Internet-Draft A YANG Data Model for Layer 1 Types September 2021
Zheng & Busi Expires 12 March 2022 [Page]
Workgroup:
CCAMP Working Group
Internet-Draft:
draft-ietf-ccamp-layer1-types-11
Published:
Intended Status:
Standards Track
Expires:
Authors:
H. Zheng
Huawei Technologies
I. Busi
Huawei Technologies

A YANG Data Model for Layer 1 Types

Abstract

This document defines a collection of common data types and groupings in the YANG data modeling language for use with layer 1 networks. These derived common types and groupings are intended to be imported by modules that specify OTN networks, such as topology, tunnel, client signal adaptation and service.

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 12 March 2022.

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Table of Contents

1. Introduction

This document specifies common data types for use in YANG [RFC7950] data models of Layer 1 networks. The derived types and groupings are types applicable to modeling Traffic Engineering (TE) for Layer 1 networks.

The Optical Transport Networking, a typical Layer 1 network, is specified in [RFC7062]. The corresponding routing and signaling protocol are specified in [RFC7138] and [RFC7139]. The types and groupings defined in this document are consistent to those documents, and can be imported into other Layer 1 data models, including but not limited to, [I-D.ietf-ccamp-otn-topo-yang], [I-D.ietf-ccamp-otn-tunnel-model], [I-D.ietf-ccamp-client-signal-yang] and [I-D.ietf-ccamp-l1csm-yang].

The data model in this draft only defines groupings, typedef and identities. There is no configuration or state data as specified in the Network Management Datastore Architecture [RFC8342]. The document is consistent with other specifications, including [MEF63] for Layer 1 service attributes, [ITU-Tg709] and [ITU-Tgsup43] for OTN data plane definitions.

2. Terminology and Notations

Refer to [RFC7062] for the key terms used in this document. The terminology for describing YANG data models can be found in [RFC7950].

3. 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            |
    +-------------+---------------------------+----------------------+
    | l1-types    | ietf-layer1-types         | This Document        |
    +-------------+---------------------------+----------------------+

4. Layer 1 Types Overview

4.1. Relationship with other Modules

This document defines one YANG module for common Layer 1 types. The aim is to specify common Layer 1 TE types (i.e. typedef, identity, grouping) that can be imported by layer 1 specific technology, for example OTN, in its technology-specific modules, such as topology and tunnels. It is worth noting that the generic traffic-engineering (TE) types module is specified in [RFC8776] as ietf-te-types, and both YANG modules, ietf-te-types and ietf-layer1-types, will need importing when the OTN is configured. Generic attributes such as te-bandwidth and te-label, are specified in ietf-te-types in [RFC8776], while the OTN-specific attributes, such as odu-type, are specified in ietf-layer1-types in this document.

4.2. Content in Layer 1 Type Module

The module ietf-layer1-types contains the following YANG reusable types and groupings:

tributary-slot-granularity:

This specifies the granularity of the server layer ODU Link (HO ODUk or ODUCn) supporting a client layer ODU LSP (LO ODUj or ODUk, respectively). Three granularities, 1.25G/2.5G/5G, have been specified.

odu-type:

This specifies the type of ODUk LSP, including the types specified in [RFC7139] and [RFC7963].

client-signal:

This specifies the client signal types of OTN networks. The initial input was the G-PID specified in [RFC7139]. Identities for some of the categories of client signal types, including ETH, STM-n, OC [ANSI] and Fiber Channel, have been specified.

otn-label-range-type:

The label range type of OTN is represented in one of two ways, tributary slots (TS) and tributary port number (TPN), as specified in [RFC7139]. Two representations are enumerated in the otn-label-range-type.

otn-link-bandwidth:

This grouping defines the link bandwidth information and could be used in OTN topology model for link bandwidth representation. All the bandwidth related sections in generic module, [RFC8776], need to be augmented with this grouping for the usage of Layer 1. The link bandwidth is represented by the number of ODUs that can be supported by the link for each ODU type as follow.


       +--:(otn)
          +--rw odulist* [odu-type]
             +--rw odu-type    identityref
             +--rw number?     uint16

For example, an OTN link with 100G bandwidth can support either 1xODU4, 10xODU2 or 80xODU0.

This grouping is also used to represent the ODUflex resources available on a link, as described in section Section 4.4.

otn-path-bandwidth:

This grouping defines the path bandwidth information and could be used in OTN topology model for path bandwidth representation. All the bandwidth related sections in generic module, [RFC8776], need to be augmented with this grouping for the usage of Layer 1. This grouping is also applicable when setting up the OTN tunnel. The path bandwidth is usually represented by the type of ODU (e.g., ODU0, ODU2, ODU4) being setup along the path as follow.


       +--:(otn)
          +--rw odu-type?                     identityref

In case of ODUflex paths, more information about the bandwidth of the ODUflex needs to be provided, as described in section Section 4.4.

otn-label-range-info:

This grouping is used to augment the label-restriction list, defined in [RFC8776], with OTN technology-specific attributes, as defined in section Section 4.3.


       +--rw range-type?      otn-label-range-type
       +--rw tsg?             identityref
       +--rw odu-type-list*   identityref
       +--rw priority?        uint8

otn-label-start-end:

This grouping is used to augment the label-start and label-end containers within the label-restriction list, defined in [RFC8776], with OTN technology-specific attributes, as defined in section Section 4.3.


       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    otn-ts

otn-label-step:

This grouping is used to augment the label-step container within the label-restriction list, defined in [RFC8776], with OTN technology-specific attributes, as defined in section Section 4.3.


       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    otn-ts

otn-label-hop:

This grouping is used to augment the label-hop container, defined in [RFC8776], with OTN technology-specific attributes, as defined in section Section 4.3.


       +--:(otn)
          +--rw otn-tpn?   otn-tpn
          +--rw tsg?       identityref
          +--rw ts-list?   string

optical-interface-func:

The optical interface function is specified in [MEF63]. Identities that describe the functionality are specified to encode bits for transmission and to decode bits upon reception.

4.3. OTN Label and Label Range

As described in [RFC7139], the OTN label usually represents the Tributary Port Number (TPN) and the related set of Tributary Slots (TS) assigned to a client layer ODU LSP (LO ODUj or ODUk) on a given server layer ODU (HO-ODU or ODUCn, respectively) Link (e.g., ODU2 LSP over ODU3 Link). Some special OTN label values are also defined for an ODUk LSP being set up over an OTUk Link.

The same OTN label must be assigned to the same ODUk LSP at the two ends of an OTN Link.

As described in [RFC7139], TPN can be a number from 1 to 4095 and TS are numbered from 1 to 4095, although the actual maximum values depend on the type of server layer ODU. For example, a server layer ODU4 provides 80 time slots (numbered from 1 to 80) and the TPN values can be any number from 1 to 80.

The OTN Label Range represents the values for the TPN and TS that are available for ODUk LSPs to be setup over a given OTN Link.

The OTN Label Range is defined by the label-restriction list, defined in [RFC8776], which, for OTN, should be augmented using the otn-label-range-info grouping.

Each entry in the label-restriction list represents either the range of the available TPN values or the range of the available TS values: the range-type attribute in the otn-label-range-info grouping defines the type of range for each entry of the list.

