YANG Data Model for Routing in Fat Trees (RIFT)
draft-ietf-rift-yang-17
| Document | Type | Active Internet-Draft (rift WG) | |
|---|---|---|---|
| Authors | Zheng Zhang , Yuehua Wei , Shaowen Ma , Xufeng Liu , Bruno Rijsman | ||
| Last updated | 2024-08-23 (Latest revision 2024-08-17) | ||
| RFC stream | Internet Engineering Task Force (IETF) | ||
| Intended RFC status | Proposed Standard | ||
| Formats | |||
| Yang Validation | 0 errors, 0 warnings | ||
| Reviews |
YANGDOCTORS Last Call review
(of
-11)
by Michal Vaško
On the right track
|
||
| Additional resources |
Yang catalog entry for ietf-rift@2020-07-11.yang
Yang impact analysis for draft-ietf-rift-yang Mailing list discussion |
||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Jordan Head | ||
| Shepherd write-up | Show Last changed 2022-06-07 | ||
| IESG | IESG state | RFC Ed Queue | |
| Action Holders |
(None)
|
||
| Consensus boilerplate | Yes | ||
| Telechat date | (None) | ||
| Responsible AD | Jim Guichard | ||
| Send notices to | jhead@juniper.net | ||
| IANA | IANA review state | IANA OK - Actions Needed | |
| IANA action state | RFC-Ed-Ack | ||
| IANA expert review state | Expert Reviews OK | ||
| RFC Editor | RFC Editor state | EDIT | |
| Details |
draft-ietf-rift-yang-17
RIFT WG Z. Zhang
Internet-Draft Y. Wei
Intended status: Standards Track ZTE Corporation
Expires: 18 February 2025 S. Ma
Google
X. Liu
Alef Edge
B. Rijsman
Individual
17 August 2024
YANG Data Model for Routing in Fat Trees (RIFT)
draft-ietf-rift-yang-17
Abstract
This document defines a YANG data model for the configuration and
management of Routing in Fat Trees (RIFT) Protocol. The model is
based on YANG 1.1 as defined in RFC7950 and conforms to the Network
Management Datastore Architecture (NMDA) as described in RFC8342.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on 18 February 2025.
Copyright Notice
Copyright (c) 2024 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents (https://trustee.ietf.org/
license-info) in effect on the date of publication of this document.
Please review these documents carefully, as they describe your rights
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and restrictions with respect to this document. Code Components
extracted from this document must include Revised BSD License text as
described in Section 4.e of the Trust Legal Provisions and are
provided without warranty as described in the Revised BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 2
1.2. Conventions Used in This Document . . . . . . . . . . . . 3
1.3. Tree Diagrams . . . . . . . . . . . . . . . . . . . . . . 4
1.4. Prefixes in Data Node Names . . . . . . . . . . . . . . . 4
2. Design of the Data Model . . . . . . . . . . . . . . . . . . 4
2.1. Scope of Model . . . . . . . . . . . . . . . . . . . . . 4
2.2. Specification . . . . . . . . . . . . . . . . . . . . . . 5
2.3. Overview . . . . . . . . . . . . . . . . . . . . . . . . 5
2.4. RIFT configuration . . . . . . . . . . . . . . . . . . . 14
2.5. RIFT States . . . . . . . . . . . . . . . . . . . . . . . 14
2.6. Notifications . . . . . . . . . . . . . . . . . . . . . . 14
3. RIFT YANG model . . . . . . . . . . . . . . . . . . . . . . . 14
4. Security Considerations . . . . . . . . . . . . . . . . . . . 55
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 57
6. Acknowledgement . . . . . . . . . . . . . . . . . . . . . . . 58
7. References . . . . . . . . . . . . . . . . . . . . . . . . . 58
7.1. Normative References . . . . . . . . . . . . . . . . . . 58
7.2. Informative References . . . . . . . . . . . . . . . . . 60
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 60
1. Introduction
RFC Ed.: Please replace all occurrences of 'I-D.ietf-rift-rift' with
the actual RFC number of draft-ietf-rift-rift (and remove this note).
[I-D.ietf-rift-rift] introduces the protocol definition of RIFT.
This document defines one NMDA compatible [RFC8342] YANG 1.1
[RFC7950] model for the management of RIFT protocol. This model
imports and augments ietf-routing YANG model defined in [RFC8349].
1.1. Terminology
The following terminologies and abbreviations are used in this
document and the defined model:
The content is copied from [I-D.ietf-rift-rift] for reading
convenience.
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Clos/Fat Tree: It refers to a folded spine-and-leaf topology with
possibly multiple Points of Delivery (PoDs) and one or multiple Top
of Fabric (ToF) planes.
RIFT: Routing in Fat Trees [I-D.ietf-rift-rift].
LIE: "Link Information Element" are exchanged on all the system's
links running RIFT to form ThreeWay adjacencies and carry information
used to perform Zero Touch Provisioning (ZTP) of levels.
PoD: "Point of Delivery" means a self-contained vertical slice or
subset of a Clos or Fat Tree network containing normally only level 0
and level 1 nodes. A node in a PoD communicates with nodes in other
PoDs via the ToF nodes. PoDs are numbered to distinguish them and
PoD value 0 is used to denote "undefined" or "any" PoD.
ThreeWay Adjacency: A unique adjacency between two nodes over a
point-to-point interface and exchange local configuration and
necessary RIFT ZTP information. An adjacency is only advertised in
Node TIEs and used for computations after it achieved ThreeWay state,
i.e. both routers reflected each other in LIEs including relevant
security information. Nevertheless, LIEs before ThreeWay state is
reached may carry RIFT ZTP related information already.
TIE: "Topology Information Element" are exchanged between RIFT nodes
to describe parts of a network such as links and address prefixes. A
TIE has always a direction and a type. North TIEs (sometimes
abbreviated as N-TIEs) are used when dealing with TIEs in the
northbound representation and South-TIEs (sometimes abbreviated as
S-TIEs) for the southbound equivalent. TIEs have different types
such as node and prefix TIEs.
ToF: "Top of Fabric" is the set of nodes that provide inter-PoD
communication and have no northbound adjacencies, i.e. are at the
"very top" of the fabric. ToF nodes do not belong to any PoD and are
assigned default PoD value to indicate the equivalent of "any" PoD.
1.2. Conventions Used in This Document
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in BCP
14 [RFC2119] [RFC8174] when, and only when, they appear in all
capitals, as shown here.
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1.3. Tree Diagrams
Tree diagrams used in this document follow the notation defined in
[RFC8340].
1.4. Prefixes in Data Node Names
In this document, names of data nodes, actions, and other data model
objects are often used without a prefix, as long as it is clear from
the context in which YANG module each name is defined. Otherwise,
names are prefixed using the standard prefix associated with the
corresponding YANG module, as shown in Table 1.
+===============+====================+===========+
| Prefix | YANG module | Reference |
+===============+====================+===========+
| yang | ietf-yang-types | [RFC6991] |
+---------------+--------------------+-----------+
| inet | ietf-inet-types | [RFC6991] |
+---------------+--------------------+-----------+
| rt | ietf-routing | [RFC8349] |
+---------------+--------------------+-----------+
| if | ietf-interfaces | [RFC8343] |
+---------------+--------------------+-----------+
| rt-types | ietf-routing-types | [RFC8294] |
+---------------+--------------------+-----------+
| iana-rt-types | iana-routing-types | [RFC8294] |
+---------------+--------------------+-----------+
| key-chain | ietf-key-chain | [RFC8177] |
+---------------+--------------------+-----------+
Table 1
2. Design of the Data Model
2.1. Scope of Model
This model can be used to configure and manage the RIFT protocol.
The operational state data and statistics can be retrieved by this
model. The subscription and push mechanism defined in [RFC8639] and
[RFC8641] can be implemented by the user to subscribe to
notifications on the data nodes in this model.
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The model contains all the basic configuration parameters to operate
the protocol. Depending on the implementation choices, some systems
may not allow some of the advanced parameters to be configurable.
The occasionally implemented parameters are modeled as optional
features in this model. This model can be extended, and it has been
structured in a way that such extensions can be conveniently made.
The RIFT YANG module augments the /routing/control-plane-protocols/
control-plane-protocol path defined in the ietf-routing module. This
model augments the routing module to add RIFT as a control plane
protocol. It then offers the ability to create a list of instances,
which it does by declaring 'list rift'. Multiple instances of the
protocol are supported by the module by giving each instance a unique
name.
2.2. Specification
This model imports and augments ietf-routing YANG model defined in
[RFC8349]. The container "rift" is the top level container in this
data model. The container is expected to enable RIFT protocol
functionality.
The YANG data model defined in this document conforms to the Network
Management Datastore Architecture (NMDA) [RFC8342]. The operational
state data is combined with the associated configuration data in the
same hierarchy [RFC8407].
2.3. Overview
The RIFT YANG module defined in this document has all the common
building blocks for the RIFT protocol.
The RIFT YANG module augments the /routing/control-plane-protocols/
control-plane-protocol path defined in the ietf-routing module. This
model augments the routing module to add RIFT as a control plane
protocol. It then offers the ability to create a list of instances,
which it does by declaring 'list rift'. Multiple instances of the
protocol are supported by the module by giving each instance a unique
name.
At a high level, RIFT YANG model is organized into five elements:
* base protocol configuration -- configuration affecting RIFT
protocol-related operations.
