CCAMP Working Group H. Zheng
Internet-Draft Huawei Technologies
Intended status:
Internet Engineering Task Force (IETF) 郑好棉 (H. Zheng)
Request for Comments: 9093 华为技术有限公司 (Huawei Technologies)
Category: Standards Track Y. Lee
Expires: July 2, 2021
ISSN: 2070-1721 Samsung
A. Guo
Futurewei
V. Lopez
Telefonica
Nokia
D. King
University of Lancaster
December 29, 2020
July 2021
A YANG Data Model for Layer 0 Types
draft-ietf-ccamp-layer0-types-09
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 flexi-grid
Dense Wavelength Division Multiplexing (DWDM) Networks. 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 an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list It represents the consensus of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid the IETF community. It has
received public review and has been approved for a maximum publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 7841.
Information about the current status of six months this document, any errata,
and how to provide feedback on it may be updated, replaced, or obsoleted by other documents obtained 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 July 2, 2021.
https://www.rfc-editor.org/info/rfc9093.
Copyright Notice
Copyright (c) 2020 2021 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 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 Module for Layer 0 Types . . . . . . . . . . . . . . . . . 5
4. Security Considerations . . . . . . . . . . . . . . . . . . . 17
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 18
6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 18
7. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 18
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 19
8.1.
6.1. Normative References . . . . . . . . . . . . . . . . . . 19
8.2.
6.2. Informative References . . . . . . . . . . . . . . . . . 20
Acknowledgements
Contributors
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 the Network
Configuration Protocol (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) aspects) for Layer 0 optical networks in
model(s) defined outside of this document. The applicability of
Layer 0 types specified in this document include includes Wavelength Switched
Optical Networks (WSONs) [RFC6163] [ITU-Tg6982] and [ITU-Tg6982], and Flexi-grid flexi-grid Dense
Wavelength Division Multiplexing (DWDM) Networks networks [RFC7698] and
[ITU-Tg6941] .
[ITU-Tg6941].
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] RFC 9093 |
+-------------+---------------------------+----------------------+
Note:
+----------+-------------------+-----------+
Table 1: Data Node Names
The RFC Editor will replace XXXX with the number assigned to
the RFC once this document becomes an RFC. YANG module ietf-layer0-types "ietf-layer0-types" (defined in Section 3) references
[RFC4203], [RFC6163], [RFC6205], [RFC7698], [RFC7699], [RFC8363],
[ITU-Tg6941], and [RFC7698]. [ITU-Tg6942].
2. Layer 0 Types Module Contents
This document defines a YANG module for common Layer 0 types, ietf-
layer0-types. This module is used for WSON and Flexi-grid flexi-grid DWDM
networks. The ietf-layer0-types "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 channel-spacing type as defined
in [RFC6205].
cwdm-ch-spc-type:
A base YANG identity for the CWDM channel spacing Coarse Wavelength Division
Multiplexing (CWDM) channel-spacing type as defined in [RFC6205].
wson-label-start-end:
The WSON label range was defined in [RFC6205], and the generic
topology model defines the label-start/label-end in [RFC8795].
This grouping shows the WSON-specific label-start and label-end
information.
wson-label-hop:
The WSON label range was defined in [RFC6205], and the generic
topology model defines the label-hop in [RFC8795]. This grouping
shows the WSON-specific label-hop information.
l0-label-range-info:
A YANG grouping that defines the layer 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 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:
Flexi-grid
The flexi-grid label range was defined in [RFC7698], and the
generic topology model defines the label-start/label-end in
[RFC8795]. This grouping shows the flexi-grid-specific label-start label-
start and label-end information.
flexi-grid-label-hop:
Flexi-grid
The flexi-grid label range was defined in [RFC7698], and the
generic topology model defines the label-hop in [RFC8795]. This
grouping shows the WSON-specific label-hop information.
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].
3. YANG Code Module for Layer 0 Types
<CODE BEGINS>file "ietf-layer0-types@2020-12-29.yang" BEGINS> file "ietf-layer0-types@2021-07-20.yang"
module ietf-layer0-types {
yang-version 1.1;
namespace "urn:ietf:params:xml:ns:yang:ietf-layer0-types";
prefix "l0-types"; l0-types;
organization
"IETF CCAMP Working Group";
contact
"WG Web: <http://tools.ietf.org/wg/ccamp/> <https://datatracker.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>
<mailto:victor.lopez@nokia.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. flexi-grid optical networks.
