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INTERNET-DRAFT                                              Mingui Zhang
Intended Status: Standards Track                                Yuan Gao
                                                              Haibo Wang
                                                                Bing Liu
                                                                  Huawei
                                                                 Fu Qiao
                                                            China Mobile
Expires: September 9, 2019                                 March 8, 2019

                Base YANG Data Model for NVO3 Protocols
                    draft-zhang-nvo3-yang-cfg-05.txt

Abstract

   This document describes the base YANG data model that can be used by
   operators to configure and manage Network Virtualization Overlay
   protocols.  The model is focused on the common configuration
   requirement of various encapsulation options, such as VXLAN, NVGRE,
   GENEVE and VXLAN-GPE. Using this model as a starting point,
   incremental work can be done to satisfy the requirement of a specific
   encapsulation.

Status of this Memo

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

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups.  Note that
   other groups may also distribute working documents as
   Internet-Drafts.

   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."

   The list of current Internet-Drafts can be accessed at
   http://www.ietf.org/1id-abstracts.html

   The list of Internet-Draft Shadow Directories can be accessed at
   http://www.ietf.org/shadow.html


Copyright and License Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors. All rights reserved.



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   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (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 respect
   to this document. Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.


Table of Contents

   1. Introduction  . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2. Acronyms and Terminology  . . . . . . . . . . . . . . . . . . .  3
     2.1. Acronyms  . . . . . . . . . . . . . . . . . . . . . . . . .  3
     2.2. Terminology . . . . . . . . . . . . . . . . . . . . . . . .  3
   3. The YANG Data Model for NVO3  . . . . . . . . . . . . . . . . .  3
     3.1. The Configuration Parameters  . . . . . . . . . . . . . . .  4
       3.1.1. NVE ID  . . . . . . . . . . . . . . . . . . . . . . . .  4
       3.1.2. Virtual Network Instance  . . . . . . . . . . . . . . .  4
       3.1.3. Flags in the Header . . . . . . . . . . . . . . . . . .  4
       3.1.4. BUM Mode  . . . . . . . . . . . . . . . . . . . . . . .  4
     3.2. Statistics  . . . . . . . . . . . . . . . . . . . . . . . .  4
     3.3. Model Structure . . . . . . . . . . . . . . . . . . . . . .  4
     3.4. YANG Module . . . . . . . . . . . . . . . . . . . . . . . .  7
   4. Security Considerations . . . . . . . . . . . . . . . . . . . . 26
   5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 26
   Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . . 27
   6. References  . . . . . . . . . . . . . . . . . . . . . . . . . . 27
     6.1. Normative References  . . . . . . . . . . . . . . . . . . . 27
     6.2. Informative References  . . . . . . . . . . . . . . . . . . 27
   Author's Addresses . . . . . . . . . . . . . . . . . . . . . . . . 29


















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1. Introduction

   Network Virtualization Overlays (NVO3), such as VXLAN, NVGRE, GENEVE
   and VXLAN-GPE, enable network virtualization for data center networks
   environment that assumes an IP-based underlay.

   YANG [RFC6020] 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]. This document
   specifies a YANG data model that can be used to configure and manage
   NVO3 protocols. The model covers the configuration of NVO3 instances
   as well as their operation states, which are the basic common
   requirements of the different tunnel encapsulations. Thus it is
   called "the base model for NVO3" in this document.

   As the Network Virtualization Overlay evolves, newly defined tunnel
   encapsulation may require extra configuration. For example, GENEVE
   may require configuration of TLVs at the NVE. The base model can be
   augmented to accommodate these new solutions.


2. Acronyms and Terminology

2.1. Acronyms

   NVO3: Network Virtualization Overlays
   VNI: Virtual Network Instance
   BUM: Broadcast, Unknown Unicast, Multicast traffic

   BUM: Broadcast, Unknown Unicast, Multicast traffic

2.2. Terminology

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

   Familiarity with [RFC7348], [RFC7364], [RFC7365] and [RFC8014] is
   assumed in this document.

3. The YANG Data Model for NVO3

   The NVO3 base YANG model is divided in three containers. The first
   container contains writable parameters. The second container contains
   the writable enablers per VNI for the statistical operational states
   as well as the status of these enablers. The third container contains
   the statistical operational states.




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3.1. The Configuration Parameters

3.1.1. NVE ID

   The 'nves' list contains NVEs under the management. The NVE is
   identified using the 'srcAddr', which is the underlay IP address of
   the NVE.