* interface configuration -- configuration affecting the interface
operations.
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* neigbor status -- information of neighbors.
* database -- information of TIEs.
* statistics-- statistics of SPF, interface and neighbor.
module: ietf-rift
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol:
+--rw rift* [name]
+--rw name string
+--rw global
| +--ro node-level? level
| +--rw system-id system-id
| +--rw fabric-id? uint16
| +--rw pod? uint32
| +--rw fabric-prefix? inet:ip-prefix
| +--rw fabric-prefix-advertise? boolean
| +--rw configured-level? level
| +--rw overload
| | +--rw overload? boolean
| | +--rw (timeout-type)?
| | +--:(on-startup)
| | | +--rw on-startup-timeout?
| | | rt-types:timer-value-seconds16
| | +--:(immediate)
| | +--rw immediate-timeout?
| | rt-types:timer-value-seconds16
| +--ro proto-major-ver uint8
| +--ro proto-minor-ver uint16
| +--rw node-capabilities
| | +--rw hierarchy-indications? enumeration
| | +--rw flood-reduction? boolean
| +--rw maximum-nonce-delta? uint8
| | {nonce-delta-adjust}?
| +--rw nonce-increasing-interval? uint16
| +--rw adjusted-lifetime?
| | rt-types:timer-value-seconds16
| +--rw rx-lie-multicast-addr
| | +--rw ipv4? inet:ipv4-address
| | +--rw ipv6? inet:ipv6-address
| +--rw tx-lie-multicast-addr
| | +--rw ipv4? inet:ipv4-address
| | +--rw ipv6? inet:ipv6-address
| +--rw lie-tx-port? inet:port-number
| +--rw global-link-capabilities
| | +--rw bfd-capable? boolean
| | +--rw v4-forwarding-capable? boolean
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| | +--rw mtu-size? uint32
| +--rw tide-generation-interval?
| | rt-types:timer-value-seconds16
| +--rw tie-security* [security-type] {tie-security}?
| | +--rw security-type enumeration
| | +--rw shared? boolean
| | +--rw (auth-key-chain)?
| | +--:(auth-key-chain)
| | | +--rw key-chain? key-chain:key-chain-ref
| | +--:(auth-key-explicit)
| | +--rw key? string
| | +--rw crypto-algorithm? identityref
| +--rw inner-security-key-id? uint8
| +--rw algorithm-type? enumeration
| +--ro hal
| | +--ro hal-value? level
| | +--ro system-ids* system-id
| +--ro miscabled-links* uint32
| +--rw hop-limit? uint8
| +--rw maximum-clock-delta? ieee802-1as-timestamp
+--rw interfaces* [name]
| +--ro link-id? uint32
| +--rw name if:interface-ref
| +--rw cost? uint32
| +--rw rx-flood-port? inet:port-number
| +--rw holdtime?
| | rt-types:timer-value-seconds16
| +--rw address-families*
| | iana-rt-types:address-family
| +--rw advertised-source-addr
| | +--rw ipv4? inet:ipv4-address-no-zone
| | +--rw ipv6? inet:ipv6-address-no-zone
| +--ro link-direction-type? enumeration
| +--rw broadcast-capable? boolean
| +--rw allow-horizontal-link? boolean
| +--rw security {link-security}?
| | +--rw security-type? enumeration
| | +--rw shared? boolean
| | +--rw (auth-key-chain)?
| | +--:(auth-key-chain)
| | | +--rw key-chain? key-chain:key-chain-ref
| | +--:(auth-key-explicit)
| | +--rw key? string
| | +--rw crypto-algorithm? identityref
| +--rw security-checking? enumeration
| +--ro was-the-last-lie-accepted? boolean
| +--ro last-lie-reject-reason? string
| +--ro advertised-in-lies
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| | +--ro label? uint32
| | | {label-switching}?
| | +--ro you-are-flood-repeater? boolean
| | +--ro not-a-ztp-offer? boolean
| | +--ro you-are-sending-too-quickly? boolean
| +--rw link-capabilities
| | +--rw bfd-capable? boolean
| | +--rw v4-forwarding-capable? boolean
| | +--rw mtu-size? uint32
| +--ro state enumeration
| +--ro neighbors* [system-id]
| | +--ro node-level? level
| | +--ro system-id system-id
| | +--ro fabric-id? uint16
| | +--ro pod? uint32
| | +--ro proto-major-ver? uint8
| | +--ro proto-minor-ver? uint16
| | +--ro sent-offer
| | | +--ro level? level
| | | +--ro not-a-ztp-offer? boolean
| | +--ro received-offer
| | | +--ro level? level
| | | +--ro not-a-ztp-offer? boolean
| | | +--ro best? boolean
| | | +--ro removed-from-consideration? boolean
| | | +--ro removal-reason? string
| | +--ro received-source-addr
| | | +--ro ipv4? inet:ipv4-address-no-zone
| | | +--ro ipv6? inet:ipv6-address-no-zone
| | +--ro link-id-pair* [remote-id]
| | | +--ro local-id? uint32
| | | +--ro remote-id uint32
| | | +--ro if-index? uint32
| | | +--ro if-name? if:interface-ref
| | | +--ro address-families*
| | | iana-rt-types:address-family
| | +--ro cost? uint32
| | +--ro bandwidth? uint32
| | +--ro received-link-capabilities
| | | +--ro bfd-capable? boolean
| | | +--ro v4-forwarding-capable? boolean
| | | +--ro mtu-size? uint32
| | +--ro received-in-lies
| | | +--ro label? uint32
| | | | {label-switching}?
| | | +--ro you-are-flood-repeater? boolean
| | | +--ro not-a-ztp-offer? boolean
| | | +--ro you-are-sending-too-quickly? boolean
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| | +--ro nbr-flood-port? inet:port-number
| | +--ro tx-flood-port? inet:port-number
| | +--ro bfd-state? enumeration
| | +--ro outer-security-key-id? uint8
| | +--ro local-nonce? uint16
| | +--ro remote-nonce? uint16
| | +---x clear-neighbor
| +---x clear-all-neighbors
+--ro statistics
| +--ro global
| | +--ro total-num-routes-north?
| | | yang:zero-based-counter32
| | +--ro total-num-routes-sourth?
| | yang:zero-based-counter32
| +--ro spf-statistics* [spf-direction-type]
| | +--ro spf-direction-type enumeration
| | +--ro start-time? yang:date-and-time
| | +--ro end-time? yang:date-and-time
| | +--ro triggering-tie
| | | +--ro tie-direction-type? enumeration
| | | +--ro originator? system-id
| | | +--ro tie-type? enumeration
| | | +--ro tie-number? uint32
| | | +--ro seq? uint64
| | | +--ro size? uint32
| | | +--ro origination-time? ieee802-1as-timestamp
| | | +--ro origination-lifetime? uint32
| | | +--ro remaining-lifetime? uint32
| | +---x clear-spf-statistics
| +--ro interfaces* [name]
| | +--ro name if:interface-ref
| | +--ro intf-states-statistics
| | | +--ro intf-states-startup-time? uint64
| | | +--ro num-of-nbrs-3way?
| | | | yang:zero-based-counter32
| | | +--ro num-of-nbrs-down?
| | | | yang:zero-based-counter32
| | | +--ro nbrs-down-reasons* [system-id]
| | | | +--ro system-id system-id
| | | | +--ro last-down-reason? string
| | | +--ro num-local-level-change?
| | | | yang:zero-based-counter32
| | | +--ro number-of-flaps?
| | | | yang:zero-based-counter32
| | | +--ro last-state-change? yang:date-and-time
| | | +--ro last-up? yang:date-and-time
| | | +--ro last-down? yang:date-and-time
| | | +--ro intf-lie-states
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| | | +--ro last-lie-sent-time? uint64
| | | +--ro last-lie-received-time? uint64
| | | +--ro num-lie-received?
| | | | yang:zero-based-counter32
| | | +--ro num-lie-transmitted?
| | | | yang:zero-based-counter32
| | | +--ro num-lie-drop-invalid-envelope?
| | | | yang:zero-based-counter32
| | | +--ro num-lie-drop-invalid-nonce?
| | | | yang:zero-based-counter32
| | | +--ro num-lie-corrupted?
| | | yang:zero-based-counter32
| | +--ro flood-repeater-statistics
| | | +--ro flood-repeater? system-id
| | | +--ro num-flood-repeater-changes?
| | | | yang:zero-based-counter32
| | | +--ro last-flood-repeater-change-reason? string
| | +---x clear-intf-statistics
| +--ro neighbors* [system-id]
| +--ro system-id system-id
| +--ro tie-state-statistics
| | +--ro transmit-queue?
| | | yang:zero-based-counter32
| | +--ro last-queued-tie
| | | +--ro tie-direction-type? enumeration
| | | +--ro originator? system-id
| | | +--ro tie-type? enumeration
| | | +--ro tie-number? uint32
| | | +--ro seq? uint64
| | | +--ro size? uint32
| | | +--ro origination-time?
| | | | ieee802-1as-timestamp
| | | +--ro origination-lifetime? uint32
| | | +--ro remaining-lifetime? uint32
| | | +--ro reason-queued? string
| | +--ro num-received-ties?
| | | yang:zero-based-counter32
| | +--ro num-transmitted-ties?
| | | yang:zero-based-counter32
| | +--ro num-retransmitted-ties?
| | | yang:zero-based-counter32
| | +--ro num-flood-reduced-ties?
| | | yang:zero-based-counter32
| | +--ro num-received-tides?
| | | yang:zero-based-counter32
| | +--ro num-transmitted-tides?
| | | yang:zero-based-counter32
| | +--ro num-received-tires?
