Internet DRAFT - draft-ietf-ccamp-client-signal-yang
draft-ietf-ccamp-client-signal-yang
CCAMP Working Group H. Zheng
Internet-Draft Huawei Technologies
Intended status: Standards Track A. Guo
Expires: 1 August 2024 Futurewei
I. Busi
Huawei Technologies
A. Snitser
Cisco
C. Yu
Huawei Technologies
29 January 2024
A YANG Data Model for Transport Network Client Signals
draft-ietf-ccamp-client-signal-yang-12
Abstract
A transport network is a server-layer network to provide connectivity
services to its client. The topology and tunnel information in the
transport layer has already been defined by generic Traffic-
engineered models and technology-specific models (e.g., OTN, WSON).
However, how the client signals are accessing to the network has not
been described. These information is necessary to both client and
provider.
This draft describes how the client signals are carried over
transport network and defines YANG data models which are required
during configuration procedure. More specifically, several client
signal (of transport network) models including ETH, STM-n, FC and so
on, are defined in this draft.
About This Document
This note is to be removed before publishing as an RFC.
The latest revision of this draft can be found at https://ietf-ccamp-
wg.github.io/draft-ietf-ccamp-client-signal-yang/draft-ietf-ccamp-
client-signal-yang.html. Status information for this document may be
found at https://datatracker.ietf.org/doc/draft-ietf-ccamp-client-
signal-yang/.
Discussion of this document takes place on the Common Control and
Measurement Plane Working Group mailing list (mailto:ccamp@ietf.org),
which is archived at https://mailarchive.ietf.org/arch/browse/ccamp/.
Subscribe at https://www.ietf.org/mailman/listinfo/ccamp/.
Zheng, et al. Expires 1 August 2024 [Page 1]
Internet-Draft Client Signals YANG Model January 2024
Source for this draft and an issue tracker can be found at
https://github.com/ietf-ccamp-wg/draft-ietf-ccamp-client-signal-yang.
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 1 August 2024.
Copyright Notice
Copyright (c) 2024 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents (https://trustee.ietf.org/
license-info) in effect on the date of publication of this document.
Please review these documents carefully, as they describe your rights
and restrictions with respect to this document. Code Components
extracted from this document must include Revised BSD License text as
described in Section 4.e of the Trust Legal Provisions and are
provided without warranty as described in the Revised BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Overview . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Conventions and Definitions . . . . . . . . . . . . . . . . . 4
2.1. Prefixes in Model Names . . . . . . . . . . . . . . . . . 4
2.2. Terminology and Notations . . . . . . . . . . . . . . . . 5
3. Transport Network Client Signal Overview . . . . . . . . . . 5
3.1. Overview of Service Request and Network Configuration
Scenarios . . . . . . . . . . . . . . . . . . . . . . . . 5
3.2. Applicability of Proposed Model . . . . . . . . . . . . . 8
3.2.1. Identifier and Readable Information . . . . . . . . . 8
3.2.2. Unified Resource Identifiers . . . . . . . . . . . . 9
3.2.3. Threshold Configuration . . . . . . . . . . . . . . . 10
Zheng, et al. Expires 1 August 2024 [Page 2]
Internet-Draft Client Signals YANG Model January 2024
3.3. State data of Services . . . . . . . . . . . . . . . . . 11
3.3.1. Generic Requirements . . . . . . . . . . . . . . . . 11
3.3.2. Timestamp and Administrative information . . . . . . 11
3.3.3. performance monitoring status . . . . . . . . . . . . 12
3.3.4. Error Message Report . . . . . . . . . . . . . . . . 13
4. YANG Model for Transport Network Client Signal . . . . . . . 14
4.1. YANG Tree for Ethernet Service . . . . . . . . . . . . . 14
4.2. YANG Tree for other Transport Network Client Signal
Model . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5. YANG Code for Transport Network Client Signal . . . . . . . . 21
5.1. The ETH Service YANG Code . . . . . . . . . . . . . . . . 21
5.2. YANG Code for ETH type . . . . . . . . . . . . . . . . . 41
5.3. Other Client Signal YANG Code . . . . . . . . . . . . . . 51
5.4. Other Client Signal Types YANG Code . . . . . . . . . . . 59
6. Implementation Status . . . . . . . . . . . . . . . . . . . . 60
6.1. Usage of the ETH Service YANG Model on ONAP . . . . . . . 61
7. Manageability Considerations . . . . . . . . . . . . . . . . 62
8. Security Considerations . . . . . . . . . . . . . . . . . . . 62
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 62
10. References . . . . . . . . . . . . . . . . . . . . . . . . . 63
10.1. Normative References . . . . . . . . . . . . . . . . . . 63
10.2. Informative References . . . . . . . . . . . . . . . . . 65
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 67
Contributors . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 68
1. Introduction
1.1. Overview
A transport network is a server-layer network designed to provide
connectivity services for a client-layer network to carry the client
traffic transparently across the server-layer network resources.
Currently the topology and tunnel models have been defined for
transport networks, including [I-D.ietf-ccamp-otn-topo-yang] and
[I-D.ietf-ccamp-otn-tunnel-model], providing server-layer topology
abstraction and tunnel configuration between PEs. However, there is
a missing piece for configuring how the PEs should map the client-
layer traffic, received from the CE, over the server-layer tunnels:
this gap is expected to be solved in this document.
This document defines a data model of all transport network client
signals, using YANG language defined in [RFC7950]. The model can be
used by applications exposing to a transport network controller via a
RESTconf interface. Furthermore, it can be used by an application
for the following purposes (but not limited to):
Zheng, et al. Expires 1 August 2024 [Page 3]
Internet-Draft Client Signals YANG Model January 2024
* To request/update an end-to-end service by driving a new tunnel to
be set up to support this service;
* To request/update an end-to-end service by using an existing
tunnel;
* To receive notification with regard to the information change of
the given service;
The YANG modules defined in this document conforms to the Network
Management Datastore Architecture (NMDA) defined in [RFC8342].
2. Conventions and Definitions
2.1. Prefixes in Model Names
In this document, names of data nodes and other data model objects
are prefixed using the standard prefix associated with the
corresponding YANG imported modules, including [RFC6991], [RFC8294]
and [I-D.ietf-ccamp-otn-tunnel-model], which are shown as follow.
+============+=============================+===========+
| Prefix | YANG module | Reference |
+============+=============================+===========+
| yang | ietf-yang-types | [RFC6991] |
+------------+-----------------------------+-----------+
| rt-types | ietf-routing-types | [RFC8294] |
+------------+-----------------------------+-----------+
| te-types | ietf-te-types | [RFCYYYY] |
+------------+-----------------------------+-----------+
| l1-types | ietf-layer1-types | [RFCZZZZ] |
+------------+-----------------------------+-----------+
| nw | ietf-network | [RFC8345] |
+------------+-----------------------------+-----------+
| nt | ietf-network-topology | [RFC8345] |
+------------+-----------------------------+-----------+
| te | ietf-te | [RFCKKKK] |
+------------+-----------------------------+-----------+
| clnt-types | ietf-trans-client-svc-types | RFC XXXX |
+------------+-----------------------------+-----------+
| etht-types | ietf-eth-tran-types | RFC XXXX |
+------------+-----------------------------+-----------+
| clnt-svc | ietf-trans-client-service | RFC XXXX |
+------------+-----------------------------+-----------+
| etht-svc | ietf-eth-tran-service | RFC XXXX |
+------------+-----------------------------+-----------+
Table 1: Prefixes and corresponding YANG modules
Zheng, et al. Expires 1 August 2024 [Page 4]
Internet-Draft Client Signals YANG Model January 2024
RFC Editor Note: Please replace XXXX with the number assigned to the
RFC once this draft becomes an RFC. Please replace YYYY with the RFC
numbers assigned to [I-D.ietf-teas-rfc8776-update]. Please replace
ZZZZ with the RFC numbers assigned to [I-D.ietf-ccamp-layer1-types].
Please replace KKKK with the RFC numbers assigned to
[I-D.ietf-teas-yang-te].
2.2. Terminology and Notations
A simplified graphical representation of the data model is used in
this document. The meaning of the symbols in the YANG data tree
presented later in this document is defined in [RFC8340]. They are
provided below for reference.
* Brackets "[" and "]" enclose list keys.
* Abbreviations before data node names: "rw" means configuration
(read-write) and "ro" state data (read-only).
* Symbols after data node names: "?" means an optional node, "!"
means a presence container, and "*" denotes a list and leaf-list.
* Parentheses enclose choice and case nodes, and case nodes are also
marked with a colon (":").
* Ellipsis ("...") stands for contents of subtrees that are not
shown.
3. Transport Network Client Signal Overview
3.1. Overview of Service Request and Network Configuration Scenarios
A global view of a multi-domain service can be described as the
Figure 1. The customer is usually responsible to configure the CE
nodes and to request to the provider the service intent, from the CE
nodes perspective, while the provider is responsible to configure the
whole network (including the PE nodes) to support the customer
service intent. Generally speaking, the network configurations
required to support a customer service can be split into two
different groups: CE-PE and PE-PE. The CE-PE configuration deals
with the client layer one-hop access link, while PE-PE configuration
deals with the server layer tunnel. In Figure 1 we mark the
intermediate nodes as 'P', which has same switching capability of PE
but just not the 'end-point'. In this example, the link P-P and PE-P
are a server-layer intra-domain or inter-domain link.
Zheng, et al. Expires 1 August 2024 [Page 5]
Internet-Draft Client Signals YANG Model January 2024
+----+ +----+
| CE | | CE |
+--+-+ +--+-+
| |
| ------------- -------------|
//|/ \\\\ ///// |\\\\
// | \\ // | \\
| +--+-+ +---+ +---+ | | +---+ +---+ +--+-+ |
| | PE +----+ P +--+ P +---+-----+--+ P +---+ P +---+ PE | |
| +----+ +---+ +---+ | | +---+ +---+ +----+ |
\\ // \\ //
\\\\ //// \\\\\ /////
------------- -------------
Domain 1 Domain 2
Figure 1: Global view of Client Service with the Network Provider
According to the responsibilities of each controller in [RFC8453],
the controllers have different views of the service request and
network configuration. The duty of CNC is to give the MDSC a
description of the customer service intent: candidate YANG models
include L1CSM [I-D.ietf-ccamp-l1csm-yang], L2SM [RFC8466] and L3SM
[RFC8299], which are classified as customer service models, according
to [RFC8309]. These models provide necessary attributes to describe
the customer service intent from the customer/CE perspective, and do
not provide any specific network configuration. These models also
implies that the customer service description can be considered in a
separate manner rather than integratig with network configurations,
which also enable the controllers to abstract/virtualize the network
resource to make them visible to the customer and also easier to
manage. In other words, the network knowledge is not necessary at
CNC and CMI, which is seen in an abstracted form as shown in
Figure 2.
/---------\
/// \\\
+----+ | | +----+
| CE |--------------+ NETWORK +----------------| CE |
+----+ | | +----+
\\\ ///
\---------/
Figure 2: CNC Viewpoint on the Client Service
The functionalities of MDSC have been described in [RFC8453], which
include the customer mapping/translation and multi-domain
coordination. By receiving the request from CNC, MDSC need to
understand what network configuration can support the customer
Zheng, et al. Expires 1 August 2024 [Page 6]
Internet-Draft Client Signals YANG Model January 2024
service intent and turn to the corresponding PNCs for configuration.
