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CCAMP Working Group H. Zheng
Internet-Draft Huawei Technologies
Intended status: Standards Track Y. Lee
Expires: April 19, 2021 Samsung
A. Guo
Futurewei
V. Lopez
Telefonica
D. King
University of Lancaster
October 16, 2020
A YANG Data Model for Layer 0 Types
draft-ietf-ccamp-layer0-types-08
Abstract
This document defines a collection of common data types and groupings
in the YANG data modeling language. These derived common types and
groupings are intended to be imported by modules that model Layer 0
optical Traffic Engineering (TE) configuration and state capabilities
such as Wavelength Switched Optical Networks (WSONs) and Flexi-grid
Dense Wavelength Division Multiplexing (DWDM) Networks.
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 April 19, 2021.
Copyright Notice
Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved.
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This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Terminology and Notations . . . . . . . . . . . . . . . . 3
1.2. Prefix in Data Node Names . . . . . . . . . . . . . . . . 3
2. Layer 0 Types Module Contents . . . . . . . . . . . . . . . . 3
3. YANG Code for Layer 0 Types . . . . . . . . . . . . . . . . . 5
4. Security Considerations . . . . . . . . . . . . . . . . . . . 17
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 17
6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 18
7. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 18
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 18
8.1. Normative References . . . . . . . . . . . . . . . . . . 18
8.2. Informative References . . . . . . . . . . . . . . . . . 19
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 21
1. Introduction
YANG [RFC7950] is a data modeling language used to model
configuration data, state data, Remote Procedure Calls, and
notifications for network management protocols such as NETCONF
[RFC6241]. The YANG language supports a small set of built-in data
types and provides mechanisms to derive other types from the built-in
types.
This document introduces a collection of common data types derived
from the built-in YANG data types. The derived types and groupings
are designed to be the common types applicable for modeling Traffic
Engineering (TE) features as well as non-TE features (e.g., physical
network configuration aspect) for Layer 0 optical networks in
model(s) defined outside of this document. The applicability of
Layer 0 types specified in this document include Wavelength Switched
Optical Networks (WSONs) [RFC6163] and [ITU-Tg6982], and Flexi-grid
Dense Wavelength Division Multiplexing (DWDM) Networks [RFC7698] and
[ITU-Tg6941] .
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1.1. Terminology and Notations
Refer to [RFC7446] and [RFC7581] for the key terms used in this
document, and the terminology for describing YANG data models can be
found in [RFC7950].
The YANG data model in this document conforms to the Network
Management Datastore Architecture defined in [RFC8342].
1.2. Prefix in Data Node 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.
+-------------+---------------------------+----------------------+
| Prefix | YANG module | Reference |
+-------------+---------------------------+----------------------+
| l0-types | ietf-layer0-types | [RFCXXXX] |
+-------------+---------------------------+----------------------+
Note: The RFC Editor will replace XXXX with the number assigned to
the RFC once this document becomes an RFC.
YANG module ietf-layer0-types (defined in Section 3) references
[RFC6163], [RFC7205], and [RFC7698].
2. Layer 0 Types Module Contents
This document defines YANG module for common Layer 0 types, ietf-
layer0-types. This module is used for WSON and Flexi-grid DWDM
networks. The ietf-layer0-types module contains the following YANG
reusable types and groupings:
l0-grid-type:
A base YANG identity for the grid type as defined in [RFC6163] and
[RFC7698].
dwdm-ch-spc-type:
A base YANG identity for the DWDM channel spacing type as defined in
[RFC6205].
cwdm-ch-spc-type:
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A base YANG identity for the CWDM channel spacing type as defined in
[RFC6205].
wson-label-start-end:
A YANG grouping that defines the label-start or label-end to specify
WSON label range as defined in [RFC6205].
wson-label-hop:
A YANG grouping that defines the label hop for WSON as defined in
[RFC6205].
l0-label-range-info:
A YANG grouping that defines the layer 0 label range information
applicable for both WSON per priority level as defined in [RFC6205].
This grouping is used in the flexi-grid DWDM by adding more flexi-
grid-specific parameters.
wson-label-step:
A YANG grouping that defines label steps for WSON as defined in
[RFC8776].
flexi-grid-label-start-end:
A YANG grouping that defines the label-start or label-end to specify
flexi-grid label range as defined in [RFC7698].
flexi-grid-label-hop:
A YANG grouping that defines the label hop for both single channel
and multiple carriers in flexi-grid DWDM, as defined in [RFC7698].
flexi-grid-label-range-info:
A YANG grouping that defines flexi-grid label range information and
per priority level as defined in [RFC7698] and [RFC8363].
flexi-grid-label-step:
A YANG grouping that defines flexi-grid label steps as defined in
[RFC8776].