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| | | yang:zero-based-counter32
| | +--ro num-transmitted-tires?
| | | yang:zero-based-counter32
| | +--ro num-request-locally?
| | | yang:zero-based-counter32
| | +--ro num-request-remotely?
| | | yang:zero-based-counter32
| | +--ro num-same-older-ties-received?
| | | yang:zero-based-counter32
| | +--ro num-seq-mismatch-pkts-received?
| | | yang:zero-based-counter32
| | +--ro last-sent-tie
| | | +--ro tie-direction-type? enumeration
| | | +--ro originator? system-id
| | | +--ro tie-type? enumeration
| | | +--ro tie-number? uint32
| | | +--ro seq? uint64
| | | +--ro size? uint32
| | | +--ro origination-time?
| | | | ieee802-1as-timestamp
| | | +--ro origination-lifetime? uint32
| | | +--ro remaining-lifetime? uint32
| | | +--ro last-tie-sent-time? yang:date-and-time
| | +--ro last-recv-tie
| | | +--ro tie-direction-type? enumeration
| | | +--ro originator? system-id
| | | +--ro tie-type? enumeration
| | | +--ro tie-number? uint32
| | | +--ro seq? uint64
| | | +--ro size? uint32
| | | +--ro origination-time?
| | | | ieee802-1as-timestamp
| | | +--ro origination-lifetime? uint32
| | | +--ro remaining-lifetime? uint32
| | | +--ro last-tie-recv-time? yang:date-and-time
| | +--ro largest-tie
| | | +--ro largest-tie-sent
| | | | +--ro tie-direction-type? enumeration
| | | | +--ro originator? system-id
| | | | +--ro tie-type? enumeration
| | | | +--ro tie-number? uint32
| | | | +--ro seq? uint64
| | | | +--ro size? uint32
| | | | +--ro origination-time?
| | | | | ieee802-1as-timestamp
| | | | +--ro origination-lifetime? uint32
| | | | +--ro remaining-lifetime? uint32
| | | +--ro largest-tide-sent
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| | | | +--ro tie-direction-type? enumeration
| | | | +--ro originator? system-id
| | | | +--ro tie-type? enumeration
| | | | +--ro tie-number? uint32
| | | | +--ro seq? uint64
| | | | +--ro size? uint32
| | | | +--ro origination-time?
| | | | | ieee802-1as-timestamp
| | | | +--ro origination-lifetime? uint32
| | | | +--ro remaining-lifetime? uint32
| | | +--ro largest-tire-sent
| | | +--ro tie-direction-type? enumeration
| | | +--ro originator? system-id
| | | +--ro tie-type? enumeration
| | | +--ro tie-number? uint32
| | | +--ro seq? uint64
| | | +--ro size? uint32
| | | +--ro origination-time?
| | | | ieee802-1as-timestamp
| | | +--ro origination-lifetime? uint32
| | | +--ro remaining-lifetime? uint32
| | +--ro num-tie-dropped
| | +--ro num-tie-outer-envelope?
| | | yang:zero-based-counter32
| | +--ro num-tie-inner-envelope?
| | | yang:zero-based-counter32
| | +--ro num-tie-nonce?
| | yang:zero-based-counter32
| +---x clear-nbr-statistics
+--ro database
+--ro ties*
[tie-direction-type originator tie-type tie-number]
+--ro tie-direction-type enumeration
+--ro originator system-id
+--ro tie-type enumeration
+--ro tie-number uint32
+--ro seq? uint64
+--ro size? uint32
+--ro origination-time? ieee802-1as-timestamp
+--ro origination-lifetime? uint32
+--ro remaining-lifetime? uint32
+--ro node
| +--ro level? level
| +--ro neighbors* [system-id]
| | +--ro node-level? level
| | +--ro system-id system-id
| | +--ro fabric-id? uint16
| | +--ro pod? uint32
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| | +--ro link-id-pair* [remote-id]
| | | +--ro local-id? uint32
| | | +--ro remote-id uint32
| | | +--ro if-index? uint32
| | | +--ro if-name? if:interface-ref
| | | +--ro address-families*
| | | iana-rt-types:address-family
| | +--ro cost? uint32
| | +--ro bandwidth? uint32
| | +--ro received-link-capabilities
| | +--ro bfd-capable? boolean
| | +--ro v4-forwarding-capable? boolean
| | +--ro mtu-size? uint32
| +--ro proto-minor-ver? uint16
| +--ro flood-reduction? boolean
| +--ro hierarchy-indications
| | +--ro hierarchy-indications? enumeration
| +--ro overload-flag? boolean
| +--ro name? string
| +--ro pod? uint32
| +--ro startup-time? uint64
| +--ro miscabled-links* uint32
| +--ro same-plane-tofs* system-id
| +--ro fabric-id? uint32
+--ro prefixes
| +--ro prefixes* [prefix]
| +--ro prefix inet:ip-prefix
| +--ro tie-type? enumeration
| +--ro metric? uint32
| +--ro tags* uint64
| +--ro monotonic-clock
| | +--ro prefix-sequence-type
| | +--ro timestamp
| | | ieee802-1as-timestamp
| | +--ro transaction-id? uint8
| +--ro loopback? boolean
| +--ro directly-attached? boolean
| +--ro from-link? uint32
| +--ro label? uint32
+--ro key-value
+--ro key? binary
+--ro value? binary
notifications:
+---n error-set
+--ro tie-level-error
| +--ro rift* [name]
| +--ro name string
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| +--ro ties* [originator]
| +--ro tie-direction-type? enumeration
| +--ro originator system-id
| +--ro tie-type? enumeration
| +--ro tie-number? uint32
| +--ro seq? uint64
| +--ro size? uint32
| +--ro origination-time? ieee802-1as-timestamp
| +--ro origination-lifetime? uint32
| +--ro remaining-lifetime? uint32
+--ro neighbor-error
+--ro rift* [name]
+--ro name string
+--ro interfaces* [name]
+--ro link-id? uint32
+--ro name if:interface-ref
+--ro neighbors* [system-id]
+--ro system-id system-id
+--ro node-level? level
2.4. RIFT configuration
The RIFT configuration includes node global configuration and
interface configuration. Some features can be used to enhance
protocol, such as BFD [RFC5881], flooding-reducing section 6.3.9
[I-D.ietf-rift-rift].
2.5. RIFT States
The state data nodes include node, interface, neighbor and database
information.
YANG actions are defined to clear the connection of one specific
neighbor on an interface, clear the connections of all neighbors on
an interface, or clear some or all statistics.
2.6. Notifications
Unexpected TIE and neighbor's layer error should be notified.
3. RIFT YANG model
This module references [I-D.ietf-rift-rift], [RFC5881], [RFC6991],
[RFC8177], [RFC8294], [RFC8343], [RFC8349], [RFC8505], [IEEE8021AS].
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<CODE BEGINS> file "ietf-rift@2024-08-16.yang"
module ietf-rift {
yang-version 1.1;
namespace "urn:ietf:params:xml:ns:yang:ietf-rift";
prefix rift;
import ietf-inet-types {
prefix "inet";
reference
"RFC 6991: Common YANG Data Types";
}
import ietf-yang-types {
prefix "yang";
reference
"RFC 6991: Common YANG Data Types";
}
import ietf-routing {
prefix "rt";
reference
"RFC 8349: A YANG Data Model for Routing Management
(NMDA Version)";
}
import ietf-interfaces {
prefix "if";
reference
"RFC 8343: A YANG Data Model for Interface Management";
}
import ietf-routing-types {
prefix "rt-types";
reference
"RFC 8294: Common YANG Data Types for the Routing Area";
}
import iana-routing-types {
prefix "iana-rt-types";
reference
"RFC 8294: Common YANG Data Types for the Routing Area";
}
import ietf-key-chain {
prefix "key-chain";
reference
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"RFC 8177: YANG Data Model for Key Chains";
}
organization
"IETF RIFT (Routing In Fat Trees) Working Group";
contact
"WG Web: <https://datatracker.ietf.org/wg/rift/>
WG List: <mailto:rift@ietf.org>
Editor: Zheng Zhang
<mailto:zhang.zheng@zte.com.cn>
Editor: Yuehua Wei
<mailto:wei.yuehua@zte.com.cn>
Editor: Shaowen Ma
<mailto:mashaowen@gmail.com>
Editor: Xufeng Liu
<mailto:xufeng.liu.ietf@gmail.com>
Editor: Bruno Rijsman
<mailto:brunorijsman@gmail.com>";
// RFC Ed.: replace XXXX with actual RFC number and remove
// this note
description
"This YANG module defines the generic configuration and
operational state for the RIFT protocol common to all
vendor implementations. It is intended that the module
will be extended by vendors to define vendor-specific
RIFT configuration parameters and policies --
for example, route maps or route policies.
Copyright (c) 2024 IETF Trust and the persons identified as
authors of the code. All rights reserved.