Copyright (c) 2020 2021 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).
(https://trustee.ietf.org/license-info).
This version of this YANG module is part of RFC XXXX; 9093; see
the RFC itself for full legal notices.";
revision "2020-12-29" 2021-07-20 {
description
"Initial Version"; version";
reference
"RFC XXXX: 9093: 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' 'f', is defined by:
f = 193100.000 GHz + N x channel-spacing channel spacing (measured in GHz),
where 193100.000 GHz (193.100000 THz) is the ITU-T 'anchor
frequency' for transmission over the C band; DWDM grid, and where
'channel-spacing'
'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): (10/2020): 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 channel spacing (measured in nm)
where 1471 nm is the ITU-T conventional 'anchor wavelength' for
transmission over the C band; CWDM grid, and where 'channel-spacing' 'channel spacing'
is defined by the cwdm-ch-spc-type.";
reference
"RFC6205:
"RFC 6205: 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;
description
"The given value 'N' is used to determine the nominal central
frequency.
The nominal central frequency, 'f' 'f', is defined by, by:
f = 193100.000 GHz + N x channel-spacing channel spacing (measured in GHz),
where 193100.000 GHz (193.100000 THz) is the ITU-T 'anchor
frequency' for transmission over the C band; DWDM grid, and where
'channel-spacing'
'channel spacing' is defined by the flexi-ch-spc-type.
Note that the term 'channel-spacing' 'channel spacing' can be alternated substituted by the
term 'nominal central frequency granularity' defined in
clause 7 8 of ITU-T G.694.1.";
reference
"RFC7698:
"RFC 7698: Framework and Requirements for GMPLS-Based Control
of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
Networks.
Networks,
ITU-T G.694.1 (02/2012): (10/2020): 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:
"RFC 7698: Framework and Requirements for GMPLS-Based Control
of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
Networks.
ITU-T G.694.1 (02/2012): (10/2020): Spectral grids for WDM applications:
DWDM frequency grid";
}
identity l0-grid-type {
description
"Layer 0 grid type";
reference
"RFC6163:Framework
"RFC 6163: Framework for GMPLS and Path Computation Element
(PCE) Control of Wavelength Switched Optical Networks (WSONs),
ITU-T G.694.1 (02/2012): (10/2020): Spectral grids for WDM applications:
DWDM frequency grid,
ITU-T G.694.2 (12/2003): Spectral grids for WDM applications:
CWDM wavelength grid";
}
identity flexi-grid-dwdm {
base l0-grid-type;
description
"Flexi-grid";
reference
"RFC7698:
"RFC 7698: Framework and Requirements for GMPLS-Based Control
of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
Networks,
ITU-T G.694.1 (02/2012): (10/2020): Spectral grids for WDM applications:
DWDM frequency grid";
}
identity wson-grid-dwdm {
base l0-grid-type;
description
"DWDM grid";
reference
"RFC6163:Framework
"RFC 6163:Framework for GMPLS and Path Computation Element
(PCE) Control of Wavelength Switched Optical Networks (WSONs),
ITU-T G.694.1 (02/2012): (10/2020): Spectral grids for WDM applications:
DWDM frequency grid";
}
identity wson-grid-cwdm {
base l0-grid-type;
description
"CWDM grid";
reference
"RFC6205:
"RFC 6205: 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 channel-spacing type";
reference
"RFC6205:
"RFC 6205: Generalized Labels for Lambda-Switch-Capable (LSC)
Label Switching Routers,
ITU-T G.694.1 (02/2012): (10/2020): Spectral grids for WDM applications:
DWDM frequency grid";
}
identity dwdm-100ghz {
base dwdm-ch-spc-type;
description
"100GHz
"100 GHz channel spacing";
}
identity dwdm-50ghz {
base dwdm-ch-spc-type;
description
"50GHz
"50 GHz channel spacing";
}
identity dwdm-25ghz {
base dwdm-ch-spc-type;
description
"25GHz
"25 GHz channel spacing";
}
identity dwdm-12p5ghz {
base dwdm-ch-spc-type;
description
"12.5GHz
"12.5 GHz channel spacing";
}
identity flexi-ch-spc-type {
description
"Flexi-grid channel spacing channel-spacing type";
reference
"RFC7698:
"RFC 7698: Framework and Requirements for GMPLS-Based Control
of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
Networks
Networks,
ITU-T G.694.1 (02/2012): (10/2020): Spectral grids for WDM applications:
