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Versions: (draft-liu-bess-mvpn-yang) 00 01

BESS Working Group                                               Y. Liu
Internet Draft                                                   F. Guo
Intended status: Standards Track                    Huawei Technologies
Expires: September 6, 2019                                 S. Litkowski
                                                                 Orange
                                                                 X. Liu
                                                         Volta Networks
                                                              R. Kebler
                                                           M. Sivakumar
                                                       Juniper Networks
                                                          March 6, 2019


             Yang Data Model for Multicast in MPLS/BGP IP VPNs
                        draft-ietf-bess-mvpn-yang-01


Status of this Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on September 6, 2019.

Copyright Notice

   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
   (http://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



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   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.

Abstract

   This document defines a YANG data model that can be used to
   configure and manage multicast in MPLS/BGP IP VPNs.

Table of Contents


   1. Introduction ................................................ 2
      1.1. Terminology ............................................ 3
      1.2. Tree Diagrams .......................................... 4
      1.3. Prefixes in Data Node Names ............................ 4
   2. Design of Data model......................................... 4
      2.1. Scope of model ......................................... 4
      2.2. Optional capabilities .................................. 5
      2.3. Position of address family in hierarchy ................ 5
   3. Module Structure ............................................ 5
   4. MVPN YANG Modules .......................................... 12
   5. Security Considerations .................................... 32
   6. IANA Considerations ........................................ 32
   7. References ................................................. 32
      7.1. Normative References .................................. 32
      7.2. Informative References ................................ 33
   8. Acknowledgments ............................................ 34

1. Introduction

   YANG [RFC6020] [RFC7950] is a data definition language that was
   introduced to define the contents of a conceptual data store that
   allows networked devices to be managed using NETCONF [RFC6241].
   YANG is proving relevant beyond its initial confines, as bindings to
   other interfaces (e.g. REST) and encoding other than XML (e.g. JSON)
   are being defined.  Furthermore, YANG data models can be used as the
   basis of implementation for other interface, such as CLI and
   Programmatic APIs.

   This document defines a YANG data model that can be used to
   configure and manage Multicast in MPLS/BGP IP VPN (MVPN). It
   includes Cisco systems' solution [RFC6037], BGP MVPN [RFC6513]
   [RFC6514] etc.  This model will support the core MVPN protocols, as
   well as many other features mentioned in separate MVPN RFCs. In
   addition, Non-core features described in MVPN standards other than
   mentioned above RFC in separate documents.



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1.1. Terminology

   The terminology for describing YANG data models is found in
   [RFC6020] & [RFC7950].

   The following abbreviations are used in this document and the
   defined model:

   MVPN:

      Multicast Virtual Private Network [RFC6513].

   PMSI:

      P-Multicast Service Interface [RFC6513].

   PIM:

      Protocol Independent Multicast [RFC7761].

   SM:

      Sparse Mode [RFC7761].

   SSM:

      Source Specific Multicast [RFC4607].

   BIDIR-PIM:

      Bidirectional Protocol Independent Multicast [RFC5015].

   MLDP P2MP:

      Multipoint Label Distribution Protocol for Point to Multipoint
   [RFC6388].

   MLDP MP2MP:

      Multipoint Label Distribution Protocol for Multipoint to
   Multipoint [RFC6388].

   RSVP TE P2MP:

      Resource Reservation Protocol - Traffic Engineering for Point to
   Multipoint [RFC4875].

   BIER:



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      Bit Index Explicit Replication [RFC8279].

1.2. Tree Diagrams

   Tree diagrams used in this document follow the notation defined in
   [RFC8340].

1.3. Prefixes in Data Node Names

   In this document, names of data nodes, actions, and other data model
   objects are often used without a prefix, as long as it is clear from
   the context in which YANG module each name is defined.  Otherwise,
   names are prefixed using the standard prefix associated with the
   corresponding YANG module, as shown in Table 1



   +----------+---------------------------+----------------------------+

   | Prefix    | YANG module              | Reference                  |

   +-----------+--------------------------+----------------------------+

   | ni        | ietf-network-instance    | [I-D.ietf-ni-model]        |

   | l3vpn     | ietf-bgp-l3vpn           | [I-D.ietf-l3vpn-yang]      |

   | inet      | ietf-inet-types          | [RFC6991]                  |

   | rt-types  | ietf-routing-types       | [RFC8294]                  |

   | acl       | ietf-access-control-list | [I-D.ietf-acl-yang]        |

   +-----------+--------------------------+----------------------------+

           Table 1: Prefixes and Corresponding YANG Modules

2. Design of Data model

2.1. Scope of model

   The model covers Rosen MVPN [RFC6037], BGP MVPN [RFC6513] [RFC6514].
   The configuration of MVPN features, and the operational state fields
   and RPC definitions are not all included in this document of the
   data model. This model can be extended, though the structure of what
   has been written may be taken as representative of the structure of
   the whole model.




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   This model does not cover other MVPN related protocols such as MVPN
   Extranet [RFC7900] or MVPN MLDP In-band signaling [RFC7246] etc.,
   these will be specified in separate documents.

2.2. Optional capabilities

   This model is designed to represent the capabilities of MVPN devices
   with various specifications, including some with basic subsets of
   the MVPN protocols.  The main design goals of this document are that
   any major now-existing implementation may be said to support the
   basic model, and that the configuration of all implementations
   meeting the specification is easy to express through some
   combination of the features in the basic model and simple vendor
   augmentations.

   On the other hand, operational state parameters are not so widely
   designated as features, as there are many cases where the defaulting
   of an operational state parameter would not cause any harm to the
   system, and it is much more likely that an implementation without
   native support for a piece of operational state would be able to
   derive a suitable value for a state variable that is not natively
   supported.

   For the same reason, wide constant ranges (for example, timer
   maximum and minimum) will be used in the model.  It is expected that
   vendors will augment the model with any specific restrictions that
   might be required.  Vendors may also extend the features list with
   proprietary extensions.

2.3. Position of address family in hierarchy

   The current draft contains MVPN IPv4 and IPv6 as separate schema
   branches in the structure. The reason for this is to inherit l3vpn
   yang model structure and make it easier for implementations which
   may optionally choose to support specific address families. And the
   names of some objects may be different between the IPv4 and IPv6
   address families.

3. Module Structure

   The MVPN YANG model follows the Guidelines for YANG Module Authors
   (NMDA) [RFC8342]. The operational state data is combined with the
   associated configuration data in the same hierarchy [RFC8407]. The
   MVPN modules define for both IPv4 and IPv6 in a two-level hierarchy
   as listed below:

       Instance level: Only including configuration data nodes now. MVPN
   configuration attributes for the entire routing instance, including
   route-target, I-PMSI tunnel and S-PMSI number, common timer etc.