Redistribution and use in source and binary forms, with or
without modification, is permitted pursuant to, and subject to
the license terms contained in, the Revised BSD License set
forth in Section 4.c of the IETF Trust's Legal Provisions
Relating to IETF Documents
(https://trustee.ietf.org/license-info).
This version of this YANG module is part of RFC XXXX
(https://www.rfc-editor.org/info/rfcXXXX); see the RFC itself
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for full legal notices.
The key words 'MUST', 'MUST NOT', 'REQUIRED', 'SHALL', 'SHALL
NOT', 'SHOULD', 'SHOULD NOT', 'RECOMMENDED', 'NOT RECOMMENDED',
'MAY', and 'OPTIONAL' in this document are to be interpreted as
described in BCP 14 (RFC 2119) (RFC 8174) when, and only when,
they appear in all capitals, as shown here.";
revision 2024-08-16 {
description
"Initial revision.";
reference
"RFCXXXX: YANG Data Model for Routing in Fat Trees
(RIFT).";
}
/*
* Features
*/
feature nonce-delta-adjust {
description
"Support weak nonce delta adjusting which is used in
security.";
reference
"I-D.ietf-rift-rift: RIFT: Routing in Fat Trees.
Section 6.9.";
}
feature label-switching {
description
"Support label switching for instance distinguishing.";
reference
"I-D.ietf-rift-rift: RIFT: Routing in Fat Trees.
Section 6.8.8";
}
feature tie-security {
description
"Support security function for the TIE exchange.";
reference
"I-D.ietf-rift-rift: RIFT: Routing in Fat Trees.
Section 6.9.3.";
}
feature link-security {
description
"Support security function of link.";
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reference
"I-D.ietf-rift-rift: RIFT: Routing in Fat Trees.
Section 6.9.";
}
typedef system-id {
type string {
pattern
'[0-9A-Fa-f]{4}\.[0-9A-Fa-f]{4}\.[0-9A-Fa-f]{4}\.[0-9A-Fa-f]{4}';
}
description
"This type defines RIFT system id using pattern,
the system id looks like: 0021.2FFF.FEB5.6E10";
}
typedef level {
type uint8 {
range "0 .. 24";
}
default "0";
description
"The value of node level.
Clos and Fat Tree networks are topologically partially
ordered graphs and 'level' denotes the set of nodes at
the same height in such a network.
Nodes at the top level (i.e., ToF) are at the level with
the highest value and count down to the nodes
at the bottom level (i.e., leaf) with the lowest value.
In RIFT, Level 0 always indicates that a node is a leaf,
but does not have to be level 0.
Level values can be configured manually or automatically
derived.";
reference
"I-D.ietf-rift-rift: RIFT: Routing in Fat Trees.
Section 6.7.";
}
typedef ieee802-1as-timestamp {
type uint64;
units "seconds";
description
"Timestamp per IEEE802.1AS. It is advertised with prefix
to achieve mobility.";
reference
"I-D.ietf-rift-rift: RIFT: Routing in Fat Trees. Section 6.8.4.
IEEE8021AS: Timing and Synchronization for Time-Sensitive
Applications in Bridged Local Area Networks";
}
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/*
* Identity
*/
identity rift {
base rt:routing-protocol;
description
"Identity for the RIFT routing protocol.";
reference
"I-D.ietf-rift-rift: RIFT: Routing in Fat Trees";
}
/*
* Groupings
*/
grouping address-families {
leaf-list address-families {
type iana-rt-types:address-family;
description
"Indication which address families are up on the
interface.";
}
description
"Containing address families on the interface.";
}
grouping hierarchy-indications {
leaf hierarchy-indications {
type enumeration {
enum "leaf-only" {
description
"The node will never leave the
'bottom of the hierarchy'.
When this value is set, the 'configured-level'
is the minimum level value.";
}
enum "leaf-only-and-leaf-2-leaf-procedures" {
description
"This means leaf to leaf.
When this value is set, the 'configured-level'
is the minimum level value.";
}
enum "top-of-fabric" {
description
"The node is 'top of fabric'.
When this value is set, the 'configured-level'
is the maximum level value.";
}
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}
description
"The hierarchy indications of this node.";
}
description
"Flags indicating node configuration in case of ZTP";
}
grouping node-capability {
leaf proto-minor-ver {
type uint16;
description
"Represents the minor protocol encoding schema
version of this node.";
}
leaf flood-reduction {
type boolean;
description
"If the value is set to 'true', it means that
this node enables the flood reduction function.";
}
container hierarchy-indications {
config false;
description
"The hierarchy-indications of the node.";
uses hierarchy-indications;
}
description
"The supported capabilities of this node.";
}
grouping tie-type {
leaf tie-type {
type enumeration {
enum "illegal" {
description
"The illegal TIE.";
}
enum "min-tie-type" {
description
"The minimum TIE.";
}
enum "node" {
description
"The node TIE.";
}
enum "prefix" {
description
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"The prefix TIE.";
}
enum "positive-disaggregation-prefix" {
description
"The positive disaggregation prefix TIE.";
}
enum "negative-disaggregation-prefix" {
description
"The negative disaggregation prefix TIE.";
}
enum "pgp-prefix" {
description
"The policy guide prefix TIE.";
}
enum "key-value" {
description
"The key value TIE.";
}
enum "external-prefix" {
description
"The external prefix TIE.";
}
enum "positive-external-disaggregation-prefix" {
description
"The positive external disaggregation prefix TIE.";
}
enum "max-tie-type" {
description
"The maximum TIE.";
}
}
description
"The types of TIE.";
}
description
"The types of TIE";
}
grouping prefix-attribute {
leaf metric {
type uint32;
description
"The metric of this prefix.";
}
leaf-list tags {
type uint64;
description
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"The tags of this prefix.";
}
container monotonic-clock {
container prefix-sequence-type {
leaf timestamp {
type ieee802-1as-timestamp;
mandatory true;
description
"The timestamp per 802.1AS can be advertised
with the desired prefix North TIEs.";
}
leaf transaction-id {
type uint8;
description
"As per RFC 8505, a sequence number called a
Transaction ID (TID) with a prefix can be
advertised.";
reference
"RFC 8505: Registration Extensions for IPv6 over
Low-Power Wireless Personal Area Network (6LoWPAN)
Neighbor Discovery";
}
description
"The prefix sequence attribute which can be advertised
for mobility.";
reference
"I-D.ietf-rift-rift: RIFT: Routing in Fat Trees.
Section 6.8.4.";
}
description
"The monotonic clock for mobile addresses.";
}
leaf loopback {
type boolean;
description
"If the value is set to 'true', it
indicates if the interface is a node loopback.
The node's loopback address can be injected into
North and South Prefix TIEs for node reachability.";
reference
"I-D.ietf-rift-rift: RIFT: Routing in Fat Trees.
Section 6.4.";
}
leaf directly-attached {
type boolean;
description
"If the value is set to 'true', it indicates that the
prefix is directly attached, i.e. should be routed to
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even if the node is in overload.";
}
leaf from-link {
type uint32;
description
"In case of locally originated prefixes,
i.e. interface addresses this can describe which
link the address belongs to.";
}
leaf label {
type uint32;
description
"Per prefix significant label.";
reference
"I-D.ietf-rift-rift: RIFT: Routing in Fat Trees";
}
description
"The attributes of the prefix.";
}
grouping security {
leaf security-type {
type enumeration {
enum public {
description
"When using PKI (Public Key Infrastructure),
the public and shared key can be used to verify
the original packet exchanged with the neighbor.";
}
enum private {
description
"When using PKI (Public Key Infrastructure),
the private key can be used by the Security
fingerprint originating node to create the signature.";
}
}
description
"The security type.";
reference
"I-D.ietf-rift-rift: RIFT: Routing in Fat Trees.
Section 6.9.";
}
leaf shared {
type boolean;
description
"When using PKI (Public Key Infrastructure),
if the key is shared.";
reference
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"I-D.ietf-rift-rift: RIFT: Routing in Fat Trees.
Section 6.9.";
}
choice auth-key-chain {
description
"Key chain or explicit key parameter specification";
case auth-key-chain {
leaf key-chain {
type key-chain:key-chain-ref;
description
"key-chain name.";
reference
"RFC 8177: YANG Data Model for Key Chains";
}
}
case auth-key-explicit {
leaf key {
type string;
description
"Authentication key. The length of the key may be
dependent on the cryptographic algorithm.";
}
leaf crypto-algorithm {
type identityref {
base key-chain:crypto-algorithm;
}
description
"Cryptographic algorithm associated with key.";
reference
"RFC 8177: YANG Data Model for Key Chains";
}
}
}
description
"The security parameters.";
}
grouping base-node-info {
leaf node-level {
type level;
config false;
description
"The level of this node.";
}
leaf system-id {
type system-id;
mandatory true;
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description
"Each node is identified via a system-id which is 64
bits wide.";
}
leaf fabric-id {
type uint16;
description
"The optional id of the fabric.";
}
leaf pod {
type uint32 {
range "1..max";
}
description
"The identifier of the Point of Delivery (PoD).