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3. YANG Code for Layer 0 Types
<CODE BEGINS>file "ietf-layer0-types@2020-10-16.yang"
module ietf-layer0-types {
yang-version 1.1;
namespace "urn:ietf:params:xml:ns:yang:ietf-layer0-types";
prefix "l0-types";
organization
"IETF CCAMP Working Group";
contact
"WG Web: <http://tools.ietf.org/wg/ccamp/>
WG List: <mailto:ccamp@ietf.org>
Editor: Haomian Zheng
<mailto:zhenghaomian@huawei.com>
Editor: Young Lee
<mailto:younglee.tx@gmail.com>
Editor: Aihua Guo
<mailto:aihuaguo.ietf@gmail.com>
Editor: Victor Lopez
<mailto:victor.lopezalvarez@telefonica.com>
Editor: Daniel King
<mailto:d.king@lancaster.ac.uk>";
description
"This module defines Optical Layer 0 types. This module
provides groupings that can be applicable to Layer 0
Fixed Optical Networks (e.g., CWDM (Coarse Wavelength
Division Multiplexing) and DWDM (Dense Wavelength Division
Multiplexing)) and Flexi-grid Optical Networks.
Copyright (c) 2020 IETF Trust and the persons identified
as authors of the code. All rights reserved.
Redistribution and use in source and binary forms, with
or without modification, is permitted pursuant to, and
subject to the license terms contained in, the Simplified
BSD License set forth in Section 4.c of the IETF Trust's
Legal Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info).
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This version of this YANG module is part of RFC XXXX; see
the RFC itself for full legal notices.";
revision "2020-10-16" {
description
"Initial Version";
reference
"RFC XXXX: A YANG Data Model for Layer 0 Types";
}
typedef dwdm-n {
type int16;
description
"The given value 'N' is used to determine the nominal
central frequency.
The nominal central frequency, 'f' is defined by:
f = 193100.000 GHz + N x channel-spacing (measured in GHz)
where 193100.000 GHz (193.100000 THz) is the ITU-T 'anchor
frequency' for transmission over the C band; and
where 'channel-spacing' is defined by the dwdm-ch-spc-type.";
reference
"RFC6205: Generalized Labels for
Lambda-Switch-Capable (LSC) Label Switching Routers,
ITU-T G.694.1 (02/2012): Spectral grids for WDM applications:
DWDM frequency grid";
}
typedef cwdm-n {
type int16;
description
"The given value 'N' is used to determine the nominal
central wavelength.
The nominal central wavelength is defined by:
Wavelength = 1471 nm + N x channel-spacing (measured in nm)
where 1471 nm is the ITU-T 'anchor wavelength' for
transmission over the C band; and
where 'channel-spacing' is defined by the cwdm-ch-spc-type.";
reference
"RFC6205: Generalized Labels for
Lambda-Switch-Capable (LSC) Label Switching Routers,
ITU-T G.694.2 (12/2003): Spectral grids for WDM applications:
CWDM wavelength grid";
}
typedef flexi-n {
type int16;
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description
"The given value 'N' is used to determine the nominal
central frequency.
The nominal central frequency, 'f' is defined by,
f = 193100.000 GHz + N x channel-spacing (measured in GHz),
where 193100.000 GHz (193.100000 THz) is the ITU-T 'anchor
frequency' for transmission over the C band; and
where 'channel-spacing' is defined by the flexi-ch-spc-type.
Note that the term 'channel-spacing' can be alternated by the
term 'nominal central frequency granularity' defined in
clause 7 of ITU-T G.694.1.";
reference
"RFC7698: Framework and Requirements for GMPLS-Based Control
of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
Networks.
ITU-T G.694.1 (02/2012): Spectral grids for WDM applications:
DWDM frequency grid";
}
typedef flexi-m {
type uint16;
description
"The given value 'M' is used to determine the slot width.
A slot width is defined by:
slot width = M x SWG (measured in GHz),
where SWG is defined by the flexi-slot-width-granularity.";
reference
"RFC7698: Framework and Requirements for GMPLS-Based Control
of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
Networks.