3.1.2. Virtual Network Instance

   A Virtual Network Instance ('VNI') is a specific VN instance on an
   NVE [RFC7365]. At each NVE, a Tenant System is connect to VNIs
   through Virtual Access Points (VAP). VAPs can be physical ports or
   virtual ports identified by the bridge domain Identifier ('bdId').
   The mapping between VNI and bdId is managed by the operator.

3.1.3. Flags in the Header

   Flags in the NVO3 header are to be configured. For VxLAN, the I bit
   of 'flag' MUST be set to 1 while other 7 bits are reserved and MUST
   be set to zero on transmission and ignored on receipt. For NVGRE,
   bits in position 0 and 3 MUST be set to zero. The bit in position 2
   MUST be set to 1. Bits from position 4 through 12 are reserved and
   MUST be set to zero on transmission and ignored on receipt.

3.1.4. BUM Mode

   An NVE SHOULD support either ingress replication, or multicast proxy,
   or point to multipoint tunnels on a per-VNI basis. It is possible
   that both modes be used simultaneously in one NVO3 network by
   different NVEs.

   If ingress replication is used, the receiver addresses are listed in
   'peers'. If multicast proxy is used, the proxy's address is given in
   "flood-proxy". If the choice is point to multipoint tunnels, the
   multicast address is given as 'multiAddr'.

3.2. Statistics

   Operators can determine whether a NVE should gather statistic values
   on a per-VNI base. The enablers are contained in the 'nvo3Info' list
   as 'statisticsEnable' leaf.

   If the gathering for a VNI is enabled, the statistical information
   about the local NVEs, the remote NVEs, the flows and the MAC
   addresses will be collected by the NVEs in this VNI.

3.3. Model Structure



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   module: ietf-nvo3-base
   +--rw nov3
      +--rw common
      |  +--rw nvo3-enable?   boolean
      +--rw nves
      |  +--rw nve* [if-name source-interface]
      |     +--rw if-name                      ifName
      |     +--rw vtep-ip?                     inet:ipv4-address-no-zone
      |     +--rw ipv6-vtep-ip?                inet:ipv6-address-no-zone
      |     +--rw source-interface             ifName
      |     +--rw mac-address?                 yang:mac-address
      |     +--rw bypass-vtep-ip?              inet:ipv4-address-no-zone
      |     +--rw vni-members
      |     |  +--rw vni-member* [vni-id]
      |     |     +--rw vni-id          uint32
      |     |     +--rw protocol-bgp?   protocolType
      |     |     +--rw peers
      |     |     |  +--rw peer* [peer-ip]
      |     |     |     +--rw peer-ip          inet:ipv4-address-no-zone
      |     |     |     +--rw out-vni-id?            uint32
      |     |     |     +--rw split-horizon-group?   string
      |     |     +--rw ipv6-peers
      |     |     |  +--rw ipv6-peer* [ipv6-peer-ip]
      |     |     |     +--rw ipv6-peer-ip     inet:ipv6-address-no-zone
      |     |     +--rw flood-proxys
      |     |     |  +--rw flood-proxy* [peer-ip]
      |     |     |     +--rw peer-ip     inet:ipv4-address-no-zone
      |     |     +--rw mcast-group* [mcast-group]
      |     |        +--rw mcast-group    inet:ipv4-address-no-zone
      |     +--rw vni-map-l2vpns
      |     |  +--rw vni-map-l2vpn* [vni-id]
      |     |     +--rw l2vpn-id               uint32
      |     |     +--rw l2vpn-name?            string
      |     |     +--rw vni-id                 uint32
      |     |     +--rw split-horizon-group?   string
      |     +--rw vni-map-l3vpns
      |     |  +--rw vni-map-l3vpn* [l3vpn-name]
      |     |     +--rw l3vpn-name    vrfName
      |     |     +--rw vni-id?       uint32
      |     +--ro vni-statistics-infos
      |     |  +--ro vni-statistic-info* [vni-id]
      |     |     +--ro vni-id            uint32
      |     |     +--ro vni-statistics
      |     |        +--ro rx-bits-persec?        uint64
      |     |        +--ro rx-pkts-persec?        uint64
      |     |        +--ro tx-bits-persec?        uint64
      |     |        +--ro tx-pkts-persec?        uint64
      |     |        +--ro rx-pkts?               uint64