A PoD is the self-contained vertical slice of a
Clos or Fat Tree network containing normally only leaf
nodes (level 0) and their immediate northbound
neighbors. It communicates with nodes
in other PoDs via the spine. Making this leaf
unspecified indicates that the PoD is 'undefined'.";
}
description
"The base information of a node.";
} // base-node-info
grouping link-capabilities {
leaf bfd-capable {
type boolean;
default "true";
description
"If this value is set to 'true', it means that
BFD function is enabled on the neighbor.";
reference
"RFC 5881: Bidirectional Forwarding Detection (BFD)
for IPv4 and IPv6 (Single Hop)";
}
leaf v4-forwarding-capable {
type boolean;
default "true";
description
"If this value is set to 'true', it means that
the neighbor supports v4 forwarding.";
}
leaf mtu-size {
type uint32;
default "1400";
description
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"MTU of the link.";
}
description
"The features of neighbor.";
} // link-capabilities
grouping addresses {
leaf ipv4 {
type inet:ipv4-address-no-zone;
description
"IPv4 address to be used.";
}
leaf ipv6 {
type inet:ipv6-address-no-zone;
description
"IPv6 address to be used.";
}
description
"IPv4 and/or IPv6 address to be used.";
}
grouping lie-elements {
leaf label {
if-feature label-switching;
type uint32;
description
"A locally significant, downstream assigned by
the neighbor, interface specific label which may
be advertised in its LIEs.";
reference
"I-D.ietf-rift-rift: RIFT: Routing in Fat Trees.
Section 6.8.8.";
}
leaf you-are-flood-repeater {
type boolean;
description
"If the neighbor on this link is flooding repeater.
When this value is set to 'true', the value can be
carried in exchanged packet.";
reference
"I-D.ietf-rift-rift: RIFT: Routing in Fat Trees.
Section 6.3.9.";
}
leaf not-a-ztp-offer {
type boolean;
description
"When this value is set to 'true', the flag can be
carried in the LIE packet. When the value received
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in the LIE from neighbor, it indicates the level on
the LIE MUST NOT be used to derive a ZTP level by
the receiving node.";
reference
"I-D.ietf-rift-rift: RIFT: Routing in Fat Trees.
Section 6.7.";
}
leaf you-are-sending-too-quickly {
type boolean;
description
"Can be optionally set to indicate to neighbor that
packet losses are seen on reception based on packet
numbers or the rate is too high. The receiver SHOULD
temporarily slow down flooding rates. When this value
is set to 'true', the flag can be carried in packet.";
}
description
"The elements set in the LIEs.";
} // lie-elements
grouping link-id-pair {
leaf local-id {
type uint32;
description
"The local-id of link connect to this neighbor.";
}
leaf remote-id {
type uint32;
description
"The remote-id to reach this neighbor.";
}
leaf if-index {
type uint32;
description
"The local index of this interface.";
}
leaf if-name {
type if:interface-ref;
description
"The name of this interface.";
}
uses address-families;
description
"A pair of local and remote link-id to identify a link
between two nodes.";
} // link-id-pair
grouping neighbor-node {
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list link-id-pair {
key "remote-id";
uses link-id-pair;
description
"The Multiple parallel links to this neighbor.";
}
leaf cost {
type uint32;
description
"The cost value advertised by the neighbor.";
}
leaf bandwidth {
type uint32;
units "bits";
description
"Total bandwith to the neighbor, this will be
normally sum of the bandwidths of all the
parallel links.";
}
container received-link-capabilities {
uses link-capabilities;
description
"The link capabilities advertised by the neighbor.";
}
description
"The neighbor information indicated in node TIE.";
} // neighbor-node
grouping neighbor {
leaf proto-major-ver {
type uint8;
description
"Represents protocol encoding schema major version of
this neighbor.";
}
leaf proto-minor-ver {
type uint16;
description
"Represents protocol encoding schema minor version of
this neighbor.";
}
container sent-offer {
leaf level {
type level;
description
"The level value.";
}
leaf not-a-ztp-offer {
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type boolean;
description
"If the value is set to 'true', it indicates the
level on the LIE MUST NOT be used to derive a
ZTP level by the neighbor.";
}
description
"The level sent to the neighbor in case the neighbor
needs to be offered.";
}
container received-offer {
leaf level {
type level;
description
"The level value.";
}
leaf not-a-ztp-offer {
type boolean;
description
"If the value is set to 'true', it indicates the
level on the received LIE MUST NOT be used to
derive a ZTP level.";
}
leaf best {
type boolean;
description
"If the value is set to 'true', it means that
the level is the best level received from all
the neighbors.";
}
leaf removed-from-consideration {
type boolean;
description
"If the value is set to 'true', it means that
the level value is not considered to be used.";
}
leaf removal-reason {
when "../removed-from-consideration='true'" {
description
"The level value is not considered to be used.";
}
type string;
description
"The reason why this value is not considered to
be used.";
}
description
"The level offered to the interface from the neighbor.
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And if the level value is considered to be used.";
}
container received-source-addr {
uses addresses;
description
"The source address of LIE and TIE packets from
the neighbor.";
} // received-offer
uses neighbor-node;
container received-in-lies {
uses lie-elements;
description
"The attributes received from this neighbor.";
}
leaf nbr-flood-port {
type inet:port-number;
default "915";
description
"The UDP port which is used by the neighbor to flood
TIEs.";
}
leaf tx-flood-port {
type inet:port-number;
default "915";
description
"The UDP port which is used by the node to flood
TIEs to the neighbor.";
}
leaf bfd-state {
type enumeration {
enum up {
description
"The link is protected by established BFD session.";
}
enum down {
description
"The link is not protected by established BFD session.";
}
}
description
"The link is protected by established BFD session or not.";
}
leaf outer-security-key-id {
type uint8;
description
"The received security key id from the neighbor.";
reference
"I-D.ietf-rift-rift: RIFT: Routing in Fat Trees.
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Section 6.9.3.";
}
description
"The neighbor information.";
} // neighbor
grouping link-direction-type {
leaf link-direction-type {
type enumeration {
enum illegal {
description
"Illegal direction.";
}
enum south {
description
"A link to a node one level down.";
}
enum north {
description
"A link to a node one level up.";
}
enum east-west {
description
"A link to a node in the same level.";
}
enum max {
description
"The max value of direction.";
}
}
config false;
description
"The type of link.";
}
description
"The type of link.";
} // link-direction-type
grouping tie-direction-type {
leaf tie-direction-type {
type enumeration {
enum illegal {
description
"Illegal direction.";
}
enum south {
description
"The direction to a node one level down.";
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}
enum north {
description
"The direction to a node one level up.";
}
enum max {
description
"The max value of direction.";
}
}
config false;
description
"The direction type of TIE.";
}
description
"The direction type of TIE.";
} // tie-direction-type
grouping spf-direction-type {
leaf spf-direction-type {
type enumeration {
enum n-spf {
description
"A reachability calculation that is progressing
northbound, as example SPF that is using South
Node TIEs only. Normally it progresses a single
hop only and installs default routes.";
}
enum s-spf {
description
"A reachability calculation that is progressing
southbound, as example SPF that is using North
Node TIEs only.";
}
}
config false;
description
"The direction type of SPF calculation.";
}
description
"The direction type of SPF calculation.";
} // spf-direction-type
grouping tie-header {
uses tie-direction-type;
leaf originator {
type system-id;
description
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"The originator's system-id of this TIE.";
}
uses tie-type;
leaf tie-number {
type uint32;
description
"The number of this TIE";
}
leaf seq {
type uint64;
description
"The sequence number of a TIE.";
reference
"I-D.ietf-rift-rift: RIFT: Routing in Fat Trees.
Section 6.3.1.";
}
leaf size {
type uint32;
description
"The size of this TIE.";
}
leaf origination-time {
type ieee802-1as-timestamp;
description
"Absolute timestamp when the TIE was generated.
This can be used on fabrics with synchronized
clock to prevent lifetime modification attacks.";
}
leaf origination-lifetime {
type uint32;
units seconds;
description
"Original lifetime when the TIE was generated.
This can be used on fabrics with synchronized clock
to prevent lifetime modification attacks.";
}
leaf remaining-lifetime {
type uint32;
units seconds;
description
"The remaining lifetime of the TIE.";
}
description
"TIEs are exchanged between RIFT nodes to describe parts
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of a network such as links and address prefixes.
This is the TIE header information.";
} // tie-header
/*
* Data nodes
*/
augment "/rt:routing/rt:control-plane-protocols"
+ "/rt:control-plane-protocol" {
when "derived-from-or-self(rt:type, 'rift:rift')" {
description
"This augment is only valid when routing protocol
instance type is 'RIFT'.";
}
description
"RIFT ( Routing in Fat Trees ) YANG model.";
list rift {
key "name";
leaf name {
type string;
description
"The RIFT instance's name.";
}
container global {
description
"The global configuration and status of
this RIFT protocol instance.";
uses base-node-info;
leaf fabric-prefix {
type inet:ip-prefix;
description
"The configured fabric prefix.";
}
leaf fabric-prefix-advertise {
type boolean;
description
"Whether the fabric-prefix can be advertised or not.
If the value is set to 'true', it means that
the fabric-prefix can be advertised to neighbors.";
}
leaf configured-level {
type level;
description
"The configured level value of this node.";
}
container overload {
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description
"If the overload in TIEs can be set
and the timeout value with according type.";
leaf overload {
type boolean;
description
"If the value is set to 'true', it means that
the overload bit in TIEs can be set.";
}
choice timeout-type {
description
"The value of timeout timer for overloading.