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       PMSI tunnel level: MVPN configuration attributes applicable to
   the I-PMSI and per S-PMSI tunnel configuration attributes, including
   tunnel mode, tunnel specific parameters and threshold etc. MVPN PMSI
   tunnel operational state attributes applicable to the I-PMSI and per
   S-PMSI tunnel operational state attributes, including tunnel mode,
   tunnel role, tunnel specific parameters and referenced private
   source and group address etc.

   Where fields are not genuinely essential to protocol operation, they
   are marked as optional. Some fields will be essential but have a
   default specified, so that they need not be configured explicitly.

   This MVPN model augments "/ni:network-instances/ni:network-
   instance/ni:ni-type/l3vpn:l3vpn/l3vpn:l3vpn/l3vpn:ipv4:" for IPv4
   MVPN service and "/ni:network-instances/ni:network-instance/ni:ni-
   type/l3vpn:l3vpn/l3vpn:l3vpn/l3vpn:ipv6" for IPv6 MVPN service
   specified in [I-D.ietf-l3vpn-yang].

augment /ni:network-instances/ni:network-instance/ni:ni-type
          /l3vpn:l3vpn/l3vpn:l3vpn/l3vpn:ipv4:
  +--rw multicast
     +--rw signaling-mode?            enumeration
     +--rw auto-discovery-mode?       enumeration
     +--rw mvpn-type?                 enumeration
     +--rw is-sender-site?            boolean {mvpn-sender}?
     +--rw rpt-spt-mode?              enumeration
     +--rw ecmp-load-balance-mode?
     |       enumeration {mvpn-ecmp-load-balance}?
     +--rw mvpn-route-targets {mvpn-separate-rt}?
     |  +--rw mvpn-route-target* [mvpn-rt-type mvpn-rt-value]
     |     +--rw mvpn-rt-type     enumeration
     |     +--rw mvpn-rt-value    string
     +--rw mvpn-ipmsi-tunnel-ipv4
     |  +--rw tunnel-type?                        p-tunnel
     |  +--rw (ipmsi-tunnel-attribute)?
     |  |  +--:(rsvp-te-p2mp)
     |  |  |  +--rw rsvp-te-p2mp-template?        string
     |  |  +--:(mldp-p2mp)
     |  |  +--:(pim-ssm)
     |  |  |  +--rw ssm-default-group-addr?
     |  |  |          rt-types:ip-multicast-group-address
     |  |  +--:(pim-sm)
     |  |  |  +--rw sm-default-group-addr?
     |  |  |          rt-types:ip-multicast-group-address
     |  |  +--:(bidir-pim)
     |  |  |  +--rw bidir-default-group-addr?
     |  |  |          rt-types:ip-multicast-group-address
     |  |  +--:(ingress-replication)
     |  |  +--:(mldp-mp2mp)


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     |  |  +--:(bier)
     |  |     +--rw inclusive-sub-domain-id?      uint8
     |  |     +--rw inclusive-bitstring-length?   uint16
     |  +--ro (pmsi-tunnel-state-attribute)?
     |  |  +--:(rsvp-te-p2mp)
     |  |  |  +--ro p2mp-id?                      uint16
     |  |  |  +--ro tunnel-id?                    uint16
     |  |  |  +--ro extend-tunnel-id?             uint16
     |  |  +--:(mldp-p2mp)
     |  |  |  +--ro mldp-root-addr?               inet:ip-address
     |  |  |  +--ro mldp-lsp-id?                  string
     |  |  +--:(pim-ssm)
     |  |  |  +--ro ssm-group-addr?
     |  |  |          rt-types:ip-multicast-group-address
     |  |  +--:(pim-sm)
     |  |  |  +--ro sm-group-addr?
     |  |  |          rt-types:ip-multicast-group-address
     |  |  +--:(bidir-pim)
     |  |  |  +--ro bidir-group-addr?
     |  |  |          rt-types:ip-multicast-group-address
     |  |  +--:(ingress-replication)
     |  |  +--:(mldp-mp2mp)
     |  |  +--:(bier)
     |  |     +--ro sub-domain-id?                uint8
     |  |     +--ro bitstring-length?             uint16
     |  |     +--ro bfir-id?                      uint16
     |  +--ro tunnel-role?                        enumeration
     |  +--ro upstream-vpn-label?
     |  |       rt-types:mpls-label {mvpn-aggregation-tunnel}?
     |  +--ro mvpn-pmsi-ipv4-ref-sg-entries
     |     +--ro mvpn-pmsi-ipv4-ref-sg-entries*
     |             [ipv4-source-address ipv4-group-address]
     |        +--ro ipv4-source-address    inet:ipv4-address
     |        +--ro ipv4-group-address
     |                rt-types:ipv4-multicast-group-address
     +--rw mvpn-spmsi-tunnels-ipv4
        +--rw switch-delay-time?           uint8
        +--rw switch-back-holddown-time?   uint16
        +--rw tunnel-limit?                uint16
        +--rw mvpn-spmsi-tunnel-ipv4* [tunnel-type]
           +--rw tunnel-type                          p-tunnel
           +--rw (spmsi-tunnel-attribute)?
           |  +--:(rsvp-te-p2mp)
           |  |  +--rw rsvp-te-p2mp-template?         string
           |  +--:(p2mp-mldp)
           |  +--:(pim-ssm)
           |  |  +--rw ssm-group-pool-addr?
           |  |  |       rt-types:ip-multicast-group-address
           |  |  +--rw ssm-group-pool-masklength?     uint8


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           |  +--:(pim-sm)
           |  |  +--rw sm-group-pool-addr?
           |  |  |       rt-types:ip-multicast-group-address
           |  |  +--rw sm-group-pool-masklength?      uint8
           |  +--:(bidir-pim)
           |  |  +--rw bidir-group-pool-addr?
           |  |  |       rt-types:ip-multicast-group-address
           |  |  +--rw bidir-group-pool-masklength?   uint8
           |  +--:(ingress-replication)
           |  +--:(mldp-mp2mp)
           |  +--:(bier)
           |     +--rw selective-sub-domain-id?       uint8
           |     +--rw selective-bitstring-length?    uint16
           +--rw switch-threshold?                    uint32
           +--rw per-item-tunnel-limit?               uint16
           +--rw switch-wildcard-mode?
           |       enumeration {mvpn-switch-wildcard}?
           +--rw explicit-tracking-mode?
           |       enumeration {mvpn-explicit-tracking}?
           +--rw (address-mask-or-acl)?
           |  +--:(address-mask)
           |  |  +--rw ipv4-group-addr?
           |  |  |       rt-types:ipv4-multicast-group-address
           |  |  +--rw ipv4-group-masklength?         uint8
           |  |  +--rw ipv4-source-addr?
           |  |  |       inet:ipv4-address
           |  |  +--rw ipv4-source-masklength?        uint8
           |  +--:(acl-name)
           |     +--rw group-acl-ipv4?
           |             -> /acl:acls/acl/name
           +--ro (pmsi-tunnel-state-attribute)?
           |  +--:(rsvp-te-p2mp)
           |  |  +--ro p2mp-id?                       uint16
           |  |  +--ro tunnel-id?                     uint16
           |  |  +--ro extend-tunnel-id?              uint16
           |  +--:(mldp-p2mp)
           |  |  +--ro mldp-root-addr?                inet:ip-address
           |  |  +--ro mldp-lsp-id?                   string
           |  +--:(pim-ssm)
           |  |  +--ro ssm-group-addr?
           |  |          rt-types:ip-multicast-group-address
           |  +--:(pim-sm)
           |  |  +--ro sm-group-addr?
           |  |          rt-types:ip-multicast-group-address
           |  +--:(bidir-pim)
           |  |  +--ro bidir-group-addr?
           |  |          rt-types:ip-multicast-group-address
           |  +--:(ingress-replication)
           |  +--:(mldp-mp2mp)


