be accessed
			via network management protocols such as NETCONF [RFC6241] or
			RESTCONF [RFC8040]. The lowest NETCONF layer is the secure transport
			layer, and the mandatory-to-implement secure transport is Secure
			Shell (SSH) [RFC6242]. The lowest RESTCONF layer is HTTPS, and the
			mandatory-to-implement secure transport is TLS [RFC5246].
	This draft does not change any underlying security issues inherent in		The NETCONF access control model [RFC6536] provides the means to
	[RFC8022].		restrict access for particular NETCONF or RESTCONF users to a pre-
			configured subset of all available NETCONF or RESTCONF protocol
			operations and content.
			There are a number of data nodes defined in this YANG module that are
			writable/creatable/deletable (i.e., config true, which is the
			default). These data nodes may be considered sensitive or vulnerable
			in some network environments. Write operations (e.g., edit-config)
			to these data nodes without proper protection can have a negative
			effect on network operations. For OSPF, the ability to modify OSPF
			configuration will allow the entire OSPF domain to be compromised
			including peering with unauthorized routers to misroute traffic or
			mount a massive Denial-of-Service (DoS) attack. The security
			considerations of OSPFv2 [RFC2328] and [RFC5340].
			Some of the readable data nodes in this YANG module may be considered
			sensitive or vulnerable in some network environments. It is thus
			important to control read access (e.g., via get, get-config, or
			notification) to these data nodes. The exposure of the Link State
			Database (LSDB) will expose the detailed topology of the network.
			This may be undesirable since both due to the fact that exposure may
			facilitate other attacks. Additionally, network operators may
			consider their topologies to be propritary.
			For OSPF authentication, configuration is supported via the
			specification of key-chains [RFC8177] or the direct specification of
			key and authentication algorithm. Hence, authentification
			configuration using the "auth-table-trailer" case in the
			"authentication" container inherits the security considerations of
			[RFC8177]. This includes the considerations with respect to the
			local storage and handling of authentication keys.
			Some of the RPC operations in this YANG module may be considered
			sensitive or vulnerable in some network environments. It is thus
			important to control access to these operations. The OSPF Yang
			module support the "clear-neighbor" and "clear-database" RPCs. If
			access too either of these is compromised, they can result in
			temporary network outages be employed to mount DoS attacks.
	5. Acknowledgements		5. Acknowledgements
	The authors wish to thank Yi Yang, Alexander Clemm, Gaurav Gupta,		The authors wish to thank Yi Yang, Alexander Clemm, Gaurav Gupta,
	Ladislav Lhotka, Stephane Litkowski, Greg Hankins, Manish Gupta and		Ladislav Lhotka, Stephane Litkowski, Greg Hankins, Manish Gupta and
	Alan Davey for their thorough reviews and helpful comments.		Alan Davey for their thorough reviews and helpful comments.
	This document was produced using Marshall Rose's xml2rfc tool.		This document was produced using Marshall Rose's xml2rfc tool.
	6. References		6. References
	skipping to change at page 96, line 49 ¶		skipping to change at page 102, line 24 ¶
	[RFC4750] Joyal, D., Ed., Galecki, P., Ed., Giacalone, S., Ed.,		[RFC4750] Joyal, D., Ed., Galecki, P., Ed., Giacalone, S., Ed.,
	Coltun, R., and F. Baker, "OSPF Version 2 Management		Coltun, R., and F. Baker, "OSPF Version 2 Management
	Information Base", RFC 4750, DOI 10.17487/RFC4750,		Information Base", RFC 4750, DOI 10.17487/RFC4750,
	December 2006, <http://www.rfc-editor.org/info/rfc4750>.		December 2006, <http://www.rfc-editor.org/info/rfc4750>.
	[RFC5187] Pillay-Esnault, P. and A. Lindem, "OSPFv3 Graceful		[RFC5187] Pillay-Esnault, P. and A. Lindem, "OSPFv3 Graceful
	Restart", RFC 5187, DOI 10.17487/RFC5187, June 2008,		Restart", RFC 5187, DOI 10.17487/RFC5187, June 2008,
	<http://www.rfc-editor.org/info/rfc5187>.		<http://www.rfc-editor.org/info/rfc5187>.
			[RFC5246] Dierks, T. and E. Rescorla, "The Transport Layer Security
			(TLS) Protocol Version 1.2", RFC 5246,
			DOI 10.17487/RFC5246, August 2008,
			<http://www.rfc-editor.org/info/rfc5246>.
	[RFC5340] Coltun, R., Ferguson, D., Moy, J., and A. Lindem, "OSPF		[RFC5340] Coltun, R., Ferguson, D., Moy, J., and A. Lindem, "OSPF
	for IPv6", RFC 5340, DOI 10.17487/RFC5340, July 2008,		for IPv6", RFC 5340, DOI 10.17487/RFC5340, July 2008,
	<http://www.rfc-editor.org/info/rfc5340>.		<http://www.rfc-editor.org/info/rfc5340>.