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      |     |        +--ro rx-bytes?              uint64
      |     |        +--ro tx-pkts?               uint64
      |     |        +--ro tx-bytes?              uint64
      |     |        +--ro rx-unicast-pkts?       uint64
      |     |        +--ro rx-multicast-pkts?     uint64
      |     |        +--ro rx-broadcast-pkts?     uint64
      |     |        +--ro drop-unicast-pkts?     uint64
      |     |        +--ro drop-multicast-pkts?   uint64
      |     |        +--ro drop-broadcast-pkts?   uint64
      |     |        +--ro tx-unicast-pkts?       uint64
      |     |        +--ro tx-multicast-pkts?     uint64
      |     |        +--ro tx-broadcast-pkts?     uint64
      |     +--rw vnipeer-statistics-cfgs
      |     |  +--rw vnipeer-satistics-cfg* [vni-id peer-ip]
      |     |     +--rw vni-id     uint32
      |     |     +--rw peer-ip    inet:ipv4-address-no-zone
      |     +--ro vnipeer-statistics-infos
      |     |  +--ro vnipeer-satistics-info* [vni-id source-ip peer-ip]
      |     |     +--ro vni-id                uint32
      |     |     +--ro source-ip             inet:ipv4-address-no-zone
      |     |     +--ro peer-ip               inet:ipv4-address-no-zone
      |     |     +--ro vnipeer_statistics
      |     |        +--ro rx-bits-persec?        uint64
      |     |        +--ro rx-pkts-persec?        uint64
      |     |        +--ro tx-bits-persec?        uint64
      |     |        +--ro tx-pkts-persec?        uint64
      |     |        +--ro rx-pkts?               uint64
      |     |        +--ro rx-bytes?              uint64
      |     |        +--ro tx-pkts?               uint64
      |     |        +--ro tx-bytes?              uint64
      |     |        +--ro rx-unicast-pkts?       uint64
      |     |        +--ro rx-multicast-pkts?     uint64
      |     |        +--ro rx-broadcast-pkts?     uint64
      |     |        +--ro drop-unicast-pkts?     uint64
      |     |        +--ro drop-multicast-pkts?   uint64
      |     |        +--ro drop-broadcast-pkts?   uint64
      |     |        +--ro tx-unicast-pkts?       uint64
      |     |        +--ro tx-multicast-pkts?     uint64
      |     |        +--ro tx-broadcast-pkts?     uint64
      |     +--rw ipv6-vnipeer-statistics-cfgs
      |     |  +--rw ipv6-vnipeer-statistics-cfg* [vni-id ipv6-source-ip ipv6-peer-ip]
      |     |     +--rw vni-id            uint32
      |     |     +--rw ipv6-source-ip    inet:ipv6-address-no-zone
      |     |     +--rw ipv6-peer-ip      inet:ipv6-address-no-zone
      |     +--ro ipv6-vnipeer-statistics-infos
      |        +--ro ipv6-vnipeer-statistics-info* [vniId ipv6-source-ip ipv6-peer-ip]
      |           +--ro vniId                      uint32
      |           +--ro ipv6-source-ip             inet:ipv6-address-no-zone



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      |           +--ro ipv6-peer-ip               inet:ipv6-address-no-zone
      |           +--ro ipv6_vnipeer_statistics
      |              +--ro rx-bits-persec?        uint64
      |              +--ro rx-pkts-persec?        uint64
      |              +--ro tx-bits-persec?        uint64
      |              +--ro tx-pkts-persec?        uint64
      |              +--ro rx-pkts?               uint64
      |              +--ro rx-bytes?              uint64
      |              +--ro tx-pkts?               uint64
      |              +--ro tx-bytes?              uint64
      |              +--ro rx-unicast-pkts?       uint64
      |              +--ro rx-multicast-pkts?     uint64
      |              +--ro rx-broadcast-pkts?     uint64
      |              +--ro drop-unicast-pkts?     uint64
      |              +--ro drop-multicast-pkts?   uint64
      |              +--ro drop-broadcast-pkts?   uint64
      |              +--ro tx-unicast-pkts?       uint64
      |              +--ro tx-multicast-pkts?     uint64
      |              +--ro tx-broadcast-pkts?     uint64
      +--ro vnipeer-infos
      |  +--ro vnipeer-info* [vni-id source-ip peer-ip]
      |     +--ro vni-id        uint32
      |     +--ro source-ip     inet:ip-address-no-zone
      |     +--ro peer-ip       inet:ip-address-no-zone
      |     +--ro type?         peerType
      |     +--ro out-vni-id?   uint32
      +--rw vni-infos
      |  +--rw vni_info* [vni-id]
      |     +--rw vni-id               uint32
      |     +--rw statistics-enable?   vniStatisticsEnable
      |     +--ro status?              vniStatus
      +--ro tunnel-infos
         +--ro tunnel-infos* [tunnel-id]
            +--ro tunnel-id    uint32
            +--ro source-ip?   inet:ip-address-no-zone
            +--ro peer-ip?     inet:ip-address-no-zone
            +--ro status?      tunnelStatus
            +--ro type?        tunnelType
            +--ro up-time?     string
            +--ro vrf-name?    vrfName