This makes sense when overload is set to 'TRUE'.";
case on-startup {
leaf on-startup-timeout {
type rt-types:timer-value-seconds16;
description
"Node goes into overload until this timer
expires when starting up.";
}
}
case immediate {
leaf immediate-timeout {
type rt-types:timer-value-seconds16;
description
"Set overload and remove after the timeout
expired.";
}
}
}
}
leaf proto-major-ver {
type uint8;
config false;
mandatory true;
description
"Represents protocol encoding schema major version.";
}
leaf proto-minor-ver {
type uint16;
config false;
mandatory true;
description
"Represents protocol encoding schema minor version.";
}
container node-capabilities {
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uses hierarchy-indications;
leaf flood-reduction {
type boolean;
description
"If the node supports flood reduction function.
If this value is set to 'true', it means that
the flood reduction function is enabled.";
reference
"I-D.ietf-rift-rift: RIFT: Routing in Fat Trees.
Section 6.3.8.";
}
description
"The node's capabilities.";
}
leaf maximum-nonce-delta {
if-feature nonce-delta-adjust;
type uint8 {
range "1..5";
}
description
"The configurable valid nonce delta value used for
security. It is used as vulnerability window.
If the nonces in received packet exceeds the range
indicated by this value, the packet MUST be
discarded.";
reference
"I-D.ietf-rift-rift: RIFT: Routing in Fat Trees.
Section 6.9.4.";
}
leaf nonce-increasing-interval {
type uint16;
units seconds;
description
"The configurable nonce increasing interval.";
}
leaf adjusted-lifetime {
type rt-types:timer-value-seconds16;
units seconds;
description
"The adjusted lifetime may affect the TIE stability.
Be careful to change this parameter.
This SHOULD be prohibited less than 2*purge-lifetime.";
}
container rx-lie-multicast-addr {
leaf ipv4 {
type inet:ipv4-address;
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default "224.0.0.121";
description
"The configurable LIE receiving IPv4 multicast
address.
Different multicast addresses can be used for
receiving and sending.";
}
leaf ipv6 {
type inet:ipv6-address;
default "ff02::a1f7";
description
"The configurable LIE receiving IPv6 multicast
address.
Different multicast addresses can be used for
receiving and sending.";
}
description
"The configurable LIE receiving IPv4/IPv6 multicast
address.
Different multicast addresses can be used for
receiving and sending.";
}
container tx-lie-multicast-addr {
leaf ipv4 {
type inet:ipv4-address;
description
"The configurable LIE sending IPv4 multicast
address.
Different multicast addresses can be used for
receiving and sending.";
}
leaf ipv6 {
type inet:ipv6-address;
description
"The configurable LIE sending IPv6 multicast
address.
Different multicast addresses can be used for
receiving and sending.";
}
description
"The configurable LIE sending IPv4/IPv6 multicast
address.
Different multicast addresses can be used for
receiving and sending.";
}
leaf lie-tx-port {
type inet:port-number;
default "914";
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description
"The UDP port of LIE packet sending. The default port
number is 914. The value can be set to other value
associated with different RIFT instance.";
}
container global-link-capabilities {
uses link-capabilities;
description
"The node default link capabilities. It can be
overwritten by the configuration underneath interface
and neighbor.";
}
leaf tide-generation-interval {
type rt-types:timer-value-seconds16;
units seconds;
description
"The TIDE generation interval.";
}
list tie-security {
if-feature tie-security;
key "security-type";
uses security;
description
"The security function used for the TIE exchange.";
reference
"I-D.ietf-rift-rift: RIFT: Routing in Fat Trees.
Section 6.9.3.";
}
leaf inner-security-key-id {
type uint8;
description
"The inner security key id for received packet
checking.";
reference
"I-D.ietf-rift-rift: RIFT: Routing in Fat Trees.
Section 6.9.3.";
}
leaf algorithm-type {
type enumeration {
enum spf {
description
"The algorithm is SPF.";
}
enum all-path {
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description
"The algorithm is all-path.";
}
}
description
"The possible algorithm types.";
}
container hal {
config false;
leaf hal-value {
type level;
description
"The highest defined level value seen from all
valid level offers received.";
}
leaf-list system-ids{
type system-id;
description
"The node's system-id of the offered level comes
from.";
}
description
"The highest defined level and the offered nodes set.";
}
leaf-list miscabled-links {
type uint32;
config false;
description
"List of miscabled links.";
}
leaf hop-limit {
type uint8 {
range "1 | 255";
}
default "1";
description
"The IPv4 TTL or IPv6 HL used for LIE and TIE
sending/receiving.";
}
leaf maximum-clock-delta {
type ieee802-1as-timestamp;
description
"The maximum drift for the timestamp comparing.";
reference
"I-D.ietf-rift-rift: RIFT: Routing in Fat Trees.
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Section 6.8.4.";
}
}
list interfaces {
key "name";
leaf link-id {
type uint32;
config false;
description
"The local id of this interface.";
}
leaf name {
type if:interface-ref;
description
"The interface's name.";
}
leaf cost {
type uint32;
description
"The cost from this interface to the neighbor.";
}
leaf rx-flood-port {
type inet:port-number;
default "915";
description
"The UDP port which is used to receive flooded
TIEs. The default port number is 915. The value
can be set to other value associated with different
RIFT instance.";
}
leaf holdtime {
type rt-types:timer-value-seconds16;
units seconds;
default "3";
description
"The holding time of LIE.";
}
uses address-families;
container advertised-source-addr {
uses addresses;
description
"The address used in the advertised LIE and TIE
packets.";
}
uses link-direction-type;
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leaf broadcast-capable {
type boolean;
description
"If LIE can be received by broadcast address.";
reference
"I-D.ietf-rift-rift: RIFT: Routing in Fat Trees.
Section 6.2.";
}
leaf allow-horizontal-link {
type boolean;
description
"If horizontal link adjacency is allowed.";
}
container security {
if-feature link-security;
uses security;
description
"The security function used for this interface.";
reference
"I-D.ietf-rift-rift: RIFT: Routing in Fat Trees.
Section 6.9.3.";
}
leaf security-checking {
type enumeration {
enum "no-checking" {
description
"The security envelope does not be checked.";
}
enum "permissive" {
description
"The security envelope checking is permissive.";
}
enum "loose" {
description
"The security envelope checking is loose.";
}
enum "strict" {
description
"The security envelope checking is strict.";
}
}
description
"The possible security checking types.
Only one type can be set at the same time.";
}
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leaf was-the-last-lie-accepted {
type boolean;
config false;
description
"If the value is set to 'true', it means that
the most recently received LIE was accepted.
If the LIE was rejected, the neighbor error
notifications should be used to find the reason.";
}
leaf last-lie-reject-reason {
type string;
config false;
description
"Description for the reject reason of the last LIE.";
}
container advertised-in-lies {
config false;
uses lie-elements;
description
"The attributes advertised in the LIEs from
this interface.";
}
container link-capabilities {
uses link-capabilities;
description
"The interface's link capabilities.";
}
leaf state {
type enumeration {
enum "one-way" {
description
"The initial state.";
}
enum "two-way" {
description
"Valid LIE received but not a ThreeWay LIE.";
}
enum "three-way" {
description
"Valid ThreeWay LIE received.";
}
enum "multiple-neighbors-wait" {
description
"More than two neighbors found in the same link.";
}
}
config false;
mandatory true;
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description
"The states of LIE finite state machine.";
reference
"I-D.ietf-rift-rift: RIFT: Routing in Fat Trees.
Section 6.2.1.";
}
list neighbors {
key "system-id";
config false;
uses base-node-info;
uses neighbor;
leaf local-nonce {
type uint16;
description
"The exchanged local nonce with this neighbor.";
}
leaf remote-nonce {
type uint16;
description
"The exchanged remote nonce to this neighbor.";
}
action clear-neighbor {
description
"Clears the connection to the neighbor.";
}
description
"The neighbor's information.";
}
action clear-all-neighbors {
description
"Clears all the connections to the neighbors
on this interface.";
}
description
"The interface information on this node.";
} // list interface
container statistics {
config false;
container global {
leaf total-num-routes-north {
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type yang:zero-based-counter32;
config false;
description
"The total number of north routes.";
}
leaf total-num-routes-sourth {
type yang:zero-based-counter32;
config false;
description
"The total number of sourth routes.";
}
description
"The global routes number.";
}
list spf-statistics {
key "spf-direction-type";
uses spf-direction-type;
leaf start-time {
type yang:date-and-time;
description
"The last SPF calculation start time.";
}
leaf end-time {
type yang:date-and-time;
description
"The last SPF calculation end time.";
}
container triggering-tie {
uses tie-header;
description
"The TIE that triggered the SPF.";
}
action clear-spf-statistics {
description
"Clears the statistics of this type of
SPF calculation.";
}
description
"The statistics of SPF calculation.";
}
list interfaces {
key "name";
leaf name {
type if:interface-ref;
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description
"The interface's name.";
}
container intf-states-statistics {
leaf intf-states-startup-time {
type uint64;
description
"The states and statistics record startup time
of the interface.";
}
leaf num-of-nbrs-3way {
type yang:zero-based-counter32;
description
"The number of neighbors which state is in 3-way.";
}
leaf num-of-nbrs-down {
type yang:zero-based-counter32;
description
"The number of neighbors which state
changed to down.";
}
list nbrs-down-reasons {
key "system-id";
leaf system-id {
type system-id;
description
"The system-id of neighbor.";
}
leaf last-down-reason {
type string;
description
"The last down reason of the neighbor.";
}
description
"The down neighbors and reasons.";
}
leaf num-local-level-change {
type yang:zero-based-counter32;
description
"The number of local level changes.";
}
leaf number-of-flaps {
type yang:zero-based-counter32;
config false;
description
"The number of interface state flaps.";
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}
leaf last-state-change {
type yang:date-and-time;
config false;
description
"Time duration in the current state.";
}
leaf last-up {
type yang:date-and-time;
config false;
description
"The last time of up.";
}
leaf last-down {
type yang:date-and-time;
config false;
description
"The last time of down.";
}
container intf-lie-states {
leaf last-lie-sent-time {
type uint64;
description
"The time of the last LIE sent.";
}
leaf last-lie-received-time {
type uint64;
description
"The time of the last LIE received.";
}
leaf num-lie-received {
type yang:zero-based-counter32;
description
"The number of received LIEs.";
}
leaf num-lie-transmitted {
type yang:zero-based-counter32;
description
"The number of transmitted LIEs.";
}
leaf num-lie-drop-invalid-envelope {
type yang:zero-based-counter32;
description
"The number of dropped LIEs due to
invalid outer envelope.";
}
leaf num-lie-drop-invalid-nonce {
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type yang:zero-based-counter32;
description
"The number of dropped LIEs due to
invalid nonce.";
}
leaf num-lie-corrupted {
type yang:zero-based-counter32;
description
"The number of corrupted LIEs received.";
}
description
"The LIE's statistics of this interface.";
}
description
"The states and statistics of this interface.";
}
container flood-repeater-statistics {
leaf flood-repeater {
type system-id;
description
"The system-id of the current flood repeater.