ITU-T G.694.1 (02/2012): Spectral grids for WDM applications:
DWDM frequency grid";
}
identity l0-grid-type {
description
"Layer 0 grid type";
reference
"RFC6163:Framework for GMPLS and Path Computation Element
(PCE) Control of Wavelength Switched Optical Networks (WSONs),
ITU-T G.694.1 (02/2012): Spectral grids for WDM applications:
DWDM frequency grid,
ITU-T G.694.2 (12/2003): Spectral grids for WDM applications:
CWDM wavelength grid";
}
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identity flexi-grid-dwdm {
base l0-grid-type;
description
"Flexi-grid";
reference
"RFC7698: Framework and Requirements for GMPLS-Based Control
of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
Networks,
ITU-T G.694.1 (02/2012): Spectral grids for WDM applications:
DWDM frequency grid";
}
identity wson-grid-dwdm {
base l0-grid-type;
description
"DWDM grid";
reference
"RFC6163:Framework for GMPLS and Path Computation Element
(PCE) Control of Wavelength Switched Optical Networks (WSONs),
ITU-T G.694.1 (02/2012): Spectral grids for WDM applications:
DWDM frequency grid";
}
identity wson-grid-cwdm {
base l0-grid-type;
description
"CWDM grid";
reference
"RFC6205: Generalized Labels for
Lambda-Switch-Capable (LSC) Label Switching Routers,
ITU-T G.694.2 (12/2003): Spectral grids for WDM applications:
CWDM wavelength grid";
}
identity dwdm-ch-spc-type {
description
"DWDM channel spacing type";
reference
"RFC6205: Generalized Labels for
Lambda-Switch-Capable (LSC) Label Switching Routers,
ITU-T G.694.1 (02/2012): Spectral grids for WDM applications:
DWDM frequency grid";
}
identity dwdm-100ghz {
base dwdm-ch-spc-type;
description
"100GHz channel spacing";
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}
identity dwdm-50ghz {
base dwdm-ch-spc-type;
description
"50GHz channel spacing";
}
identity dwdm-25ghz {
base dwdm-ch-spc-type;
description
"25GHz channel spacing";
}
identity dwdm-12p5ghz {
base dwdm-ch-spc-type;
description
"12.5GHz channel spacing";
}
identity flexi-ch-spc-type {
description
"Flexi-grid channel spacing type";
reference
"RFC7698: Framework and Requirements for GMPLS-Based Control
of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
Networks
ITU-T G.694.1 (02/2012): Spectral grids for WDM applications:
DWDM frequency grid";
}
identity flexi-ch-spc-6p25ghz {
base flexi-ch-spc-type;
description
"6.25GHz channel spacing";
}
identity flexi-slot-width-granularity {
description
"Flexi-grid slot width granularity";
}
identity flexi-swg-12p5ghz {
base flexi-slot-width-granularity;
description
"12.5GHz slot width granularity";
}
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identity cwdm-ch-spc-type {
description
"CWDM channel spacing type";
reference
"RFC6205: Generalized Labels for
Lambda-Switch-Capable (LSC) Label Switching Routers,
ITU-T G.694.2 (12/2003): Spectral grids for WDM applications:
CWDM wavelength grid";
}
identity cwdm-20nm {
base cwdm-ch-spc-type;
description
"20nm channel spacing";
}
/* Groupings. */
grouping wson-label-start-end {
description
"The WSON label-start or label-end used to
specify WSON label range.";
choice grid-type {
description
"Label for DWDM or CWDM grid";
case dwdm {
leaf dwdm-n {
when 'derived-from-or-self(../../../grid-type,
"wson-grid-dwdm")'
{
description
"Valid only when grid type is DWDM.";
}
type l0-types:dwdm-n;
description
"The central frequency of DWDM. ";
reference
"RFC6205: Generalized Labels for
Lambda-Switch-Capable (LSC) Label Switching Routers";
}
}
case cwdm {
leaf cwdm-n {
when 'derived-from-or-self(../../../grid-type,
"wson-grid-cwdm")'
{
description
"Valid only when grid type is CWDM.";
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}
type l0-types:cwdm-n;
description
"Channel wavelength computing input. ";
reference
"RFC6205: Generalized Labels for
Lambda-Switch-Capable (LSC) Label Switching Routers";
}
}
}
reference
"RFC6205: Generalized Labels for
Lambda-Switch-Capable (LSC) Label Switching Routers";
}
grouping wson-label-hop {
description
"Generic label hop information for WSON";
choice grid-type {
description
"Label for DWDM or CWDM grid";
case dwdm {
choice single-or-super-channel {
description "single or super channel";
case single {
leaf dwdm-n {
type l0-types:dwdm-n;
description
"The given value 'N' is used to determine the
nominal central frequency.";
}
}
case super {
leaf-list subcarrier-dwdm-n {
type l0-types:dwdm-n;
description
"The given values 'N' are used to determine the