  Figure 3.1. The tree structure of YANG module for NVO3 configuration

3.4. YANG Module

   <CODE BEGINS> file "ietf-nvo3-base@2019-03-01.yang"



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   module ietf-nvo3-base {
     namespace "urn:ietf:params:xml:ns:yang:ietf-nvo3-base";
     //namespace need to be assigned by IANA
     prefix "nvo3";
     import ietf-inet-types {
       prefix "inet";
     }
     import ietf-yang-types {
       prefix yang;
     }

     organization "IETF NVO3 Working Group";
     contact "zhangmingui@huawei.com
       sean.gao@huawei.com";
     description "nvo3 yang module";
     revision "2019-03-01" {
       description
         "Initial version";
       reference "RFC 7348 RFC 7637";
     }
     typedef vrfName {
       type string {
         length "1..31";
       }
       description
         "vrfName is a string type with length constraints";
     }
     typedef ifName {
       type string {
         length "1..63";
       }
       description
         "ifName is a string type with length constraints";
     }
     typedef vniStatus {
       type enumeration {
         enum up {
           description
                 "The VNI is up";
         }
         enum down {
           description
             "The VNI is down";
         }
       }
       description
         "The status of a VNI can be either up or down";



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     }
     typedef protocolType {
       type enumeration {
         enum null {
           description
             "No specific protocol is used";
         }
         enum evpn {
           description
                 "EVPN is used as the control plane protocol";
         }
       }
       description
         "The protocol type being used as control plane";
     }
     typedef peerType {
       type enumeration {
         enum static {
           description
                 "Static peer NVE";
         }
         enum dynamic {
           description
                 "Dynamic peer NVE";
         }
       }
       description
         "The type of the peer NVE";
     }
     typedef tunnelStatus {
       type enumeration {
         enum up {
           description
             "The tunnel is up";
          }
          enum down {
           description
             "The tunnel is down";
         }
       }
       description
         "The status of a tunnel can be either up or down";
     }
     typedef vniStatisticsEnable {
       type enumeration {
         enum enable {
           description
             "The statistics is enabled";



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          }
          enum disable {
           description
             "The statistics is disabled";
          }
       }
       description
             "The statistics of a VNI can be enabled or disabled";
     }
     typedef tunnelType {
       type enumeration {
         enum dynamic {
           description
             "The tunnel is built in a dynamic way";
          }
          enum static {
           description
             "The tunnel is built by static configuration";
          }
       }
       description
         "The type of a tunnel";
     }
     container nvo3{
       description
         "NVO3 base YANG main part";
       container common {
         description
           "Common part";
         leaf nvo3-enable {
           type boolean;
           default "false";
           description
             "Enable/Disable NVO3 featrues";
       }
     }
       container nves {
         description
           "Parameters of NVEs";
         list nve {
           key "if-name source-interface";
           description
                 "The list of NVEs";
           leaf if-name {
             type ifName;
             description
               "nve interface name";
           }



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           leaf vtep-ip {
             type inet:ipv4-address-no-zone;
             description
               "NVO3 tunnel source address";
           }
           leaf ipv6-vtep-ip {
             type inet:ipv6-address-no-zone;
             description
               "ipv6 NVO3 tunnel source address";
           }
           leaf source-interface {
             type ifName;
             description
               "source interface";
           }
           leaf mac-address {
             type yang:mac-address;
             description
               "mac address";
           }
           leaf bypass-vtep-ip {
             type inet:ipv4-address-no-zone;
             description
               "bypass NVO3 tunnel source address";
           }
           container vni-members {
                 description
                   "The VNI members on the NVE";
             list vni-member {
               key "vni-id";
               description
                 "nve vni member";
               leaf vni-id {
                 type uint32 {
                   range "1..16777215";
                 }
                 description
                   "Associate NVO3 VNIs (Virtual Network Identifiers) with the NVE interface.";
               }
               leaf protocol-bgp {
                 type protocolType;
                 default "null";
                 description
                   "Enables BGP EVPN with ingress replication for the VNI.";
               }
               container peers {
                 description
                       "The peers in this VNI";