If this leaf has no value, that means the neighbor
is not flood repeater.";
}
leaf num-flood-repeater-changes {
type yang:zero-based-counter32;
description
"The number of flood repeater changes.";
}
leaf last-flood-repeater-change-reason {
type string;
description
"The reason of the last flood repeater change.";
}
description
"The flood repeater statistics.";
}
action clear-intf-statistics {
description
"Clears the statistics of this interface.";
}
description
"The statistics of interfaces.";
}
list neighbors {
key "system-id";
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leaf system-id {
type system-id;
description
"The system-id of the neighbor.";
}
container tie-state-statistics {
leaf transmit-queue {
type yang:zero-based-counter32;
description
"The length of TIE transmit queue.";
}
container last-queued-tie {
uses tie-header;
leaf reason-queued {
type string;
description
"The queued reason of the last queued TIE.";
}
description
"The last queued TIE for transmit.";
}
leaf num-received-ties {
type yang:zero-based-counter32;
description
"The number of TIEs received.";
}
leaf num-transmitted-ties {
type yang:zero-based-counter32;
description
"The number of TIEs transmitted.";
}
leaf num-retransmitted-ties {
type yang:zero-based-counter32;
description
"The number of TIEs retransmitted.";
}
leaf num-flood-reduced-ties {
type yang:zero-based-counter32;
description
"The number of TIEs that were flood reduced.";
}
leaf num-received-tides {
type yang:zero-based-counter32;
description
"The number of TIDEs received.";
}
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leaf num-transmitted-tides {
type yang:zero-based-counter32;
description
"The number of TIDEs transmitted.";
}
leaf num-received-tires {
type yang:zero-based-counter32;
description
"The number of TIREs received.";
}
leaf num-transmitted-tires {
type yang:zero-based-counter32;
description
"The number of TIREs transmitted.";
}
leaf num-request-locally {
type yang:zero-based-counter32;
description
"The number of TIEs requested locally.";
}
leaf num-request-remotely {
type yang:zero-based-counter32;
description
"The number of TIEs requested by the neighbor.";
}
leaf num-same-older-ties-received {
type yang:zero-based-counter32;
description
"The number of times of the same or older TIE
has been received.";
}
leaf num-seq-mismatch-pkts-received {
type yang:zero-based-counter32;
description
"The number of packets with sequence number
mismatches.";
}
container last-sent-tie {
uses tie-header;
leaf last-tie-sent-time {
type yang:date-and-time;
description
"The time of the last TIE sent.";
}
description
"The information of the last sent TIE.";
}
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container last-recv-tie {
uses tie-header;
leaf last-tie-recv-time {
type yang:date-and-time;
description
"The time of the last TIE received.";
}
description
"The information of the last received TIE.";
}
container largest-tie {
container largest-tie-sent {
uses tie-header;
description
"The largest TIE sent.";
}
container largest-tide-sent {
uses tie-header;
description
"The largest TIDE sent.";
}
container largest-tire-sent {
uses tie-header;
description
"The largest TIRE sent.";
}
description
"The largest sent TIE, TIDE and TIRE.";
}
container num-tie-dropped {
leaf num-tie-outer-envelope {
type yang:zero-based-counter32;
description
"The total number of TIEs dropped due to
invalid outer envelope.";
}
leaf num-tie-inner-envelope {
type yang:zero-based-counter32;
description
"The total number of TIEs dropped due to
invalid inner envelope.";
}
leaf num-tie-nonce {
type yang:zero-based-counter32;
description
"The total number of TIEs dropped due to
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invalid nonce.";
}
description
"The total number of TIEs dropped due to
security reasons.";
}
description
"The statistics of TIE, TIDE, TIRE
exchanging with this neighbor.";
}
action clear-nbr-statistics {
description
"Clears the statistics of this neighbor.";
}
description
"The statistics of neighbors.";
}
description
"The statistics collection.";
}
container database {
config false;
list ties {
key "tie-direction-type originator tie-type tie-number";
description
"A list of TIEs (Topology Information Elements).";
uses tie-header;
container node {
leaf level {
type level;
config false;
description
"The level of this node.";
}
list neighbors {
key "system-id";
uses base-node-info;
uses neighbor-node;
description
"The node TIE information of a neighbor.";
}
uses node-capability;
leaf overload-flag {
type boolean;
description
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"If the value is set to 'true', it means that
the overload bit in TIEs is set.";
}
leaf name {
type string;
description
"The name of this node. It won't be used as the
key of node, just used for description.";
}
leaf pod {
type uint32;
description
"Point of Delivery. The self-contained vertical
slice of a Clos or Fat Tree network containing
normally only level 0 and level 1 nodes. It
communicates with nodes in other PoDs via the
spine. We number PoDs to distinguish them and
use PoD #0 to denote 'undefined' PoD.";
}
leaf startup-time {
type uint64;
description
"Startup time of the node.";
}
leaf-list miscabled-links {
type uint32;
config false;
description
"List of miscabled links.";
}
leaf-list same-plane-tofs {
type system-id;
config false;
description
"ToFs in the same plane. Only carried by ToF.
Multiple Node TIEs can carry disjoint sets of
ToFs which MUST be joined to form a single
set.";
}
leaf fabric-id {
type uint32;
config false;
description
"The optional ID of the Fabric configured.";
}
description
"The node element information in this TIE.";
} // node
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container prefixes {
description
"The prefix element information in this TIE.";
list prefixes {
key "prefix";
leaf prefix {
type inet:ip-prefix;
description
"The prefix information.";
}
uses tie-type;
uses prefix-attribute;
description
"The prefix set information.";
}
}
container key-value {
leaf key {
type binary;
description
"The type of key value combination.";
}
leaf value {
type binary;
description
"The value of key value combination.";
}
description
"The information used to distinguish a Key/Value
pair. When the type of kv is set to 'node',
node-element is making sense. When the type of
kv is set to other values except 'node',
prefix-info is making sense.";
} // kv-store
} // ties
description
"The TIEs information in database.";
}// container database
description
"RIFT configuration and state data.";
}//rift
}//augment
/*
* Notifications
*/
notification error-set {
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description
"The errors notification of RIFT.";
container tie-level-error {
description
"The TIE errors notification of RIFT.";
list rift {
key "name";
leaf name {
type string;
description
"The RIFT instance's name.";
}
list ties {
key "originator";
uses tie-header;
description
"The level is undefined in the LIEs.";
}
description
"The TIE errors set.";
}
}
container neighbor-error {
description
"The neighbor errors notification of RIFT.";
list rift {
key "name";
leaf name {
type string;
description
"The RIFT instance's name.";
}
list interfaces {
key "name";
leaf link-id {
type uint32;
description
"The local id of this interface.";
}
leaf name {
type if:interface-ref;
description
"The interface's name.";
}
list neighbors {
key "system-id";
leaf system-id {
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type system-id;
description
"Each node is identified via a system-id which is 64
bits wide.";
}
leaf node-level {
type level;
description
"The level of this node.";
}
description
"The level of the neighbor is wrong.";
}
description
"The interfaces with wrong level neighbor.";
}
description
"The RIFT instance.";
}
}
}
}
<CODE ENDS>
4. Security Considerations
The YANG module specified in this document defines a schema for data
that is designed to be accessed via network management protocols such
as NETCONF [RFC6241] or RESTCONF [RFC8040]. The lowest NETCONF layer
is the secure transport layer, and the mandatory-to-implement secure
transport is Secure Shell (SSH) [RFC6242]. The lowest RESTCONF layer
is HTTPS, and the mandatory-to-implement secure transport is TLS
[RFC8446].