nominal central frequency for each subcarrier
channels.";
reference
"ITU-T Recommendation G.694.1: Spectral grids for
WDM applications: DWDM frequency grid";
}
}
}
}
case cwdm {
leaf cwdm-n {
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type l0-types:cwdm-n;
description
"The given value 'N' is used to determine the nominal
central wavelength.";
reference
"RFC6205: Generalized Labels for
Lambda-Switch-Capable (LSC) Label Switching Routers";
}
}
}
reference
"RFC6205: Generalized Labels for
Lambda-Switch-Capable (LSC) Label Switching Routers";
}
grouping l0-label-range-info {
description
"Information for layer 0 label range.";
leaf grid-type {
type identityref {
base l0-grid-type;
}
description "Grid type";
}
leaf priority {
type uint8;
description
"Priority in Interface Switching Capability
Descriptor (ISCD).";
reference
"RFC4203: OSPF Extensions in Support of Generalized
Multi-Protocol Label Switching (GMPLS).";
}
reference
"RFC6205: Generalized Labels for
Lambda-Switch-Capable (LSC) Label Switching Routers";
}
grouping wson-label-step {
description "Label step information for WSON";
choice l0-grid-type {
description
"Grid type: DWDM, CWDM, etc.";
case dwdm {
leaf wson-dwdm-channel-spacing {
when 'derived-from-or-self(../../grid-type,
"wson-grid-dwdm")'
{
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description
"Valid only when grid type is DWDM.";
}
type identityref {
base dwdm-ch-spc-type;
}
description
"Label-step is the channel-spacing (GHz), e.g.,
100.000, 50.000, 25.000, or 12.500 GHz for DWDM";
reference
"RFC6205: Generalized Labels for
Lambda-Switch-Capable (LSC) Label Switching Routers";
}
}
case cwdm {
leaf wson-cwdm-channel-spacing {
when 'derived-from-or-self(../../grid-type,
"wson-grid-cwdm")'
{
description
"Valid only when grid type is CWDM.";
}
type identityref {
base cwdm-ch-spc-type;
}
description
"Label-step is the channel-spacing (nm), i.e., 20 nm
for CWDM, which is the only value defined for CWDM";
reference
"RFC6205: Generalized Labels for
Lambda-Switch-Capable (LSC) Label Switching Routers";
}
}
}
reference
"RFC6205: Generalized Labels for
Lambda-Switch-Capable (LSC) Label Switching Routers
ITU-T G.694.2 (12/2003): Spectral grids for WDM applications:
CWDM wavelength grid";
}
grouping flexi-grid-label-start-end {
description
"The Flexi-grid label-start or label-end used to
specify Flexi-grid label range.";
leaf flexi-n {
type l0-types:flexi-n;
description
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"The given value 'N' is used to determine the nominal
central frequency.";
}
reference
"RFC7698: Framework and Requirements for GMPLS-Based Control
of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
Networks";
}
grouping flexi-grid-frequency-slot {
description "Flexi-grid frequency slot grouping.";
uses flexi-grid-label-start-end;
leaf flexi-m {
type l0-types:flexi-m;
description
"The given value 'M' is used to determine the slot width.";
}
reference
"RFC7698: Framework and Requirements for GMPLS-Based Control
of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
Networks";
}
grouping flexi-grid-label-hop {
description
"Generic label hop information for Flexi-grid";
choice single-or-super-channel {
description "single or super channel";
case single {
uses flexi-grid-frequency-slot;
}
case super {
list subcarrier-flexi-n {
key flexi-n;
uses flexi-grid-frequency-slot;
description
"List of subcarrier channels for flexi-grid
super channel.";
}
}
}
reference
"RFC7698: Framework and Requirements for GMPLS-Based Control
of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
Networks";
}
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grouping flexi-grid-label-range-info {
description
"Info of Flexi-grid-specific label range";
uses l0-label-range-info;
container flexi-grid {
description "flexi-grid definition";
leaf slot-width-granularity {
type identityref {
base flexi-slot-width-granularity;
}
default flexi-swg-12p5ghz;
description
"Minimum space between slot widths. Default is
12.500 GHz";
reference
"RFC7698: Framework and Requirements for GMPLS-Based
Control of Flexi-Grid Dense Wavelength Division
Multiplexing (DWDM) Networks";
}
leaf min-slot-width-factor {
type uint16 {
range "1..max";
}
default 1;
description
"Slot width range: two multipliers of the slot width ,
granularity, each indicating the minimal and maximal slot
width supported by a port, respectively.