The service request is therefore decomposed by MDSC into a few
network configurations and forwarded to one or multiple PNCs
respectively in single-domain and multi-domain scenario. In general,
the MDSC has the view of both PE and CE nodes and of some abstract
information regarding the P nodes, as shown in Figure 3. It is worth
noting that this MDSC view is different with Figure 1 at the intra-
domain link. Usually these details are hidden, for scalability
purposes, and therefore the MDSC has only an abstract view of each
domain internal topology.
------ -----
//// \\\\ ///- -\\\
// \\ // \\
+----+ | +----+ +---+ | |+---+ +----+ | +----+
| CE |-----+-| PE |-----| P |-+--+| P |-----| PE |-+-----| CE |
+----+ | +----+ +---+ | |+---+ +----+ | +----+
\\ // \\ //
\\\\ //// \\\- -///
------ -----
Domain 1 Domain 2
Figure 3: MDSC view of both Client Service and Network Abstraction
PNC is the controller that configure the physical devices, based on
the network configuration received from the MDSC. Each PNC has the
detailed view of its own domain, the example of view from PNC in
domain 1 is shown in Figure 4. The PNC has all the detailed topology
information on PE and P nodes and on the intra-domain links. The PNC
configures the tunnel/tunnel segment within its domain based on the
network configuration provided by the MDSC. The PNC also configures
the network part of the CE-PE access links as well as the mapping of
the client-layer traffic and the server-layer tunnels, based on the
network configuration provided by the MDSC. The interaction between
PNC and MDSC for the client-layer network configuration is
accomplished by the models defined in this draft.
| | |
| ------------- | -------------|
//|/ \\\\ | ///// |\\\\
// | \\ | // | \\
| +--+-+ +---+ +---+ | | | +---+ +---+ +--+-+ |
| | PE +----+ P +--+ P +---+--+--+--+ P +---+ P +---+ PE | |
| +----+ +---+ +---+ | | | +---+ +---+ +----+ |
\\ // | \\ //
\\\\ //// | \\\\\ /////
------------- | -------------
PNC View in Domain 1 | PNC View in Domain 2
Zheng, et al. Expires 1 August 2024 [Page 7]
Internet-Draft Client Signals YANG Model January 2024
Figure 4: PNC view on Network Configuration
3.2. Applicability of Proposed Model
Existing TE and technology-specific models, such as topology models
and tunnel models, support the network configuration among PEs and
Ps. The customer service models, such as L1CSM, L2SM and L3SM, focus
on describing the attributes among CEs. However, there is a missing
piece on how to configure the CE-PE session. The models defined in
this document provide the configuration on CE-PE when the provider
server-layer network is TE-based technology.
In the example of OTN as the server-layer transport network, a full
list of G-PID was summarized in [RFC7139], which can be divided into
a few categories. The G-PID signals can be categorized into
transparent and non-transparent. Examples of transparent signals may
include Ethernetphysical interfaces, FC, STM-n and so on. In this
approach the OTN devices is not aware of the client signal type, and
this information is only necessary among the controllers. Once the
OTN tunnel is set up, there is no switching requested on the client
layer, and therefore only signal mapping is needed, without a client
tunnel set up. The models that supporting the configuration of
transparent signals are defined in Section 4.2. The other category
would be non-transparent, such as Carrier Ethernet and MPLS-TP, with
a switching request on the client layer. Once the OTN tunnel is set
up, a corresponding tunnel in the client layer has to be set up to
carry services. The models that supporting the configuration of
transparent signals are defined in Section 4.1.
It is also worth noting that some client signal can be carried over
multiple types of networks. For example, the Ethernet services can
be carried over either OTN or Ethernet TE tunnels (over optical or
microwave networks). The model specified in this document allows the
support from networks with different technologies. The list of
identities for client signals are defined in
[I-D.ietf-ccamp-layer1-types].
3.2.1. Identifier and Readable Information
Name: The identifier of the client signal service can be configured
or retrieved by the name information. The naming of this attribute
is based on the requirements of unifying with TE tunnel models. It
can be readable or unreadable. If it is readable, to make it unique,
it is needed to specify a unified structure for all the PNC systems.
It is hard to do that for the reason of a lot of customized
requirements from different Operators. In the ICT technology, UUID
format could be a good option. Title: The title of client signal
service can be configured with its readable name. Description: More
Zheng, et al. Expires 1 August 2024 [Page 8]
Internet-Draft Client Signals YANG Model January 2024
detail information of client signal service, such as some
administrative information or location information. User-label: An
alias of client signal service which is used to tag based on the
maintenance requirement.
module: ietf-trans-client-service
+--rw client-svc
+--rw client-svc-instances* [client-svc-name]
+--rw client-svc-name string
+--rw client-svc-title? string
+--rw user-label? string
+--rw client-svc-descr? string
...................................
module: ietf-eth-tran-service
+--rw etht-svc-instances* [etht-svc-name]
+--rw etht-svc-name string
+--rw etht-svc-title? string
+--rw user-label? string
+--rw etht-svc-descr? string
...................................
3.2.2. Unified Resource Identifiers
In [I-D.ietf-teas-rfc8776-update], it is recognized that if the used
topology resource adopts TE modeling, there could be two identifier
systems, one is the network modeling system and the other one from TE
topology modeling. The access ports of client signal service or end
points of Ethernet service also adopt the TE topology resources. So
two identifiers are both fine to specified in the configuration
requests.
Zheng, et al. Expires 1 August 2024 [Page 9]
Internet-Draft Client Signals YANG Model January 2024
module: ietf-trans-client-service
+--rw client-svc
+--rw client-svc-instances* [client-svc-name]
+--rw src-access-ports
| +--rw access-node-id? te-types:te-node-id
| +--rw access-node-uri? nw:node-id
| +--rw access-ltp-id? te-types:te-tp-id
| +--rw access-ltp-uri? nt:tp-id
| +--rw client-signal? identityref
+--rw dst-access-ports
+--rw access-node-id? te-types:te-node-id
+--rw access-node-uri? nw:node-id
+--rw access-ltp-id? te-types:te-tp-id
+--rw access-ltp-uri? nt:tp-id
+--rw client-signal? identityref
...................................
module: ietf-eth-tran-service
+--rw etht-svc
+--rw etht-svc-instances* [etht-svc-name]
+--rw etht-svc-end-points* [etht-svc-end-point-name]
+--rw etht-svc-access-points* [access-point-id]
+--rw access-point-id string
+--rw access-node-id? te-types:te-node-id
+--rw access-node-uri? nw:node-id
+--rw access-ltp-id? te-types:te-tp-id
+--rw access-ltp-uri? nt:tp-id
+--rw access-role? identityref
...................................
3.2.3. Threshold Configuration
Some PM data are quite critical for client signal service users'
experience, e.g. latency value. For the Operators, they can
configure a service-oriented threshold for the PM data, to make the
maintenance engineer recognize the network issues in time.
Zheng, et al. Expires 1 August 2024 [Page 10]
Internet-Draft Client Signals YANG Model January 2024
module: ietf-trans-client-service
+--rw client-svc
+--rw client-svc-instances* [client-svc-name]
+--rw alarm-shreshold
+--rw latency-threshold? uint32
...................................
module: ietf-eth-tran-service
+--rw etht-svc
+--rw etht-svc-instances* [etht-svc-name]
+--rw alarm-shreshold
+--rw latency-threshold? uint32
...................................
3.3. State data of Services
3.3.1. Generic Requirements
States have been defined to retrieve the status of the delivered
services. A few generic states defined in
[I-D.ietf-teas-rfc8776-update] are reused in this document. These
states include the operational state and the provisioning state.
module: ietf-trans-client-service
+--rw client-svc
+--rw client-svc-instances* [client-svc-name]
+--ro operational-state? identityref
+--ro provisioning-state? identityref
...................................
module: ietf-eth-tran-service
+--rw etht-svc
+--rw etht-svc-instances* [etht-svc-name]
+--ro state
+--ro operational-state? identityref
+--ro provisioning-state? identityref
...................................
3.3.2. Timestamp and Administrative information
A few other parameters are defined for the management of the
services. Given the complicated labor division, the creation, update
and maintainance may have different responsible systems. So the log
of the service would be helpful and should be easy to retrived in a
standard way as well. These information include, but not restricted
to the following:
Zheng, et al. Expires 1 August 2024 [Page 11]
Internet-Draft Client Signals YANG Model January 2024
* When the service is created and has been last updated, these are
specified in the creation-time and last-updated-time.
* Who created the service and who made the last update to the
service, these are specified in the created-by and last-updated-
by.
* The owner of the service is specifed as owned-by, which would be
useful when the service is delegated by or to a specific system.
The identifier of the system is used to represent such
information.
module: ietf-trans-client-service
+--rw client-svc
+--rw client-svc-instances* [client-svc-name]
+--ro creation-time? yang:date-and-time
+--ro last-updated-time? yang:date-and-time
+--ro created-by? string
+--ro last-updated-by? string
+--ro owned-by? string
...................................
module: ietf-eth-tran-service
+--rw etht-svc
+--rw etht-svc-instances* [etht-svc-name]
+--ro state
+--ro creation-time? yang:date-and-time
+--ro last-updated-time? yang:date-and-time
+--ro created-by? string
+--ro last-updated-by? string
+--ro owned-by? string
...................................
3.3.3. performance monitoring status
For the Operators, there are also some requirements to provide some
PM data to the service users. Especially some PM data are quite
critical for users' experience.
For example, one of the great advantage of client signal service is
it can provide deterministic low latency. Some industry users, e.g.
stock trading company, have great demand of stable short latency
service to ensure their high-frequency fast trading operations can be
finished quickly and definitely. In addition to provision a low-
latency client signal service, Operators can also provide some other
differentiated services for these kinds of service users. For
example latency visibility can be provided to the users, to let them
monitor the latency values.
Zheng, et al. Expires 1 August 2024 [Page 12]
Internet-Draft Client Signals YANG Model January 2024
The latency measurement mechanism can be referenced from sub-clause
7.10.1 of [ITU-T_G.875]. And PNC can provide a measurement latency
after service is provisioned if the devices support this measurement
mechanism. Otherwise providing an estimated value could be a
workaround solution.
module: ietf-trans-client-service
+--rw client-svc
+--rw client-svc-instances* [client-svc-name]
+--ro pm-state
+--ro latency? uint32
...................................
module: ietf-eth-tran-service
+--rw etht-svc
+--rw etht-svc-instances* [etht-svc-name]
+--ro state
+--ro pm-state
+--ro latency? uint32
...................................
3.3.4. Error Message Report
Once the processing of client signal service configuration, including
creation, updating, deletion, meets with some internal problems, such
as no enough available bandwidth, or wrong client signal mapping
.etc., the problems should be reported to the client system to make
the issues read by the maintenance engineers. Since these error
messages are more technologies-specific, especially sometimes
accurate location information is needed in these messages, it is hard
to standardize these error messages by RESTCONF protocol errors. For
the client systems, they would like to get these messages both from
notifications and retrieval. So this document defines an error
container in the YANG data model to let the PNC to provide these
messages.
Zheng, et al. Expires 1 August 2024 [Page 13]
Internet-Draft Client Signals YANG Model January 2024
module: ietf-trans-client-service
+--rw client-svc
+--rw client-svc-instances* [client-svc-name]
+--ro error-info
+--ro error-code? uint16
+--ro error-description? string
+--ro error-timestamp? yang:date-and-time
...................................
module: ietf-eth-tran-service
+--rw etht-svc
+--rw etht-svc-instances* [etht-svc-name]
+--rw etht-svc-end-points* [etht-svc-end-point-name]
+--ro state
+--ro error-info
+--ro error-code? uint16
+--ro error-description? string
+--ro error-timestamp? yang:date-and-time
...................................