The Network Configuration Access Control Model [RFC8341] provides the
means to restrict access for particular NETCONF or RESTCONF users to
a preconfigured subset of all available NETCONF or RESTCONF protocol
operations and content.
There are a number of data nodes defined in this YANG module that are
writable/creatable/deletable (i.e., config true, which is the
default). These data nodes may be considered sensitive or vulnerable
in some network environments. Write operations (e.g., edit-config)
to these data nodes without proper protection can have a negative
effect on network operations. Writable data node represent
configuration of each instance, node, interface, etc. These
correspond to the following schema node:
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* /rift
Modifying the configuration may cause all the RIFT neighborship to be
rebuilt. For example, the configuration changing of configured-level
or system-id will lead to all the neighbor connections of this node
rebuilt. The incorrect modification of authentication, except for
the neighbor connection broken, will lead to the permanent connection
broken. The modification of interface will lead to the neighbor
state changing. In general, unauthorized modification of most RIFT
configurations will pose their own set of security risks and the
"Security Considerations" in the respective reference RFCs should be
consulted.
Some of the readable data nodes in this YANG module may be considered
sensitive or vulnerable in some network environments. It is thus
important to control read access (e.g., via get, get-config, or
notification) to these data nodes. These are the subtrees and data
nodes and their sensitivity/vulnerability:
* /rift
* /rift/global/tie-security
* /rift/interface
* /rift/interface/neighbor
* /rift/database
The exposure of the database will expose the detailed topology of the
network. Network operators may consider their topologies to be
sensitive confidential data.
For RIFT authentication, configuration is supported via the
specification of key-chains [RFC8177] or the direct specification of
key and authentication algorithm. Hence, authentication
configuration inherits the security considerations of [RFC8177].
This includes the considerations with respect to the local storage
and handling of authentication keys.
The actual authentication key data (whether locally specified or part
of a key chain) is sensitive and needs to be kept secret from
unauthorized parties; compromise of the key data would allow an
attacker to forge RIFT packet that would be accepted as authentic,
potentially compromising the entire domain.
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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. Specifically, the
following operations have particular sensitivities/ vulnerabilities:
* /rift/interface/clear-all-neighbors
* /rift/interface/neighbor/clear-neighbor
* /rift/statistics/spf-statistics/clear-spf-statistics
* /rift/statistics/interface/clear-intf-statistics
* /rift/statistics/interface/neighbors/clear-nbr-statistics
Unauthorized access to either of the above action operations can lead
to the neighbor connection rebuilding or clearing of statistics on
this device.
5. IANA Considerations
RFC Ed.: Please replace all occurrences of 'XXXX' with the actual RFC
number (and remove this note).
This document registers a URI in the IETF XML registry [RFC3688].
Following the format in [RFC3688], the following registration is
requested to be made:
URI: urn:ietf:params:xml:ns:yang:ietf-rift
Registrant Contact: The IESG
XML: N/A, the requested URI is an XML namespace.
This document also requests one new YANG module name in the YANG
Module Names registry [RFC6020] with the following suggestion:
name: ietf-rift
namespace: urn:ietf:params:xml:ns:yang:ietf-rift
prefix: rift
reference: RFC XXXX
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6. Acknowledgement
The authors would like to thank Tony Przygienda, Jordan Head,
Benchong Xu (xu.benchong@zte.com.cn), Tom Petch for their review,
valuable comments and suggestions.
7. References
7.1. Normative References
[I-D.ietf-rift-rift]
Przygienda, T., Head, J., Sharma, A., Thubert, P.,
Rijsman, B., and D. Afanasiev, "RIFT: Routing in Fat
Trees", Work in Progress, Internet-Draft, draft-ietf-rift-
rift-24, 23 May 2024,
<https://datatracker.ietf.org/doc/html/draft-ietf-rift-
rift-24>.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/info/rfc2119>.
[RFC5881] Katz, D. and D. Ward, "Bidirectional Forwarding Detection
(BFD) for IPv4 and IPv6 (Single Hop)", RFC 5881,
DOI 10.17487/RFC5881, June 2010,
<https://www.rfc-editor.org/info/rfc5881>.
[RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for
the Network Configuration Protocol (NETCONF)", RFC 6020,
DOI 10.17487/RFC6020, October 2010,
<https://www.rfc-editor.org/info/rfc6020>.
[RFC6241] Enns, R., Ed., Bjorklund, M., Ed., Schoenwaelder, J., Ed.,
and A. Bierman, Ed., "Network Configuration Protocol
(NETCONF)", RFC 6241, DOI 10.17487/RFC6241, June 2011,
<https://www.rfc-editor.org/info/rfc6241>.
[RFC6242] Wasserman, M., "Using the NETCONF Protocol over Secure
Shell (SSH)", RFC 6242, DOI 10.17487/RFC6242, June 2011,
<https://www.rfc-editor.org/info/rfc6242>.
[RFC6991] Schoenwaelder, J., Ed., "Common YANG Data Types",
RFC 6991, DOI 10.17487/RFC6991, July 2013,
<https://www.rfc-editor.org/info/rfc6991>.
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[RFC7950] Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language",
RFC 7950, DOI 10.17487/RFC7950, August 2016,
<https://www.rfc-editor.org/info/rfc7950>.
[RFC8040] Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF
Protocol", RFC 8040, DOI 10.17487/RFC8040, January 2017,
<https://www.rfc-editor.org/info/rfc8040>.
[RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
May 2017, <https://www.rfc-editor.org/info/rfc8174>.
[RFC8177] Lindem, A., Ed., Qu, Y., Yeung, D., Chen, I., and J.
Zhang, "YANG Data Model for Key Chains", RFC 8177,
DOI 10.17487/RFC8177, June 2017,
<https://www.rfc-editor.org/info/rfc8177>.
[RFC8294] Liu, X., Qu, Y., Lindem, A., Hopps, C., and L. Berger,
"Common YANG Data Types for the Routing Area", RFC 8294,
DOI 10.17487/RFC8294, December 2017,
<https://www.rfc-editor.org/info/rfc8294>.
[RFC8340] Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams",
BCP 215, RFC 8340, DOI 10.17487/RFC8340, March 2018,
<https://www.rfc-editor.org/info/rfc8340>.
[RFC8341] Bierman, A. and M. Bjorklund, "Network Configuration
Access Control Model", STD 91, RFC 8341,
DOI 10.17487/RFC8341, March 2018,
<https://www.rfc-editor.org/info/rfc8341>.
[RFC8342] Bjorklund, M., Schoenwaelder, J., Shafer, P., Watsen, K.,
and R. Wilton, "Network Management Datastore Architecture
(NMDA)", RFC 8342, DOI 10.17487/RFC8342, March 2018,
<https://www.rfc-editor.org/info/rfc8342>.
[RFC8343] Bjorklund, M., "A YANG Data Model for Interface
Management", RFC 8343, DOI 10.17487/RFC8343, March 2018,
<https://www.rfc-editor.org/info/rfc8343>.
[RFC8349] Lhotka, L., Lindem, A., and Y. Qu, "A YANG Data Model for
Routing Management (NMDA Version)", RFC 8349,
DOI 10.17487/RFC8349, March 2018,
<https://www.rfc-editor.org/info/rfc8349>.
[RFC8446] Rescorla, E., "The Transport Layer Security (TLS) Protocol
Version 1.3", RFC 8446, DOI 10.17487/RFC8446, August 2018,
<https://www.rfc-editor.org/info/rfc8446>.
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[RFC8505] Thubert, P., Ed., Nordmark, E., Chakrabarti, S., and C.
Perkins, "Registration Extensions for IPv6 over Low-Power
Wireless Personal Area Network (6LoWPAN) Neighbor
Discovery", RFC 8505, DOI 10.17487/RFC8505, November 2018,
<https://www.rfc-editor.org/info/rfc8505>.
7.2. Informative References
[IEEE8021AS]
"IEEE Standard for Local and Metropolitan Area Networks -
Timing and Synchronization for Time-Sensitive Applications
in Bridged Local Area Networks",
<https://ieeexplore.ieee.org/document/5741898/>.
[RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
DOI 10.17487/RFC3688, January 2004,
<https://www.rfc-editor.org/info/rfc3688>.
[RFC8407] Bierman, A., "Guidelines for Authors and Reviewers of
Documents Containing YANG Data Models", BCP 216, RFC 8407,
DOI 10.17487/RFC8407, October 2018,
<https://www.rfc-editor.org/info/rfc8407>.
[RFC8639] Voit, E., Clemm, A., Gonzalez Prieto, A., Nilsen-Nygaard,
E., and A. Tripathy, "Subscription to YANG Notifications",
RFC 8639, DOI 10.17487/RFC8639, September 2019,
<https://www.rfc-editor.org/info/rfc8639>.
[RFC8641] Clemm, A. and E. Voit, "Subscription to YANG Notifications
for Datastore Updates", RFC 8641, DOI 10.17487/RFC8641,
September 2019, <https://www.rfc-editor.org/info/rfc8641>.
Authors' Addresses
Zheng Zhang
ZTE Corporation
Email: zhang.zheng@zte.com.cn
Yuehua Wei
ZTE Corporation
Email: wei.yuehua@zte.com.cn
Shaowen Ma
Google
Email: mashaowen@gmail.com
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Xufeng Liu
Alef Edge
Email: xufeng.liu.ietf@gmail.com
Bruno Rijsman
Individual
Email: brunorijsman@gmail.com
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