| CCAMP Working Group | H. Zheng |
| Internet-Draft | Huawei Technologies |
| Intended status: Standards Track | Y. Lee |
| Expires: May 31, 2020 | SKKU |
| A. Guo | |
| Futurewei | |
| V. Lopez | |
| Telefonica | |
| D. King | |
| University of Lancaster | |
| November 28, 2019 |
A YANG Data Model for Layer 0 Types
draft-ietf-ccamp-layer0-types-03
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.
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 May 31, 2020.
Copyright (c) 2019 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.
YANG [RFC6020] and [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] .
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].
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 |
+-------------+---------------------------+----------------------+
| layer0-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].
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:
Operational-mode:
A type that represents operational mode as defined in [ITU-Tg6982].
layer0-node-type:
A base YANG identity for supported node type as defined in [RFC6163].
wavelength-assignment:
A base YANG identity for allocated wavelength assignment type as defined in [RFC6163].
layer0-grid-type:
A base YANG identity for the grid type as defined in [RFC6163] and [RFC7698].
term-type:
A base YANG identity for the supported termination type as defined in [ITU-Tg709].
layer0-bandwidth-type:
A base YANG identity for the layer0 bandwidth type as defined in [ITU-Tg709].
dwdm-ch-spc-type:
A base YANG identity for the DWDM channel spacing type as defined in [RFC6205].
cwdm-ch-spc-type:
A base YANG identity for the CWDM channel spacing type as defined in [RFC6205].
FEC-type:
A base YANG identity for the FEC type as defined in [ITU-Tg709].
wson-path-bandwidth:
A YANG grouping that defines the WSON path bandwidth attributes as defined in [RFC6163].
wson-link-bandwidth:
A YANG grouping that defines WSON link bandwidth attributes as defined in [RFC6163].
wson-label-start-end:
A YANG grouping that defines the label-start and label-end for WSON as defined in [RFC6205].
wson-label-hop:
A YANG grouping that defines the label hop for WSON as defined in [RFC6205].
layer0-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 [I-D.ietf-teas-yang-te-types].
flexi-grid-node-attributes:
A YANG grouping that defines flexi-grid node attributes as defined in [RFC7698].
flexi-grid-path-bandwidth:
A YANG grouping that defines flexi-grid path bandwidth attributes as defined in [RFC7698].
flexi-grid-link-bandwidth:
A YANG grouping that defines flexi-grid link bandwidth attributes as defined in [RFC7698].
flexi-grid-label-start-end:
A YANG grouping that defines the label-start and label-end for flexi-grid as defined in [RFC7698].
flexi-grid-channel:
A YANG grouping that defines flexi-grid channel 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 [I-D.ietf-teas-yang-te-types].
<CODE BEGINS>file "ietf-layer0-types@2019-11-28.yang"
module ietf-layer0-types {
namespace "urn:ietf:params:xml:ns:yang:ietf-layer0-types";
prefix "layer0-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@futurewei.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) 2019 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).
This version of this YANG module is part of RFC XXXX; see
the RFC itself for full legal notices.";
revision "2019-11-28" {
description
"Initial Version";
reference
"RFC XXXX: A YANG Data Model for Layer 0 Types";
}
typedef operational-mode {
type string;
description
"Vendor-specific mode that guarantees interoperability.
