module huawei-bgp-lsp {

    yang-version 1;

    namespace
      "urn:huawei:yang:huawei-bgp-lsp";

    prefix bgp-lsp;

    import huawei-extension {
      prefix ext;
    }
    import ietf-inet-types {
      prefix inet;
    }
    import huawei-network-instance {
      prefix ni;
    }
    import huawei-mpls {
      prefix mpls;
    }
    import huawei-bfd {
      prefix bfd;
    }
    import huawei-routing-policy {
      prefix rtp;
    }
    import huawei-ifm {
      prefix ifm;
    }
    import huawei-bgp {
      prefix bgp;
    }
    import huawei-l3vpn {
      prefix l3vpn;
    }
    import huawei-tunnel-management {
      prefix tnlm;
    }
    import huawei-mpls-te {
      prefix mpls-te;
    }

    organization
      "Huawei Technologies Co., Ltd.";

    contact
      "Huawei Industrial Base
    Bantian, Longgang
    Shenzhen 518129
    People's Republic of China
    Website: http://www.huawei.com
    Email: support@huawei.com";

    description
      "Inter-AS routing protocol that exchanges Network Layer Reachability Information (NLRI) with other BGP systems.";

    revision "2020-02-25" {
      description
        "The YANG descriptions are modified according to new standards.";
      reference
        "Huawei private.";

    }

    revision "2019-03-22" {
      description "Initial revision.";
      reference
        "Huawei private.";

    }

    ext:task-name "bgp";

    typedef lsp-type {
      type enumeration {
        enum "ingress" {
          value 1;
          description
            "Ingress of the BGP LSP.";
        }
        enum "transit" {
          value 2;
          description
            "Transit node of the BGP LSP.";
        }
        enum "egress" {
          value 4;
          description
            "Egress of the BGP LSP.";
        }
      }
      description "The type of the BGP LSP.";
    }

    typedef lsp-frr-type {
      type enumeration {
        enum "primary" {
          value 1;
          description "Primary LSP type.";
        }
        enum "backup" {
          value 2;
          description "Backup LSP type.";
        }
      }
      description
        "The type of the bgpLspFrr.";
    }

    typedef label-operation-type {
      type enumeration {
        enum "push" {
          value 0;
          description "Push a label.";
        }
        enum "swap" {
          value 1;
          description "Swap a Label.";
        }
        enum "pop" {
          value 2;
          description "Pop out a label.";
        }
        enum "swappush" {
          value 3;
          description
            "Swap a label and push a label.";
        }
        enum "popgo" {
          value 4;
          description
            "Packets are forwarded based on the next hop directly mapped to the
          label after label popping.";
        }
      }
      description
        "The type of the bgpLabelOperation.";
    }

    typedef exp-mode-type {
      type enumeration {
        enum "null" {
          value 0;
          description "Default value.";
        }
        enum "pipe" {
          value 1;
          description
            "The priority of BGP labels is not modified, and the outer label is removed.";
        }
        enum "uniform" {
          value 2;
          description
            "The label priority of intra-AS tunnels is copied to the BGP label.";
        }
      }
      description
        "The type of bgpcommExpMode.";
    }

    typedef bgp-bfd-trigger-type {
      type enumeration {
        enum "none" {
          value 0;
          description
            "No policy for establishing BGP BFD sessions is configured.";
        }
        enum "host" {
          value 1;
          description
            "Use host addresses to dynamically establish BGP BFD sessions.";
        }
        enum "ip-prefix" {
          value 2;
          description
            "IP prefix list used to dynamically establish a BFD session to monitor an LDP tunnel.";
        }
      }
      description
        "The type of BGP BFD trigger.";
    }

    grouping bgp-pipe-type {
      description "BGP pipe type.";
      leaf ttl-mode {
        type enumeration {
          enum "pipe" {
            value 2;
            description
              "The priority of BGP labels is not modified, and the outer label is removed.";
          }
          enum "uniform" {
            value 1;
            description
              "The label priority of intra-AS tunnels is copied to the BGP label.";
          }
        }
        default "pipe";
        description
          "Specifies the TTL mode, The available options are Uniform and Pipe. By default, the mode is Pipe.";
      }
    }  // grouping bgp-pipe-type