Each entry of the label-restriction list, as defined in [RFC8776], defines a label-start, a label-end, a label-step and a range-bitmap. The label-start and label-end definitions for OTN should be augmented using the otn-label-start-end grouping. The label-step definition for OTN should be augmented using the otn-label-step grouping. It is expected that the otn-label-step will always be equal to its default value (i.e., 1), which is defined in [RFC8776].

As described in [RFC7139], in some cases, the TPN assignment rules are flexible (e.g., ODU4 Link) while in other cases the TPN assignment rules are fixed (e.g., ODU1 Link). In the former case, both TPN and TS ranges are reported, while in the latter case, the TPN range is not reported which indicates that the TPN shall be set equal to the TS number assigned to the ODUk LSP.

As described in [RFC7139], in some cases, the TPN assignment rules depends on the TS Granularity (e.g., ODU2 or ODU3 Links). Different entries in the label-restriction list will report different TPN ranges for each TS granularity supported by the link, as indicated by the tsg attribute in the otn-label-range-info grouping.

As described in [RFC7139], in some cases the TPN ranges are different for different types of ODUk LSPs. For example, on an ODU2 Link with 1.25G TS granularity, the TPN range is 1-4 for ODU1 but 1-8 for ODU0 and ODUflex. Different entries in the label-restriction list will report different TPN ranges for different set of ODUk types, as indicated by the odu-type-list in the otn-label-range-info grouping.

Appendix A provides some examples of how the TPN and TS label ranges described in Table 3 and Table 4 of [RFC7139] can be represented in YANG using the groupings defined in this document.

4.4. ODUflex

ODUflex is a type of ODU which has a flexible bit rate which is configured when setting up an ODUflex LSP.

[ITU-Tg709], defines six types of ODUflex: ODUflex(CBR), ODUflex(GFP), ODUflex(GFP,n,k), ODUflex(IMP), ODUflex(IMP,s) and ODUflex(FlexE-aware).

The main difference between these types of ODUflex is the formula used to calculate the nominal bit rate of the ODUflex, as described in Table 7-2 of [ITU-Tg709]. A YANG choice has been defined to describe these cases:


       +--rw (oduflex-type)?
          +--:(generic)
          |  +--rw nominal-bit-rate        uint64
          +--:(cbr)
          |  +--rw client-type             identityref
          +--:(gfp-n-k)
          |  +--rw gfp-n                   uint8
          |  +--rw gfp-k?                  l1-types:gfp-k
          +--:(flexe-client)
          |  +--rw flexe-client
          |          l1-types:flexe-client-rate
          +--:(flexe-aware)
          |  +--rw flexe-aware-n           uint16
          +--:(packet)
             +--rw opuflex-payload-rate    uint64

The 'generic' case has been added to allow the ODUflex nominal bit rate to be defined independently from the type of ODUflex. This could be useful for forward compatibility in the transit domain/nodes where the setup of ODUflex LSPs does not depend on the ODUflex type.

In order to simplify interoperability the 'generic' case should be used only when it is needed; the ODUflex type-specific case should be used whenever possible.

The 'cbr' case is used for Constant Bit Rate (CBR) client signals. The client-type indicates which CBR client signal is carried by the ODUflex and, implicitly, the client signal bit rate which is then used to calculate the ODUflex(CBR) nominal bit rate as described in Table 7-2 of [ITU-Tg709].

The 'gfp-n-k' case is used for GFP-F mapped client signals based on ODUk.ts and 'n' 1.25G tributary slots. 'gfp-k' defines the nominal bit-rate of the ODUk.ts which, together with the value of 'gfp-n', is used to calculated the ODUflex(GFP,n,k) nominal bit rate as described in Table 7-8 and Table L-7 of [ITU-Tg709] . With a few exceptions, shown in Table L-7 of [ITU-Tg709], the nominal bit-rate of the ODUk.ts could be inferred from the value of 'n', as shown in Table 7-8 of [ITU-Tg709] and therefore the 'gfp-k' is optional.

The 'flexe-client' case is used for Idle Mapping Procedure(IMP) mapped FlexE client signals, The 'flexe-client' represents the type of FlexE client carried by the ODUflex which implicitly defines the value of 's' used to calculate the ODUflex(s) nominal bit rate as described in Table 7-2 of [ITU-Tg709]. The '10G' and '40G' enumeration values are used for 10G and 40G FlexE clients to implicitly define the values of s=2 and s=8. For the 'n x 25G' FlexE Clients the value of 'n' is used to defines the value of s=5 x n.

The 'flexe-aware' case is used for FlexE-aware client signals. The flexe-aware-n represents the value n (n = n1 + n2 + ... + np) which is used to calculate the ODUflex(FlexE-aware) nominal bit rate as described in Table 7-2 of [ITU-Tg709].

The 'packet' case is used for both the GFP-F mapped client signals and the IMP mapped client signals. The opuflex-payload-rate is either the GFP-F encapsulated-packet client nominal bit rate or the 64b/66b encoded-packet client nominal bit rate. The calculation of ODUflex(GFP) nominal bit rate is defined in section 12.2.5 of [ITU-Tg709], and the calculation of ODUflex(IMP) nominal bit rate is defined in section 12.2.6 of [ITU-Tg709]. The same formula is used in both cases.

Section 5.1 and 5.2 of [RFC7139] defines two rules to compute the number of tributary slots to be allocated to ODUflex(CBR) and ODUflex(GFP) LSPs when carried over a HO-ODUk link. According to section 19.6 of [ITU-Tg709], the rules in section 5.2 apply only to ODUflex(GFP,n,k) while the rules defined in section 5.1 apply to any other ODUflex type, including, but not limited, to ODUflex(CBR). Section 20.5 of [ITU-Tg709] defines the rules for computing the number of tributary slots to be allocated to ODUflex LSPs when carried over an ODUCn link.

Following the [ITU-Tg709] definitions, the rules defined for ODUflex(GFP,n,k) are used only when the 'gfp-n-k' case is used. In all the other cases, including the (generic) case, the rules defined any other ODUflex type are used.

The number of available ODUs, defined for each ODUk type, including ODUflex, together with the number of available time-slots, reported as part of the OTN label range, provide sufficient information to infer the OTN link bandwidth availability for ODUflex LSPs. This information is independent of the ODUflex type.

4.4.1. Resizable ODUflex

Resizable ODUflex is a special type of ODUflex that supports the procedures defined in [ITU-Tg7044] for hitless resizing of the ODUflex nominal bit rate.

Two odu-type identities have been defined for ODUflex:

  • The ODUflex identity, which is used with any type of non-resizable ODUflex, as defined in Table 7-2 of [ITU-Tg709].
  • The ODUflex-resizable identity, which is used only with resizable ODUflex(GFP,n,k).

These two identities are used to identify whether an ODUflex(GFP,n,k) LSP does or does support the [ITU-Tg7044] hitless resizing procedures. They also identify whether an OTN link only supports the setup of non-resizable ODUflex LSPs or also supports the setup of resizable ODUflex(GFP,n,k) LSP but with different capabilities (e.g., a lower number of LSPs).