It must be an string with the following format:
B-DScW-ytz(v) where all these attributes are conforming
to the ITU-T recommendation";
reference "ITU-T G.698.2 (11/2018) Section 5.3";
}
typedef frequency-thz {
type decimal64 {
fraction-digits 6;
}
units THz;
description
"The DWDM frequency in THz, e.g., 193.112500";
reference
"RFC6205: Generalized Labels for
Lambda-Switch-Capable (LSC) Label Switching Routers";
}
typedef frequency-ghz {
type decimal64 {
fraction-digits 3;
}
units GHz;
description
"The DWDM frequency in GHz, e.g., 193112.500";
reference
"RFC6205: Generalized Labels for
Lambda-Switch-Capable (LSC) Label Switching Routers";
}
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 12.500 GHz,
where 193100.000 GHz (193.100000 THz) is the ITU-T 'anchor
frequency' for transmission over the C band. ";
reference
"RFC6205: Generalized Labels for
Lambda-Switch-Capable (LSC) Label Switching Routers";
}
typedef cwdm-n
{
type int16;
description
"The given value 'N' is used to compute the channel
wavelength as per the formula:
Wavelength (nm) = 1471 + N x 20 ";
reference
"RFC6205: Generalized Labels for
Lambda-Switch-Capable (LSC) Label Switching Routers";
}
typedef flexi-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 6.250 GHz,
where 193100.000 GHz (193.100000 THz) is the ITU-T 'anchor
frequency' for transmission over the C band. ";
reference
"RFC7698: Framework and Requirements for GMPLS-Based Control
of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
Networks";
}
identity layer0-node-type {
description
"layer0 node type.";
reference
"RFC6163:Framework for GMPLS and Path Computation Element
(PCE) Control of Wavelength Switched Optical Networks (WSONs)";
}
identity flexi-grid-node {
base layer0-node-type;
description
"Flexi-grid node";
}
identity wson-node-foadm {
base layer0-node-type;
description
"Fixed OADM (Optical Add-Drop Multiplexer) node";
}
identity wson-node-roadm {
base layer0-node-type;
description
"ROADM (Reconfigurable Optical Add-Drop Multiplexer)
or OXC (Optical Cross Connect) node";
}
identity wson-node-ila {
base layer0-node-type;
description
"ILA (In-Line Amplifier) node";
}
identity wavelength-assignment {
description
"Wavelength selection base";
reference
"RFC6163:Framework for GMPLS and Path Computation Element
(PCE) Control of Wavelength Switched Optical Networks (WSONs)";
}
identity unspecified-wavelength-assignment {
base wavelength-assignment;
description
"No method specified";
}
identity first-fit-wavelength-assignment {
base wavelength-assignment;
description
"All the available wavelengths are numbered,
and this WA (Wavelength Assignment) method chooses
the available wavelength with the lowest index";
}
identity random-wavelength-assignment {
base wavelength-assignment;
description
"This WA method chooses an available
wavelength randomly";
}
identity least-loaded-wavelength-assignment {
base wavelength-assignment;
description
"This WA method selects the wavelength that
has the largest residual capacity on the most loaded
link along the route (in multi-fiber networks)";
}
identity layer0-grid-type {
description
"Layer 0 grid type";
reference
"RFC6163:Framework for GMPLS and Path Computation Element
(PCE) Control of Wavelength Switched Optical Networks (WSONs)";
}
identity flexi-grid-dwdm {
base layer0-grid-type;
description
"Flexi-grid";
reference
"RFC7698: Framework and Requirements for GMPLS-Based Control
of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
Networks";
}
identity wson-grid-dwdm {
base layer0-grid-type;
description
"DWDM grid";
}
identity wson-grid-cwdm {
base layer0-grid-type;
description
"CWDM grid";
}
identity term-type {
description
"Termination type";
reference
"ITU-T G.709: Interfaces for the Optical Transport Network";
}
identity term-phys {
base term-type;
description
"Physical layer termination";
}
identity term-otu {
base term-type;
description
"OTU (Optical Transport Unit) termination";
}
identity term-odu {
base term-type;
description
"ODU (Optical Data Unit) termination";
}
identity term-opu {
base term-type;
description
"OPU (Optical Payload Unit) termination";
}
identity term-section {
base term-type;
description
"Section layer termination";
}