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           |  +--:(bier)
           |     +--ro sub-domain-id?                 uint8
           |     +--ro bitstring-length?              uint16
           |     +--ro bfir-id?                       uint16
           +--ro tunnel-role?                         enumeration
           +--ro upstream-vpn-label?
           |       rt-types:mpls-label {mvpn-aggregation-tunnel}?
           +--ro mvpn-pmsi-ipv4-ref-sg-entries
              +--ro mvpn-pmsi-ipv4-ref-sg-entries*
                      [ipv4-source-address ipv4-group-address]
                 +--ro ipv4-source-address    inet:ipv4-address
                 +--ro ipv4-group-address
                         rt-types:ipv4-multicast-group-address
augment /ni:network-instances/ni:network-instance/ni:ni-type
          /l3vpn:l3vpn/l3vpn:l3vpn/l3vpn:ipv6:
  +--rw multicast
     +--rw signaling-mode?            enumeration
     +--rw auto-discovery-mode?       enumeration
     +--rw mvpn-type?                 enumeration
     +--rw is-sender-site?            boolean {mvpn-sender}?
     +--rw rpt-spt-mode?              enumeration
     +--rw ecmp-load-balance-mode?
     |       enumeration {mvpn-ecmp-load-balance}?
     +--rw mvpn-route-targets {mvpn-separate-rt}?
     |  +--rw mvpn-route-target* [mvpn-rt-type mvpn-rt-value]
     |     +--rw mvpn-rt-type     enumeration
     |     +--rw mvpn-rt-value    string
     +--rw mvpn-ipmsi-tunnel-ipv6
     |  +--rw tunnel-type?                        p-tunnel
     |  +--rw (ipmsi-tunnel-attribute)?
     |  |  +--:(rsvp-te-p2mp)
     |  |  |  +--rw rsvp-te-p2mp-template?        string
     |  |  +--:(mldp-p2mp)
     |  |  +--:(pim-ssm)
     |  |  |  +--rw ssm-default-group-addr?
     |  |  |          rt-types:ip-multicast-group-address
     |  |  +--:(pim-sm)
     |  |  |  +--rw sm-default-group-addr?
     |  |  |          rt-types:ip-multicast-group-address
     |  |  +--:(bidir-pim)
     |  |  |  +--rw bidir-default-group-addr?
     |  |  |          rt-types:ip-multicast-group-address
     |  |  +--:(ingress-replication)
     |  |  +--:(mldp-mp2mp)
     |  |  +--:(bier)
     |  |     +--rw inclusive-sub-domain-id?      uint8
     |  |     +--rw inclusive-bitstring-length?   uint16
     |  +--ro (pmsi-tunnel-state-attribute)?
     |  |  +--:(rsvp-te-p2mp)


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     |  |  |  +--ro p2mp-id?                      uint16
     |  |  |  +--ro tunnel-id?                    uint16
     |  |  |  +--ro extend-tunnel-id?             uint16
     |  |  +--:(mldp-p2mp)
     |  |  |  +--ro mldp-root-addr?               inet:ip-address
     |  |  |  +--ro mldp-lsp-id?                  string
     |  |  +--:(pim-ssm)
     |  |  |  +--ro ssm-group-addr?
     |  |  |          rt-types:ip-multicast-group-address
     |  |  +--:(pim-sm)
     |  |  |  +--ro sm-group-addr?
     |  |  |          rt-types:ip-multicast-group-address
     |  |  +--:(bidir-pim)
     |  |  |  +--ro bidir-group-addr?
     |  |  |          rt-types:ip-multicast-group-address
     |  |  +--:(ingress-replication)
     |  |  +--:(mldp-mp2mp)
     |  |  +--:(bier)
     |  |     +--ro sub-domain-id?                uint8
     |  |     +--ro bitstring-length?             uint16
     |  |     +--ro bfir-id?                      uint16
     |  +--ro tunnel-role?                        enumeration
     |  +--ro upstream-vpn-label?
     |  |       rt-types:mpls-label {mvpn-aggregation-tunnel}?
     |  +--ro mvpn-pmsi-ipv6-ref-sg-entries
     |     +--ro mvpn-pmsi-ipv6-ref-sg-entries*
     |             [ipv6-source-address ipv6-group-address]
     |        +--ro ipv6-source-address    inet:ipv6-address
     |        +--ro ipv6-group-address
     |                rt-types:ipv6-multicast-group-address
     +--rw mvpn-spmsi-tunnels-ipv6
        +--rw switch-delay-time?           uint8
        +--rw switch-back-holddown-time?   uint16
        +--rw tunnel-limit?                uint16
        +--rw mvpn-spmsi-tunnel-ipv6* [tunnel-type]
           +--rw tunnel-type                          p-tunnel
           +--rw (spmsi-tunnel-attribute)?
           |  +--:(rsvp-te-p2mp)
           |  |  +--rw rsvp-te-p2mp-template?         string
           |  +--:(p2mp-mldp)
           |  +--:(pim-ssm)
           |  |  +--rw ssm-group-pool-addr?
           |  |          rt-types:ip-multicast-group-address
           |  |  +--rw ssm-group-pool-masklength?     uint8
           |  +--:(pim-sm)
           |  |  +--rw sm-group-pool-addr?
           |  |          rt-types:ip-multicast-group-address
           |  |  +--rw sm-group-pool-masklength?      uint8
           |  +--:(bidir-pim)