4. YANG Model for Transport Network Client Signal
4.1. YANG Tree for Ethernet Service
=============== NOTE: '\' line wrapping per RFC 8792 ================
module: ietf-eth-tran-service
+--rw etht-svc
+--rw globals
| +--rw named-bandwidth-profiles* [bandwidth-profile-name]
| +--rw bandwidth-profile-name string
| +--rw bandwidth-profile-type?
| | etht-types:bandwidth-profile-type
| +--rw CIR? uint64
| +--rw CBS? uint64
| +--rw EIR? uint64
| +--rw EBS? uint64
| +--rw color-aware? boolean
| +--rw coupling-flag? boolean
+--rw etht-svc-instances* [etht-svc-name]
+--rw etht-svc-name string
+--rw etht-svc-title? string
+--rw user-label? string
+--rw etht-svc-descr? string
+--rw etht-svc-customer? string
+--rw etht-svc-type? etht-types:service-type
+--rw etht-svc-lifecycle? etht-types:lifecycle-status
+--rw te-topology-identifier
Zheng, et al. Expires 1 August 2024 [Page 14]
Internet-Draft Client Signals YANG Model January 2024
| +--rw provider-id? te-global-id
| +--rw client-id? te-global-id
| +--rw topology-id? te-topology-id
+--rw resilience
| +--rw protection
| | +--rw protection-type? identityref
| | +--rw protection-reversion-disable? boolean
| | +--rw hold-off-time? uint32
| | +--rw wait-to-revert? uint16
| | +--rw aps-signal-id? uint8
| +--rw restoration
| +--rw restoration-type? identityref
| +--rw restoration-scheme? identityref
| +--rw restoration-reversion-disable? boolean
| +--rw hold-off-time? uint32
| +--rw wait-to-restore? uint16
| +--rw wait-to-revert? uint16
+--rw etht-svc-end-points* [etht-svc-end-point-name]
| +--rw etht-svc-end-point-name string
| +--rw etht-svc-end-point-id? string
| +--rw etht-svc-end-point-descr? string
| +--rw topology-role?
| | identityref
| +--rw resilience
| +--rw etht-svc-access-points* [access-point-id]
| | +--rw access-point-id string
| | +--rw access-node-id? te-types:te-node-id
| | +--rw access-node-uri? nw:node-id
| | +--rw access-ltp-id? te-types:te-tp-id
| | +--rw access-ltp-uri? nt:tp-id
| | +--rw access-role? identityref
| | +--rw pm-config
| | | +--rw pm-enable? boolean
| | | +--rw sending-rate-high? uint64
| | | +--rw sending-rate-low? uint64
| | | +--rw receiving-rate-high? uint64
| | | +--rw receiving-rate-low? uint64
| | +--ro state
| | | +--ro operational-state? identityref
| | | +--ro provisioning-state? identityref
| | +--ro performance? identityref
| +--rw service-classification-type?
| | identityref
| +--rw (service-classification)?
| | +--:(port-classification)
| | +--:(vlan-classification)
| | +--rw outer-tag!
| | | +--rw tag-type?
Zheng, et al. Expires 1 August 2024 [Page 15]
Internet-Draft Client Signals YANG Model January 2024
| | | | etht-types:eth-tag-classify
| | | +--rw (individual-bundling-vlan)?
| | | +--:(individual-vlan)
| | | | +--rw vlan-value? etht-types:vlanid
| | | +--:(vlan-bundling)
| | | +--rw vlan-range?
| | | etht-types:vid-range-type
| | +--rw second-tag!
| | +--rw tag-type?
| | | etht-types:eth-tag-classify
| | +--rw (individual-bundling-vlan)?
| | +--:(individual-vlan)
| | | +--rw vlan-value? etht-types:vlanid
| | +--:(vlan-bundling)
| | +--rw vlan-range?
| | etht-types:vid-range-type
| +--rw split-horizon-group? string
| +--rw (direction)?
| | +--:(symmetrical)
| | | +--rw ingress-egress-bandwidth-profile
| | | +--rw (style)?
| | | +--:(named)
| | | | +--rw bandwidth-profile-name? leafref
| | | +--:(value)
| | | +--rw bandwidth-profile-type?
| | | | etht-types:bandwidth-profile-type
| | | +--rw CIR? uint64
| | | +--rw CBS? uint64
| | | +--rw EIR? uint64
| | | +--rw EBS? uint64
| | | +--rw color-aware? boolean
| | | +--rw coupling-flag? boolean
| | +--:(asymmetrical)
| | +--rw ingress-bandwidth-profile
| | | +--rw (style)?
| | | +--:(named)
| | | | +--rw bandwidth-profile-name? leafref
| | | +--:(value)
| | | +--rw bandwidth-profile-type?
| | | | etht-types:bandwidth-profile-type
| | | +--rw CIR? uint64
| | | +--rw CBS? uint64
| | | +--rw EIR? uint64
| | | +--rw EBS? uint64
| | | +--rw color-aware? boolean
| | | +--rw coupling-flag? boolean
| | +--rw egress-bandwidth-profile
| | +--rw (style)?
Zheng, et al. Expires 1 August 2024 [Page 16]
Internet-Draft Client Signals YANG Model January 2024
| | +--:(named)
| | | +--rw bandwidth-profile-name? leafref
| | +--:(value)
| | +--rw bandwidth-profile-type?
| | | etht-types:bandwidth-profile-type
| | +--rw CIR? uint64
| | +--rw CBS? uint64
| | +--rw EIR? uint64
| | +--rw EBS? uint64
| | +--rw color-aware? boolean
| | +--rw coupling-flag? boolean
| +--rw vlan-operations
| +--rw (direction)?
| +--:(symmetrical)
| | +--rw symmetrical-operation
| | +--rw pop-tags? uint8
| | +--rw push-tags
| | +--rw outer-tag!
| | | +--rw tag-type?
| | | | etht-types:eth-tag-type
| | | +--rw vlan-value? etht-types:vlanid
| | | +--rw default-pcp? uint8
| | +--rw second-tag!
| | +--rw tag-type?
| | | etht-types:eth-tag-type
| | +--rw vlan-value? etht-types:vlanid
| | +--rw default-pcp? uint8
| +--:(asymmetrical)
| +--rw asymmetrical-operation
| +--rw ingress
| | +--rw pop-tags? uint8
| | +--rw push-tags
| | +--rw outer-tag!
| | | +--rw tag-type?
| | | | etht-types:eth-tag-type
| | | +--rw vlan-value?
| | | | etht-types:vlanid
| | | +--rw default-pcp? uint8
| | +--rw second-tag!
| | +--rw tag-type?
| | | etht-types:eth-tag-type
| | +--rw vlan-value?
| | | etht-types:vlanid
| | +--rw default-pcp? uint8
| +--rw egress
| +--rw pop-tags? uint8
| +--rw push-tags
| +--rw outer-tag!
Zheng, et al. Expires 1 August 2024 [Page 17]
Internet-Draft Client Signals YANG Model January 2024
| | +--rw tag-type?
| | | etht-types:eth-tag-type
| | +--rw vlan-value?
| | | etht-types:vlanid
| | +--rw default-pcp? uint8
| +--rw second-tag!
| +--rw tag-type?
| | etht-types:eth-tag-type
| +--rw vlan-value?
| | etht-types:vlanid
| +--rw default-pcp? uint8
+--rw alarm-threshold
| +--rw latency-threshold? uint32
+--rw underlay
| +--rw (technology)?
| | +--:(native-ethernet)
| | | +--rw eth-tunnels* [name]
| | | +--rw name
| | | | -> /te:te/tunnels/tunnel/name
| | | +--rw encoding? identityref
| | | +--rw switching-type? identityref
| | +--:(frame-base)
| | | +--rw otn-tunnels* [name]
| | | +--rw name
| | | | -> /te:te/tunnels/tunnel/name
| | | +--rw encoding? identityref
| | | +--rw switching-type? identityref
| | +--:(mpls-tp)
| | +--rw pw
| | +--rw pw-id? string
| | +--rw pw-name? string
| | +--rw transmit-label?
| | | rt-types:mpls-label
| | +--rw receive-label?
| | | rt-types:mpls-label
| | +--rw encapsulation-type? identityref
| | +--ro oper-status? identityref
| | +--rw ingress-bandwidth-profile
| | | +--rw (style)?
| | | +--:(named)
| | | | +--rw bandwidth-profile-name? leafref
| | | +--:(value)
| | | +--rw bandwidth-profile-type?
| | | | etht-types:bandwidth-profile-ty\
pe
| | | +--rw CIR? uint64
| | | +--rw CBS? uint64
| | | +--rw EIR? uint64
Zheng, et al. Expires 1 August 2024 [Page 18]
Internet-Draft Client Signals YANG Model January 2024
| | | +--rw EBS? uint64
| | +--rw pw-paths* [path-id]
| | +--rw path-id uint8
| | +--rw tp-tunnels* [name]
| | +--rw name string
| +--rw src-split-horizon-group? string
| +--rw dst-split-horizon-group? string
+--rw admin-status? identityref
+--ro state
+--ro operational-state? identityref
+--ro provisioning-state? identityref
+--ro creation-time? yang:date-and-time
+--ro last-updated-time? yang:date-and-time
+--ro created-by? string
+--ro last-updated-by? string
+--ro owned-by? string
+--ro pm-state
| +--ro latency? uint32
+--ro error-info
+--ro error-code? uint16
+--ro error-description? string
+--ro error-timestamp? yang:date-and-time
Figure 5
4.2. YANG Tree for other Transport Network Client Signal Model
Zheng, et al. Expires 1 August 2024 [Page 19]
Internet-Draft Client Signals YANG Model January 2024
module: ietf-trans-client-service
+--rw client-svc
+--rw client-svc-instances* [client-svc-name]
+--rw client-svc-name string
+--rw client-svc-title? string
+--rw user-label? string
+--rw client-svc-descr? string
+--rw client-svc-customer? string
+--rw resilience
+--rw te-topology-identifier
| +--rw provider-id? te-global-id
| +--rw client-id? te-global-id
| +--rw topology-id? te-topology-id
+--rw admin-status? identityref
+--rw src-access-ports
| +--rw access-node-id? te-types:te-node-id
| +--rw access-node-uri? nw:node-id
| +--rw access-ltp-id? te-types:te-tp-id
| +--rw access-ltp-uri? nt:tp-id
| +--rw client-signal? identityref
+--rw dst-access-ports
| +--rw access-node-id? te-types:te-node-id
| +--rw access-node-uri? nw:node-id
| +--rw access-ltp-id? te-types:te-tp-id
| +--rw access-ltp-uri? nt:tp-id
| +--rw client-signal? identityref
+--ro pm-state
| +--ro latency? uint32
+--ro error-info
| +--ro error-code? uint16
| +--ro error-description? string
| +--ro error-timestamp? yang:date-and-time
+--rw alarm-threshold
| +--rw latency-threshold? uint32
+--rw direction? identityref
+--rw svc-tunnels* [tunnel-name]
| +--rw tunnel-name string
+--ro operational-state? identityref
+--ro provisioning-state? identityref
+--ro creation-time? yang:date-and-time
+--ro last-updated-time? yang:date-and-time
+--ro created-by? string
+--ro last-updated-by? string
+--ro owned-by? string
Figure 6
Zheng, et al. Expires 1 August 2024 [Page 20]
Internet-Draft Client Signals YANG Model January 2024
5. YANG Code for Transport Network Client Signal
5.1. The ETH Service YANG Code
This module imports typedefs and modules from [RFC6991], [RFC8294],
[I-D.ietf-teas-rfc8776-update].