5. YANG Code for Layer1 Types 

<CODE BEGINS>file "ietf-layer1-types@2021-02-19.yang"
module ietf-layer1-types {
  yang-version 1.1;
  namespace "urn:ietf:params:xml:ns:yang:ietf-layer1-types";
  prefix "l1-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: Italo Busi
             <mailto:Italo.Busi@huawei.com>";

  description
    "This module defines Layer 1 types. The model fully conforms
     to the Network Management Datastore Architecture (NMDA).

     Copyright (c) 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
     (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 "2021-02-19" {
    description
      "Initial Version";
    reference
      "RFC XXXX: A YANG Data Model for Layer 1 Types";
    // RFC Editor: replace XXXX with actual RFC number, update date
    // information and remove this note
  }

  /*
   * Typedefs
   */

  typedef otn-tpn {
    type uint16 {
      range "1..4095";
    }
    description
      "Tributary Port Number for OTN. ";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks.";
  }

  typedef otn-ts {
    type uint16 {
      range "1..4095";
    }
    description
      "Tributary Slot for OTN. ";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks.";
  }

  typedef otn-label-range-type {
    type enumeration {
      enum trib-slot {
        description
          "Defines a range of OTN tributary slots. ";
      }
      enum trib-port {
        description
          "Defines a range of OTN tributary ports. ";
      }
    }
    description
      "Defines the type of OTN label range: TS or TPN. ";
  }

  typedef gfp-k {
    type enumeration {
      enum 2 {
        description
          "The ODU2.ts rate (1,249,177.230 kbit/s) is used
           to compute the rate of an ODUflex(GFP,n,2). ";
      }
      enum 3 {
        description
          "The ODU3.ts rate (1,254,470.354 kbit/s) is used
           to compute the rate of an ODUflex(GFP,n,3). ";
      }
      enum 4 {
        description
          "The ODU4.ts rate (1,301,467.133 kbit/s) is used
           to compute the rate of an ODUflex(GFP,n,4). ";
      }
    }
    description
      "The ODUk.ts used to compute the rate of an ODUflex(GFP,n,k)";
    reference
      "ITU-T G.709 v6.0 (06/2020), Table 7-8 and L.7: Interfaces for
       the Optical Transport Network (OTN)";
  }

  typedef flexe-client-rate {
    type union {
      type uint16;
      type enumeration {
        enum "10G" {
          description
            "Represents a 10G FlexE Client signal (s=2)";
        }
        enum "40G" {
          description
            "Represents a 40G FlexE Client signal (s=8)";
        }
      }
    }
    description
      "The FlexE Client signal rate (s x 5,156,250.000 kbit/s)
       used to compute the rate of an ODUflex(IMP, s).
       Valid values for s are s=2 (10G), s=4 (40G) and
       s=5 x n (n x 25G).
       In the first two cases an enumeration value
       (either 10G or 40G) is used, while in the latter case
       the value of n is used";
    reference
      "ITU-T G.709 v6.0 (06/2020), Table 7-2: Interfaces for the
       Optical Transport Network (OTN)";
  }

  /*
   * Identities
   */

  identity tributary-slot-granularity {
    description
      "Tributary slot granularity";
    reference
      "ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
       Transport Network (OTN)";
  }

  identity tsg-1.25G {
    base tributary-slot-granularity;
    description
      "1.25G tributary slot granularity";
  }

  identity tsg-2.5G {
    base tributary-slot-granularity;
    description
      "2.5G tributary slot granularity";
  }

  identity tsg-5G {
    base tributary-slot-granularity;
    description
      "5G tributary slot granularity";
  }

  identity odu-type {
    description
      "Base identity from which specific ODU protocol is derived.";
  }

  identity ODU0 {
    base odu-type;
    description
      "ODU0 protocol (1.24Gb/s).";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks

       ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
       Transport Network (OTN)";
  }

  identity ODU1 {
    base odu-type;
    description
      "ODU1 protocol (2.49Gb/s).";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks

       ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
       Transport Network (OTN)";
  }

  identity ODU1e {
    base odu-type;
    description
      "ODU1e protocol (10.35Gb/s).";
    reference
      "RFC7963: RSVP-TE Extension for Additional Signal Types in
       G.709 Optical Transport Networks (OTNs)

       ITU-T G.sup43 v5.0 (02/2011): Transport of IEEE 10GBASE-R
       in optical transport networks (OTN)";
  }

  identity ODU2 {
    base odu-type;
    description
      "ODU2 protocol (10.03Gb/s).";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks

       ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
       Transport Network (OTN)";
  }

  identity ODU2e {
    base odu-type;
    description
      "ODU2e protocol (10.39Gb/s).";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks

       ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
       Transport Network (OTN)";
  }

  identity ODU3 {
    base odu-type;
    description
      "ODU3 protocol (40.31Gb/s).";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks

       ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
       Transport Network (OTN)";
  }

  identity ODU3e1 {
    base odu-type;
    description
      "ODU3e1 protocol (41.77Gb/s).";
    reference
      "RFC7963: RSVP-TE Extension for Additional Signal Types in
       G.709 Optical Transport Networks (OTNs)

       ITU-T G.sup43 v5.0 (02/2011): Transport of IEEE 10GBASE-R
       in optical transport networks (OTN)";
  }

  identity ODU3e2 {
    base odu-type;
    description
      "ODU3e2 protocol (41.78Gb/s).";
    reference
      "RFC7963: RSVP-TE Extension for Additional Signal Types in
       G.709 Optical Transport Networks (OTNs)

       ITU-T G.sup43 v5.0 (02/2011): Transport of IEEE 10GBASE-R
       in optical transport networks (OTN)";
  }

  identity ODU4 {
    base odu-type;
    description
      "ODU4 protocol (104.79Gb/s).";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks

       ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
       Transport Network (OTN)";
  }

  identity ODUflex {
    base odu-type;
    description
      "ODUflex protocol (flexibile bit rate, not resizable).

       It could be used for any type of ODUflex, including
       ODUflex(CBR), ODUflex(GFP), ODUflex(GFP,n,k), ODUflex(IMP,s),
       ODUflex(IMP) and ODUflex(FlexE-aware).";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks

       ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
       Transport Network (OTN)";
  }

  identity ODUflex-resizable {
    base odu-type;
    description
      "ODUflex protocol (flexibile bit rate, resizable).