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                 list peer {
                   key "peer-ip";
                   description
                             "A peer NVE in this VNI";
                   leaf peer-ip {
                     type inet:ipv4-address-no-zone;
                     description
                       "peer ip address";
                   }
                   leaf out-vni-id {
                     type uint32 {
                       range "1..16777215";
                     }
                     description
                       "out vni id";
                   }
                   leaf split-horizon-group {
                     type string {
                       length "1..31";
                     }
                     description
                       "split group name";
                   }
                 }
               }
               container ipv6-peers {
                 description
                   "The IPv6 peers in this VNI";
                 list ipv6-peer {
                   key "ipv6-peer-ip";
                     description
                           "An IPv6 peer NVE in this VNI";
                   leaf ipv6-peer-ip {
                     type inet:ipv6-address-no-zone;
                     description
                       "peer ipv6 address";
                   }
                 }
               }
               container flood-proxys {
                     description
                       "The flood proxys for this VNI";
                 list flood-proxy {
                   key "peer-ip";
                   leaf peer-ip {
                     type inet:ipv4-address-no-zone;
                     description
                       "peer ip address";



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                   }
                           description
                             "List of the flood proxys";
                 }
               }
               list mcast-group {
                 key "mcast-group";
                     description
                       "The multicast groups in this VNI";
                 leaf mcast-group {
                   type inet:ipv4-address-no-zone;
                   description
                     "mcast ip address";
                 }
               }
             }
           }
              container vni-map-l2vpns {
            description
              "Mapping VNIs to L2VPNs";
              list vni-map-l2vpn {
                key "vni-id";
                description
                  "L2VPN";
                leaf l2vpn-id {
                  type uint32 {
                    range "1..16777215";
                  }
                  mandatory true;
                  description
                    "l2vpn id";
                }
                leaf l2vpn-name {
                  type string {
                    length "1..31";
                  }
                  description
                    "l2vpn name";
                }
                leaf vni-id {
                  type uint32 {
                    range "1..16777215";
                  }
                  description
                    "vni id";
                }
                leaf split-horizon-group {
                  type string {



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                    length "1..31";
                  }
                  description
                    "split group name";
                }
              }
            }
            container vni-map-l3vpns {
              description
            "Mapping VNIs to L3VPNs";
              list vni-map-l3vpn {
                key "l3vpn-name";
                description
              "L3VPN";
                leaf l3vpn-name {
                  type vrfName;
                  description
                    "l3vpn name";
                }
                leaf vni-id {
                  type uint32 {
                    range "1..16777215";
                  }
                  description
                    "vni id";
                }
              }
            }
         container vni-statistics-infos {
             config false;
             description
               "The statistics information for VNIs";
             list vni-statistic-info {
               key "vni-id";
               config false;
               description
                 "The statistics information for a VNI";
               leaf vni-id {
                 type uint32 {
                   range "1..16777215";
                 }
                 config false;
                 description
                   "vni id";
               }
               container vni-statistics {
                 config false;
                 description



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                   "The statistics information items for a VNI";
                 leaf rx-bits-persec {
                   type uint64;
                   config false;
                       description
                     "Received bits per second";
                 }
                 leaf rx-pkts-persec {
                   type uint64;
                   config false;
                       description
                     "Received packets per second";
                 }
                 leaf tx-bits-persec {
                   type uint64;
                   config false;
                       description
                     "Transmitted bits per second";
                 }
                 leaf tx-pkts-persec {
                   type uint64;
                   config false;
                       description
                     "Transmitted packets per second";
                 }
                 leaf rx-pkts {
                   type uint64;
                   config false;
                       description
                     "Received packets";
                 }
                 leaf rx-bytes {
                   type uint64;
                   config false;
                       description
                     "Received bytes";
                 }
                 leaf tx-pkts {
                   type uint64;
                   config false;
                                   description
                     "Transmitted packets";
                 }
                 leaf tx-bytes {
                   type uint64;
                   config false;
                                   description
                     "Transmitted bytes";



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                 }
                 leaf rx-unicast-pkts {
                   type uint64;
                   config false;
                                   description
                     "Received unicast packets";
                 }
                 leaf rx-multicast-pkts {
                   type uint64;
                   config false;
                                   description
                     "Received multicast packets";
                 }
                 leaf rx-broadcast-pkts {
                   type uint64;
                   config false;
                                   description
                     "Received broadcast packets";
                 }
                 leaf drop-unicast-pkts {
                   type uint64;
                   config false;
                                   description
                     "Dropped unicast packets";
                 }
                 leaf drop-multicast-pkts {
                   type uint64;
                   config false;
                                   description
                     "Dropped multicast packets";
                 }
                 leaf drop-broadcast-pkts {
                   type uint64;
                   config false;
                                   description
                     "Dropped broadcast packets";
                 }
                 leaf tx-unicast-pkts {
                   type uint64;
                   config false;
                                   description
                     "Transmitted unicast packets";
                 }
                 leaf tx-multicast-pkts {
                   type uint64;
                   config false;
                                   description
                     "Transmitted multicast packets";