<CODE BEGINS> file "ietf-eth-tran-service@2024-01-11.yang"
module ietf-eth-tran-service {
yang-version 1.1;
namespace "urn:ietf:params:xml:ns:yang:ietf-eth-tran-service";
prefix etht-svc;
import ietf-yang-types {
prefix yang;
reference
"RFC 6991: Common YANG Data Types";
}
import ietf-routing-types {
prefix rt-types;
reference
"RFC 8294: Common YANG Data Types for the Routing Area";
}
import ietf-te-types {
prefix te-types;
reference "RFCYYYY: Traffic Engineering Common YANG Types";
}
// RFC Editor: replace YYYY with the actual RFC number assigned
// to the RFC once draft-ietf-teas-rfc8776-update
// becomes an RFC, update date information and remove this note.
import ietf-network {
prefix nw;
reference
"RFC8345: A YANG Data Model for Network Topologies";
}
import ietf-network-topology {
prefix "nt";
reference
"RFC8345: A YANG Data Model for Network Topologies";
}
import ietf-te {
prefix "te";
reference
Zheng, et al. Expires 1 August 2024 [Page 21]
Internet-Draft Client Signals YANG Model January 2024
"RFCKKKK: A YANG Data Model for Traffic Engineering Tunnels
and Interfaces";
}
// RFC Editor: replace KKKK with the actual RFC number assigned
// to the RFC once draft-ietf-teas-yang-te
// becomes an RFC, update date information and remove this note.
import ietf-eth-tran-types {
prefix etht-types;
reference
"RFCXXXX: A YANG Data Model for Transport Network Client
Signals";
}
// RFC Editor: replace XXXX with the actual RFC number assigned
// to the RFC once this draft
// becomes an RFC, update date information and remove this note.
organization
"Internet Engineering Task Force (IETF) CCAMP WG";
contact
"WG Web: <https://datatracker.ietf.org/wg/ccamp/>
WG List: <mailto:ccamp@ietf.org>
Editor: Haomian Zheng
<mailto:zhenghaomian@huawei.com>
Editor: Aihua Guo
<mailto:aihuaguo.ietf@gmail.com>
Editor: Italo Busi
<mailto:italo.busi@huawei.com>
Editor: Anton Snitser
<mailto:asnizar@cisco.com>
Editor: Chaode Yu
<mailto:yuchaode@huawei.com>";
description
"This module defines a YANG data model for describing
Ethernet transport network client services.
The model fully conforms to the Network Management
Datastore Architecture (NMDA).
Copyright (c) 2024 IETF Trust and the persons
identified as authors of the code. All rights reserved.
Zheng, et al. Expires 1 August 2024 [Page 22]
Internet-Draft Client Signals YANG Model January 2024
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; see
the RFC itself for full legal notices.";
revision 2024-01-11 {
description
"Initial Version";
reference
"RFC XXXX: A YANG Data Model for Transport Network Client
Signals";
}
// RFC Editor: replace XXXX with the actual RFC number assigned
// to the RFC once this draft
// becomes an RFC, update date information and remove this note.
/*
* Groupings
*/
grouping vlan-classification {
description
"A grouping which represents classification
on an 802.1Q VLAN tag.";
leaf tag-type {
type etht-types:eth-tag-classify;
description
"The tag type used for VLAN classification.";
}
choice individual-bundling-vlan {
description
"VLAN based classification can be individual
or bundling.";
case individual-vlan {
leaf vlan-value {
type etht-types:vlanid;
description
"VLAN ID value.";
}
}
case vlan-bundling {
Zheng, et al. Expires 1 August 2024 [Page 23]
Internet-Draft Client Signals YANG Model January 2024
leaf vlan-range {
type etht-types:vid-range-type;
description
"List of VLAN ID values.";
}
}
}
}
grouping vlan-write {
description
"A grouping which represents push/pop operations
of an 802.1Q VLAN tag.";
leaf tag-type {
type etht-types:eth-tag-type;
description
"The VLAN tag type to push/swap.";
}
leaf vlan-value {
type etht-types:vlanid;
description
"The VLAN ID value to push/swap.";
}
/*
* To be added: this attribute is used when:
* a) the ETH service has only one CoS (as in current version)
* b) as a default when a mapping between a given CoS value
* and the PCP value is not defined (in future versions)
*/
leaf default-pcp {
type uint8 {
range "0..7";
}
description
"The default Priority Code Point (PCP) value to push/swap";
}
}
grouping vlan-operations {
description
"A grouping which represents VLAN operations.";
leaf pop-tags {
type uint8 {
range "1..2";
}
description
Zheng, et al. Expires 1 August 2024 [Page 24]
Internet-Draft Client Signals YANG Model January 2024
"The number of VLAN tags to pop (or swap if used in
conjunction with push-tags)";
}
container push-tags {
description
"The VLAN tags to push (or swap if used in
conjunction with pop-tags)";
container outer-tag {
presence
"Indicates existence of the outermost VLAN tag to
push/swap";
description
"The outermost VLAN tag to push/swap.";
uses vlan-write;
}
container second-tag {
must
'../outer-tag/tag-type = "etht-types:s-vlan-tag-type" and ' +
'tag-type = "etht-types:c-vlan-tag-type"'
{
error-message
"
When pushing/swapping two tags, the outermost tag must
be specified and of S-VLAN type and the second
outermost tag must be of C-VLAN tag type.
";
description
"
For IEEE 802.1Q interoperability, when pushing/swapping
two tags, it is required that the outermost tag exists
and is an S-VLAN, and the second outermost tag is a
C-VLAN.
";
}
presence
"Indicates existence of a second outermost VLAN tag to
push/swap";
description
"The second outermost VLAN tag to push/swap.";
uses vlan-write;
}
}
}
grouping named-or-value-bandwidth-profile {
description
"A grouping to configure a bandwdith profile either by
referencing a named bandwidth profile or by
Zheng, et al. Expires 1 August 2024 [Page 25]
Internet-Draft Client Signals YANG Model January 2024
configuring the values of the bandwidth profile attributes.";
choice style {
description
"Whether the bandwidth profile is named or defined by value";
case named {
description
"Named bandwidth profile.";
leaf bandwidth-profile-name {
type leafref {
path "/etht-svc:etht-svc/etht-svc:globals/"
+ "etht-svc:named-bandwidth-profiles/"
+ "etht-svc:bandwidth-profile-name";
}
description
"Name of the bandwidth profile.";
}
}
case value {
description
"Bandwidth profile configured by value.";
uses etht-types:etht-bandwidth-profiles;
}
}
}
grouping bandwidth-profiles {
description
"A grouping which represent bandwidth profile configuration.";
choice direction {
description
"Whether the bandwidth profiles are symmetrical or
asymmetrical";
case symmetrical {
description
"The same bandwidth profile is used to describe both
the ingress and the egress bandwidth profile.";
container ingress-egress-bandwidth-profile {
description
"The bandwdith profile used in both directions.";
uses named-or-value-bandwidth-profile;
}
}
case asymmetrical {
description
"Ingress and egress bandwidth profiles can be specified.";
container ingress-bandwidth-profile {
description
Zheng, et al. Expires 1 August 2024 [Page 26]
Internet-Draft Client Signals YANG Model January 2024
"The bandwdith profile used in the ingress direction.";
uses named-or-value-bandwidth-profile;
}
container egress-bandwidth-profile {
description
"The bandwdith profile used in the egress direction.";
uses named-or-value-bandwidth-profile;
}
}
}
}
grouping etht-svc-access-parameters {
description
"ETH services access parameters";
leaf access-node-id {
type te-types:te-node-id;
description
"The identifier of the access node in
the ETH TE topology.";
}
leaf access-node-uri {
type nw:node-id;
description
"The identifier of the access node in the network.";
}
leaf access-ltp-id {
type te-types:te-tp-id;
description
"The TE link termination point identifier, used
together with access-node-id to identify the
access LTP.";
}
leaf access-ltp-uri {
type nt:tp-id;
description
"The link termination point identifier in network topology,
used together with access-node-uri to identify the
access LTP.";
}
leaf access-role {
type identityref {
base etht-types:access-role;
}
description
"Indicate the role of access, e.g., working or protection. ";
}
Zheng, et al. Expires 1 August 2024 [Page 27]
Internet-Draft Client Signals YANG Model January 2024
container pm-config {
uses pm-config-grouping;
description
"This grouping is used to set the threshold value for
performance monitoring. ";
}
container state {
config false;
description
"The state is used to monitor the status of service. ";
leaf operational-state {
type identityref {
base te-types:tunnel-state-type;
}
description
"Indicating the operational state of client signal. ";
}
leaf provisioning-state {
type identityref {
base te-types:lsp-state-type;
}
description
"Indicating the provisional state of client signal,
especially when there is a change, i.e., revise, create. ";
}
}
leaf performance {
type identityref {
base etht-types:performance;
}
config false;
description
"Performance Monitoring for the service. ";
}
}
grouping etht-svc-tunnel-parameters {
description
"ETH services tunnel parameters.";
choice technology {
description
"Service multiplexing is optional and flexible.";
case native-ethernet {
/*
placeholder to support proprietary multiplexing
(for further discussion)
*/
Zheng, et al. Expires 1 August 2024 [Page 28]
Internet-Draft Client Signals YANG Model January 2024
list eth-tunnels {
key name;
description
"ETH Tunnel list in native Ethernet scenario.";
uses tunnels-grouping;
}
}
case frame-base {
list otn-tunnels {
key name;
description
"OTN Tunnel list in Frame-based scenario.";
uses tunnels-grouping;
}
}
case mpls-tp {
container pw {
description
"Pseudowire information for Ethernet over MPLS-TP.";
uses pw-segment-grouping;
}
}
}
/*
* Open issue:
* can we constraints it to be used only with mp services?
