module huawei-mpls-te-bfd {

    yang-version 1;

    namespace
      "urn:huawei:yang:huawei-mpls-te-bfd";

    prefix mpls-te-bfd;

    import huawei-extension {
      prefix ext;
    }
    import huawei-mpls {
      prefix mpls;
    }
    import huawei-mpls-te {
      prefix mpls-te;
    }
    import ietf-inet-types {
      prefix inet;
    }
    import huawei-pub-type {
      prefix pub-type;
    }
    import huawei-rsvp-interface {
      prefix rsvp-interface;
    }
    import huawei-tunnel-management {
      prefix tnlm;
    }
    import huawei-ifm {
      prefix ifm;
    }
    import huawei-bfd {
      prefix bfd;
    }
    import huawei-network-instance {
      prefix ni;
    }

    include huawei-mpls-te-bfd-type;

    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
      "Specifies the multi-protocol label switching protocol.";

    revision "2020-09-24" {
      description
        "Added reverse labels for BFD sessions and the function to query dynamic BFD session information.";
      reference
        "Huawei private.";

    }

    revision "2020-07-23" {
      description
        "Added the reverse label of the BFD session.";
      reference
        "Huawei private.";

    }

    revision "2020-07-04" {
      description
        "Fixed BFD for lsp condition for SR-TE, and add BFD initial down for SR-TE.";
      reference
        "Huawei private.";

    }

    revision "2020-03-24" {
      description "Fixed some descriptions.";
      reference
        "Huawei private.";

    }

    revision "2019-12-17" {
      description
        "Delete the must constranit for sr-te tunnel bfd-for-lsp's min-rx-interval node.";
      reference
        "Huawei private.";

    }

    revision "2019-11-12" {
      description
        "Added BFD configurations in the p2p templates and p2mp templates.";
      reference
        "Huawei private.";

    }

    revision "2019-03-27" {
      description "Init revision.";
      reference
        "Huawei private.";

    }

    ext:task-name "mpls-te";

    augment /mpls:mpls/mpls-te:te {
      description
        "Global MPLS TE BFD Configuration informations.";
      container bfd-for-lsp {
        when
          "/mpls:mpls/mpls-te:te/mpls-te:enable='true'";
        description
          "Configure global MPLS TE BFD.";
        leaf enable {
          when "/bfd:bfd";
          type boolean;
          default "false";
          description
            "Enable/disable capability of global MPLS TE BFD detection.
Special explanation:
Constraint: This capability depends on the configuration of global bfd.";
        }

        leaf mode {
          when "../enable='true'";
          type bfd-for-lsp-mode;
          description
            "BFD detect mode.
Special explanation:
In one-arm BFD, the configured min-tx-interval does not take effect.";
        }

        leaf min-tx-interval {
          type uint32 {
            range "3..1000";
          }
          units "ms";
          description
            "Interval for sending Global MPLS TE BFD packets.";
        }

        leaf min-rx-interval {
          type uint32 {
            range "3..1000";
          }
          units "ms";
          description
            "Interval for receiving Global MPLS TE BFD packets.";
        }

        leaf detect-multiplier {
          type uint32 {
            range "3..50";
          }
          default "3";
          description
            "Maximum number of times for losing Global MPLS TE BFD packets.";
        }
      }  // container bfd-for-lsp

      container bfd-for-tunnel {
        when
          "/mpls:mpls/mpls-te:te/mpls-te:enable='true'";
        description
          "Configure global MPLS TE BFD for tunnel.";
        leaf mode {
          when "/bfd:bfd";
          type bfd-for-tunnel-mode;
          description
            "BFD detect mode.
Special explanation:
In one-arm BFD, the configured min-tx-interval does not take effect.
Once mode one-arm-echo is configured, BFD for tunnel is enabled.";
        }

        leaf min-tx-interval {
          type uint32 {
            range "3..1000";
          }
          units "ms";
          description
            "Interval at which packets of global MPLS TE BFD for tunnel are sent.";
        }

        leaf min-rx-interval {
          type uint32 {
            range "3..1000";
          }
          units "ms";
          description
            "Interval at which packets of global MPLS TE BFD for tunnel are received.";
        }