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           |  |  +--rw bidir-group-pool-addr?
           |  |          rt-types:ip-multicast-group-address
           |  |  +--rw bidir-group-pool-masklength?   uint8
           |  +--:(ingress-replication)
           |  +--:(mldp-mp2mp)
           |  +--:(bier)
           |     +--rw selective-sub-domain-id?       uint8
           |     +--rw selective-bitstring-length?    uint16
           +--rw switch-threshold?                    uint32
           +--rw per-item-tunnel-limit?               uint16
           +--rw switch-wildcard-mode?
           |       enumeration {mvpn-switch-wildcard}?
           +--rw explicit-tracking-mode?
           |       enumeration {mvpn-explicit-tracking}?
           +--rw (address-mask-or-acl)?
           |  +--:(address-mask)
           |  |  +--rw ipv6-group-addr?
           |  |  |       rt-types:ipv6-multicast-group-address
           |  |  +--rw ipv6-groupmasklength?          uint8
           |  |  +--rw ipv6-source-addr?
           |  |  |       inet:ipv6-address
           |  |  +--rw ipv6-source-masklength?        uint8
           |  +--:(acl-name)
           |     +--rw group-acl-ipv6?
           |             -> /acl:acls/acl/name
           +--ro (pmsi-tunnel-state-attribute)?
           |  +--:(rsvp-te-p2mp)
           |  |  +--ro p2mp-id?                       uint16
           |  |  +--ro tunnel-id?                     uint16
           |  |  +--ro extend-tunnel-id?              uint16
           |  +--:(mldp-p2mp)
           |  |  +--ro mldp-root-addr?                inet:ip-address
           |  |  +--ro mldp-lsp-id?                   string
           |  +--:(pim-ssm)
           |  |  +--ro ssm-group-addr?
           |  |          rt-types:ip-multicast-group-address
           |  +--:(pim-sm)
           |  |  +--ro sm-group-addr?
           |  |          rt-types:ip-multicast-group-address
           |  +--:(bidir-pim)
           |  |  +--ro bidir-group-addr?
           |  |          rt-types:ip-multicast-group-address
           |  +--:(ingress-replication)
           |  +--:(mldp-mp2mp)
           |  +--:(bier)
           |     +--ro sub-domain-id?                 uint8
           |     +--ro bitstring-length?              uint16
           |     +--ro bfir-id?                       uint16
           +--ro tunnel-role?                         enumeration


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           +--ro upstream-vpn-label?
           |       rt-types:mpls-label {mvpn-aggregation-tunnel}?
           +--ro mvpn-pmsi-ipv6-ref-sg-entries
              +--ro mvpn-pmsi-ipv6-ref-sg-entries*
                      [ipv6-source-address ipv6-group-address]
                 +--ro ipv6-source-address    inet:ipv6-address
                 +--ro ipv6-group-address
                         rt-types:ipv6-multicast-group-address


4. MVPN YANG Modules

   <CODE BEGINS> file "ietf-mvpn@2019-03-05.yang"
   module ietf-mvpn {
      yang-version 1.1;
      namespace "urn:ietf:params:xml:ns:yang:ietf-mvpn";
      prefix mvpn;

      import ietf-network-instance {
        prefix ni;
      }

      import ietf-bgp-l3vpn {
        prefix l3vpn;
      }

      import ietf-inet-types {
        prefix inet;
      }

      import ietf-routing-types {
        prefix rt-types;
      }

      import ietf-access-control-list {
        prefix acl;
      }

      organization
        "IETF BESS(BGP Enabled Services) Working Group";
      contact
        "
        Yisong Liu
        <mailto:liuyisong@huawei.com>
        Stephane Litkowski
        <mailto:stephane.litkowski@orange.com>
        Feng Guo
        <mailto:guofeng@huawei.com>
        Xufeng Liu


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        <mailto:xufeng.liu.ietf@gmail.com>
        Robert Kebler
        <mailto:rkebler@juniper.net>
        Mahesh Sivakumar
        <mailto:sivakumar.mahesh@gmail.com>";
      description
        "This YANG module defines the generic configuration
         and operational state data for mvpn, which is common across
         all of the vendor implementations of the protocol. It is
         intended that the module will be extended by vendors to
         define vendor-specific mvpn parameters.";

      revision 2019-03-05 {
        description
          "Add bier as a type of P-Tunnel and Errata.";
        reference
          "RFC XXXX: A YANG Data Model for MVPN";
      }
      revision 2018-11-08 {
        description
          "Update for leaf type and reference.";
        reference
          "RFC XXXX: A YANG Data Model for MVPN";
      }
      revision 2018-05-10 {
        description
          "Update for Model structure and errata.";
        reference
          "RFC XXXX: A YANG Data Model for MVPN";
      }
      revision 2017-09-15 {
        description
          "Update for NMDA version and errata.";
        reference
          "RFC XXXX: A YANG Data Model for MVPN";
      }
      revision 2017-07-03 {
        description
          "Update S-PMSI configuration and errata.";
        reference
          "RFC XXXX: A YANG Data Model for MVPN";
      }
      revision 2016-10-28 {
        description
          "Initial revision.";
        reference
          "RFC XXXX: A YANG Data Model for MVPN";
      }



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      /* Features */
      feature mvpn-sender {
        description
          "Support configuration to specify the current PE as the
           sender PE";
      }
      feature mvpn-separate-rt {
        description
          "Support route-targets configuration of MVPN when they are
           different from the route-targets of unicast L3VPN.";
      }
      feature mvpn-switch-wildcard {
        description
          "Support configuration to use wildcard mode when multicast
           packets switch from I-PMSI to S-PMSI.";
      }
      feature mvpn-explicit-tracking {
        description
          "Support configuration to use explicit tracking for leaf PEs
           when multicast packets forward by I-PMSI or S-PMSI.";
      }
      feature mvpn-aggregation-tunnel {
        description
          "Support more than one VPN multicast service to use the same
           p-tunnel.";
      }
      feature mvpn-ecmp-load-balance {
        description
          "Support multicast entries in the private network to be
           distributed on the ECMP path of bier in the public network.";
      }

      typedef p-tunnel {
        type enumeration {
          enum no-tunnel-present {
            value 0;
            description "No tunnel information present";
          }
          enum rsvp-te-p2mp {
            value 1;
            description "RSVP TE P2MP tunnel";
          }
          enum mldp-p2mp {
            value 2;
            description "MLDP P2MP tunnel";
          }
          enum pim-ssm {
            value 3;
            description "PIM SSM tree in public net";