       It could be used only for ODUflex(GFP,n,k).";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks

       ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
       Transport Network (OTN)";
  }

  identity protocol {
    description
      "Base identity from which specific protocol is derived.";
    reference
      "MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity Ethernet {
    base protocol;
    description
      "Ethernet protocol.";
    reference
      "MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity Fibre-Channel {
    base protocol;
    description
      "Fibre-Channel (FC) protocol.";
    reference
      "MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity SDH {
    base protocol;
    description
      "SDH protocol.";
    reference
      "MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity SONET {
    base protocol;
    description
      "SONET protocol.";
    reference
      "MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity client-signal {
    description
      "Base identity from which specific client signal is derived";
  }

  identity coding-func {
    description
      "Base identity from which specific coding function
       is derived.";
    reference
      "MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity ETH-1Gb {
    base client-signal;
    description
      "Client signal type of 1GbE";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks

       ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
       Transport Network (OTN)";
  }

  identity ETH-10Gb-LAN {
    base client-signal;
    description
      "Client signal type of ETH-10Gb-LAN (10.3 Gb/s)";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks

       ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
       Transport Network (OTN)

       IEEE 802.3-2018, Clause 49: IEEE Standard for Ethernet";
  }

  identity ETH-10Gb-WAN {
    base client-signal;
    description
      "Client signal type of ETH-10Gb-WAN (9.95 Gb/s)";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks

       ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
       Transport Network (OTN)

       IEEE 802.3-2018, Clause 50: IEEE Standard for Ethernet";
  }

  identity ETH-40Gb {
    base client-signal;
    description
      "Client signal type of 40GbE";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks

       ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
       Transport Network (OTN)";
  }

  identity ETH-100Gb {
    base client-signal;
    description
      "Client signal type of 100GbE";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks

       ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
       Transport Network (OTN)";
  }

  identity STM-1 {
    base client-signal;
    base coding-func;
    description
      "Client signal type of STM-1;
       STM-1 G.707 (N=1) coding function.";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks

       ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
       Transport Network (OTN)

       MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity STM-4 {
    base client-signal;
    base coding-func;
    description
      "Client signal type of STM-4;
       STM-4 G.707 (N=4) coding function.";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks

       ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
       Transport Network (OTN)

       MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity STM-16 {
    base client-signal;
    base coding-func;
    description
      "Client signal type of STM-16;
       STM-16 G.707 (N=16) coding function.";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks

       ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
       Transport Network (OTN)

       MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity STM-64 {
    base client-signal;
    base coding-func;
    description
      "Client signal type of STM-64;
       STM-64 G.707 (N=64) coding function.";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks

       ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
       Transport Network (OTN)

       MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity STM-256 {
    base client-signal;
    base coding-func;
    description
      "Client signal type of STM-256;
       STM-256 G.707 (N=256) coding function.";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks

       ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
       Transport Network (OTN)

       MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity OC-3 {
    base client-signal;
    base coding-func;
    description
      "Client signal type of OC3;
       OC-3 GR-253-CORE (N=3) coding function.";
    reference
      "ANSI T1.105-1995: Synchronous Optical Network (SONET)
       Basic Description including Multiplex Structure, Rates,
       and Formats

       MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity OC-12 {
    base client-signal;
    base coding-func;
    description
      "Client signal type of OC12;
       OC-12 GR-253-CORE (N=12) coding function.";
    reference
      "ANSI T1.105-1995: Synchronous Optical Network (SONET)
       Basic Description including Multiplex Structure, Rates,
       and Formats

       MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity OC-48 {
    base client-signal;
    base coding-func;
    description
      "Client signal type of OC48;
       OC-48 GR-253-CORE (N=48) coding function.";
    reference
      "ANSI T1.105-1995: Synchronous Optical Network (SONET)
       Basic Description including Multiplex Structure, Rates,
       and Formats

       MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity OC-192 {
    base client-signal;
    base coding-func;
    description
      "Client signal type of OC192;
       OC-192 GR-253-CORE (N=192) coding function.";
    reference
      "ANSI T1.105-1995: Synchronous Optical Network (SONET)
       Basic Description including Multiplex Structure, Rates,
       and Formats

       MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity OC-768 {
    base client-signal;
    base coding-func;
    description
      "Client signal type of OC768;
       OC-768 GR-253-CORE (N=768) coding function.";
    reference
      "ANSI T1.105-1995: Synchronous Optical Network (SONET)
       Basic Description including Multiplex Structure, Rates,
       and Formats

       MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity FC-100 {
    base client-signal;
    base coding-func;
    description
      "Client signal type of Fibre Channel FC-100;
       FC-100 FC-FS-2 (1.0625 Gb/s) coding function.";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks

       ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
       Transport Network (OTN)

       MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity FC-200 {
    base client-signal;
    base coding-func;
    description
      "Client signal type of Fibre Channel FC-200;
       FC-200 FC-FS-2 (2.125 Gb/s) coding function.";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks

       ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
       Transport Network (OTN)

       MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity FC-400 {
    base client-signal;
    base coding-func;
    description
      "Client signal type of Fibre Channel FC-400;
       FC-400 FC-FS-2 (4.250 Gb/s) coding function.";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks

       ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
       Transport Network (OTN)

       MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity FC-800 {
    base client-signal;
    base coding-func;
    description
      "Client signal type of Fibre Channel FC-800;
       FC-800 FC-FS-2 (8.500 Gb/s) coding function.";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks

       ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
       Transport Network (OTN)

       MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity FC-1200 {
    base client-signal;
    base coding-func;
    description
      "Client signal type of Fibre Channel FC-1200;
       FC-1200 FC-10GFC (10.51875 Gb/s) coding function.";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks

       ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
       Transport Network (OTN)

       MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity FC-1600 {
    base client-signal;
    base coding-func;
    description
      "Client signal type of Fibre Channel FC-1600;
       FC-1600 FC-FS-3 (14.025 Gb/s) coding function.";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks

       ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
       Transport Network (OTN)

       MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity FC-3200 {
    base client-signal;
    base coding-func;
    description
      "Client signal type of Fibre Channel FC-3200;
       FC-3200 FC-FS-4 (28.05 Gb/s) coding function.";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks

       ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
       Transport Network (OTN)

       MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity FICON-4G {
    base client-signal;
    description
      "Client signal type of Fibre Connection 4G";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks

       ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
       Transport Network (OTN)";
  }

  identity FICON-8G {
    base client-signal;
    description
      "Client signal type of Fibre Connection 8G";
    reference
      "RFC7139: GMPLS Signaling Extensions for Control of Evolving
       G.709 Optical Transport Networks

       ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
       Transport Network (OTN)";
  }