        leaf detect-multiplier {
          type uint32 {
            range "3..50";
          }
          default "3";
          description
            "Maximum number of times for losing global MPLS TE BFD for tunnel packets.";
        }
      }  // container bfd-for-tunnel

      container bfd-sessions {
        when
          "/mpls:mpls/mpls-te:te/mpls-te:enable='true'";
        config false;
        description
          "List of statistics all dynamic BFD sessions for RSVP-TE or SR-MPLS TE.";
        list bfd-session {
          key "fec-address next-hop discriminator";
          description
            "Statistics of a dynamic BFD session for RSVP-TE or SR-MPLS TE.";
          leaf fec-address {
            type inet:ipv4-address-no-zone;
            description "FEC address.";
          }

          leaf next-hop {
            type inet:ipv4-address-no-zone;
            description "Next hop address.";
          }

          leaf discriminator {
            type uint32;
            description "BFD discriminator.";
          }

          leaf outgoing-interface-name {
            type pub-type:if-name;
            description
              "Outgoing interface name of the tunnel.";
          }

          leaf tunnel-name {
            type string {
              length "1..63";
            }
            description "Tunnel name.";
          }

          leaf lsp-index {
            type uint32;
            description
              "LSP index of the BFD session.";
          }

          leaf signal-protocol {
            type signal-protocol-type;
            description
              "Signal protocol type of the tunnel.";
          }

          leaf tunnel-id {
            type uint16 {
              range "1..65535";
            }
            description "Tunnel ID.";
          }

          leaf lsp-id {
            type uint16;
            description "LSP ID.";
          }

          leaf min-tx-interval {
            type uint32 {
              range "3..1000";
            }
            description
              "Interval at which packets of global MPLS TE BFD for tunnel are sent.";
          }

          leaf min-rx-interval {
            type uint32 {
              range "3..1000";
            }
            description
              "Interval at which packets of global MPLS TE BFD for tunnel are received.";
          }

          leaf bfd-state {
            type bfd-state-type;
            description
              "Status of dynamic BFD for RSVP-TE or SR-MPLS TE.";
          }

          leaf session-age {
            type uint32;
            description
              "Time elapsed since a BFD session was established.";
          }
        }  // list bfd-session
      }  // container bfd-sessions
    }

    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
        "Dynamic BFD configuration for TE LSP of SR-TE tunnel.";
      container bfd-for-lsp {
        description
          "Configure dynamic BFD for TE LSP Parameter of SR-TE tunnel.";
        leaf ability {
          type bfd-ability-type;
          must
            "(../ability='enable' and /bfd:bfd) or (../ability='block')";
          description
            "BFD for TE LSP enabling state.
Special explanation:
Constraint: This capability depends on the configuration of global bfd.";
        }

        leaf mode {
          when "../ability='enable'";
          type te-tunnel-bfd-for-lsp-mode;
          must
            "(../mode='seamless' and /bfd:bfd/bfd:sbfd) or (../mode='one-arm-echo') or (../mode='option-tlv')";
          description
            "BFD detect mode.
Special explanation:
In one-arm BFD, the configured min-tx-interval does not take effect.
In seamless BFD, the configured min-rx-interval does not take effect.
In option-tlv BFD, option-tlv Enable BFD detection with options.";
        }

        leaf min-tx-interval {
          type uint32 {
            range "3..1000";
          }
          units "ms";
          description
            "BFD sending interval.";
        }

        leaf min-rx-interval {
          type uint32 {
            range "3..1000";
          }
          units "ms";
          description
            "BFD receiving interval.";
        }

        leaf detect-multiplier {
          type uint32 {
            range "3..50";
          }
          default "3";
          description
            "Maximum number of BFD loss times. When BFD for TE LSP is enabled for a TE tunnel, a BFD session can be set up. If the number of lost BFD messages exceeds the maximum number of BFD loss times, the TE tunnel is considered to be faulty.";
        }

        leaf only-detection-primary {
          when "../mode='one-arm-echo'";
          type boolean;
          default "false";
          description
            "Enable/disable BFD for TE primary LSP detection.";
        }
      }  // container bfd-for-lsp

      container bfd-for-tunnel {
        must
          "(ability='enable' and mode) or not(ability='enable')";
        description
          "Configure dynamic BFD for TE tunnel parameter of SR-TE tunnels.";
        leaf ability {
          type bfd-ability-type;
          must
            "(../ability='enable' and /bfd:bfd) or (../ability='block')";
          description
            "BFD for TE LSP enabling state.
Special explanation:
Constraint: This capability depends on the configuration of global bfd.";
        }