*/
leaf src-split-horizon-group {
type string;
description
"Identify a split horizon group at the source Tunnel
Termination Point (TTP).";
}
leaf dst-split-horizon-group {
type string;
description
"Identify a split horizon group at the destination Tunnel
Termination Point (TTP).";
}
}
grouping etht-svc-pm-threshold-config {
description
"Configuraiton parameters for Ethernet service PM thresholds.";
leaf sending-rate-high {
type uint64;
description
Zheng, et al. Expires 1 August 2024 [Page 29]
Internet-Draft Client Signals YANG Model January 2024
"High threshold of packet sending rate in kbps.";
}
leaf sending-rate-low {
type uint64;
description
"Low threshold of packet sending rate in kbps.";
}
leaf receiving-rate-high {
type uint64;
description
"High threshold of packet receiving rate in kbps.";
}
leaf receiving-rate-low {
type uint64;
description
"Low threshold of packet receiving rate in kbps.";
}
}
grouping etht-svc-pm-stats {
description
"Ethernet service PM statistics.";
leaf sending-rate-too-high {
type uint32;
description
"Counter that indicates the number of times the
sending rate is above the high threshold";
}
leaf sending-rate-too-low {
type uint32;
description
"Counter that indicates the number of times the
sending rate is below the low threshold";
}
leaf receiving-rate-too-high {
type uint32;
description
"Counter that indicates the number of times the
receiving rate is above the high threshold";
}
leaf receiving-rate-too-low {
type uint32;
description
"Counter that indicates the number of times the
receiving rate is below the low threshold";
}
}
Zheng, et al. Expires 1 August 2024 [Page 30]
Internet-Draft Client Signals YANG Model January 2024
grouping etht-svc-instance-config {
description
"Configuraiton parameters for Ethernet services.";
leaf etht-svc-name {
type string;
description
"Name of the ETH service.";
}
leaf etht-svc-title {
type string;
description
"The Identifier of the ETH service.";
}
leaf user-label {
type string;
description
"Alias of the ETH service.";
}
leaf etht-svc-descr {
type string;
description
"Description of the ETH service.";
}
leaf etht-svc-customer {
type string;
description
"Customer of the ETH service.";
}
leaf etht-svc-type {
type etht-types:service-type;
description
"Type of ETH service (p2p, mp2mp or rmp).";
/* Add default as p2p */
}
leaf etht-svc-lifecycle {
type etht-types:lifecycle-status;
description
"Lifecycle state of ETH service.";
/* Add default as installed */
}
uses te-types:te-topology-identifier;
uses resilience-grouping;
list etht-svc-end-points {
key etht-svc-end-point-name;
description
"The logical end point for the ETH service. ";
uses etht-svc-end-point-grouping;
Zheng, et al. Expires 1 August 2024 [Page 31]
Internet-Draft Client Signals YANG Model January 2024
}
container alarm-threshold {
description
"threshold configuration for the E2E client signal";
uses alarm-threshold-grouping;
}
container underlay {
description
"The unterlay tunnel information that carrying the
ETH service. ";
uses etht-svc-tunnel-parameters;
}
leaf admin-status {
type identityref {
base te-types:tunnel-admin-state-type;
}
default te-types:tunnel-admin-state-up;
description "ETH service administrative state.";
}
}
grouping etht-svc-instance-state {
description
"State parameters for Ethernet services.";
leaf operational-state {
type identityref {
base te-types:tunnel-state-type;
}
default te-types:tunnel-state-up;
description
"ETH service operational state.";
}
leaf provisioning-state {
type identityref {
base te-types:lsp-state-type;
}
description
"ETH service provisioning state.";
}
leaf creation-time {
type yang:date-and-time;
description
"Time of ETH service creation.";
}
leaf last-updated-time {
type yang:date-and-time;
description
Zheng, et al. Expires 1 August 2024 [Page 32]
Internet-Draft Client Signals YANG Model January 2024
"Time of ETH service last update.";
}
leaf created-by {
type string;
description
"The client signal is created by whom,
can be a system or staff ID.";
}
leaf last-updated-by {
type string;
description
"The client signal is last updated by whom,
can be a system or staff ID.";
}
leaf owned-by {
type string;
description
"The client signal is last updated by whom,
can be a system ID.";
}
container pm-state {
description
"PM data of E2E Ethernet service";
uses pm-state-grouping;
}
container error-info {
description "error messages of configuration";
uses error-info-grouping;
}
}
grouping pm-state-grouping {
description
"Performance Monitoring (PM) state attributes";
leaf latency {
type uint32;
units microsecond;
description
"latency value of the E2E Ethernet service";
}
}
grouping error-info-grouping {
description
"Error information parameters";
leaf error-code {
type uint16;
Zheng, et al. Expires 1 August 2024 [Page 33]
Internet-Draft Client Signals YANG Model January 2024
description "error code";
}
leaf error-description {
type string;
description "detail message of error";
}
leaf error-timestamp {
type yang:date-and-time;
description "the date and time error is happened";
}
}
grouping alarm-threshold-grouping {
description
"Alarm threshold parameters.";
leaf latency-threshold {
type uint32;
units microsecond;
description
"a threshold for the E2E client signal service's
latency. Once the latency value exceed this threshold,
an alarm should be triggered.";
}
}
grouping resilience-grouping {
description
"Grouping for resilience configuration. ";
container resilience {
description
"To configure the data plane protection parameters,
currently a placeholder only, future candidate attributes
include, Revert, WTR, Hold-off Timer, ...";
uses te:protection-restoration-properties;
}
}
grouping etht-svc-end-point-grouping {
description
"Grouping for the end point configuration.";
leaf etht-svc-end-point-name {
type string;
description
"The name of the logical end point of ETH service. ";
}
leaf etht-svc-end-point-id {
type string;
Zheng, et al. Expires 1 August 2024 [Page 34]
Internet-Draft Client Signals YANG Model January 2024
description
"The identifier of the logical end point of ETH service.";
}
leaf etht-svc-end-point-descr {
type string;
description
"The description of the logical end point of ETH service. ";
}
leaf topology-role {
type identityref {
base etht-types:topology-role;
}
description
"Indicating the underlay topology role,
e.g., hub,spoke, any-to-any ";
}
container resilience {
description
"Placeholder for resilience configuration, for future
study.";
}
list etht-svc-access-points {
key access-point-id;
min-elements "1";
/*
Open Issue:
Is it possible to limit the max-elements only for p2p
services?
max-elements "2";
*/
description
"List of the ETH trasport services access point instances.";
leaf access-point-id {
type string;
description
"ID of the service access point instance";
}
uses etht-svc-access-parameters;
}
leaf service-classification-type {
type identityref {
base etht-types:service-classification-type;
}
description
"Service classification type.";
}
choice service-classification {
description
Zheng, et al. Expires 1 August 2024 [Page 35]
Internet-Draft Client Signals YANG Model January 2024
"Access classification can be port-based or
VLAN based.";
case port-classification {
/* no additional information */
}
case vlan-classification {
container outer-tag {
presence "The outermost VLAN tag exists";
description
"Classifies traffic using the outermost VLAN tag.";
uses vlan-classification;
}
container second-tag {
must
'../outer-tag/tag-type = "etht-types:classify-s-vlan"' +
' and tag-type = "etht-types:classify-c-vlan"'
{
error-message
"
When matching two tags, the outermost tag must be
specified and of S-VLAN type and the second
outermost tag must be of C-VLAN tag type.
";
description
"
For IEEE 802.1Q interoperability, when matching two
tags, it is required that the outermost tag exists
and is an S-VLAN, and the second outermost tag is a
C-VLAN.
";
}
presence "The second outermost VLAN tag exists";
description
"Classifies traffic using the second outermost VLAN
tag.";
uses vlan-classification;
}
}
}
/*
* Open issue:
* can we constraints it to be used only with mp services?
*/
leaf split-horizon-group {
type string;
description "Identify a split horizon group";
}
uses bandwidth-profiles;
Zheng, et al. Expires 1 August 2024 [Page 36]
Internet-Draft Client Signals YANG Model January 2024
container vlan-operations {
description
"Configuration of VLAN operations.";
choice direction {
description
"Whether the VLAN operations are symmetrical or
asymmetrical";
case symmetrical {
container symmetrical-operation {
uses vlan-operations;
description
"Symmetrical operations.
Expressed in the ingress direction, but
the reverse operation is applied to egress traffic";
}
}
case asymmetrical {
container asymmetrical-operation {
description "Asymmetrical operations";
container ingress {
uses vlan-operations;
description "Ingress operations";
}
container egress {
uses vlan-operations;
description "Egress operations";
}
}
}
}
}
}
grouping pm-config-grouping {
description
"Grouping used for Performance Monitoring Configuration. ";
leaf pm-enable {
type boolean;
description
"Whether to enable the performance monitoring.";
}
leaf sending-rate-high {
type uint64;
description
"The upperbound of sending rate.";
}
leaf sending-rate-low {
Zheng, et al. Expires 1 August 2024 [Page 37]
Internet-Draft Client Signals YANG Model January 2024
type uint64;
description
"The lowerbound of sending rate.";
}
leaf receiving-rate-high {
type uint64;
description
"The upperbound of receiving rate.";
}
leaf receiving-rate-low {
type uint64;
description
"The lowerbound of receiving rate.";
}
}
grouping pw-segment-grouping {
description
"Grouping used for PW configuration. ";
leaf pw-id {
type string;
description
"The Identifier information of pseudowire. ";
}
leaf pw-name {
type string;
description
"The name information of pseudowire.";
}
leaf transmit-label {
type rt-types:mpls-label;
description
"Transmit label information in PW. ";
}
leaf receive-label {
type rt-types:mpls-label;
description
"Receive label information in PW. ";
}
leaf encapsulation-type {
type identityref {
base etht-types:encapsulation-type;
}
description
"The encapsulation type, raw or tag. ";
}
leaf oper-status {
Zheng, et al. Expires 1 August 2024 [Page 38]
Internet-Draft Client Signals YANG Model January 2024
type identityref {
base te-types:tunnel-state-type;
}
config false;
description
"The operational state of the PW segment. ";
}
container ingress-bandwidth-profile {
description
"Bandwidth Profile for ingress. ";
uses pw-segment-named-or-value-bandwidth-profile;
}
list pw-paths {
key path-id;
description
"A list of pw paths. ";
leaf path-id {
type uint8;
description
"The identifier of pw paths. ";
}
list tp-tunnels {
key name;
description
"Names of TP Tunnel underlay";
leaf name {
type string;
description
"Names of TP Tunnel underlay";
}
}
}
}
grouping pw-segment-named-or-value-bandwidth-profile {
description
"A grouping to configure a bandwdith profile either by
referencing a named bandwidth profile or by
configuring the values of the bandwidth profile attributes.";
choice style {
description
"Whether the bandwidth profile is named or defined by value";
case named {
description
"Named bandwidth profile.";
leaf bandwidth-profile-name {
type leafref {
Zheng, et al. Expires 1 August 2024 [Page 39]
Internet-Draft Client Signals YANG Model January 2024
path "/etht-svc:etht-svc/etht-svc:globals/"
+ "etht-svc:named-bandwidth-profiles/"
+ "etht-svc:bandwidth-profile-name";
}
description
"Name of the bandwidth profile.";
}
}
case value {
description
"Bandwidth profile configured by value.";
uses etht-types:pw-segement-bandwidth-profile-grouping;
}
}
}
grouping tunnels-grouping {
description
"A group of tunnels. ";
leaf name {
type leafref {
path "/te:te/te:tunnels/te:tunnel/te:name";
require-instance false;
}
description "Dependency tunnel name";
}
leaf encoding {
type identityref {
base te-types:lsp-encoding-types;
}
description "LSP encoding type";
reference "RFC3945";
}
leaf switching-type {
type identityref {
base te-types:switching-capabilities;
}
description "LSP switching type";
reference "RFC3945";
}
}
/*
* Data nodes
*/
container etht-svc {
description
Zheng, et al. Expires 1 August 2024 [Page 40]
Internet-Draft Client Signals YANG Model January 2024
"ETH services.";
container globals {
description
"Globals Ethernet configuration data container";
list named-bandwidth-profiles {
key bandwidth-profile-name;
description
"List of named bandwidth profiles used by
Ethernet services.";
leaf bandwidth-profile-name {
type string;
description
"Name of the bandwidth profile.";
}
uses etht-types:etht-bandwidth-profiles;
}
}
list etht-svc-instances {
key etht-svc-name;
description
"The list of p2p ETH service instances";
uses etht-svc-instance-config;
container state {
config false;
description
"Ethernet Service states.";
uses etht-svc-instance-state;
}
}
}
}
<CODE ENDS>
Figure 7
5.2. YANG Code for ETH type
This module references a few documents including [RFC2697],
[RFC2698], [RFC4115], [IEEE_802.1ad], [IEEE_802.1q] and [MEF10].