	[RFC5643] Joyal, D., Ed. and V. Manral, Ed., "Management Information		[RFC5643] Joyal, D., Ed. and V. Manral, Ed., "Management Information
	Base for OSPFv3", RFC 5643, DOI 10.17487/RFC5643, August		Base for OSPFv3", RFC 5643, DOI 10.17487/RFC5643, August
	2009, <http://www.rfc-editor.org/info/rfc5643>.		2009, <http://www.rfc-editor.org/info/rfc5643>.
	[RFC5838] Lindem, A., Ed., Mirtorabi, S., Roy, A., Barnes, M., and		[RFC5838] Lindem, A., Ed., Mirtorabi, S., Roy, A., Barnes, M., and
	R. Aggarwal, "Support of Address Families in OSPFv3",		R. Aggarwal, "Support of Address Families in OSPFv3",
	skipping to change at page 97, line 24 ¶		skipping to change at page 103, line 5 ¶
	[RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for		[RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for
	the Network Configuration Protocol (NETCONF)", RFC 6020,		the Network Configuration Protocol (NETCONF)", RFC 6020,
	DOI 10.17487/RFC6020, October 2010,		DOI 10.17487/RFC6020, October 2010,
	<http://www.rfc-editor.org/info/rfc6020>.		<http://www.rfc-editor.org/info/rfc6020>.
	[RFC6241] Enns, R., Ed., Bjorklund, M., Ed., Schoenwaelder, J., Ed.,		[RFC6241] Enns, R., Ed., Bjorklund, M., Ed., Schoenwaelder, J., Ed.,
	and A. Bierman, Ed., "Network Configuration Protocol		and A. Bierman, Ed., "Network Configuration Protocol
	(NETCONF)", RFC 6241, DOI 10.17487/RFC6241, June 2011,		(NETCONF)", RFC 6241, DOI 10.17487/RFC6241, June 2011,
	<http://www.rfc-editor.org/info/rfc6241>.		<http://www.rfc-editor.org/info/rfc6241>.
			[RFC6242] Wasserman, M., "Using the NETCONF Protocol over Secure
			Shell (SSH)", RFC 6242, DOI 10.17487/RFC6242, June 2011,
			<http://www.rfc-editor.org/info/rfc6242>.
			[RFC6536] Bierman, A. and M. Bjorklund, "Network Configuration
			Protocol (NETCONF) Access Control Model", RFC 6536,
			DOI 10.17487/RFC6536, March 2012,
			<http://www.rfc-editor.org/info/rfc6536>.
	[RFC6565] Pillay-Esnault, P., Moyer, P., Doyle, J., Ertekin, E., and		[RFC6565] Pillay-Esnault, P., Moyer, P., Doyle, J., Ertekin, E., and
	M. Lundberg, "OSPFv3 as a Provider Edge to Customer Edge		M. Lundberg, "OSPFv3 as a Provider Edge to Customer Edge
	(PE-CE) Routing Protocol", RFC 6565, DOI 10.17487/RFC6565,		(PE-CE) Routing Protocol", RFC 6565, DOI 10.17487/RFC6565,
	June 2012, <http://www.rfc-editor.org/info/rfc6565>.		June 2012, <http://www.rfc-editor.org/info/rfc6565>.
	[RFC7223] Bjorklund, M., "A YANG Data Model for Interface		[RFC7223] Bjorklund, M., "A YANG Data Model for Interface
	Management", RFC 7223, DOI 10.17487/RFC7223, May 2014,		Management", RFC 7223, DOI 10.17487/RFC7223, May 2014,
	<http://www.rfc-editor.org/info/rfc7223>.		<http://www.rfc-editor.org/info/rfc7223>.
	[RFC8022] Lhotka, L. and A. Lindem, "A YANG Data Model for Routing		[RFC8022] Lhotka, L. and A. Lindem, "A YANG Data Model for Routing
	Management", RFC 8022, DOI 10.17487/RFC8022, November		Management", RFC 8022, DOI 10.17487/RFC8022, November
	2016, <http://www.rfc-editor.org/info/rfc8022>.		2016, <http://www.rfc-editor.org/info/rfc8022>.
			[RFC8040] Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF
			Protocol", RFC 8040, DOI 10.17487/RFC8040, January 2017,
			<http://www.rfc-editor.org/info/rfc8040>.
			[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,
			<http://www.rfc-editor.org/info/rfc8177>.
	6.2. Informative References		6.2. Informative References
	[I-D.ietf-rtgwg-yang-key-chain]		[I-D.ietf-netmod-revised-datastores]
	Lindem, A., Qu, Y., Yeung, D., Chen, I., Zhang, Z., and Y.		Bjorklund, M., Schoenwaelder, J., Shafer, P., Watsen, K.,
	Yang, "Routing Key Chain YANG Data Model", draft-ietf-		and R. Wilton, "Network Management Datastore
	rtgwg-yang-key-chain-15 (work in progress), February 2017.		Architecture", draft-ietf-netmod-revised-datastores-02
			(work in progress), May 2017.
	Appendix A. Contributors' Addreses		Appendix A. Contributors' Addreses
	Dean Bogdanovic		Dean Bogdanovic
	Volta Networks, Inc.		Volta Networks, Inc.
	EMail: dean@voltanet.io		EMail: dean@voltanet.io
	Kiran Koushik Agrahara Sreenivasa		Kiran Koushik Agrahara Sreenivasa
	Cisco Systems		Cisco Systems
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