        leaf mode {
          when "../ability='enable'";
          type te-tunnel-bfd-for-tunnel-mode;
          must
            "(../mode='seamless' and /bfd:bfd/bfd:sbfd) or (../mode='one-arm-echo')";
          default "one-arm-echo";
          description
            "BFD Detect Mode.
Special explanation:
In one-arm BFD, the configured min-tx-interval does not take effect.
In seamless BFD, the configured min-rx-interval does not take effect.";
        }

        leaf min-tx-interval {
          type uint32 {
            range "3..1000";
          }
          units "ms";
          description
            "Interval at which packets of BFD for tunnel are sent.";
        }

        leaf min-rx-interval {
          type uint32 {
            range "3..1000";
          }
          units "ms";
          description
            "Interval at which packets of BFD for tunnel are received.";
        }

        leaf detect-multiplier {
          type uint32 {
            range "3..50";
          }
          default "3";
          description
            "Maximum number of BFD for tunnel loss times. When BFD for tunnel is enabled for a TE tunnel, a BFD session can be established. If the number of lost BFD messages exceeds the maximum number of BFD loss times, the TE tunnel is considered to be faulty.";
        }
      }  // container bfd-for-tunnel

      container static-bfd-for-lsp {
        description
          "Configure static BFD initial down for TE LSP parameter of SR-TE tunnel.";
        leaf initial-down-enable {
          when "/bfd:bfd";
          type boolean;
          default "false";
          description
            "Enable/disable initial down for static BFD for LSP.";
        }
      }  // container static-bfd-for-lsp
    }

    augment /ni:network-instance/ni:instances/ni:instance/mpls:mpls/mpls-te:te/rsvp-interface:rsvp-interfaces/rsvp-interface:rsvp-interface {
      description
        "BFD for rsvp te interface config.";
      container bfd {
        description
          "Configure BFD for RSVP TE interface.";
        leaf ability {
          type bfd-ability-type;
          must
            "(../ability='enable' and /bfd:bfd) or (../ability='block')";
          description
            "MPLS RSVP-TE BFD Configuration.";
        }

        leaf min-tx-interval {
          type uint32 {
            range "3..1000";
          }
          units "ms";
          description
            "Interval for sending BFD packets.";
        }

        leaf min-rx-interval {
          type uint32 {
            range "3..1000";
          }
          units "ms";
          description
            "Interval for receiving BFD packets.";
        }

        leaf detect-multiplier {
          type uint32 {
            range "3..50";
          }
          default "3";
          description
            "Maximum number of BFD packets that can be dropped on an RSVP interface. After BFD is enabled on an RSVP-TE interface and a BFD session is established,
the interface considers that a fault occurs if the number of dropped BFD packets reaches the specified upper limit.";
        }

        leaf set-bfd-pst {
          type boolean;
          default "false";
          description
            "Enable/disable global process port.";
        }

        leaf tos-exp {
          type uint8 {
            range "0..7";
          }
          description
            "Priority for sending BFD packets.";
        }
      }  // container bfd
    }

    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
        "Dynamic BFD for TE LSP parameter augment to RSVP-TE tunnel.";
      container bfd-for-lsp {
        description
          "Configure dynamic BFD for TE LSP parameter of a tunnel.";
        leaf ability {
          type bfd-ability-type;
          must
            "(../ability='enable' and /bfd:bfd) or (../ability='block')";
          description
            "BFD for TE LSP enabling state.
Special explanation:
Constraint: This capability depends on the configuration of global bfd.";
        }

        leaf mode {
          when "../ability='enable'";
          type rsvp-te-tunnel-bfd-for-lsp-mode;
          description
            "BFD detect mode.
Special explanation:
In one-arm BFD, the configured min-tx-interval does not take effect.
In seamless BFD, the configured min-rx-interval does not take effect.
In option-tlv BFD, option-tlv Enable BFD detection with options.";
        }

        leaf min-tx-interval {
          type uint32 {
            range "3..1000";
          }
          units "ms";
          description
            "BFD sending interval.";
        }