  identity ETH-1000X {
    base coding-func;
    description
      "1000BASE-X PCS clause 36 coding function.";
    reference
      "MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity ETH-10GW {
    base coding-func;
    description
      "10GBASE-W (WAN PHY) PCS clause 49 and WIS clause 50
       coding function.";
    reference
      "MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity ETH-10GR {
    base coding-func;
    description
      "10GBASE-R (LAN PHY) PCS clause 49 coding function.";
    reference
      "MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity ETH-40GR {
    base coding-func;
    description
      "40GBASE-R PCS clause 82 coding function.";
    reference
      "MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity ETH-100GR {
    base coding-func;
    description
      "100GBASE-R PCS clause 82 coding function.";
    reference
      "MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity optical-interface-func {
    description
      "Base identity from which optical-interface-function
       is derived.";
    reference
      "MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity SX-PMD-1000 {
    base optical-interface-func;
    description
      "SX-PMD-clause-38 Optical Interface function for
      1000BASE-X PCS-36";
    reference
      "MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity LX-PMD-1000 {
    base optical-interface-func;
    description
      "LX-PMD-clause-38 Optical Interface function for
       1000BASE-X PCS-36";
    reference
      "MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity LX10-PMD-1000 {
    base optical-interface-func;
    description
      "LX10-PMD-clause-59 Optical Interface function for
       1000BASE-X PCS-36";
    reference
      "MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity BX10-PMD-1000 {
    base optical-interface-func;
    description
      "BX10-PMD-clause-59 Optical Interface function for
       1000BASE-X PCS-36";
    reference
      "MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity LW-PMD-10G {
    base optical-interface-func;
    description
      "LW-PMD-clause-52 Optical Interface function for
       10GBASE-W PCS-49-WIS-50";
    reference
      "MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity EW-PMD-10G {
    base optical-interface-func;
    description
      "EW-PMD-clause-52 Optical Interface function for
       10GBASE-W PCS-49-WIS-50";
    reference
      "MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity LR-PMD-10G {
    base optical-interface-func;
    description
      "LR-PMD-clause-52 Optical Interface function for
       10GBASE-R PCS-49";
    reference
      "MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity ER-PMD-10G {
    base optical-interface-func;
    description
      "ER-PMD-clause-52 Optical Interface function for
       10GBASE-R PCS-49";
    reference
      "MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity LR4-PMD-40G {
    base optical-interface-func;
    description
      "LR4-PMD-clause-87 Optical Interface function for
       40GBASE-R PCS-82";
    reference
      "MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity ER4-PMD-40G {
    base optical-interface-func;
    description
      "ER4-PMD-clause-87 Optical Interface function for
       40GBASE-R PCS-82";
    reference
      "MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity FR-PMD-40G {
    base optical-interface-func;
    description
      "FR-PMD-clause-89 Optical Interface function for
       40GBASE-R PCS-82";
    reference
      "MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity LR4-PMD-100G {
    base optical-interface-func;
    description
      "LR4-PMD-clause-88 Optical Interface function for
       100GBASE-R PCS-82";
    reference
      "MEF63: Subscriber Layer 1 Service Attributes";
  }

  identity ER4-PMD-100G {
    base optical-interface-func;
    description
      "ER4-PMD-clause-88 Optical Interface function for
       100GBASE-R PCS-82";
    reference
      "MEF63: Subscriber Layer 1 Service Attributes";
  }

  /*
   * Groupings
   */

  grouping otn-link-bandwidth {
    description
      "Bandwidth attributes for OTN links";
    list odulist {
      key "odu-type";
      description
        "OTN bandwidth definition";
      leaf odu-type {
        type identityref {
          base odu-type;
        }
        description "ODU type";
      }
      leaf number {
        type uint16;
        description "Number of ODUs";
      }
    }
  }

  grouping otn-path-bandwidth {
    description
      "Bandwidth attributes for OTN paths.";
    container otn {
      description
        "Bandwidth attributes for OTN paths.";
      leaf odu-type {
        type identityref {
          base odu-type;
        }
        description "ODU type";
      }
      choice oduflex-type {
        when 'derived-from-or-self(./odu-type,"ODUflex") or
              derived-from-or-self(./odu-type,"ODUflex-resizable")'{
          description
            "Applicable when odu-type is ODUflex or
             ODUflex-resizable";
        }
        description
          "Types of ODUflex used to compute the ODUflex
           nominal bit rate.";
        reference
          "ITU-T G.709 v6.0 (06/2020), Table 7-2: Interfaces for the
           Optical Transport Network (OTN)";
        case generic {
          leaf nominal-bit-rate {
            type uint64;
            units "bps";
            mandatory true;
            description
              "Nominal ODUflex bit rate.";
          }
        }
        case cbr {
          leaf client-type {
            type identityref {
              base client-signal;
            }
            mandatory true;
            description
              "The CBR client signal for an ODUflex(CBR).";
          }
        }
        case gfp-n-k {
          leaf gfp-n {
            type uint8 {
              range "1..80";
            }
            mandatory true;
            description
              "The value of n for an ODUflex(GFP,n,k).";
            reference
              "ITU-T G.709 v6.0 (06/2020), Tables 7-8 and L.7:
               Interfaces for the Optical Transport Network (OTN)";
          }
          leaf gfp-k {
            type gfp-k;
            description
              "The value of k for an ODUflex(GFP,n,k).

               If omitted, it is calculated from the value of gfp-n
               as described in Table 7-8 of G.709";
            reference
              "ITU-T G.709 v6.0 (06/2020), Tables 7-8 and L.7:
               Interfaces for the Optical Transport Network (OTN)";
          }
        }
        case flexe-client {
          leaf flexe-client {
            type flexe-client-rate;
            mandatory true;
            description
              "The rate of the FlexE-client for an ODUflex(IMP,s).";
          }
        }
        case flexe-aware {
          leaf flexe-aware-n {
            type uint16;
            mandatory true;
            description
              "The rate of FlexE-aware client signal
               for ODUflex(FlexE-aware)";
          }
        }
        case packet {
          leaf opuflex-payload-rate {
            type uint64;
            units "Kbps";
            mandatory true;
            description
              "Either the GFP-F encapsulated packet client nominal
               bit rate for an ODUflex(GFP) or the 64b/66b encoded
               packet client nominal bit rate for an ODUflex(IMP).";
          }
        }
      }
    }
  }

  grouping otn-label-range-info {
    description
      "Label range information for OTN.

       This grouping should be used together with the
       otn-label-start-end and otn-label-step groupings to provide
       OTN technology-specific label information to the models which
       use the label-restriction-info grouping defined in the module
       ietf-te-types.";
    leaf range-type {
      type otn-label-range-type;
      description "The type of range (e.g., TPN or TS)
         to which the label range applies";
    }
    leaf tsg {
      type identityref {
        base tributary-slot-granularity;
      }
      description
        "Tributary slot granularity (TSG) to which the label range
         applies.

         This leaf shall be present when the range-type is TS.

         This leaf can be omitted when mapping an ODUk over an OTUk
         Link. In this case the range-type is tpn, with only one
         entry (ODUk), and the tpn range has only one value (1).";
      reference
        "ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
         Transport Network (OTN)";
    }
    leaf-list odu-type-list {
      type identityref {
        base odu-type;
      }
      description
        "List of ODU types to which the label range applies.

         An Empty odu-type-list means that the label range
         applies to all the supported ODU types.";
    }
    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)";
    }
  }

  grouping otn-label-start-end {
    description
      "The OTN label-start or label-end used to specify an OTN label
       range.

       This grouping is dependent on the range-type defined in the
       otn-label-range-info grouping.