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                 }
                 leaf tx-broadcast-pkts {
                   type uint64;
                   config false;
                                   description
                     "Transmitted broadcast packets";
                 }
               }
             }
           }
           container vnipeer-statistics-cfgs {
             description
               "Statistics configuration of peers in the VNI.";
                         list vnipeer-satistics-cfg {
               key "vni-id peer-ip";
                           description
                 "Statistics configuration of a peer in the VNI.";
               leaf vni-id {
                 type uint32 {
                   range "1..16777215";
                 }
                 description
                   "vni id";
               }
               leaf peer-ip {
                 type inet:ipv4-address-no-zone;
                             description
                        "The Ipv4 address of the peer";
               }
             }
           }
           container vnipeer-statistics-infos {
             config false;
                     description
               "Statistics configuration of the peers in a VNI";
             list vnipeer-satistics-info {
               key "vni-id source-ip peer-ip";
               config false;
                           description
                 "Statistics information of a peer in the VNI.";
               leaf vni-id {
                 type uint32 {
                   range "0..16777215";
                 }
                 config false;
                 description
                   "vni id";
               }



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               leaf source-ip {
                 type inet:ipv4-address-no-zone;
                 config false;
                         description
                   "Source address";
               }
               leaf peer-ip {
                 type inet:ipv4-address-no-zone;
                 config false;
                         description
                   "Address of the peer";
               }
               container vnipeer_statistics {
                 config false;
                             description
                                   "Statistics information items of a peer in the VNI";
                 leaf rx-bits-persec {
                   type uint64;
                   config false;
                               description
                     "Received bits per second";
                 }
                 leaf rx-pkts-persec {
                   type uint64;
                   config false;
                                   description
                     "Received packets per second";
                 }
                 leaf tx-bits-persec {
                   type uint64;
                   config false;
                                   description
                     "Transmitted bits per second";
                 }
                 leaf tx-pkts-persec {
                   type uint64;
                   config false;
                                   description
                     "Transmitted packets per second";
                 }
                 leaf rx-pkts {
                   type uint64;
                   config false;
                                   description
                     "Received packets";
                 }
                 leaf rx-bytes {
                   type uint64;



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                   config false;
                                   description
                     "Received bytes";
                 }
                 leaf tx-pkts {
                   type uint64;
                   config false;
                                   description
                     "Transmitted packets";
                 }
                 leaf tx-bytes {
                   type uint64;
                   config false;
                                   description
                     "Transmitted bytes";
                 }
                 leaf rx-unicast-pkts {
                   type uint64;
                   config false;
                                   description
                     "Received unicast packets";
                 }
                 leaf rx-multicast-pkts {
                   type uint64;
                   config false;
                                   description
                     "Received multicast packets";
                 }
                 leaf rx-broadcast-pkts {
                   type uint64;
                   config false;
                                   description
                     "Received broadcast packets";
                 }
                 leaf drop-unicast-pkts {
                   type uint64;
                   config false;
                                   description
                     "Dropped unicast packets";
                 }
                 leaf drop-multicast-pkts {
                   type uint64;
                   config false;
                                   description
                     "Dropped multicast packets";
                 }
                 leaf drop-broadcast-pkts {
                   type uint64;



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                   config false;
                                   description
                     "Dropped broadcast packets";
                 }
                 leaf tx-unicast-pkts {
                   type uint64;
                   config false;
                                   description
                     "Transmitted unicast packets";
                 }
                 leaf tx-multicast-pkts {
                   type uint64;
                   config false;
                                   description
                     "Transmitted multicast packets";
                 }
                 leaf tx-broadcast-pkts {
                   type uint64;
                   config false;
                                   description
                     "Transmitted broadcast packets";
                 }
               }
             }
           }
           container ipv6-vnipeer-statistics-cfgs {
                     description
               "Statistics configuration of IPv6 peers in the VNI.";
             list ipv6-vnipeer-statistics-cfg {
               key "vni-id ipv6-source-ip ipv6-peer-ip";
                           description
                 "Statistics configuration of an IPv6 peer in the VNI.";
               leaf vni-id {
                 type uint32 {
                   range "1..16777215";
                 }
                 description
                   "vni id";
               }
               leaf ipv6-source-ip {
                 type inet:ipv6-address-no-zone;
                             description
                   "Source IPv6 address";
               }
               leaf ipv6-peer-ip {
                 type inet:ipv6-address-no-zone;
                         description
                   "IPv6 address of the peer";