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          }
          enum pim-sm {
            value 4;
            description "PIM SM tree in public net";
          }
          enum bidir-pim {
            value 5;
            description "BIDIR-PIM tree in public net";
          }
          enum ingress-replication {
            value 6;
            description "Ingress Replication p2p tunnel.";
          }
          enum mldp-mp2mp {
            value 7;
            description "MLDP MP2MP tunnel";
          }
          enum bier {
            value 11;
            description "bier underlay";
          }
        }
        description "Provider tunnel type definition.";
      }

      grouping mvpn-instance-config {
        description "Mvpn basic configuration per instance.";

        leaf signaling-mode {
          type enumeration {
            enum none {
              value 0;
              description "No signaling";
            }
            enum bgp {
              value 1;
              description "bgp signaling";
            }
            enum pim {
              value 2;
              description "pim signaling";
            }
            enum mldp-in-band {
              value 3;
              description "mldp in-band signaling";
            }
          }
          default "none";
          description "Signaling mode for C-multicast route.";


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        }
        leaf auto-discovery-mode {
          type enumeration {
            enum none {
              value 0;
              description "no auto-discovery signaling";
            }
            enum pim {
              value 1;
              description "auto-discovery by PIM signaling";
            }
            enum bgp {
              value 2;
              description "auto-discovery by BGP signaling";
            }
          }
          default "none";
          description "Auto discovery mode of MVPN PE members.";
        }
        leaf mvpn-type {
          type enumeration {
            enum rosen-mvpn {
              value 0;
              description "Rosen mvpn mode referenced RFC6037";
            }
            enum ng-mvpn {
              value 1;
              description
                "BGP/MPLS mvpn mode referenced RFC6513&RFC6514";
            }
          }
          default "ng-mvpn";
          description
            "Mvpn type, which can be rosen mvpn mode or ng mvpn mode.";
        }
        leaf is-sender-site {
          if-feature mvpn-sender;
          type boolean;
          default false;
          description "Configure the current PE as a sender PE.";
        }
        leaf rpt-spt-mode {
          type enumeration {
            enum spt-only {
              value 0;
              description
                "Only spt entries can cross the public net.";
            }
            enum rpt-spt {


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              value 1;
              description
                "Both rpt and spt entries can corss the public net.";
            }
          }
          description
            "ASM mode in multicast private network for crossing
             public net.";
        }
        leaf ecmp-load-balance-mode {
          if-feature mvpn-ecmp-load-balance;
          type enumeration {
            enum none {
              value 0;
              description
                "No load balancing for multicast entries.";
            }
            enum source {
              value 1;
              description
                "Load balancing based on multicast source address.";
            }
            enum group {
              value 2;
              description
                "Load balancing based on multicast group address.";
            }
            enum source-group {
              value 3;
              description
                "Load balancing based on multicast source and group
                 address.";
            }
          }
          description
            "Distribution mode of multicast entries in the private
             network on the ECMP path of bier in the public network.";
        }
      }/* mvpn-instance-config */

      grouping mvpn-rts {
        description
          "May be different from l3vpn unicast route-targets.";
        container mvpn-route-targets{
          if-feature mvpn-separate-rt;
          description "Multicast vpn route-targets";
          list mvpn-route-target {
            key "mvpn-rt-type mvpn-rt-value" ;
            description


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              "List of multicast route-targets" ;
            leaf mvpn-rt-type {
              type enumeration {
                 enum export-extcommunity {
                   value 0;
                   description "export-extcommunity";
                 }
                 enum import-extcommunity {
                   value 1;
                   description "import-extcommunity";
                 }
              }
              description
                 "rt types are as follows:
                  export-extcommunity: specifies the value of
                  the extended community attribute of the
                  route from an outbound interface to the
                  destination vpn.
                  import-extcommunity: receives routes that
                  carry the specified extended community
                  attribute";
            }
            leaf mvpn-rt-value {
              type string {
                length "3..21";
              }
              description
                 "the available mvpn target formats are as
                  follows:
                  - 16-bit as number:32-bit user-defined
                  number, for example, 1:3. an as number
                  ranges from 0 to 65535, and a user-defined
                  number ranges from 0 to 4294967295. The as
                  number and user-defined number cannot be
                  both 0s. That is, a vpn target cannot be 0:0.
                  - 32-bit ip address:16-bit user-defined
                  number, for example, 192.168.122.15:1.
                  The ip address ranges from 0.0.0.0 to
                  255.255.255.255, and the user-defined
                  number ranges from 0 to 65535.";
            }
          }
        }
      }

      grouping mvpn-ipmsi-tunnel-config {
        description
          "Configuration of default mdt for rosen mvpn
           and I-PMSI for ng mvpn";


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        leaf tunnel-type {
          type p-tunnel;
          description "I-PMSI tunnel type.";
        }
        choice ipmsi-tunnel-attribute {
          description "I-PMSI tunnel attributes configuration";
          case rsvp-te-p2mp {
            description "RSVP TE P2MP tunnel";
            leaf rsvp-te-p2mp-template {
              type string {
                length "1..31";
              }
              description "RSVP TE P2MP tunnel template";
            }
          }
          case mldp-p2mp {
            description "MLDP P2MP tunnel";
          }
          case pim-ssm {
            description "PIM SSM tree in the public net";
            leaf ssm-default-group-addr {
              type rt-types:ip-multicast-group-address;
              description
                "Default mdt or I-PMSI group address for SSM mode.";
            }
          }
          case pim-sm {
            description "PIM SM tree in the public net";
            leaf sm-default-group-addr {
              type rt-types:ip-multicast-group-address;
              description
                "Default mdt or I-PMSI group address for SM mode.";
            }
          }
          case bidir-pim {
            description "BIDIR PIM tree in the public net";
            leaf bidir-default-group-addr {
              type rt-types:ip-multicast-group-address;
              description
                "Default mdt or I-PMSI group address for BIDIR mode.";
            }
          }
          case ingress-replication {
            description "Ingress replication p2p tunnel";
          }
          case mldp-mp2mp {
            description "MLDP MP2MP tunnel";
          }


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          case bier {
            description "bier underlay";
            leaf inclusive-sub-domain-id {
              type uint8;
              description "Subdomain ID of bier.";
            }
            leaf inclusive-bitstring-length {
               type uint16 {
                 range "64|128|256|512|1024|2048|4096";
               }
               description "BitString length of bier underlay.";
            }
          }
        }
      }/* mvpn-ipmsi-tunnel-config */

      grouping mvpn-spmsi-tunnel-per-item-config {
        description "S-PMSI tunnel basic configuration";
        leaf tunnel-type {
          type p-tunnel;
          description "S-PMSI tunnel type.";
        }
        choice spmsi-tunnel-attribute {
          description "S-PMSI tunnel attributes configuration";
          case rsvp-te-p2mp {
            description "RSVP TE P2MP tunnel";
            leaf rsvp-te-p2mp-template {
              type string {
                length "1..31";
              }
              description "RSVP TE P2MP tunnel template";
            }
          }
          case p2mp-mldp {
            description "MLDP P2MP tunnel";
          }
          case pim-ssm {
            description "PIM SSM tree in the public net";
            leaf ssm-group-pool-addr {
              type rt-types:ip-multicast-group-address;
              description
                "Group pool address for data mdt or s-pmsi in SSM mode";
            }
            leaf ssm-group-pool-masklength {
              type uint8 {
                range "8..128";
              }
              description
                "Group pool mask length for data mdt or s-pmsi in