    grouping tunnel-info-common {
      description
        "Display the information of the vrf which used by this tunnel.";
      container tunnel-vpn-infos {
        config false;
        description
          "List of VPN instances. All VPN instances which use this tunnel.";
        list tunnel-vpn-info {
          key "vrf-name af-type nexthop";
          description
            "Statistics of a VPN instance of this Tunnel.";
          leaf vrf-name {
            type leafref {
              path
                "/ni:network-instance/ni:instances/ni:instance/ni:name";
            }
            description
              "VPN name of a BGP instance.";
          }

          leaf af-type {
            type l3vpn:af-type;
            description
              "Types of the VPN address families.";
          }

          leaf nexthop {
            type inet:ip-address-no-zone;
            description
              "The next hop address used by this tunnel.";
          }
        }  // list tunnel-vpn-info
      }  // container tunnel-vpn-infos
    }  // grouping tunnel-info-common

    container bgp-lsp {
      description
        "BGP LSP configuration and query items.";
      container bfd {
        description
          "Configure dynamic BFD for BGP LSP.";
        container parameters {
          description
            "Configure parameters of BFD for BGP LSP.";
          leaf enable {
            when
              "/mpls:mpls/mpls:common/mpls:global/mpls:mpls-enable='true' and /bfd:bfd";
            type boolean;
            default "false";
            description
              "Enable/disable dynamic BFD for BGP LSP.";
          }

          leaf min-tx-interval {
            when
              "/mpls:mpls/mpls:common/mpls:global/mpls:mpls-enable='true'";
            type uint32 {
              range "3..20000";
            }
            units "ms";
            description
              "Interval at which BFD packets are sent. The value range and default value are controlled by the PAF.";
          }

          leaf min-rx-interval {
            when
              "/mpls:mpls/mpls:common/mpls:global/mpls:mpls-enable='true'";
            type uint32 {
              range "3..20000";
            }
            units "ms";
            description
              "Interval at which BFD packets are received. The value range and default value are controlled by the PAF.";
          }

          leaf detection-multiplier {
            when
              "/mpls:mpls/mpls:common/mpls:global/mpls:mpls-enable='true'";
            type uint32 {
              range "3..50";
            }
            default "3";
            description
              "BFD detection multiplier.";
          }

          leaf trigger {
            when
              "/mpls:mpls/mpls:common/mpls:global/mpls:mpls-enable='true' and /bfd:bfd";
            type bgp-bfd-trigger-type;
            must
              "( ../trigger='ip-prefix' and ../trigger-ip-prefix-name ) or not ( ../trigger='ip-prefix' or ../trigger-ip-prefix-name )";
            default "none";
            description
              "Configure a policy for creating BGP LSP BFD sessions.";
          }

          leaf trigger-ip-prefix-name {
            when "../trigger='ip-prefix'";
            type leafref {
              path "/rtp:routing-policy/rtp:ipv4-prefix-filters/rtp:ipv4-prefix-filter/rtp:name";
            }
            description
              "To use an IP prefix list to dynamically create BFD sessions, specify a name of the IP prefix list.";
          }
        }  // container parameters

        container sessions {
          config false;
          description
            "List of the sessions of dynamic BFD for BGP LSP.";
          list session {
            key "fec-address out-if-name next-hop index";
            config false;
            description
              "Statistics of a session of dynamic BFD for BGP LSP.";
            leaf fec-address {
              type inet:ipv4-address-no-zone;
              config false;
              description
                "Display the FEC address of the session of dynamic BFD for BGP LSP.";
            }

            leaf out-if-name {
              type leafref {
                path "/ifm:ifm/ifm:interfaces/ifm:interface/ifm:name";
              }
              config false;
              description
                "Display the outbound interface of a BGP LSP.";
            }

            leaf next-hop {
              type inet:ipv4-address-no-zone;
              config false;
              description
                "Display the next hop of a BGP LSP.";
            }

            leaf index {
              type uint32;
              config false;
              description
                "Display the LSP index of a BGP LSP.";
            }

            leaf discriminator {
              type uint32;
              config false;
              description
                "Display the BFD discriminator of the BFD session of dynamic BFD for BGP LSP.";
            }