Minimum slot width is calculated by:
Minimum slot width (GHz) =
min-slot-width-factor * slot-width-granularity.
Minimum slot width should be smaller than or equal to
Maximum slot width. ";
reference
"RFC8363: GMPLS OSPF-TE Extensions in Support of Flexi-Grid
Dense Wavelength Division Multiplexing (DWDM) Networks";
}
leaf max-slot-width-factor {
type uint16 {
range "1..max";
}
description
"Slot width range: two multipliers of the slot width ,
granularity, each indicating the minimal and maximal slot
width supported by a port, respectively.
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Maximum slot width is calculated by:
Maximum slot width (GHz) =
max-slot-width-factor * slot-width-granularity
Maximum slot width should be bigger than or equal to
Minimum slot width. ";
reference
"RFC8363: GMPLS OSPF-TE Extensions in Support of Flexi-Grid
Dense Wavelength Division Multiplexing (DWDM) Networks";
}
}
}
grouping flexi-grid-label-step {
description "Label step information for flexi-grid";
leaf flexi-grid-channel-spacing {
type identityref {
base flexi-ch-spc-type;
}
default flexi-ch-spc-6p25ghz;
description
"Label-step is the nominal central frequency
granularity (GHz), e.g., 6.25 GHz";
reference
"RFC7699: Generalized Labels for the Flexi-Grid in
Lambda Switch Capable (LSC) Label Switching Routers";
}
leaf flexi-n-step {
type uint8;
description
"This attribute defines the multiplier for the supported
values of 'N'.
For example, given a grid with a nominal central frequency
granularity of 6.25 GHz, the granularity of the supported
values of the nominal central frequency could be 12.5 GHz.
In this case, the values of flexi-n should be even and this
constraints is reported by setting the flexi-n-step to 2.
This attribute is also known as central frequency
granularity in RFC8363.";
reference
"RFC8363: GMPLS OSPF-TE Extensions in Support of Flexi-Grid
Dense Wavelength Division Multiplexing (DWDM) Networks";
}
}
}
<CODE ENDS>
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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 NETCONF access control model [RFC8341] provides the means to
restrict access for particular NETCONF users to a preconfigured
subset of all available NETCONF protocol operations and content. The
NETCONF Protocol over Secure Shell (SSH) [RFC6242] describes a method
for invoking and running NETCONF within a Secure Shell (SSH) session
as an SSH subsystem. The NETCONF 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.
The objects in this YANG module are common data types and groupings.
No object in this module can be read or written to. These
definitions can be imported and used by other layer 0 specific
modules. It is critical consider how imported definitions will be
utilized and accessible via RPC operations, as the resultant schema
will have data nodes that can be writable, or readable, and will have
a significant effect on the network operations if used incorrectly or
maliciously. All of this consideration belongs in the document that
defines the modules that import from this YANG module. Therefore, it
is important to manage access to resultant data nodes that are
considered sensitive or vulnerable in some network environments.
The security considerations spelled out in the YANG 1.1 specification
[RFC7950] apply for this document as well.
5. IANA Considerations
It is proposed to IANA to assign new URIs from the "IETF XML
Registry" [RFC3688] as follows:
URI: urn:ietf:params:xml:ns:yang:ietf-layer0-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 [RFC7950].
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name: ietf-layer0-types
namespace: urn:ietf:params:xml:ns:yang:ietf-layer0-types
prefix: l0-types
reference: RFC XXXX(TBD)
6. Acknowledgements
The authors and the working group give their sincere thanks for
Robert Wilton for the YANG doctor review, and Tom Petch for his
comments during the model and document development.
7. Contributors
Dhruv Dhody
Huawei
Email: dhruv.ietf@gmail.com
Bin Yeong Yoon
ETRI
Email: byyun@etri.re.kr
Ricard Vilalta
CTTC
Email: ricard.vilalta@cttc.es
Italo Busi
Huawei
Email: Italo.Busi@huawei.com
8. References
8.1. Normative References
[RFC4203] Kompella, K., Ed. and Y. Rekhter, Ed., "OSPF Extensions in
Support of Generalized Multi-Protocol Label Switching
(GMPLS)", RFC 4203, DOI 10.17487/RFC4203, October 2005,
<https://www.rfc-editor.org/info/rfc4203>.