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                 SSM mode";
            }
          }
          case pim-sm {
            description "PIM SM tree in the public net";
            leaf sm-group-pool-addr {
              type rt-types:ip-multicast-group-address;
              description
                "Group pool address for data mdt or s-pmsi in SM mode";
            }
            leaf sm-group-pool-masklength {
              type uint8 {
                range "8..128";
              }
              description
                "Group pool mask length for data mdt or s-pmsi in
                 SM mode";
            }
          }
          case bidir-pim {
            description "BIDIR PIM tree in the public net";
            leaf bidir-group-pool-addr {
              type rt-types:ip-multicast-group-address;
              description
                "Group pool address for data mdt or s-pmsi in
                 BIDIR mode";
            }
            leaf bidir-group-pool-masklength {
              type uint8 {
                range "8..128";
              }
              description
                "Group pool mask length for data mdt or s-pmsi in
                 BIDIR mode";
            }
          }
          case ingress-replication {
            description "Ingress replication p2p tunnel";
          }
          case mldp-mp2mp {
            description "MLDP MP2MP tunnel";
          }
          case bier {
            description "bier underlay";
            leaf selective-sub-domain-id {
              type uint8;
              description "Subdomain ID of bier.";
            }
            leaf selective-bitstring-length {


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               type uint16 {
                 range "64|128|256|512|1024|2048|4096";
               }
               description "BitString length of bier underlay.";
            }
          }
        }
        leaf switch-threshold {
          type uint32 {
            range "0..4194304";
          }
          units kbps;
          default 0;
          description
            "Multicast packet rate threshold for
             triggering the switching from the
             I-PMSI to the S-PMSI. The value is
             an integer ranging from 0 to 4194304, in
             kbps. The default value is 0.";
        }
        leaf per-item-tunnel-limit {
          type uint16 {
            range "1..1024";
          }
          description
            "Maximum number of S-PMSI tunnels allowed
             per S-PMSI configuration item per mvpn instance.";
        }
        leaf switch-wildcard-mode {
          if-feature mvpn-switch-wildcard;
          type enumeration {
            enum source-group {
              value 0;
              description
                "Wildcard neither for source or group address.";
            }
            enum star-star {
              value 1;
              description
                "Wildcard for both source and group address.";
            }
            enum star-group {
              value 2;
              description
                "Wildcard only for source address.";
            }
            enum source-star {
              value 3;
              description


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                "Wildcard only for group address.";
            }
          }
          description
            "I-PMSI switching to S-PMSI mode for private net
            wildcard mode, which including (*,*), (*,G), (S,*),
            (S,G) four modes.";
        }
        leaf explicit-tracking-mode {
          if-feature mvpn-explicit-tracking;
          type enumeration {
            enum no-leaf-info-required {
              value 0;
              description "No need to track leaf information.";
            }
            enum leaf-info-required  {
              value 1;
              description "Need to track leaf information.";
            }
            enum leaf-info-required-per-flow {
              value 2;
              description
                "Need to track leaf information based on
                 per multicast flow.";
            }
          }
          description "Tracking mode for leaf information.";
        }
      }/* mvpn-spmsi-tunnel-per-item-config */

      grouping mvpn-spmsi-tunnel-common-config {
        description
          "Data mdt for rosen mvpn or S-PMSI for ng mvpn configuration
           attributes for both IPv4 and IPv6 private network";
        leaf switch-delay-time {
          type uint8 {
            range "3..60";
          }
          units seconds;
          default 5;
          description
            "Delay for switching from the I-PMSI to
             the S-PMSI. The value is an integer
             ranging from 3 to 60, in seconds. ";
        }
        leaf switch-back-holddown-time {
          type uint16 {
            range "0..512";
          }


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          units seconds;
          default 60;
          description
            "Delay for switching back from the S-PMSI
             to the I-PMSI. The value is an integer
             ranging from 0 to 512, in seconds. ";
        }
        leaf tunnel-limit {
          type uint16 {
            range "1..8192";
          }
          description
            "Maximum number of s-pmsi tunnels allowed
             per mvpn instance.";
        }
      }/* mvpn-spmsi-tunnel-common-config */

      grouping mvpn-pmsi-state {
        description "PMSI tunnel operational state information";

        choice pmsi-tunnel-state-attribute {
          config false;
          description
            "PMSI tunnel operational state information for each type";
          case rsvp-te-p2mp {
            description "RSVP TE P2MP tunnel";
            leaf p2mp-id {
              type uint16 {
                range "0..65535";
              }
              description "P2MP ID of the RSVP TE P2MP tunnel";
            }
            leaf tunnel-id {
              type uint16 {
                range "1..65535";
              }
              description "Tunnel ID of the RSVP TE P2MP tunnel";
            }
            leaf extend-tunnel-id {
              type uint16 {
                range "1..65535";
              }
              description
                "Extended tunnel ID of the RSVP TE P2MP Tunnel";
            }
          }
          case mldp-p2mp {
            description "MLDP P2MP tunnel";
            leaf mldp-root-addr {


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              type inet:ip-address;
              description "IP address of the root of a MLDP P2MP lsp.";
            }
            leaf mldp-lsp-id {
              type string {
                length "1..256";
              }
              description "MLDP P2MP lsp ID.";
            }
          }
          case pim-ssm {
            description "PIM SSM tree in the public net";
            leaf ssm-group-addr {
              type rt-types:ip-multicast-group-address;
              description "Group address for pim ssm";
            }
          }
          case pim-sm {
            description "PIM SM tree in the public net";
            leaf sm-group-addr {
              type rt-types:ip-multicast-group-address;
              description "Group address for pim sm";
            }
          }
          case bidir-pim {
            description "BIDIR PIM tree in the public net";
            leaf bidir-group-addr {
              type rt-types:ip-multicast-group-address;
              description "Group address for bidir-pim";
            }
          }
          case ingress-replication {
            description "Ingress replication p2p tunnel";
          }
          case mldp-mp2mp {
            description "MLDP MP2MP tunnel";
          }
          case bier {
            description "bier underlay";
            leaf sub-domain-id {
              type uint8;
              description "Subdomain ID of bier.";
            }
            leaf bitstring-length {
               type uint16 {
                 range "64|128|256|512|1024|2048|4096";
               }
               description "BitString length of bier underlay.";
            }