            leaf state {
              type enumeration {
                enum "admin-down" {
                  value 0;
                  description
                    "The BGP LSP BFD session is administratively Down.";
                }
                enum "down" {
                  value 1;
                  description
                    "The BGP LSP BFD session is Down.";
                }
                enum "init" {
                  value 2;
                  description
                    "The BGP LSP BFD session is in initial state.";
                }
                enum "up" {
                  value 3;
                  description
                    "The BGP LSP BFD session is Up.";
                }
              }
              config false;
              description
                "Display the BFD session state of dynamic BFD for BGP LSP.";
            }

            leaf min-tx-interval {
              type uint32;
              units "ms";
              config false;
              description
                "Display the minimum interval at which BFD packets of the session of dynamic BFD for BGP LSP are sent.";
            }

            leaf min-rx-interval {
              type uint32;
              units "ms";
              config false;
              description
                "Display the minimum interval at which BFD packets of the session of dynamic BFD for BGP LSP are received.";
            }

            leaf detection-multiplier {
              type uint32;
              config false;
              description
                "Display the BFD detection multiplier of the BFD session of dynamic BFD for BGP LSP.";
            }

            leaf age {
              type uint32;
              units "s";
              config false;
              description
                "Display the BFD session age of dynamic BFD for BGP LSP.";
            }
          }  // list session
        }  // container sessions
      }  // container bfd

      container states {
        config false;
        description "List of BGP LSPs.";
        list state {
          key "vrf-name af destination-address prefix-length index type indirect-id frr-type";
          config false;
          description
            "Operational state of BGP LSP.";
          leaf vrf-name {
            type leafref {
              path "/ni:network-instance/ni:instances/ni:instance/ni:name";
            }
            config false;
            description
              "VPN name of a BGP instance.";
          }

          leaf af {
            type bgp:af-type;
            config false;
            description
              "Specifies the address family type of a BGP instance.";
          }

          leaf destination-address {
            type inet:ip-address-no-zone;
            config false;
            description
              "Destination address of an LSP.";
          }

          leaf prefix-length {
            type uint32 {
              range "0..128";
            }
            config false;
            description
              "Prefix length of the destination address of an LSP.";
          }

          leaf index {
            type uint32;
            config false;
            description "LSP index.";
          }

          leaf type {
            type lsp-type;
            config false;
            description "LSP type.";
          }

          leaf indirect-id {
            type string {
              length "1..50";
            }
            config false;
            description "IndirectID.";
          }

          leaf frr-type {
            type lsp-frr-type;
            config false;
            description "FRR role.";
          }

          leaf nexthop {
            type inet:ip-address-no-zone;
            config false;
            description
              "Next hop of an LSP.";
          }

          leaf inbound-if-name {
            type leafref {
              path "/ifm:ifm/ifm:interfaces/ifm:interface/ifm:name";
            }
            config false;
            description
              "Inbound interface of an LSP.";
          }

          leaf outbound-if-name {
            type leafref {
              path "/ifm:ifm/ifm:interfaces/ifm:interface/ifm:name";
            }
            config false;
            description
              "Outbound interface of an LSP.";
          }

          leaf mtu {
            type uint32 {
              range "0..65535";
            }
            config false;
            description "LSP MTU.";
          }

          leaf duration {
            type uint32;
            units "s";
            config false;
            description "LSP duration.";
          }

          leaf in-label {
            type uint32;
            config false;
            description
              "In-label of an LSP.";
          }

          leaf out-label {
            type uint32;
            config false;
            description
              "Out-label of an LSP.";
          }

          leaf out-tunnel-index {
            type string {
              length "1..50";
            }
            config false;
            description
              "Index of an outbound LSP.";
          }

          leaf label-operation {
            type label-operation-type;
            config false;
            description
              "Label operation type.";
          }

          leaf qos-priority-mode {
            type exp-mode-type;
            config false;
            description
              "QoS priority mode of an LSP.";
          }

          leaf tunnel-id {
            type string {
              length "1..50";
            }
            config false;
            description
              "ID of an outbound LSP.";
          }