Zheng, et al. Expires 1 August 2024 [Page 41]
Internet-Draft Client Signals YANG Model January 2024
<CODE BEGINS> file "ietf-eth-tran-types@2024-01-11.yang"
module ietf-eth-tran-types {
yang-version 1.1;
namespace "urn:ietf:params:xml:ns:yang:ietf-eth-tran-types";
prefix etht-types;
organization
"Internet Engineering Task Force (IETF) CCAMP WG";
contact
"WG Web: <https://datatracker.ietf.org/wg/ccamp/>
WG List: <mailto:ccamp@ietf.org>
Editor: Haomian Zheng
<mailto:zhenghaomian@huawei.com>
Editor: Aihua Guo
<mailto:aihuaguo.ietf@gmail.com>
Editor: Italo Busi
<mailto:italo.busi@huawei.com>
Editor: Anton Snitser
<mailto:asnizar@cisco.com>
Editor: Chaode Yu
<mailto:yuchaode@huawei.com>";
description
"This module defines a collection of common YANG identity, data
type and grouping definitions for describing Ethernet transport
network clients.
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; see
the RFC itself for full legal notices.";
revision 2024-01-11 {
description
"Initial Version";
Zheng, et al. Expires 1 August 2024 [Page 42]
Internet-Draft Client Signals YANG Model January 2024
reference
"RFC XXXX: A YANG Data Model for Transport Network Client
Signals";
}
// RFC Editor: replace XXXX with the actual RFC number assigned
// to the RFC once this draft
// becomes an RFC, update date information and remove this note.
/*
* Identities
*/
identity eth-vlan-tag-type {
description
"ETH VLAN tag type.";
}
identity c-vlan-tag-type {
base eth-vlan-tag-type;
description
"802.1Q Customer VLAN";
}
identity s-vlan-tag-type {
base eth-vlan-tag-type;
description
"802.1Q Service VLAN (QinQ)";
}
identity service-classification-type {
description
"Service classification.";
}
identity port-classification {
base service-classification-type;
description
"Port classification.";
}
identity vlan-classification {
base service-classification-type;
description
"VLAN classification.";
}
identity eth-vlan-tag-classify {
description
Zheng, et al. Expires 1 August 2024 [Page 43]
Internet-Draft Client Signals YANG Model January 2024
"VLAN tag classification.";
}
identity classify-c-vlan {
base eth-vlan-tag-classify;
description
"Classify 802.1Q Customer VLAN tag.
Only C-tag type is accepted";
}
identity classify-s-vlan {
base eth-vlan-tag-classify;
description
"Classify 802.1Q Service VLAN (QinQ) tag.
Only S-tag type is accepted";
}
identity classify-s-or-c-vlan {
base eth-vlan-tag-classify;
description
"Classify S-VLAN or C-VLAN tag-classify.
Either tag is accepted";
}
identity bandwidth-profile-type {
description
"Bandwidth Profile Types";
}
identity mef-10-bwp {
base bandwidth-profile-type;
description
"MEF 10 Bandwidth Profile";
}
identity rfc-2697-bwp {
base bandwidth-profile-type;
description
"RFC 2697 Bandwidth Profile";
}
identity rfc-2698-bwp {
base bandwidth-profile-type;
description
"RFC 2698 Bandwidth Profile";
}
identity rfc-4115-bwp {
Zheng, et al. Expires 1 August 2024 [Page 44]
Internet-Draft Client Signals YANG Model January 2024
base bandwidth-profile-type;
description
"RFC 4115 Bandwidth Profile";
}
identity service-type {
description
"Type of Ethernet service.";
}
identity p2p-svc {
base service-type;
description
"Ethernet point-to-point service (EPL, EVPL).";
}
identity rmp-svc {
base service-type;
description
"Ethernet rooted-multitpoint service (E-TREE, EP-TREE).";
}
identity mp2mp-svc {
base service-type;
description
"Ethernet multipoint-to-multitpoint service
(E-LAN, EP-LAN).";
}
identity lifecycle-status {
description
"Lifecycle Status.";
}
identity installed {
base lifecycle-status;
description
"Installed.";
}
identity planned {
base lifecycle-status;
description
"Planned.";
}
identity pending-removal {
base lifecycle-status;
Zheng, et al. Expires 1 August 2024 [Page 45]
Internet-Draft Client Signals YANG Model January 2024
description
"Pending Removal.";
}
identity topology-role {
description
"The role of underlay topology: e.g., hub, spoke,
any-to-any.";
}
identity resilience {
description
"Placeholder for resilience information in data plane,
for future study. ";
}
identity access-role {
description
"Indicating whether the access is a working or protection
access.";
}
identity root-primary {
base access-role;
description
"Designates the primary root UNI of an E-Tree service, and
may also designates the UNI access role of E-LINE and E-LAN
service.";
}
identity root-backup {
base access-role;
description
"Designates the backup root UNI of an E-Tree service.";
}
identity leaf-access {
base access-role;
description
"Designates the leaf UNI of an E-Tree service.";
}
identity performance {
description
"Placeholder for performance information, for future study.";
}
identity encapsulation-type {
Zheng, et al. Expires 1 August 2024 [Page 46]
Internet-Draft Client Signals YANG Model January 2024
description
"Indicating how the service is encapsulated (to PW), e.g, raw or
tag. ";
}
/*
* Data Types
*/
typedef eth-tag-type {
type identityref {
base eth-vlan-tag-type;
}
description
"Identifies a specific ETH VLAN tag type.";
}
typedef eth-tag-classify {
type identityref {
base eth-vlan-tag-classify;
}
description
"Identifies a specific VLAN tag classification.";
}
typedef vlanid {
type uint16 {
range "1..4094";
}
description
"The 12-bit VLAN-ID used in the VLAN Tag header.";
}
typedef vid-range-type {
type string {
pattern "([1-9][0-9]{0,3}(-[1-9][0-9]{0,3})?" +
"(,[1-9][0-9]{0,3}(-[1-9][0-9]{0,3})?)*)";
}
description
"A list of VLAN Ids, or non overlapping VLAN ranges, in
ascending order, between 1 and 4094.
This type is used to match an ordered list of VLAN Ids, or
contiguous ranges of VLAN Ids. Valid VLAN Ids must be in the
range 1 to 4094, and included in the list in non overlapping
ascending order.
For example: 1,10-100,50,500-1000";
}
Zheng, et al. Expires 1 August 2024 [Page 47]
Internet-Draft Client Signals YANG Model January 2024
typedef bandwidth-profile-type {
type identityref {
base bandwidth-profile-type;
}
description
"Identifies a specific Bandwidth Profile type.";
}
typedef service-type {
type identityref {
base service-type;
}
description
"Identifies the type of Ethernet service.";
}
typedef lifecycle-status {
type identityref {
base lifecycle-status;
}
description
"Identifies the lLifecycle Status .";
}
/*
* Groupings
*/
grouping etht-bandwidth-profiles {
description
"Bandwidth profile configuration paramters.";
leaf bandwidth-profile-type {
type etht-types:bandwidth-profile-type;
description
"The type of bandwidth profile.";
}
leaf CIR {
type uint64;
description
"Committed Information Rate in Kbps";
}
leaf CBS {
type uint64;
description
"Committed Burst Size in in KBytes";
}
leaf EIR {
Zheng, et al. Expires 1 August 2024 [Page 48]
Internet-Draft Client Signals YANG Model January 2024
type uint64;
/* Need to indicate that EIR is not supported by RFC 2697
must
'../bw-profile-type = "mef-10-bwp" or ' +
'../bw-profile-type = "rfc-2698-bwp" or ' +
'../bw-profile-type = "rfc-4115-bwp"'
must
'../bw-profile-type != "rfc-2697-bwp"'
*/
description
"Excess Information Rate in Kbps
In case of RFC 2698, PIR = CIR + EIR";
}
leaf EBS {
type uint64;
description
"Excess Burst Size in KBytes.
In case of RFC 2698, PBS = CBS + EBS";
}
leaf color-aware {
type boolean;
description
"Indicates weather the color-mode is
color-aware or color-blind.";
}
leaf coupling-flag {
type boolean;
/* Need to indicate that Coupling Flag is defined only for
MEF 10
must
'../bw-profile-type = "mef-10-bwp"'
*/
description
"Coupling Flag.";
}
}
grouping pw-segement-bandwidth-profile-grouping {
description
"bandwidth profile grouping for PW segment.";
leaf bandwidth-profile-type {
type etht-types:bandwidth-profile-type;
description
"The type of bandwidth profile.";
Zheng, et al. Expires 1 August 2024 [Page 49]
Internet-Draft Client Signals YANG Model January 2024
}
leaf CIR {
type uint64;
description
"Committed Information Rate in Kbps";
}
leaf CBS {
type uint64;
description
"Committed Burst Size in in KBytes";
}
leaf EIR {
type uint64;
/* Need to indicate that EIR is not supported by RFC 2697
must
'../bw-profile-type = "mef-10-bwp" or ' +
'../bw-profile-type = "rfc-2698-bwp" or ' +
'../bw-profile-type = "rfc-4115-bwp"'
must
'../bw-profile-type != "rfc-2697-bwp"'
*/
description
"Excess Information Rate in Kbps
In case of RFC 2698, PIR = CIR + EIR";
}
leaf EBS {
type uint64;
description
"Excess Burst Size in KBytes.
In case of RFC 2698, PBS = CBS + EBS";
}
}
grouping eth-bandwidth {
description
"Available bandwith for ethernet.";
leaf eth-bandwidth {
type uint64{
range "0..10000000000";
}
units "Kbps";
description
"Available bandwith value expressed in kilobits per second";
}
}
Zheng, et al. Expires 1 August 2024 [Page 50]
Internet-Draft Client Signals YANG Model January 2024
grouping eth-label-restriction {
description
"Label Restriction for ethernet.";
leaf tag-type {
type etht-types:eth-tag-type;
description "VLAN tag type.";
}
leaf priority {
type uint8;
description "priority.";
}
}
grouping eth-label {
description
"Label for ethernet.";
leaf vlanid {
type etht-types:vlanid;
description
"VLAN tag id.";
}
}
grouping eth-label-step {
description "Label step for Ethernet VLAN";
leaf eth-step {
type uint16 {
range "1..4095";
}
default 1;
description
"Label step which represent possible increments for
an Ethernet VLAN tag.";
reference
"IEEE 802.1ad: Provider Bridges.";
}
}
}
<CODE ENDS>
Figure 8
5.3. Other Client Signal YANG Code
This module imports typedefs and modules from [RFC6991],
[I-D.ietf-ccamp-otn-tunnel-model], [I-D.ietf-teas-rfc8776-update].
Zheng, et al. Expires 1 August 2024 [Page 51]
Internet-Draft Client Signals YANG Model January 2024
<CODE BEGINS> file "ietf-trans-client-service@2024-01-11.yang"
module ietf-trans-client-service {
yang-version 1.1;
namespace
"urn:ietf:params:xml:ns:yang:ietf-trans-client-service";
prefix clnt-svc;
import ietf-yang-types {
prefix yang;
reference "RFC 6991: Common YANG Data Types";
}
import ietf-te-types {
prefix te-types;
reference "RFCYYYY: Traffic Engineering Common YANG Types";
}
// RFC Editor: replace YYYY with the actual RFC number assigned
// to the RFC once draft-ietf-teas-rfc8776-update
// becomes an RFC, update date information and remove this note.
import ietf-layer1-types {
prefix l1-types;
reference "RFCZZZZ: A YANG Data Model for Layer 1 Types";
}
// RFC Editor: replace ZZZZ with the actual RFC number assigned
// to the RFC once draft-ietf-ccamp-layer1-types
// becomes an RFC, update date information and remove this note.
import ietf-network {
prefix nw;
reference "RFC8345: A YANG Data Model for Network Topologies";
}
import ietf-network-topology {
prefix nt;
reference "RFC8345: A YANG Data Model for Network Topologies";
}
import ietf-trans-client-svc-types {
prefix clnt-types;
reference
"RFCXXXX: A YANG Data Model for Transport Network Client
Signals";
}
// RFC Editor: replace XXXX with the actual RFC number assigned
// to the RFC once this draft
// becomes an RFC, update date information and remove this note.