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            leaf bfir-id {
              type uint16;
              description "ID of BIER sender PE of MVPN.";
            }
          }
        }
        leaf tunnel-role {
          type enumeration {
            enum none {
              value 0;
              description "none";
            }
            enum root {
              value 1;
              description "root";
            }
            enum leaf {
              value 2;
              description "leaf";
            }
            enum root-and-leaf {
              value 3;
              description "root-and-leaf";
            }
          }
          config false;
          description "Role of a node for a p-tunnel.";
        }
        leaf upstream-vpn-label {
          if-feature mvpn-aggregation-tunnel;
          type rt-types:mpls-label;
          config false;
          description
          "VPN context label for the multicast data of the VPN instance
           in an aggregation P-tunnel.";
        }
      }/* mvpn-pmsi-state */

      grouping mvpn-pmsi-ipv4-entry {
        description
          "Multicast entries in ipv4 mvpn referenced the pmsi tunnel";
        container mvpn-pmsi-ipv4-ref-sg-entries {
          config false;
          description
            "Multicast entries in ipv4 mvpn referenced the pmsi tunnel";
          list mvpn-pmsi-ipv4-ref-sg-entries {
            key "ipv4-source-address ipv4-group-address";
            description
              "IPv4 source and group address of private network entry";


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            leaf ipv4-source-address {
              type inet:ipv4-address;
              description
                "IPv4 source address of private network entry
                 in I-PMSI or S-PMSI.";
            }
            leaf ipv4-group-address {
              type rt-types:ipv4-multicast-group-address;
              description
                "IPv4 group address of private network entry
                 in I-PMSI or S-PMSI.";
            }
          }
        }
      }/* mvpn-pmsi-ipv4-entry */


      grouping mvpn-pmsi-ipv6-entry {
        description
          "Multicast entries in ipv6 mvpn referenced the pmsi tunnel";
        container mvpn-pmsi-ipv6-ref-sg-entries {
          config false;
          description
            "Multicast entries in ipv6 mvpn referenced the pmsi tunnel";
          list mvpn-pmsi-ipv6-ref-sg-entries {
            key "ipv6-source-address ipv6-group-address";
            description
              "IPv6 source and group address of private network entry";
            leaf ipv6-source-address {
              type inet:ipv6-address;
              description
                "IPv6 source address of private network entry
                 in I-PMSI or S-PMSI.";
            }
            leaf ipv6-group-address {
              type rt-types:ipv6-multicast-group-address;
              description
                "IPv6 group address of private network entry
                 in I-PMSI or S-PMSI.";
            }
          }
        }
      }/* mvpn-pmsi-ipv6-entry */

      grouping mvpn-ipmsi-tunnel-info-ipv4 {
        description
          "Default mdt or I-PMSI configuration and
           operational state information";
        container mvpn-ipmsi-tunnel-ipv4 {


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          description
            "Default mdt or I-PMSI configuration and
             operational state information";
          uses mvpn-ipmsi-tunnel-config;
          uses mvpn-pmsi-state;
          uses mvpn-pmsi-ipv4-entry;
        }
      }

      grouping mvpn-ipmsi-tunnel-info-ipv6 {
        description
          "Default mdt or I-PMSI configuration and
           operational state information";
        container mvpn-ipmsi-tunnel-ipv6 {
          description
            "Default mdt or I-PMSI configuration and
             operational state information";
          uses mvpn-ipmsi-tunnel-config;
          uses mvpn-pmsi-state;
          uses mvpn-pmsi-ipv6-entry;
        }
      }

      grouping mvpn-spmsi-tunnel-info-ipv4 {
        description
          "Data mdt for rosen mvpn or S-PMSI for ng mvpn in
           IPv4 private network";

        container mvpn-spmsi-tunnels-ipv4 {
          description
            "S-PMSI tunnel configuration and
             operational state information.";
          uses mvpn-spmsi-tunnel-common-config;

          list mvpn-spmsi-tunnel-ipv4 {
            key "tunnel-type";
            description
              "S-PMSI tunnel attributes configuration and
               operational state information.";

            uses mvpn-spmsi-tunnel-per-item-config;
            choice address-mask-or-acl {
              description
                "Type of definition of private network
                 multicast address range";
              case address-mask {
                description "Use the type of address and mask";
                leaf ipv4-group-addr {
                  type rt-types:ipv4-multicast-group-address;


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                  description
                    "Start address of the IPv4 group
                     address range in private net. ";
                }
                leaf ipv4-group-masklength {
                  type uint8 {
                    range "4..32";
                  }
                  description
                    "Group mask length for the IPv4
                     group address range in private net.";
                }
                leaf ipv4-source-addr {
                  type inet:ipv4-address;
                  description
                    "Start address of the IPv4 source
                     address range in private net.";
                }
                leaf ipv4-source-masklength {
                  type uint8 {
                    range "0..32";
                  }
                  description
                    "Source mask length for the IPv4
                     source address range in private net.";
                }
              }
              case acl-name {
                description "Use the type of acl";
                leaf group-acl-ipv4 {
                  type leafref {
                    path "/acl:acls/acl:acl/acl:name";
                  }
                  description
                    "Specify the (s, g) entry on which the
                     S-PMSI tunnel takes effect.
                     The value is an integer ranging from 3000
                     to 3999 or a string of 32 case-sensitive
                     characters. If no value is specified, the
                     switch-group address pool takes effect on
                     all (s, g).";
                }
              }
            }
            uses mvpn-pmsi-state;
            uses mvpn-pmsi-ipv4-entry;
          }/* list mvpn-spmsi-tunnel-ipv4 */
        }/* container mvpn-spmsi-tunnels-ipv4 */
      }/* grouping mvpn-spmsi-tunnel-info-ipv4 */


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      grouping mvpn-spmsi-tunnel-info-ipv6 {
        description
          "Data mdt for rosen mvpn or S-PMSI for ng mvpn in
           IPv6 private network";

        container mvpn-spmsi-tunnels-ipv6 {
          description
            "S-PMSI tunnel configuration and
             operational state information.";
          uses mvpn-spmsi-tunnel-common-config;

          list mvpn-spmsi-tunnel-ipv6 {
            key "tunnel-type";
            description
              "S-PMSI tunnel attributes configuration and
               operational state information.";
            uses mvpn-spmsi-tunnel-per-item-config;

            choice address-mask-or-acl {
              description
                "Type of definition of private network
                 multicast address range";
              case address-mask {
                description "Use the type of address and mask";

                leaf ipv6-group-addr {
                  type rt-types:ipv6-multicast-group-address;
                  description
                    "Start address of the IPv6 group
                     address range in private net. ";
                }
                leaf ipv6-groupmasklength {
                  type uint8 {
                    range "8..128";
                  }
                  description
                    "Group mask length for the IPv6
                     group address range in private net.";
                }
                leaf ipv6-source-addr {
                  type inet:ipv6-address;
                  description
                    "Start address of the IPv6 source
                     address range in private net.";
                }
                leaf ipv6-source-masklength {
                  type uint8 {
                    range "0..128";