          leaf route-distinguisher {
            type string {
              length "3..21";
            }
            config false;
            description
              "A VPN address family takes effect only after it is configured with an RD. The format of an RD is as follows:
            1. 16-bit AS number:32-bit user-defined number, for example, 101:3. 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. This means that the RD value cannot be 0:0.
            2. 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.
            3. 32-bit AS number:16-bit user-defined number, for example, 10.11:3. An AS number ranges from 0.0 to 65535.65535 or from 0 to 4294967295, and a user-defined number ranges from 0 to 65535. The AS number and user-defined number cannot be both 0s. This means that the RD value cannot be 0.0:0.";
          }

          container tunnels {
            config false;
            description
              "List of tunnel information.";
            list tunnel {
              key "value";
              config false;
              description
                "Operational state of tunnel information.";
              leaf value {
                type string {
                  length "1..50";
                }
                config false;
                description
                  "The tunnel-key.";
              }
            }  // list tunnel
          }  // container tunnels
        }  // list state
      }  // container states
    }  // container bgp-lsp

    augment /mpls:mpls/mpls:common/mpls:global {
      description
        "MPLS BGP global configuration.";
      container bgp-ttl-mode {
        when
          "/mpls:mpls/mpls:common/mpls:global/mpls:mpls-enable='true'";
        description
          "Configure the TTL mode. The available options are uniform and pipe.";
        uses bgp-pipe-type;
      }  // container bgp-ttl-mode
    }

    augment /ifm:ifm/ifm:interfaces/ifm:interface/tnlm:tunnel-protocol/tnlm:type/mpls-te:mpls-te/mpls-te:te-tunnel/mpls-te:tunnel-mode/mpls-te:p2p-rsvp-te/mpls-te:rsvp-te {
      description
        "Augment the MPLS rsvp-te model to add L3VPN tunnel infomation.";
      uses tunnel-info-common;
    }

    augment /ifm:ifm/ifm:interfaces/ifm:interface/tnlm:tunnel-protocol/tnlm:type/mpls-te:mpls-te/mpls-te:te-tunnel/mpls-te:sr-te {
      description
        "Augment the MPLS sr-te model to add L3VPN tunnel infomation.";
      uses tunnel-info-common;
    }

    augment /ni:network-instance/ni:instances/ni:instance/mpls:mpls {
      description
        "Augment the MPLS model to add BGP VPN infomation.";
      container bgp-mpls-lsp {
        when "../../ni:name!='_public_'";
        presence
          "Create MPLS-BGP-VPN instance.";
        description
          "Enable/disable the MPLS-BGP-VPN instance.";
        container bfd {
          description
            "Configure dynamic BFD for BGP LSP.";
          container parameters {
            description
              "Configure parameters of BFD for BGP LSP.";
            leaf enable {
              when "/bfd:bfd";
              type boolean;
              default "false";
              description
                "Enable/disable dynamic BFD for BGP LSP.";
            }

            leaf min-tx-interval {
              type uint32 {
                range "3..20000";
              }
              units "ms";
              description
                "Interval at which BFD packets are sent. The value range and default value are controlled by the PAF.";
            }

            leaf min-rx-interval {
              type uint32 {
                range "3..20000";
              }
              units "ms";
              description
                "Interval at which BFD packets are received. The value range and default value are controlled by the PAF.";
            }

            leaf detection-multiplier {
              type uint32 {
                range "3..50";
              }
              default "3";
              description
                "BFD detection multiplier.";
            }

            leaf trigger {
              when "/bfd:bfd";
              type bgp-bfd-trigger-type;
              must
                "( ../trigger='ip-prefix' and ../trigger-ip-prefix-name ) or not ( ../trigger='ip-prefix' or ../trigger-ip-prefix-name )";
              default "none";
              description
                "Configure a policy for creating BGP LSP BFD sessions.";
            }

            leaf trigger-ip-prefix-name {
              when "../trigger='ip-prefix'";
              type leafref {
                path "/rtp:routing-policy/rtp:ipv4-prefix-filters/rtp:ipv4-prefix-filter/rtp:name";
              }
              description
                "To use an IP prefix list to dynamically create BFD sessions, specify a name of the IP prefix list.";
            }
          }  // container parameters
        }  // container bfd

        container bgp-ttl-mode {
          description
            "Configure the TTL mode. The available options are uniform and pipe.";
          uses bgp-pipe-type;
        }  // container bgp-ttl-mode
      }  // container bgp-mpls-lsp
    }
  }  // module huawei-bgp-lsp