identity layer0-bandwidth-type {
description
"Bandwidth type carried by a single wavelength channel";
reference
"ITU-T G.709: Interfaces for the Optical Transport Network";
}
identity bw-otu1 {
base layer0-bandwidth-type;
description
"OTU1 (2.66G)";
}
identity bw-otu1e {
base layer0-bandwidth-type;
description
"OTU1e (11.04G)";
}
identity bw-otu1f {
base layer0-bandwidth-type;
description
"OTU1f (11.27G)";
}
identity bw-otu2 {
base layer0-bandwidth-type;
description
"OTU2 (10.70G)";
}
identity bw-otu2e {
base layer0-bandwidth-type;
description
"OTU2e (11.09G)";
}
identity bw-otu2f {
base layer0-bandwidth-type;
description
"OTU2f (11.31G)";
}
identity bw-otu3 {
base layer0-bandwidth-type;
description
"OTU3 (43.01G)";
}
identity bw-otu3e1 {
base layer0-bandwidth-type;
description
"OTU3e1 (44.57G)";
}
identity bw-otu3e2 {
base layer0-bandwidth-type;
description
"OTU3e2 (44.58G)";
}
identity bw-otu4 {
base layer0-bandwidth-type;
description
"OTU4 (111.80G)";
}
identity bw-otucn {
base layer0-bandwidth-type;
description
"OTUCn (beyond 100G)";
}
identity dwdm-ch-spc-type {
description
"DWDM channel spacing type";
reference
"RFC6205: Generalized Labels for
Lambda-Switch-Capable (LSC) Label Switching Routers";
}
identity dwdm-100ghz {
base dwdm-ch-spc-type;
description
"100GHz channel spacing";
}
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";
}
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";
}
identity cwdm-ch-spc-type {
description
"CWDM channel spacing type";
reference
"RFC6205: Generalized Labels for
Lambda-Switch-Capable (LSC) Label Switching Routers";
}
identity cwdm-20nm {
base cwdm-ch-spc-type;
description
"20nm channel spacing";
}
identity fec-type {
description
"FEC (Forward Error Correction) type";
reference
"ITU-T G.709: Interfaces for the Optical Transport Network";
}
identity g-fec {
base fec-type;
description
"G-FEC (Generic-FEC)";
}
identity e-fec {
base fec-type;
description
"E-FEC (Enhanced-FEC)";
}
identity no-fec {
base fec-type;
description
"No FEC";
}
/* Groupings. */
grouping wson-path-bandwidth {
description
"WSON (Wavelength Switched Optical Network)
path bandwidth attributes";
leaf bandwidth-type {
type identityref {
base layer0-bandwidth-type;
}
description "WSON bandwidth type";
}
reference
"RFC6163:Framework for GMPLS and Path Computation Element
(PCE) Control of Wavelength Switched Optical Networks (WSONs)";
}
grouping wson-link-bandwidth {
description
"WSON link bandwidth attributes";
leaf-list supported-bandwidth-list {
type identityref {
base layer0-bandwidth-type;
}
description "WSON bandwidth type";
}
reference
"RFC6163:Framework for GMPLS and Path Computation Element
(PCE) Control of Wavelength Switched Optical Networks (WSONs)";
}
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 {
type layer0-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 {
type layer0-types:cwdm-n;
description
"Channel wavelength computing input. ";
reference
"RFC6205: Generalized Labels for
ambda-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 layer0-types:dwdm-n;
description
"The central frequency of DWDM. ";
}
}
case super {
leaf-list subcarrier-dwdm-n {
type layer0-types:dwdm-n;
description
"List of center frequencies for each subcarrier
channels.";
reference
"ITU-T Recommendation G.694.1: Spectral girds for
WDM applications: DWDM frequency grid";
}
}
}
}
case cwdm {
leaf cwdm-n {
type layer0-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 layer0-label-range-info {
description
"Information for layer0 label range.";
leaf grid-type {
type identityref {
base layer0-grid-type;
}
description "Grid type";
}
leaf priority {
type uint8;
description "Priority";
}
reference
"RFC6205: Generalized Labels for
Lambda-Switch-Capable (LSC) Label Switching Routers";
}
grouping wson-label-step {
description "Label step information for WSON";
choice layer0-grid-type {
description
"Grid type: DWDM, CWDM, etc.";
case dwdm {
leaf wson-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 {
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";
}
grouping flexi-grid-node-attributes {
description "Flexi-grid node attributes";
container flexi-grid-node {
description "Flexi-grid node attrtibutes";
leaf node-type {
type identityref {