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                  }
                  description
                    "Source mask length for the IPv6
                     source address range in private net.";
                }
              }
              case acl-name {
                description "Use the type of acl";
                leaf group-acl-ipv6 {
                  type leafref {
                    path "/acl:acls/acl:acl/acl:name";
                  }
                  description
                    "Specify the (s, g) entry on which the
                     S-PMSI tunnel takes effect.
                     The value is an integer ranging from 3000
                     to 3999 or a string of 32 case-sensitive
                     characters. If no value is specified, the
                     switch-group address pool takes effect on
                     all (s, g).";
                }
              }
            }
            uses mvpn-pmsi-state;
            uses mvpn-pmsi-ipv6-entry;
          }/* list mvpn-spmsi-tunnel-ipv6 */
        }/* container mvpn-spmsi-tunnels-ipv6 */
      }/* grouping mvpn-spmsi-tunnel-info-ipv6 */

      augment "/ni:network-instances/ni:network-instance/ni:ni-type/"
              +"l3vpn:l3vpn/l3vpn:l3vpn/l3vpn:ipv4" {
        description
          "Augment l3vpn ipv4 container for per multicast VRF
           configuration and operational state.";
        container multicast {
          description
            "Configuration and operational state of multicast IPv4 vpn
             specific parameters";
          uses mvpn-instance-config;
          uses mvpn-rts;
          uses mvpn-ipmsi-tunnel-info-ipv4;
          uses mvpn-spmsi-tunnel-info-ipv4;
        }
      }

      augment "/ni:network-instances/ni:network-instance/ni:ni-type/"
              +"l3vpn:l3vpn/l3vpn:l3vpn/l3vpn:ipv6" {
        description
          "Augment l3vpn ipv6 container for per multicast VRF


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           configuration and operational state.";
        container multicast {
          description
            "Configuration and operational state of multicast IPv6 vpn
             specific parameters";
          uses mvpn-instance-config;
          uses mvpn-rts;
          uses mvpn-ipmsi-tunnel-info-ipv6;
          uses mvpn-spmsi-tunnel-info-ipv6;
        }
      }
   }
   <CODE ENDS>

5. Security Considerations

   TBD

6. IANA Considerations

   TBD

7. References

7.1. Normative References

   [RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for
             the Network Configuration Protocol (NETCONF)", RFC 6020,
             October 2010

   [RFC6037] Rosen, E., Cai, Y., and IJ. Wijnands, "Cisco Systems'
             Solution for Multicast in BGP/MPLS IP VPNs", RFC 6037,
             October 2010.

   [RFC6241] Enns, R., Ed., Bjorklund, M., Ed., Schoenwaelder, J., Ed.,
             and A. Bierman, Ed., "Network Configuration Protocol
             (NETCONF)", RFC 6241, June 2011

   [RFC6513] Rosen, E. and R. Aggarwal, "Multicast in MPLS/BGP IP
             VPNs", RFC 6513, February 2012.

   [RFC6514] Aggarwal, R., Rosen, E., Morin, T., and Y. Rekhter, "BGP
             Encodings and Procedures for Multicast in MPLS/BGP IP
             VPNs", RFC 6514, February 2012.

   [RFC6991] Schoenwaelder, J., Ed., "Common YANG Data Types",
             RFC 6991, July 2013




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   [RFC7246] IJ. Wijnands, P. Hitchen, N. Leymann, W. Henderickx, A.
             Gulko and J. Tantsura, " Multipoint Label Distribution
             Protocol In-Band Signaling in a Virtual Routing and
             Forwarding (VRF) Table Context ", RFC 7246, June 2014.

   [RFC7900] Y. Rekhter, E. Rosen, R. Aggarwal, Arktan, Y. Cai and T.
             Morin, " Extranet Multicast in BGP/IP MPLS VPNs ", RFC
             7900, June 2016.

   [RFC7950] Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language",
             RFC 7950, August 2016

   [RFC8279] Wijnands, IJ., Ed., Rosen, E., Ed., Dolganow, A.,
             Przygienda, T., and S. Aldrin, "Multicast Using Bit Index
             Explicit Replication (BIER)", RFC 8279, November 2017

   [RFC8294] Liu, X., Qu, Y., Lindem, A., Hopps, C., and L. Berger,
             "Common YANG Data Types for the Routing Area", RFC 8294,
             December 2017

   [RFC8342] Bjorklund, M., Schoenwaelder, J., Shafer, P., Watsen, K.,
             and R. Wilton, "Network Management Datastore Architecture
             (NMDA)", RFC 8342, March 2018

   [I-D.ietf-acl-yang] M. Jethanandani, L. Huang, S. Agarwal and D.
             Blair, "Network Access Control List (ACL) YANG Data
             Model", draft-ietf-netmod-acl-model-21(work in progress),
             November 2018

   [I-D.ietf-ni-model] Berger, L., Hopps, C., Lindem, A., and D.
             Bogdanovic, X. Liu, "Network Instance Model", draft-ietf-
             rtgwg-ni-model-12(work in progress), March 2018.

   [I-D.ietf-l3vpn-yang] D. Jain, K. Patel, P. Brissette, Z. Li, S.
             Zhuang, X. Liu, J. Haas, S. Esale and B. Wen, "Yang Data
             Model for BGP/MPLS L3 VPNs", draft-ietf-bess-l3vpn-yang-
             04(work in progress), October 2018.

7.2. Informative References

   [RFC8340] Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams",
             BCP 215, RFC 8340, March 2018

   [RFC8407] Bierman, A., "Guidelines for Authors and Reviewers of YANG
             Data Model Documents", RFC8407, October 2018






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8. Acknowledgments

   The authors would like to thank Anish Peter, Stig Venaas for their
   valuable contributions.














































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   Authors' Addresses

   Yisong Liu
   Huawei Technologies
   Huawei Bld., No.156 Beiqing Rd.
   Beijing  100095
   China

   Email: liuyisong@huawei.com


   Feng Guo
   Huawei Technologies
   Huawei Bld., No.156 Beiqing Rd.
   Beijing  100095
   China

   Email: guofeng@huawei.com


   Stephane Litkowski
   Orange


   Email: stephane.litkowski@orange.com




   Xufeng Liu
   Volta Networks


   Email: xufeng.liu.ietf@gmail.com




   Robert Kebler
   Juniper Networks
   10 Technology Park Drive
   Westford, MA 01886
   USA

   Email: rkebler@juniper.net






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   Mahesh Sivakumar
   Juniper Networks
   1133 Innovation Way
   Sunnyvale, California
   USA

   Email: sivakumar.mahesh@gmail.com











































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