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               }
             }
           }
           container ipv6-vnipeer-statistics-infos {
             config false;
             description
               "Statistics information of IPv6 peers in the VNI.";
             list ipv6-vnipeer-statistics-info {
               key "vniId ipv6-source-ip ipv6-peer-ip";
               config false;
                           description
                 "Statistics information of an IPv6 peer in the VNI.";
               leaf vniId {
                 type uint32 {
                   range "1..16777215";
                 }
                 config false;
                 description
                   "vni id";
               }
               leaf ipv6-source-ip {
                 type inet:ipv6-address-no-zone;
                 config false;
                             description
                   "Source IPv6 address";
               }
               leaf ipv6-peer-ip {
                 type inet:ipv6-address-no-zone;
                 config false;
                             description
                   "IPv6 address of the peer";
               }
               container ipv6_vnipeer_statistics {
                 config false;
                             description
                   "Statistics information items of an IPv6 peer in the VNI.";
                 leaf rx-bits-persec {
                   type uint64;
                   config false;
                               description
                     "Received bits per second";
                 }
                 leaf rx-pkts-persec {
                   type uint64;
                   config false;
                                   description
                     "Received packets per second";
                 }



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                 leaf tx-bits-persec {
                   type uint64;
                   config false;
                                   description
                     "Transmitted bits per second";
                 }
                 leaf tx-pkts-persec {
                   type uint64;
                   config false;
                                   description
                     "Transmitted packets per second";
                 }
                 leaf rx-pkts {
                   type uint64;
                   config false;
                                   description
                     "Received packets";
                 }
                 leaf rx-bytes {
                   type uint64;
                   config false;
                                   description
                     "Received bytes";
                 }
                 leaf tx-pkts {
                   type uint64;
                   config false;
                                   description
                     "Transmitted packets";
                 }
                 leaf tx-bytes {
                   type uint64;
                   config false;
                                   description
                     "Transmitted bytes";
                 }
                 leaf rx-unicast-pkts {
                   type uint64;
                   config false;
                                   description
                     "Received unicast packets";
                 }
                 leaf rx-multicast-pkts {
                   type uint64;
                   config false;
                                   description
                     "Received multicast packets";
                 }



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                 leaf rx-broadcast-pkts {
                   type uint64;
                   config false;
                                   description
                     "Received broadcast packets";
                 }
                 leaf drop-unicast-pkts {
                   type uint64;
                   config false;
                                   description
                     "Dropped unicast packets";
                 }
                 leaf drop-multicast-pkts {
                   type uint64;
                   config false;
                                   description
                     "Dropped multicast packets";
                 }
                 leaf drop-broadcast-pkts {
                   type uint64;
                   config false;
                                   description
                     "Dropped broadcast packets";
                 }
                 leaf tx-unicast-pkts {
                   type uint64;
                   config false;
                                   description
                     "Transmitted unicast packets";
                 }
                 leaf tx-multicast-pkts {
                   type uint64;
                   config false;
                                   description
                     "Transmitted multicast packets";
                 }
                 leaf tx-broadcast-pkts {
                   type uint64;
                   config false;
                                   description
                     "Transmitted broadcast packets";
                 }
               }
             }
           }
         }
       }
       container vnipeer-infos {



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         config false;
             description
           "Information of the peers";
         list vnipeer-info {
           key "vni-id source-ip peer-ip";
           config false;
                   description
             "Information of a peer";
           leaf vni-id {
             type uint32 {
               range "1..16777215";
             }
             config false;
             description
               "vni-id";
           }
           leaf source-ip {
             type inet:ip-address-no-zone;
             config false;
             description
               "source ip";
           }
           leaf peer-ip {
             type inet:ip-address-no-zone;
             config false;
             description
               "peer ip";
           }
           leaf type {
             type peerType;
             config false;
             description
               "peer type";
           }
           leaf out-vni-id {
             type uint32 {
               range "1..16777215";
             }
             config false;
             description
               "out vni id";
           }
         }
       }
       container vni-infos {
             description
           "Information of the VNIs";
         list vni_info {