base layer0-node-type;
}
description "Flexi-grid node type";
}
}
reference
"RFC7698: Framework and Requirements for GMPLS-Based Control
of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
Networks";
}
grouping flexi-grid-path-bandwidth {
description "Flexi-grid path bandwidth attributes";
leaf bandwidth-type {
type identityref {
base layer0-bandwidth-type;
}
description "Flexi-grid bandwidth type";
}
reference
"RFC7698: Framework and Requirements for GMPLS-Based Control
of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
Networks";
}
grouping flexi-grid-link-bandwidth {
description "flexi-grid link bandwidth attributes";
leaf-list supported-bandwidth-list {
type identityref {
base layer0-bandwidth-type;
}
description "Flexi-grid bandwidth type";
}
reference
"RFC7698: Framework and Requirements for GMPLS-Based Control
of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
Networks";
}
grouping flexi-grid-label-start-end {
description
"Label-start and Label-end information for Flexi-grid.";
leaf flexi-n {
type int16;
description
"The central frequency in Flexi-grid.";
}
reference
"RFC7698: Framework and Requirements for GMPLS-Based Control
of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
Networks";
}
grouping flexi-grid-channel {
description "Flexi-grid channel grouping.";
uses flexi-grid-label-start-end;
leaf flexi-m {
type uint16 {
range "1..max";
}
description
"M is used to determine the slot width. A slot width is
constrained to be M x SWG (that is, M x 12.500 GHz),
where M is a positive integer.";
}
reference
"RFC7698: Framework and Requirements for GMPLS-Based Control
of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
Networks";
}
grouping flexi-grid-label-hop {
description "Flexi-grid path label.";
choice single-or-super-channel {
description "single of super channel";
case single {
uses flexi-grid-channel;
}
case super {
list subcarrier-flexi-n {
key flexi-n;
uses flexi-grid-channel;
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";
}
grouping flexi-grid-label-range-info {
description
"Info of Flexi-grid-specific label range";
uses layer0-label-range-info;
container flexi-grid {
description "flexi-grid definition";
leaf nominal-central-frequency-granularity {
type identityref {
base flexi-ch-spc-type;
}
default flexi-ch-spc-6p25ghz;
description
"It is the spacing between allowed nominal central
frequencies. Default is 6.250 GHz";
reference
"RFC7698: Framework and Requirements for GMPLS-Based Control
of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
Networks";
}
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
"Minimum slot width is calculated by:
Minimum slot width (GHz) =
min-slot-width-factor * slot-width-granularity";
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
"Maximum slot width is calculated by:
Maximum slot width (GHz) =
max-slot-width-factor * slot-width-granularity";
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 flex {
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
"RFC7698: Framework and Requirements for GMPLS-Based Control
of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
Networks";
}
}
<CODE ENDS>
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 YANG module in this document defines optical layer0 type definitions (i.e., typedef, identity and grouping statements) in YANG data modeling language to be imported and used by other layer 0 specific modules. When imported and used, the resultant schema will have data nodes that can be writable, or readable. The access to such data nodes may be considered sensitive or vulnerable in some network environments. Write operations (e.g., edit-config) to these data nodes without proper protection can have a negative effect on network operations.
The security considerations spelled out in the YANG 1.1 specification [RFC7950] apply for this document as well.
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-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].
name: ietf-layer0-types
namespace: urn:ietf:params:xml:ns:yang:ietf-layer0-types
prefix: layer0-types
reference: RFC XXXX(TBD)
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.
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