[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>.
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[RFC7699] Farrel, A., King, D., Li, Y., and F. Zhang, "Generalized
Labels for the Flexi-Grid in Lambda Switch Capable (LSC)
Label Switching Routers", RFC 7699, DOI 10.17487/RFC7699,
November 2015, <https://www.rfc-editor.org/info/rfc7699>.
[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>.
[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>.
[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>.
8.2. Informative References
[ITU-Tg6941]
International Telecommunication Union, "Spectral grids for
WDM applications: DWDM frequency grid", ITU-T G.694.1,
February 2012.
[ITU-Tg6942]
International Telecommunication Union, "Spectral grids for
WDM applications: CWDM wavelength grid", ITU-T G.694.2,
December 2003.
[ITU-Tg6982]
International Telecommunication Union, "Amplified
multichannel dense wavelength division multiplexing
applications with single channel optical interfaces",
ITU-T G.698.2, November 2018.
[ITU-Tg709]
International Telecommunication Union, "Interfaces for the
optical transport network", ITU-T G.709, June 2016.
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[RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
DOI 10.17487/RFC3688, January 2004,
<https://www.rfc-editor.org/info/rfc3688>.
[RFC6163] Lee, Y., Ed., Bernstein, G., Ed., and W. Imajuku,
"Framework for GMPLS and Path Computation Element (PCE)
Control of Wavelength Switched Optical Networks (WSONs)",
RFC 6163, DOI 10.17487/RFC6163, April 2011,
<https://www.rfc-editor.org/info/rfc6163>.
[RFC6205] Otani, T., Ed. and D. Li, Ed., "Generalized Labels for
Lambda-Switch-Capable (LSC) Label Switching Routers",
RFC 6205, DOI 10.17487/RFC6205, March 2011,
<https://www.rfc-editor.org/info/rfc6205>.
[RFC7205] Romanow, A., Botzko, S., Duckworth, M., and R. Even, Ed.,
"Use Cases for Telepresence Multistreams", RFC 7205,
DOI 10.17487/RFC7205, April 2014,
<https://www.rfc-editor.org/info/rfc7205>.
[RFC7446] Lee, Y., Ed., Bernstein, G., Ed., Li, D., and W. Imajuku,
"Routing and Wavelength Assignment Information Model for
Wavelength Switched Optical Networks", RFC 7446,
DOI 10.17487/RFC7446, February 2015,
<https://www.rfc-editor.org/info/rfc7446>.
[RFC7581] Bernstein, G., Ed., Lee, Y., Ed., Li, D., Imajuku, W., and
J. Han, "Routing and Wavelength Assignment Information
Encoding for Wavelength Switched Optical Networks",
RFC 7581, DOI 10.17487/RFC7581, June 2015,
<https://www.rfc-editor.org/info/rfc7581>.
[RFC7698] Gonzalez de Dios, O., Ed., Casellas, R., Ed., Zhang, F.,
Fu, X., Ceccarelli, D., and I. Hussain, "Framework and
Requirements for GMPLS-Based Control of Flexi-Grid Dense
Wavelength Division Multiplexing (DWDM) Networks",
RFC 7698, DOI 10.17487/RFC7698, November 2015,
<https://www.rfc-editor.org/info/rfc7698>.
[RFC8363] Zhang, X., Zheng, H., Casellas, R., Gonzalez de Dios, O.,
and D. Ceccarelli, "GMPLS OSPF-TE Extensions in Support of
Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
Networks", RFC 8363, DOI 10.17487/RFC8363, May 2018,
<https://www.rfc-editor.org/info/rfc8363>.
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[RFC8776] Saad, T., Gandhi, R., Liu, X., Beeram, V., and I. Bryskin,
"Common YANG Data Types for Traffic Engineering",
RFC 8776, DOI 10.17487/RFC8776, June 2020,
<https://www.rfc-editor.org/info/rfc8776>.
Authors' Addresses
Haomian Zheng
Huawei Technologies
H1, Huawei Xiliu Beipo Village, Songshan Lake
Dongguan, Guangdong 523808
China
Email: zhenghaomian@huawei.com
Young Lee
Samsung
South Korea
Email: younglee.tx@gmail.com
Aihua Guo
Futurewei
Email: aihuaguo.ietf@gmail.com
Victor Lopez
Telefonica
Email: victor.lopezalvarez@telefonica.com
Daniel King
University of Lancaster
Email: d.king@lancaster.ac.uk
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