       This grouping should be used together with the
       otn-label-range-info and otn-label-step groupings to provide
       OTN technology-specific label information to the models which
       use the label-restriction-info grouping defined in the module
       ietf-te-types.";
    choice range-type {
      description
        "OTN label range type, either TPN range or TS range";
      case trib-port {
        leaf otn-tpn {
          when "../../../range-type = 'trib-port'" {
            description
              "Valid only when range-type represented by trib-port";
          }
          type otn-tpn;
          description
            "Tributary Port Number.";
          reference
            "RFC7139: GMPLS Signaling Extensions for Control of
             Evolving G.709 Optical Transport Networks.";
        }
      }
      case trib-slot {
        leaf otn-ts {
          when "../../../range-type = 'trib-slot'" {
            description
              "Valid only when range-type represented by trib-slot";
          }
          type otn-ts;
          description
            "Tributary Slot Number.";
          reference
            "RFC7139: GMPLS Signaling Extensions for Control of
             Evolving G.709 Optical Transport Networks";
        }
      }
    }
  }

  grouping otn-label-hop {
    description "OTN Label";
    reference
      "RFC7139, section 6: GMPLS Signaling Extensions for Control of
       Evolving G.709 Optical Transport Networks";
    leaf otn-tpn {
      type otn-tpn;
      description
        "Tributary Port Number.";
      reference
        "RFC7139: GMPLS Signaling Extensions for Control of Evolving
         G.709 Optical Transport Networks.";
    }
    leaf tsg {
      type identityref {
        base tributary-slot-granularity;
      }
      description "Tributary slot granularity.";
      reference
        "ITU-T G.709 v6.0 (06/2020): Interfaces for the Optical
         Transport Network (OTN)";
    }
    leaf ts-list {
      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 available tributary slots ranging
         between 1 and 4095. If multiple values or
         ranges are given, they all must be disjoint
         and must be in ascending order.
         For example 1-20,25,50-1000.";
      reference
        "RFC 7139: GMPLS Signaling Extensions for Control
         of Evolving G.709 Optical Transport Networks";
    }
  }

  grouping otn-label-step {
    description
      "Label step for OTN.

       This grouping is dependent on the range-type defined in the
       otn-label-range-info grouping.

       This grouping should be used together with the
       otn-label-range-info and otn-label-start-end groupings to
       provide OTN technology-specific label information to the models
       which use the label-restriction-info grouping defined in the
       module ietf-te-types.";
    choice range-type {
      description
        "OTN label range type, either TPN range or TS range";
      case trib-port {
        leaf otn-tpn {
          when "../../range-type = 'trib-port'" {
            description
              "Valid only when range-type represented by trib-port";
          }
          type otn-tpn;
          description
            "Label step which represents possible increments for
             Tributary Port Number.";
          reference
            "RFC7139: GMPLS Signaling Extensions for Control of
             Evolving G.709 Optical Transport Networks.";
        }
      }
      case trib-slot {
        leaf otn-ts {
          when "../../range-type = 'trib-slot'" {
            description
              "Valid only when range-type represented by trib-slot";
          }
          type otn-ts;
          description
            "Label step which represents possible increments for
             Tributary Slot Number.";
          reference
            "RFC7139: GMPLS Signaling Extensions for Control of
             Evolving G.709 Optical Transport Networks.";
        }
      }
    }
  }
}

<CODE ENDS>

6. 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 or RESTCONF users to a preconfigured subset of all available NETCONF or RESTCONF protocol operations and content.

The YANG module in this document defines layer 1 type definitions (i.e., typedef, identity and grouping statements) in YANG data modeling language to be imported and used by other layer 1 technology-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.

7. 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-layer1-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-layer1-types
   namespace:    urn:ietf:params:xml:ns:yang:ietf-layer1-types
   prefix:       l1-types
   reference:    RFC XXXX

8. 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.

9. Contributors

Dieter Beller Nokia Email: dieter.beller@nokia.com

Sergio Belotti Nokia Email: sergio.belotti@nokia.com

Yanlei Zheng China Unicom Email: zhengyanlei@chinaunicom.cn

Aihua Guo Futurewei Technologies Email: aihuaguo@futurewei.com

Young Lee Samsung Email: younglee.tx@gmail.com

Lei Wang China Mobile Email: wangleiyj@chinamobile.com

Oscar Gonzalez de Dios Telefonica Email: oscar.gonzalezdedios@telefonica.com

Xufeng Liu Volta Networks Email: xufeng.liu.ietf@gmail.com

Yunbin Xu CAICT Email: xuyunbin@caict.ac.cn

Anurag Sharma Google Email: ansha@google.com

Rajan Rao Infinera Email: rrao@infinera.com

Victor Lopez Telefonica Email: victor.lopezalvarez@telefonica.com

Yunbo Li China Mobile Email: liyunbo@chinamobile.com

10. References

10.1. Normative References

[ANSI]
American National Standards Institute, "Synchronous Optical Network (SONET) Basic Description including Multiplex Structure, Rates, and Formats", ANSI T1.105, .
[IEEE]
Institute of Electrical and Electronics Engineers, "IEEE Standard for Ethernet", IEEE 802.3-2018, .
[ITU-Tg7044]
International Telecommunication Union, "Hitless adjustment of ODUflex(GFP)", ITU-T G.7044, .
[ITU-Tg709]
International Telecommunication Union, "Interfaces for the optical transport network", ITU-T G.709, .
[ITU-Tgsup43]
International Telecommunication Union, "Transport of IEEE 10GBASE-R in optical transport networks (OTN)", ITU-T G.sup43, .
[MEF63]
Metro Ethernet Forum, "Subscriber Layer1 Service Attributes Technical Specification", MEF 63, .
[RFC3688]
Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, DOI 10.17487/RFC3688, , <https://www.rfc-editor.org/info/rfc3688>.
[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, , <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, , <https://www.rfc-editor.org/info/rfc6241>.
[RFC6242]
Wasserman, M., "Using the NETCONF Protocol over Secure Shell (SSH)", RFC 6242, DOI 10.17487/RFC6242, , <https://www.rfc-editor.org/info/rfc6242>.
[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, , <https://www.rfc-editor.org/info/rfc7139>.
[RFC7950]
Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language", RFC 7950, DOI 10.17487/RFC7950, , <https://www.rfc-editor.org/info/rfc7950>.
[RFC7963]
Ali, Z., Bonfanti, A., Hartley, M., and F. Zhang, "RSVP-TE Extension for Additional Signal Types in G.709 Optical Transport Networks (OTNs)", RFC 7963, DOI 10.17487/RFC7963, , <https://www.rfc-editor.org/info/rfc7963>.
[RFC8040]
Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF Protocol", RFC 8040, DOI 10.17487/RFC8040, , <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, , <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, , <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, , <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, , <https://www.rfc-editor.org/info/rfc8776>.