Zheng, et al. Expires 1 August 2024 [Page 52]
Internet-Draft Client Signals YANG Model January 2024
organization
"Internet Engineering Task Force (IETF) CCAMP WG";
contact
"WG Web: <https://datatracker.ietf.org/wg/ccamp/>
WG List: <mailto:ccamp@ietf.org>
Editor: Haomian Zheng
<mailto:zhenghaomian@huawei.com>
Editor: Aihua Guo
<mailto:aihuaguo.ietf@gmail.com>
Editor: Italo Busi
<mailto:italo.busi@huawei.com>
Editor: Anton Snitser
<mailto:asnizar@cisco.com>
Editor: Chaode Yu
<mailto:yuchaode@huawei.com>";
description
"This module defines a YANG data model for describing
transport network client services.
The model fully conforms to the Network Management
Datastore Architecture (NMDA).
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; see
the RFC itself for full legal notices.";
revision 2024-01-11 {
description
"Initial Version";
reference
"RFC XXXX: A YANG Data Model for Transport Network Client
Signals";
}
Zheng, et al. Expires 1 August 2024 [Page 53]
Internet-Draft Client Signals YANG Model January 2024
// RFC Editor: replace XXXX with the actual RFC number assigned
// to the RFC once this draft
// becomes an RFC, update date information and remove this note.
/*
* Groupings
*/
grouping client-svc-access-parameters {
description
"Transport network client signals access parameters";
leaf access-node-id {
type te-types:te-node-id;
description
"The identifier of the access node in the TE topology.";
}
leaf access-node-uri {
type nw:node-id;
description
"The identifier of the access node in the network.";
}
leaf access-ltp-id {
type te-types:te-tp-id;
description
"The TE link termination point identifier in TE topology,
used together with access-node-id to identify the access
Link Termination Point (LTP).";
}
leaf access-ltp-uri {
type nt:tp-id;
description
"The link termination point identifier in network topology,
used together with access-node-uri to identify the access
LTP";
}
leaf client-signal {
type identityref {
base l1-types:client-signal;
}
description
"Identify the client signal type associated with this port";
}
}
grouping pm-state-grouping {
description
"Performance Monitoring (PM) state attributes";
Zheng, et al. Expires 1 August 2024 [Page 54]
Internet-Draft Client Signals YANG Model January 2024
leaf latency {
type uint32;
units microsecond;
description
"latency value of the E2E client signal service";
}
}
grouping error-info-grouping {
description
"Error information parameters";
leaf error-code {
type uint16;
description "error code";
}
leaf error-description {
type string;
description "detail message of error";
}
leaf error-timestamp {
type yang:date-and-time;
description "the date and time error is happened";
}
}
grouping alarm-threshold-grouping {
description
"Alarm threshold parameters.";
leaf latency-threshold {
type uint32;
units microsecond;
description
"a threshold for the E2E client signal service's
latency. Once the latency value exceed this threshold,
an alarm should be triggered.";
}
}
grouping client-svc-tunnel-parameters {
description
"Transport network client signals tunnel parameters";
leaf tunnel-name {
type string;
description
"TE tunnel instance name.";
}
}
Zheng, et al. Expires 1 August 2024 [Page 55]
Internet-Draft Client Signals YANG Model January 2024
grouping client-svc-instance-config {
description
"Configuration parameters for client services.";
leaf client-svc-name {
type string;
description
"Identifier of the p2p transport network client signals.";
}
leaf client-svc-title {
type string;
description
"Name of the p2p transport network client signals.";
}
leaf user-label {
type string;
description
"Alias of the p2p transport network client signals.";
}
leaf client-svc-descr {
type string;
description
"Description of the transport network client signals.";
}
leaf client-svc-customer {
type string;
description
"Customer of the transport network client signals.";
}
container resilience {
description "Place holder for resilience functionalities";
}
uses te-types:te-topology-identifier;
leaf admin-status {
type identityref {
base te-types:tunnel-admin-state-type;
}
default te-types:tunnel-admin-state-up;
description "Client signals administrative state.";
}
container src-access-ports {
description
"Source access port of a client signal.";
uses client-svc-access-parameters;
}
container dst-access-ports {
description
"Destination access port of a client signal.";
Zheng, et al. Expires 1 August 2024 [Page 56]
Internet-Draft Client Signals YANG Model January 2024
uses client-svc-access-parameters;
}
container pm-state {
config false;
description "PM data of E2E client signal";
uses pm-state-grouping;
}
container error-info {
config false;
description "error messages of configuration";
uses error-info-grouping;
}
container alarm-threshold {
description
"threshold configuration for the E2E client signal";
uses alarm-threshold-grouping;
}
leaf direction {
type identityref {
base clnt-types:direction;
}
description "Uni-dir or Bi-dir for the client signal.";
}
list svc-tunnels {
key tunnel-name;
description
"List of the TE Tunnels supporting the client signal.";
uses client-svc-tunnel-parameters;
}
}
grouping client-svc-instance-state {
description
"State parameters for client services.";
leaf operational-state {
type identityref {
base te-types:tunnel-state-type;
}
config false;
description "Client signal operational state.";
}
leaf provisioning-state {
type identityref {
base te-types:lsp-state-type;
}
config false;
description "Client signal provisioning state.";
}
Zheng, et al. Expires 1 August 2024 [Page 57]
Internet-Draft Client Signals YANG Model January 2024
leaf creation-time {
type yang:date-and-time;
config false;
description "The time of the client signal be created.";
}
leaf last-updated-time {
type yang:date-and-time;
config false;
description "The time of the client signal's latest update.";
}
leaf created-by {
type string;
config false;
description
"The client signal is created by whom,
can be a system or staff ID.";
}
leaf last-updated-by {
type string;
config false;
description
"The client signal is last updated by whom,
can be a system or staff ID.";
}
leaf owned-by {
type string;
config false;
description
"The client signal is owned by whom,
can be a system ID.";
}
}
/*
* Data nodes
*/
container client-svc {
description
"Transport client services.";
list client-svc-instances {
key client-svc-name;
description
"The list of p2p transport client service instances";
uses client-svc-instance-config;
uses client-svc-instance-state;
}
Zheng, et al. Expires 1 August 2024 [Page 58]
Internet-Draft Client Signals YANG Model January 2024
}
}
<CODE ENDS>
Figure 9
5.4. Other Client Signal Types YANG Code
This module defines the types for other client signal types.
<CODE BEGINS> file "ietf-trans-client-svc-types@2024-01-11.yang"
module ietf-trans-client-svc-types {
yang-version 1.1;
namespace
"urn:ietf:params:xml:ns:yang:ietf-trans-client-svc-types";
prefix clnt-types;
organization
"Internet Engineering Task Force (IETF) CCAMP WG";
contact
"WG Web: <https://datatracker.ietf.org/wg/ccamp/>
WG List: <mailto:ccamp@ietf.org>
Editor: Haomian Zheng
<mailto:zhenghaomian@huawei.com>
Editor: Aihua Guo
<mailto:aihuaguo.ietf@gmail.com>
Editor: Italo Busi
<mailto:italo.busi@huawei.com>
Editor: Anton Snitser
<mailto:asnizar@cisco.com>
Editor: Chaode Yu
<mailto:yuchaode@huawei.com>";
description
"This module defines a collection of common YANG identity
definitions for describing Costant Bit Rate (CBR) transport
network clients.
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
Zheng, et al. Expires 1 August 2024 [Page 59]
Internet-Draft Client Signals YANG Model January 2024
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; see
the RFC itself for full legal notices.";
revision 2024-01-11 {
description
"Initial Version";
reference
"RFC XXXX: A YANG Data Model for Transport Network Client
Signals";
}
// RFC Editor: replace XXXX with the actual RFC number assigned
// to the RFC once this draft
// becomes an RFC, update date information and remove this note.
/*
* Identities
*/
identity direction {
description
"Direction information of Client Signal.";
}
identity bidirectional {
base direction;
description
"Client Signal is bi-directional.";
}
identity unidirectional {
base direction;
description
"Client Signal is uni-directional.";
}
}
<CODE ENDS>
Figure 10
6. Implementation Status
[Note to the RFC Editor - remove this section before publication, as
well as remove the reference to RFC [RFC7942].]
Zheng, et al. Expires 1 August 2024 [Page 60]
Internet-Draft Client Signals YANG Model January 2024
This section records the status of known implementations of the
protocol defined by this specification at the time of posting of this
Internet-Draft, and is based on a proposal described in [RFC7942].
The description of implementations in this section is intended to
assist the IETF in its decision processes in progressing drafts to
RFCs. Please note that the listing of any individual implementation
here does not imply endorsement by the IETF. Furthermore, no effort
has been spent to verify the information presented here that was
supplied by IETF contributors. This is not intended as, and must not
be construed to be, a catalog of available implementations or their
features. Readers are advised to note that other implementations may
exist.
According to [RFC7942], "this will allow reviewers and working groups
to assign due consideration to documents that have the benefit of
running code, which may serve as evidence of valuable experimentation
and feedback that have made the implemented protocols more mature.
It is up to the individual working groups to use this information as
they see fit".
6.1. Usage of the ETH Service YANG Model on ONAP
The implementation of the CCVPN (Cross Domain and Cross Layer VPN)
use-case on ONAP follows the ACTN [RFC8453] architecture. In the
design of CCVPN, ONAP presumes the responsibility of the MDSC, and
third party network domain controllers the PNCs. Consequently, the
ETH Service YANG model is used as the MPI between ONAP and the domain
controllers.
* Organization: China Mobile, Huawei Technologies, etc.
* Implementation: ONAP CCVPN uses the ETH Service YANG model as the
ACTN MPI
* Description: ONAP CCVPN realizes the E-LINE and E-TREE service on
a multi-domain network. Both of the services are modeled on ONAP
by the ETH Service YANG model, and the model instances (e.g., JSON
objects) are sent between ONAP and the domain controllers. Refer
to the following CCVPN wiki for more information:
https://wiki.onap.org/display/DW/
CCVPN%28Cross+Domain+and+Cross+Layer+VPN%29+USE+CASE
* Maturity Level: Prototype
* Coverage: Partial
* Contact: henry.yu1@huawei.com
Zheng, et al. Expires 1 August 2024 [Page 61]
Internet-Draft Client Signals YANG Model January 2024
7. Manageability Considerations
TBD
8. Security Considerations
The data following the model defined in this document is exchanged
via, for example, the interface between an orchestrator and a network
domain controller.
The YANG module defined in this document can be accessed via the
RESTCONF protocol defined in [RFC8040], or maybe via the NETCONF
protocol [RFC6241].
There are a number of data nodes defined in the YANG module which 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., POST) to these
data nodes without proper protection can have a negative effect on
network operations.
9. IANA Considerations
It is proposed that IANA should assign new URIs from the "IETF XML
Registry" [RFC3688] as follows:
URI: urn:ietf:params:xml:ns:yang:ietf-eth-tran-service
Registrant Contact: The IESG
XML: N/A; the requested URI is an XML namespace.
URI: urn:ietf:params:xml:ns:yang:ietf-trans-client-service
Registrant Contact: The IESG
XML: N/A; the requested URI is an XML namespace.