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           key "vni-id";
                   description
                     "Information of a VNI";
           leaf vni-id {
             type uint32 {
               range "1..16777215";
             }
             description
               "vni id";
           }
           leaf statistics-enable {
             type vniStatisticsEnable;
             default "disable";
                     description
                           "Statistics is enabled or not";
           }
           leaf status {
             type vniStatus;
             config false;
                     description
                           "The status of the VNI";
           }
         }
       }
       container tunnel-infos {
         config false;
             description
                   "Information of tunnels";
         list tunnel-infos {
           key "tunnel-id";
           config false;
                   description
                     "Information of a tunnel";
           leaf tunnel-id {
             type uint32 {
               range "1..4294967295";
             }
             config false;
             description
               "tunnel id";
           }
           leaf source-ip {
             type inet:ip-address-no-zone;
             config false;
             description
               "source";
           }
           leaf peer-ip {



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             type inet:ip-address-no-zone;
             config false;
             description
               "peer ip";
           }
           leaf status {
             type tunnelStatus;
             config false;
             description
               "tunnel status";
           }
           leaf type {
             type tunnelType;
             config false;
             description
               "tunnel type";
           }
           leaf up-time {
             type string {
               length "1..10";
             }
             config false;
             description
               "tunnel up time";
           }
           leaf vrf-name {
             type vrfName;
             default "_public_";
             config false;
             description
               "vrf";
           }
         }
       }
     }
   }
   <CODE ENDS>

4. Security Considerations

   This document raises no new security issues.

5. IANA Considerations

   The namespace URI defined in Section 3.3 need be registered in the
   IETF XML registry [RFC3688].

   This document need to register the 'ietf-nvo3-base' YANG module in



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   the YANG Module Names registry [RFC6020].

Acknowledgements

   Authors would like to thank the comments and suggestions from Tao
   Han, Weilian Jiang.

6. References

6.1. Normative References

   [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
             Requirement Levels", BCP 14, RFC 2119, March 1997.

   [RFC7364] T. Narten, E. Gray, et al, "Problem Statement: Overlays for
             Network Virtualization", draft-ietf-nvo3-overlay-problem-
             statement, working in progress.

   [RFC7365] Marc Lasserre, Florin Balus, et al, "Framework for DC
             Network Virtualization", draft-ietf-nvo3-framework, working
             in progress.

   [RFC7348] Mahalingam, M., Dutt, D., Duda, K., Agarwal, P., Kreeger,
             L., Sridhar, T., Bursell, M., and C. Wright, "Virtual
             eXtensible Local Area Network (VXLAN): A Framework for
             Overlaying Virtualized Layer 2 Networks over Layer 3
             Networks", RFC 7348, August 2014.

   [I-D.ietf-nvo3-geneve] Gross, J., Ganga, I., and T. Sridhar, "Geneve:
             Generic Network Virtualization Encapsulation", draft-ietf-
                     nvo3-geneve-10 (work in progress), March 2019.

   [RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
             January 2004.

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

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

6.2. Informative References
   [RFC7637] M. Sridharan, A. Greenberg, et al, "NVGRE: Network
             Virtualization using Generic Routing Encapsulation",
             RFC7637, September 2015.
   [I-D.ietf-nvo3-vxlan-gpe] Maino, F., Kreeger, L., and U. Elzur,



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             "Generic Protocol Extension for VXLAN", draft-ietf-nvo3-
             vxlan-gpe-06 (work in progress), April 2018.
   [RFC8014] D. Black, J. Hudson, L. Kreeger, M. Lasserre, T. Narten, An
             Architecture for Data-Center Network Virtualization over
             Layer 3 (NVO3), RFC8014, December 2016.
   [I-D.ietf-nvo3-encap-02] Boutros, S., "NVO3 Encapsulation
             Considerations", draft-ietf-nvo3-encap-02 (work in
             progress), September, 2018.











































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Author's Addresses


   Mingui Zhang
   Huawei Technologies
   No. 156 Beiqing Rd. Haidian District,
   Beijing 100095
   P.R. China

   EMail: zhangmingui@huawei.com

   Yuan Gao
   Huawei Technologies
   No. 101 Nanjing Rd. Yuhua District,
   Nanjing 210012
   P.R. China
   EMail: sean.gao@huawei.com

   Haibo Wang
   Huawei Technologies
   No. 156 Beiqing Rd. Haidian District,
   Beijing 100095
   P.R. China
   EMail: rainsword.wang@huawei.com

   Bing Liu
   Huawei Technologies
   No. 156 Beiqing Rd. Haidian District,
   Beijing 100095
   P.R. China
   EMail: remy.liubing@huawei.com

   Fu Qiao
   China Mobile

   EMail: fuqiao@chinamobile.com















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