10.2. Informative References

[I-D.ietf-ccamp-client-signal-yang]
Zheng, H., Guo, A., Busi, I., Snitser, A., Lazzeri, F., Xu, Y., Zhao, Y., Liu, X., and G. Fioccola, "A YANG Data Model for Transport Network Client Signals", Work in Progress, Internet-Draft, draft-ietf-ccamp-client-signal-yang-05, , <https://www.ietf.org/archive/id/draft-ietf-ccamp-client-signal-yang-05.txt>.
[I-D.ietf-ccamp-l1csm-yang]
Lee, Y., Lee, K., Zheng, H., Dios, O. G. D., and D. Ceccarelli, "A YANG Data Model for L1 Connectivity Service Model (L1CSM)", Work in Progress, Internet-Draft, draft-ietf-ccamp-l1csm-yang-14, , <https://www.ietf.org/archive/id/draft-ietf-ccamp-l1csm-yang-14.txt>.
[I-D.ietf-ccamp-otn-topo-yang]
Zheng, H., Busi, I., Liu, X., Belotti, S., and O. G. D. Dios, "A YANG Data Model for Optical Transport Network Topology", Work in Progress, Internet-Draft, draft-ietf-ccamp-otn-topo-yang-13, , <https://www.ietf.org/archive/id/draft-ietf-ccamp-otn-topo-yang-13.txt>.
[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-14, , <https://www.ietf.org/archive/id/draft-ietf-ccamp-otn-tunnel-model-14.txt>.
[I-D.ietf-ccamp-transport-nbi-app-statement]
Busi, I., King, D., Zheng, H., and Y. Xu, "Transport Northbound Interface Applicability Statement", Work in Progress, Internet-Draft, draft-ietf-ccamp-transport-nbi-app-statement-12, , <https://www.ietf.org/archive/id/draft-ietf-ccamp-transport-nbi-app-statement-12.txt>.
[RFC7062]
Zhang, F., Ed., Li, D., Li, H., Belotti, S., and D. Ceccarelli, "Framework for GMPLS and PCE Control of G.709 Optical Transport Networks", RFC 7062, DOI 10.17487/RFC7062, , <https://www.rfc-editor.org/info/rfc7062>.
[RFC7138]
Ceccarelli, D., Ed., Zhang, F., Belotti, S., Rao, R., and J. Drake, "Traffic Engineering Extensions to OSPF for GMPLS Control of Evolving G.709 Optical Transport Networks", RFC 7138, DOI 10.17487/RFC7138, , <https://www.rfc-editor.org/info/rfc7138>.
[RFC8792]
Watsen, K., Auerswald, E., Farrel, A., and Q. Wu, "Handling Long Lines in Content of Internet-Drafts and RFCs", RFC 8792, DOI 10.17487/RFC8792, , <https://www.rfc-editor.org/info/rfc8792>.

Appendix A. Examples of OTN Label Ranges

This appendix provides some examples of how the TPN and TS label ranges described in Table 3 and Table 4 of [RFC7139] can be represented in YANG using the groupings defined in this document.

It also considers the OTUk links in addition to HO-ODUk links.

The JSON code examples provided in this appendix provides some embedded comments following the conventions in section 3.2 of [I-D.ietf-ccamp-transport-nbi-app-statement] and have been folded using the tool in [RFC8792].