DWDM frequency grid";
}
identity flexi-ch-spc-6p25ghz {
base flexi-ch-spc-type;
description
"6.25GHz
"6.25 GHz 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
"12.5 GHz slot width granularity";
}
identity cwdm-ch-spc-type {
description
"CWDM channel spacing channel-spacing type";
reference
"RFC6205:
"RFC 6205: 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")' "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:
"RFC 6205: 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")' "derived-from-or-self(../../../grid-type,
\"wson-grid-cwdm\")" {
description
"Valid only when grid type is CWDM.";
}
type l0-types:cwdm-n;
description
"Channel wavelength computing input.";
reference
"RFC6205:
"RFC 6205: Generalized Labels for Lambda-Switch-Capable
(LSC) Label Switching Routers";
}
}
}
reference
"RFC6205:
"RFC 6205: Generalized Labels for Lambda-Switch-Capable (LSC)
Label Switching Routers";
}
grouping wson-label-hop {
description
"Generic label hop 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.";
channel.";
reference
"ITU-T Recommendation G.694.1: Spectral grids for
WDM applications: DWDM frequency grid";
}
}
}
}
case cwdm {
leaf cwdm-n {
type l0-types:cwdm-n;
description
"The given value 'N' is used to determine the nominal
central wavelength.";
reference
"RFC6205:
"RFC 6205: Generalized Labels for Lambda-Switch-Capable
(LSC) Label Switching Routers";
}
}
}
reference
"RFC6205:
"RFC 6205: Generalized Labels for Lambda-Switch-Capable (LSC)
Label Switching Routers";
}
grouping l0-label-range-info {
description
"Information about layer 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:
"RFC 4203: OSPF Extensions in Support of Generalized
Multi-Protocol Label Switching (GMPLS)."; (GMPLS)";
}
reference
"RFC6205:
"RFC 6205: 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")' "derived-from-or-self(../../grid-type,
\"wson-grid-dwdm\")" {
description
"Valid only when grid type is DWDM.";
}
type identityref {
base dwdm-ch-spc-type;
}
description
"Label-step is the channel-spacing channel spacing (GHz), e.g., 100.000,
50.000, 25.000, or 12.500 GHz for DWDM"; DWDM.";
reference
"RFC6205:
"RFC 6205: 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")' "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 channel spacing (nm), i.e., 20 nm
for CWDM, which is the only value defined for CWDM"; CWDM.";
reference
"RFC6205:
"RFC 6205: Generalized Labels for Lambda-Switch-Capable
(LSC) Label Switching Routers";
}
}
}
reference
"RFC6205:
"RFC 6205: 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 flexi-grid label-start or label-end used to specify
Flexi-grid
flexi-grid label range.";
leaf flexi-n {
type l0-types:flexi-n;
description
"The given value 'N' is used to determine the nominal
central frequency.";
}
reference
"RFC7698:
"RFC 7698: 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:
"RFC 7698: 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 label-hop information for Flexi-grid"; 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; "flexi-n";
uses flexi-grid-frequency-slot;
description
"List of subcarrier channels for flexi-grid super
channel.";
}
}
}
reference
"RFC7698:
"RFC 7698: Framework and Requirements for GMPLS-Based Control
of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
Networks";
}
grouping flexi-grid-label-range-info {
description
"Flexi-grid-specific label range related information";
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; "flexi-swg-12p5ghz";
description
"Minimum space between slot widths. Default is 12.500
GHz";
GHz.";
reference
"RFC7698:
"RFC 7698: 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; "1";
description
"A multiplier of the slot width granularity, indicating
the minimum slot width supported by an optical port.
Minimum slot width is calculated by:
Minimum slot width (GHz) =
min-slot-width-factor * slot-width-granularity.";
reference
"RFC8363:
"RFC 8363: 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";
}
must '. >= min-slot-width-factor' ../min-slot-width-factor' {
error-message
"Maximum slot width must be greater than or equal to
minimum slot width.";
}
description
"A multiplier of the slot width granularity, indicating
the maximum slot width supported by an optical port.