URI: urn:ietf:params:xml:ns:yang:ietf-eth-tran-types
Registrant Contact: The IESG
XML: N/A; the requested URI is an XML namespace.
URI: urn:ietf:params:xml:ns:yang:ietf-trans-client-svc-types
Registrant Contact: The IESG
XML: N/A; the requested URI is an XML namespace.
This document registers following YANG modules in the YANG Module
Names registry [RFC6020].
Zheng, et al. Expires 1 August 2024 [Page 62]
Internet-Draft Client Signals YANG Model January 2024
name: ietf-eth-tran-service
namespace: urn:ietf:params:xml:ns:yang:ietf-eth-tran-service
prefix: ethtsvc
reference: RFC XXXX: A YANG Data Model for Transport
Network Client Signals
name: ietf-eth-tran-types
namespace: urn:ietf:params:xml:ns:yang:ietf-eth-tran-types
prefix: etht-types
reference: RFC XXXX: A YANG Data Model for Transport
Network Client Signals
name: ietf-trans-client-service
namespace: urn:ietf:params:xml:ns:yang:ietf-trans-client-service
prefix: clntsvc
reference: RFC XXXX: A YANG Data Model for Transport
Network Client Signals
name: ietf-trans-client-svc-types
namespace: urn:ietf:params:xml:ns:yang:ietf-trans-client-svc-types
prefix: clntsvc-types
reference: RFC XXXX: A YANG Data Model for Transport
Network Client Signals
10. References
10.1. Normative References
[I-D.ietf-ccamp-l1csm-yang]
Lee, Y., Lee, K., Zheng, H., de Dios, O. G., and D.
Ceccarelli, "A YANG Data Model for L1 Connectivity Service
Model (L1CSM)", Work in Progress, Internet-Draft, draft-
ietf-ccamp-l1csm-yang-24, 11 January 2024,
<https://datatracker.ietf.org/doc/html/draft-ietf-ccamp-
l1csm-yang-24>.
[I-D.ietf-ccamp-layer1-types]
Zheng, H. and I. Busi, "A YANG Data Model for Layer 1
Types", Work in Progress, Internet-Draft, draft-ietf-
ccamp-layer1-types-16, 10 July 2023,
<https://datatracker.ietf.org/doc/html/draft-ietf-ccamp-
layer1-types-16>.
Zheng, et al. Expires 1 August 2024 [Page 63]
Internet-Draft Client Signals YANG Model January 2024
[I-D.ietf-ccamp-otn-topo-yang]
Zheng, H., Busi, I., Liu, X., Belotti, S., and O. G. de
Dios, "A YANG Data Model for Optical Transport Network
Topology", Work in Progress, Internet-Draft, draft-ietf-
ccamp-otn-topo-yang-17, 10 July 2023,
<https://datatracker.ietf.org/doc/html/draft-ietf-ccamp-
otn-topo-yang-17>.
[I-D.ietf-ccamp-otn-tunnel-model]
Zheng, H., Busi, I., Belotti, S., Lopez, V., and Y. Xu,
"OTN Tunnel YANG Model", Work in Progress, Internet-Draft,
draft-ietf-ccamp-otn-tunnel-model-20, 24 November 2023,
<https://datatracker.ietf.org/doc/html/draft-ietf-ccamp-
otn-tunnel-model-20>.
[I-D.ietf-teas-rfc8776-update]
Busi, I., Guo, A., Liu, X., Saad, T., and I. Bryskin,
"Common YANG Data Types for Traffic Engineering", Work in
Progress, Internet-Draft, draft-ietf-teas-rfc8776-update-
07, 15 September 2023,
<https://datatracker.ietf.org/doc/html/draft-ietf-teas-
rfc8776-update-07>.
[I-D.ietf-teas-yang-te]
Saad, T., Gandhi, R., Liu, X., Beeram, V. P., and I.
Bryskin, "A YANG Data Model for Traffic Engineering
Tunnels, Label Switched Paths and Interfaces", Work in
Progress, Internet-Draft, draft-ietf-teas-yang-te-35, 12
January 2024, <https://datatracker.ietf.org/doc/html/
draft-ietf-teas-yang-te-35>.
[ITU-T_G.875]
International Telecommunication Union, "Optical transport
network: Protocol-neutral management information model for
the network element view", ITU-T G.875 , June 2020.
[RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for
the Network Configuration Protocol (NETCONF)", RFC 6020,
DOI 10.17487/RFC6020, October 2010,
<https://www.rfc-editor.org/rfc/rfc6020>.
[RFC6241] Enns, R., Ed., Bjorklund, M., Ed., Schoenwaelder, J., Ed.,
and A. Bierman, Ed., "Network Configuration Protocol
(NETCONF)", RFC 6241, DOI 10.17487/RFC6241, June 2011,
<https://www.rfc-editor.org/rfc/rfc6241>.
Zheng, et al. Expires 1 August 2024 [Page 64]
Internet-Draft Client Signals YANG Model January 2024
[RFC6991] Schoenwaelder, J., Ed., "Common YANG Data Types",
RFC 6991, DOI 10.17487/RFC6991, July 2013,
<https://www.rfc-editor.org/rfc/rfc6991>.
[RFC7139] Zhang, F., Ed., Zhang, G., Belotti, S., Ceccarelli, D.,
and K. Pithewan, "GMPLS Signaling Extensions for Control
of Evolving G.709 Optical Transport Networks", RFC 7139,
DOI 10.17487/RFC7139, March 2014,
<https://www.rfc-editor.org/rfc/rfc7139>.
[RFC7950] Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language",
RFC 7950, DOI 10.17487/RFC7950, August 2016,
<https://www.rfc-editor.org/rfc/rfc7950>.
[RFC8040] Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF
Protocol", RFC 8040, DOI 10.17487/RFC8040, January 2017,
<https://www.rfc-editor.org/rfc/rfc8040>.
[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/rfc/rfc8294>.
[RFC8345] Clemm, A., Medved, J., Varga, R., Bahadur, N.,
Ananthakrishnan, H., and X. Liu, "A YANG Data Model for
Network Topologies", RFC 8345, DOI 10.17487/RFC8345, March
2018, <https://www.rfc-editor.org/rfc/rfc8345>.
10.2. Informative References
[IEEE_802.1ad]
Institute of Electrical and Electronics Engineers, "IEEE
Standard for Local and Metropolitan Area Networks -
Virtual Bridged Local Area Networks - Amendment 4:
Provider Bridges", IEEE 802.1ad-2005 , December 2005.
[IEEE_802.1q]
"IEEE Standard for Local and Metropolitan Area Networks -
Bridges and Bridged Networks", IEEE 802.1Q-2022 , December
2022.
[MEF10] MEF Forum, "Ethernet Services Attributes Phase 1", MEF
10 , November 2004,
<https://www.mef.net/Assets/Technical_Specifications/PDF/
MEF_10.pdf>.
Zheng, et al. Expires 1 August 2024 [Page 65]
Internet-Draft Client Signals YANG Model January 2024
[RFC2697] Heinanen, J. and R. Guerin, "A Single Rate Three Color
Marker", RFC 2697, DOI 10.17487/RFC2697, September 1999,
<https://www.rfc-editor.org/rfc/rfc2697>.
[RFC2698] Heinanen, J. and R. Guerin, "A Two Rate Three Color
Marker", RFC 2698, DOI 10.17487/RFC2698, September 1999,
<https://www.rfc-editor.org/rfc/rfc2698>.
[RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
DOI 10.17487/RFC3688, January 2004,
<https://www.rfc-editor.org/rfc/rfc3688>.
[RFC4115] Aboul-Magd, O. and S. Rabie, "A Differentiated Service
Two-Rate, Three-Color Marker with Efficient Handling of
in-Profile Traffic", RFC 4115, DOI 10.17487/RFC4115, July
2005, <https://www.rfc-editor.org/rfc/rfc4115>.
[RFC7942] Sheffer, Y. and A. Farrel, "Improving Awareness of Running
Code: The Implementation Status Section", BCP 205,
RFC 7942, DOI 10.17487/RFC7942, July 2016,
<https://www.rfc-editor.org/rfc/rfc7942>.
[RFC8299] Wu, Q., Ed., Litkowski, S., Tomotaki, L., and K. Ogaki,
"YANG Data Model for L3VPN Service Delivery", RFC 8299,
DOI 10.17487/RFC8299, January 2018,
<https://www.rfc-editor.org/rfc/rfc8299>.
[RFC8309] Wu, Q., Liu, W., and A. Farrel, "Service Models
Explained", RFC 8309, DOI 10.17487/RFC8309, January 2018,
<https://www.rfc-editor.org/rfc/rfc8309>.
[RFC8340] Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams",
BCP 215, RFC 8340, DOI 10.17487/RFC8340, March 2018,
<https://www.rfc-editor.org/rfc/rfc8340>.
[RFC8342] Bjorklund, M., Schoenwaelder, J., Shafer, P., Watsen, K.,
and R. Wilton, "Network Management Datastore Architecture
(NMDA)", RFC 8342, DOI 10.17487/RFC8342, March 2018,
<https://www.rfc-editor.org/rfc/rfc8342>.
[RFC8453] Ceccarelli, D., Ed. and Y. Lee, Ed., "Framework for
Abstraction and Control of TE Networks (ACTN)", RFC 8453,
DOI 10.17487/RFC8453, August 2018,
<https://www.rfc-editor.org/rfc/rfc8453>.
Zheng, et al. Expires 1 August 2024 [Page 66]
Internet-Draft Client Signals YANG Model January 2024
[RFC8466] Wen, B., Fioccola, G., Ed., Xie, C., and L. Jalil, "A YANG
Data Model for Layer 2 Virtual Private Network (L2VPN)
Service Delivery", RFC 8466, DOI 10.17487/RFC8466, October
2018, <https://www.rfc-editor.org/rfc/rfc8466>.
Acknowledgments
We would like to acknowledge the contribution from Francesco Lazzeri
to the initial versions of this document, before it has been adopted
by CCAMP WG.
We would like to thank Igor Bryskin and Daniel King for their
comments and discussions.
Contributors
Yunbin Xu
CAICT
Email: xuyunbin@caict.ac.cn
Yang Zhao
China Mobile
Email: zhaoyangyjy@chinamobile.com
Xufeng Liu
Alef Edge
Email: xufeng.liu.ietf@gmail.com
Yanlei Zheng
China Unicom
Email: zhengyanlei@chinaunicom.cn
Giuseppe Fioccola
Huawei Technologies
Email: giuseppe.fioccola@huawei.com
Zhe Liu
Huawei Technologies
Email: liuzhe123@huawei.com
Sergio Belotti
Nokia
Zheng, et al. Expires 1 August 2024 [Page 67]
Internet-Draft Client Signals YANG Model January 2024
Email: sergio.belotti@nokia.com
Yingxi Yao
Shanghai Bell
Email: yingxi.yao@nokia-sbell.com
Henry Yu
Huawei Technologies
Email: henry.yu1@huawei.com
Authors' Addresses
Haomian Zheng
Huawei Technologies
H1 XiliuBeipo Village, Songshan Lake
Dongguan
Guangdong,
China
Email: zhenghaomian@huawei.com
Aihua Guo
Futurewei
Email: aihuaguo.ietf@gmail.com
Italo Busi
Huawei Technologies
Email: italo.busi@huawei.com
Anton Snitser
Cisco
Email: asnizar@cisco.com
Chaode Yu
Huawei Technologies
Email: yuchaode@huawei.com
Zheng, et al. Expires 1 August 2024 [Page 68]