========== NOTE: '\\' line wrapping per BCP XXX (RFC XXXX) ==========

{
  "examples of label-restrictions for different OTN Links": [
    {
      "// ": "HO-ODU1 or OTU1 Link",
      "label-restrictions": {
        "label-restriction": [
          {
            "index ": 1,
            "// ___DEFAULT___ restriction": "inclusive",
            "range-type": "label-range-trib-port",
            "// ___NOT-PRESENT___ tsg": "",
            "odu-type-list": "[ ODU1 ]",
            "// ___DEFAULT___ priority": 7,
            "// tpn-range": 1,
            "// ___ COMMENT ___": "Since no TS range and no TSG are \
\reported for ODU1, the link is an OTU1 Link. TS allocation is not n\
\eeded and TPN shall be set to '1' for mapping ODU1 over OTU1. This \
\entry is not present if the OTN Link is an HO-ODU1 Link."
          },
          {
            "index ": 2,
            "// ___DEFAULT___ restriction": "inclusive",
            "range-type": "label-range-trib-slot",
            "tsg": "tsg-1.25G",
            "odu-type-list": "[ ODU0 ]",
            "// ts-range": "1-2",
            "// ___ COMMENT ___": "Since no TPN range is reportd for\
\ ODU0 with 1.25G TSG, the TPN allocation rule is fixed (TPN = TS#) \
\for mapping LO-ODU0 over HO-ODU1 with 1.25G TSG. See Table 4 of [RF\
\C7139]."
          }
        ]
      }
    },
    {
      "// ": "HO-ODU2 or OTU2 Link",
      "label-restrictions": {
        "label-restriction": [
          {
            "index ": 1,
            "// ___DEFAULT___ restriction": "inclusive",
            "range-type": "label-range-trib-port",
            "// ___NOT-PRESENT___ tsg": "",
            "odu-type-list": "[ ODU2 ]",
            "// ___ DEFAULT ___ priority": 7,
            "// tpn-range": 1,
            "// ___ COMMENT ___": "Since no TS range and no TSG are \
\reported for ODU2, the link is an OTU2 Link. TS allocation is not n\
\eeded and TPN shall be set to '1' for mapping ODU2 over OTU2. This \
\entry is not present if the OTN Link is an HO-ODU2 Link."
          },
          {
            "index ": 2,
            "// ___DEFAULT___ restriction": "inclusive",
            "range-type": "label-range-trib-slot",
            "tsg": "tsg-1.25G",
            "odu-type-list": "[ ODUFlex-cbr, ODUFlex-gfp, ODU0, ODU1\
\ ]",
            "// ___ DEFAULT ___ priority": 7,
            "// ts-range": "1-8"
          },
          {
            "index ": 3,
            "// ___DEFAULT___ restriction": "inclusive",
            "range-type": "label-range-trib-port",
            "tsg": "tsg-1.25G ",
            "odu-type-list": "[ ODUFlex-cbr, ODUFlex-gfp, ODU0 ]",
            "// ___ DEFAULT ___ priority": 7,
            "// tpn-range": "1-8",
            "// ___ COMMENT ___": "Since this TPN range is reported \
\for ODUflex and ODU0 with 1.25G TSG, the TPN assignment rule is fle\
\xible within a common range for mapping LO-ODUflex and LO-ODU0 over\
\ HO-ODU2 with 1.25G TSG. See Table 4 of [RFC7139]."
          },
          {
            "index ": 4,
            "// ___DEFAULT___ restriction": "inclusive",
            "range-type": "label-range-trib-port",
            "tsg": "tsg-1.25G",
            "odu-type-list": "[ ODU1 ]",
            "// ___ DEFAULT ___ priority": 7,
            "// tpn-range": "1-4",
            "// ___ COMMENT ___": "Since this TPN range is reported \
\for ODU1 with 1.25G TSG, the TPN assignment rule is flexible within\
\ a common range for mapping LO-ODU1 over HO-ODU2 with 1.25G TSG. Se\
\e Table 4 of [RFC7139]."
          },
          {
            "index ": 5,
            "// ___DEFAULT___ restriction": "inclusive",
            "range-type": "label-range-trib-slot",
            "tsg": "tsg-2.5G",
            "odu-type-list": "[ ODU1 ]",
            "// ___ DEFAULT ___ priority": 7,
            "// ts-range": "1-4",
            "// ___ COMMENT ___": "Since no TPN range is reported fo\
\r ODU1 with 2.5G TSG, the TPN allocation rule is fixed (TPN = TS#) \
\for mapping LO-ODU1 over HO-ODU2 with 2.5G TSG. See Table 3 of [RFC\
\7139]."
          }
        ]
      }
    },
    {
      "// ": "HO-ODU3 or OTU3 Link",
      "label-restrictions": {
        "label-restriction": [
          {
            "index ": 1,
            "// ___DEFAULT___ restriction": "inclusive",
            "range-type": "label-range-trib-port",
            "// ___NOT-PRESENT___ tsg": "",
            "odu-type-list": "[ ODU3 ]",
            "// ___ DEFAULT ___ priority": 7,
            "// tpn-range": 1,
            "// ___ COMMENT ___": "Since no TS range and no TSG are \
\reported for ODU3, the link is an OTU3 Link. TS allocation is not n\
\eeded and TPN shall be set to '1' for mapping ODU3 over OTU3. This \
\entry is not present if the OTN Link is an HO-ODU3 Link."
          },
          {
            "index ": 2,
            "// ___DEFAULT___ restriction": "inclusive",
            "range-type": "label-range-trib-slot",
            "tsg": "tsg-1.25G",
            "odu-type-list": "[ ODUFlex-cbr, ODUFlex-gfp, ODU0, ODU1\
\, ODU2, ODU2e ]",
            "// ___ DEFAULT ___ priority": 7,
            "// ts-range": "1-32"
          },
          {
            "index ": 3,
            "// ___DEFAULT___ restriction": "inclusive",
            "range-type": "label-range-trib-port",
            "tsg": "tsg-1.25G",
            "odu-type-list": "[ ODUFlex-cbr, ODUFlex-gfp, ODU0, ODU2\
\e ]",
            "// ___ DEFAULT ___ priority": 7,
            "// tpn-range": "1-32",
            "// ___ COMMENT ___": "Since this TPN range is reported \
\for ODUflex, ODU0 and ODU2e with 1.25G TSG, the TPN assignment rule\
\ is flexible within a common range for mapping LO-ODUflex, LO-ODU0 \
\and LO-ODU2e over HO-ODU3 with 1.25G TSG. See Table 4 of [RFC7139]."
          },
          {
            "index ": 4,
            "// ___DEFAULT___ restriction": "inclusive",
            "range-type": "label-range-trib-port",
            "tsg": "tsg-1.25G",
            "odu-type-list": "[ ODU1 ]",
            "// ___ DEFAULT ___ priority": 7,
            "// tpn-range": "1-16",
            "// ___ COMMENT ___": "Since this TPN range is reported \
\for ODU1 with 1.25G TSG, the TPN assignment rule is flexible within\
\ a common range for mapping LO-ODU1 over HO-ODU3 with 1.25G TSG. Se\
\e Table 4 of [RFC7139]."
          },
          {
            "index ": 5,
            "// ___DEFAULT___ restriction": "inclusive",
            "range-type": "label-range-trib-port",
            "tsg": "tsg-1.25G",
            "odu-type-list": "[ ODU2 ]",
            "// ___ DEFAULT ___ priority": 7,
            "// tpn-range": "1-4",
            "// ___ COMMENT ___": "Since this TPN range is reported \
\for ODU2 with 1.25G TSG, the TPN assignment rule is flexible within\
\ a common range for mapping LO-ODU2 over HO-ODU3 with 1.25G TSG. Se\
\e Table 4 of [RFC7139]."
          },
          {
            "index ": 6,
            "// ___DEFAULT___ restriction": "inclusive",
            "range-type": "label-range-trib-slot",
            "tsg": "tsg-2.5G",
            "odu-type-list": "[ ODU1, ODU2 ]",
            "// ___ DEFAULT ___ priority": 7,
            "// ts-range": "1-16"
          },
          {
            "index ": 7,
            "// ___DEFAULT___ restriction": "inclusive",
            "range-type": "label-range-trib-port",
            "tsg": "tsg-2.5G ",
            "odu-type-list": "[ ODU2 ]",
            "// ___ DEFAULT ___ priority": 7,
            "// tpn-range": "1-4",
            "// ___ COMMENT ___": "Since this TPN range is reported \
\for ODU2 with 2.5G TSG, the TPN assignment rule is flexible within \
\a common range for mapping LO-ODU2 over HO-ODU3. Since no TPN range\
\ is reported for ODU1 with 2.5G TSG, the TPN allocation rule is fix\
\ed (TPN = TS#) for mapping LO-ODU1 over HO-ODU3 with 2.5G TSG. See \
\Table 3 of [RFC7139]."
          }
        ]
      }
    },
    {
      "// ": "HO-ODU4 or OTU4 Link",
      "label-restrictions": {
        "label-restriction": [
          {
            "index ": 1,
            "// ___DEFAULT___ restriction": "inclusive",
            "range-type": "label-range-trib-port",
            "// ___NOT-PRESENT___ tsg": "",
            "odu-type-list": "[ ODU4 ]",
            "// ___ DEFAULT ___ priority": 7,
            "// tpn-range": 1,
            "// ___ COMMENT ___": "Since no TS range and no TSG are \
\reported for ODU4, the link is an OTU4 Link. TS allocation is not n\
\eeded and TPN shall be set to '1' for mapping ODU4 over OTU4. This \
\entry is not present if the OTN Link is an HO-ODU4 Link."
          },
          {
            "index ": 2,
            "// ___DEFAULT___ restriction": "inclusive",
            "range-type": "label-range-trib-slot",
            "tsg": "tsg-1.25G",
            "odu-type-list": "[ ODUFlex-cbr, ODUFlex-gfp, ODU0, ODU1\
\, ODU2, ODU2e, ODU3 ]",
            "// ___ DEFAULT ___ priority": 7,
            "// ts-range": "1-80"
          },
          {
            "index ": 3,
            "// ___DEFAULT___ restriction": "inclusive",
            "range-type": "label-range-trib-port",
            "tsg": "tsg-1.25G",
            "odu-type-list": "[ ODUFlex-cbr, ODUFlex-gfp, ODU0, ODU1\
\, ODU2, ODU2e, ODU3 ]",
            "// ___ DEFAULT ___ priority": 7,
            "// tpn-range": "1-80",
            "// ___ COMMENT ___": "Since this TPN range is reported \
\for any LO-ODUj with 1.25G TSG, the TPN assignment rule is flexible\
\ within a common range for mapping any LO-ODUj over HO-ODU4 with 1.\
\25G TSG. See Table 4 of [RFC7139]."
          }
        ]
      }
    },
    {
      "// ": "ODUC1 Link",
      "label-restrictions": {
        "label-restriction": [
          {
            "index ": 1,
            "// ___DEFAULT___ restriction": "inclusive",
            "range-type": "label-range-trib-slot",
            "tsg": "tsg-5G",
            "odu-type-list": "[ ODUFlex-cbr, ODUFlex-gfp, ODU0, ODU1\
\, ODU2, ODU2e, ODU3, ODU4 ]",
            "// ___ DEFAULT ___ priority": 7,
            "// ts-range": "1-20",
            "// ___ COMMENT ___": "Since the TS range is specified f\
\or any ODUk, the OTN Link is an ODUCn Link."
          },
          {
            "index ": 2,
            "// ___DEFAULT___ restriction": "inclusive",
            "range-type": "label-range-trib-port",
            "tsg": "tsg-5G",
            "odu-type-list": "[ ODUFlex-cbr, ODUFlex-gfp, ODU0, ODU1\
\, ODU2, ODU2e, ODU3, ODU4 ]",
            "// ___ DEFAULT ___ priority": 7,
            "// tpn-range": "1-10",
            "// ___ COMMENT ___": "Since this TPN range is reported \
\for any ODUk with 5G TSG, the TPN assignment rule is flexible withi\
\n a common range for mapping any ODUk over ODUCn with 5G TSG."
          }
        ]
      }
    }
  ]
}

Authors' Addresses

Haomian Zheng
Huawei Technologies
H1, Huawei Xiliu Beipo Village, Songshan Lake
Dongguan
Guangdong, 523808
China
Italo Busi
Huawei Technologies
Milan
Italy