Maximum slot width is calculated by:
Maximum slot width (GHz) =
max-slot-width-factor * slot-width-granularity
If specified, maximum slot width must be greater than or
equal to minimum slot width.If width. If not specified, maximum
slot width is equal to minimum slot width.";
reference
"RFC8363:
"RFC 8363: 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; "flexi-ch-spc-6p25ghz";
description
"Label-step is the nominal central frequency granularity
(GHz), e.g., 6.25 GHz"; GHz.";
reference
"RFC7699:
"RFC 7699: 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
constraint is reported by setting the flexi-n-step to 2.
This attribute is also known as central frequency
granularity in RFC8363."; RFC 8363.";
reference
"RFC8363:
"RFC 8363: GMPLS OSPF-TE Extensions in Support of Flexi-Grid
Dense Wavelength Division Multiplexing (DWDM) Networks";
}
}
}
<CODE ENDS>
4. Security Considerations
The YANG module specified in this document defines a schema for data
that is designed to be accessed via network management protocols such
as NETCONF [RFC6241] or RESTCONF [RFC8040]. The lowest NETCONF layer
is the secure transport layer, and the mandatory-to-implement secure
transport is Secure Shell (SSH) [RFC6242]. The lowest RESTCONF layer
is HTTPS, and the mandatory-to-implement secure transport is TLS
[RFC8446].
The NETCONF access control model Network Configuration Access Control Model (NACM) [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 NETCONF Protocol protocol over
Secure Shell (SSH) specification [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 Layer 0 specific
modules. It is critical to 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 these considerations belong 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 has assigned 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 the following YANG modules module in the YANG "YANG Module
Names
Names" registry [RFC7950].
name:
Name: ietf-layer0-types
namespace:
Namespace: urn:ietf:params:xml:ns:yang:ietf-layer0-types
prefix:
Prefix: l0-types
reference:
Reference: RFC XXXX(TBD) 9093
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.
6.1. Normative References
[ITU-Tg6982]
International Telecommunication Union,
ITU-T, "Amplified multichannel dense wavelength division
multiplexing applications with single channel optical
interfaces", ITU-T Recommendation G.698.2, November 2018.
[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>.
[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>.
[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>.
[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>.
[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>.
[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>.
[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>.
[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>.
[RFC8795] Liu, X., Bryskin, I., Beeram, V., Saad, T., Shah, H., and
O. Gonzalez de Dios, "YANG Data Model for Traffic
Engineering (TE) Topologies", RFC 8795,
DOI 10.17487/RFC8795, August 2020,
<https://www.rfc-editor.org/info/rfc8795>.
8.2.
6.2. Informative References
[ITU-Tg6941]
International Telecommunication Union,
ITU-T, "Spectral grids for WDM applications: DWDM
frequency grid", ITU-T Recommendation G.694.1,
February 2012. October
2020.
[ITU-Tg6942]
International Telecommunication Union,
ITU-T, "Spectral grids for WDM applications: CWDM
wavelength grid", ITU-T Recommendation G.694.2, December
2003.
[ITU-Tg709]
International Telecommunication Union, "Interfaces for the
optical transport network", ITU-T G.709, June 2016.
[RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
DOI 10.17487/RFC3688, January 2004,
<https://www.rfc-editor.org/info/rfc3688>.
[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>.
Acknowledgements
The authors and the working group give their sincere thanks to Robert
Wilton for the YANG doctor review and Tom Petch for his comments
during the model and document development.
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
Authors' Addresses
Haomian Zheng
Huawei Technologies
H1, Huawei Xiliu Beipo Village, Songshan Lake
Dongguan, Guangdong
Dongguan
Guangdong, 523808
China
Email: zhenghaomian@huawei.com
Additional contact information:
郑好棉
中国
523808
广东 东莞
松山湖华为溪流背坡村H1
华为技术有限公司
Young Lee
Samsung
South Korea
Email: younglee.tx@gmail.com
Aihua Guo
Futurewei
Email: aihuaguo.ietf@gmail.com
Victor Lopez
Telefonica
Nokia
Email: victor.lopezalvarez@telefonica.com victor.lopez@nokia.com
Daniel King
University of Lancaster
Email: d.king@lancaster.ac.uk