        leaf min-rx-interval {
          type uint32 {
            range "3..1000";
          }
          units "ms";
          description
            "BFD receiving interval.";
        }

        leaf detect-multiplier {
          type uint32 {
            range "3..50";
          }
          default "3";
          description
            "Maximum number of BFD loss times. When BFD for TE LSP is enabled for a TE tunnel, a BFD session can be set up. If the number of lost BFD messages exceeds the maximum number of BFD loss times, the TE tunnel is considered to be faulty.";
        }
      }  // container bfd-for-lsp
    }

    augment /mpls:mpls/mpls-te:te/mpls-te:p2mp-templates/mpls-te:p2mp-template {
      description
        "Dynamic BFD for TE LSP parameter of P2MP template.";
      container bfd {
        description
          "Configure dynamic BFD for TE LSP parameter of P2MP template.";
        leaf enable {
          when "/bfd:bfd";
          type boolean;
          default "false";
          description
            "Enable/disable BFD for TE LSP enabling state.";
        }

        leaf min-tx-interval {
          type uint32 {
            range "3..1000";
          }
          units "ms";
          description
            "BFD sending interval.";
        }

        leaf min-rx-interval {
          type uint32 {
            range "3..1000";
          }
          units "ms";
          description
            "BFD receiving interval.";
        }

        leaf detect-multiplier {
          type uint32 {
            range "3..50";
          }
          default "3";
          description
            "Maximum number of BFD loss times. When BFD for TE LSP is enabled for a TE tunnel, a BFD session can be set up. If the number of lost BFD messages exceeds the maximum number of BFD loss times, the TE tunnel is considered to be faulty.";
        }
      }  // container bfd
    }

    augment /mpls:mpls/mpls-te:te/mpls-te:p2p-templates/mpls-te:p2p-template {
      description
        "Dynamic BFD for TE LSP parameter of P2P template.";
      container bfd {
        description
          "Configure dynamic BFD for TE LSP parameter of P2P template.";
        leaf enable {
          when "/bfd:bfd";
          type boolean;
          default "false";
          description
            "Enable/disable BFD for TE LSP enabling state.
Special explanation:
Constraint: This capability depends on the configuration of global bfd.";
        }

        leaf min-tx-interval {
          type uint32 {
            range "3..1000";
          }
          units "ms";
          description
            "BFD sending interval.";
        }

        leaf min-rx-interval {
          type uint32 {
            range "3..1000";
          }
          units "ms";
          description
            "BFD receiving interval.";
        }

        leaf detect-multiplier {
          type uint32 {
            range "3..50";
          }
          default "3";
          description
            "Maximum number of BFD loss times. When BFD for TE LSP is enabled for a TE tunnel, a BFD session can be set up. If the number of lost BFD messages exceeds the maximum number of BFD loss times, the TE tunnel is considered to be faulty.";
        }
      }  // container bfd
    }

    augment /mpls:mpls/mpls-te:te/mpls-te:rsvp {
      description
        "Dynamic BFD configuration for all rsvp interfaces.";
      container bfd-all-interfaces {
        when
          "/bfd:bfd and /mpls:mpls/mpls-te:te/mpls-te:rsvp/mpls-te:enable='true'";
        description
          "Configure BFD for all interfaces parameters.";
        leaf enable {
          type boolean;
          default "false";
          description
            "Enable/disable the enabling state of bfd for all interfaces capability.";
        }

        leaf min-tx-interval {
          type uint32 {
            range "3..20000";
          }
          units "ms";
          description
            "Interval for sending BFD packets for all interfaces.";
        }

        leaf min-rx-interval {
          type uint32 {
            range "3..20000";
          }
          units "ms";
          description
            "Interval for receiving BFD packets for all interfaces.";
        }

        leaf detect-multiplier {
          type uint32 {
            range "3..50";
          }
          default "3";
          description
            "Maximum number of times for losing global MPLS TE BFD for all interfaces packets.";
        }

        leaf process-pst {
          type boolean;
          default "false";
          description
            "Enable/disable the global pst flag.";
        }

        leaf tos-exp {
          type uint32 {
            range "0..7";
          }
          description
            "Configure the priority of the global BFD session packet.";
        }
      }  // container bfd-all-interfaces
    }
  }  // module huawei-mpls-te-bfd