module huawei-isis-sr {

    yang-version 1;

    namespace
      "urn:huawei:yang:huawei-isis-sr";

    prefix isis-sr;

    import huawei-ifm {
      prefix ifm;
    }
    import huawei-network-instance {
      prefix ni;
    }
    import huawei-isis {
      prefix isis;
    }
    import huawei-routing-policy {
      prefix rtp;
    }
    import huawei-segment-routing {
      prefix sr;
    }
    import huawei-extension {
      prefix ext;
    }
    import ietf-inet-types {
      prefix inet;
    }

    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
      "ISIS segment routing management.";

    revision "2020-03-09" {
      description "Modify the description.";
      reference
        "Huawei private.";

    }

    revision "2020-03-03" {
      description "Modify the description.";
      reference
        "Huawei private.";

    }

    revision "2020-02-04" {
      description "Modify the description.";
      reference
        "Huawei private.";

    }

    revision "2019-04-04" {
      description "Initial revision.";
      reference
        "Huawei private.";

    }

    ext:task-name "isis";

    typedef lsp-trigger-type {
      type enumeration {
        enum "host" {
          value 0;
          description
            "Trigger SR LSP establishment for 32 bit host routes.";
        }
        enum "none" {
          value 2;
          description
            "Do not trigger SR LSP establishment.";
        }
        enum "ip-prefix" {
          value 4;
          description
            "Trigger SR LSP establishment based on an IP prefix list.";
        }
      }
      description
        "ISIS SR LSP trigger type.";
    }

    typedef prefix-sid-type {
      type enumeration {
        enum "absolute" {
          value 1;
          description "Absolute value.";
        }
        enum "index" {
          value 2;
          description "Index.";
        }
      }
      description "ISIS prefix sid type.";
    }

    augment /ni:network-instance/ni:instances/ni:instance/isis:isis/isis:sites/isis:site {
      description
        "ISIS SRGB augment to ISIS.";
      container srgbs {
        when
          "../../../../sr:segment-routing/sr:enable='true' and (../isis:cost-style='wide' or ../isis:cost-style='transition' or ../isis:cost-style='wtransition')";
        description
          "List of segment routing global block.";
        list srgb {
          key "lower-bound upper-bound";
          max-elements 1;
          description
            "Configure segment routing global block.";
          leaf lower-bound {
            type uint32 {
              range "16..1048575";
            }
            must
              "../lower-bound<../upper-bound";
            description "SRGB begin value.";
          }

          leaf upper-bound {
            type uint32 {
              range "16..1048575";
            }
            must
              "../lower-bound<../upper-bound";
            description "SRGB end value.";
          }
        }  // list srgb
      }  // container srgbs
    }

    augment /ni:network-instance/ni:instances/ni:instance/isis:isis/isis:sites/isis:site/isis:afs/isis:af {
      description
        "ISIS segment routing augment to ISIS.";
      container segment-routing {
        when "../isis:type='afipv4'";
        description
          "Configure ISIS segment routing.";
        leaf enable {
          type boolean;
          must
            "../enable='false' or ../../../../../../../ni:name='_public_' and ../../../../../../../sr:segment-routing/sr:enable='true' and (../../../../isis:cost-style='wide' or ../../../../isis:cost-style='transition' or ../../../../isis:cost-style='wtransition')";
          default "false";
          description
            "Enable/disable segment routing MPLS.";
        }

        leaf auto-adj-sid {
          when "../enable='true'";
          type boolean;
          default "true";
          description
            "Enable/disable apply adj label when build adjency.";
        }

        leaf adv-static-sid {
          when "../enable='true'";
          type boolean;
          default "false";
          description
            "Enable/disable ISIS to advertise static SID capabilities, support static adjacency SID distribution in LSP.";
        }

        container binding {
          when "../enable='true'";
          description
            "Configure ISIS segment routing.";
          leaf receive {
            type boolean;
            default "true";
            description
              "Enable/disable receive remote prefix SID mappings.";
          }

          leaf advertise {
            type boolean;
            default "false";
            description
              "Enable/disable advertise active local prefix SID mappings.";
          }
        }  // container binding

        container lsp-trigger {
          when "../enable='true'";
          description
            "Configure the SR LSP trigger command.";
          leaf type {
            type lsp-trigger-type;
            must
              "../type!='ip-prefix' or ../ip-prefix";
            default "host";
            description
              "Set the SR LSP trigger type.";
          }

          leaf ip-prefix {
            when "../type='ip-prefix'";
            type leafref {
              path "/rtp:routing-policy/rtp:ipv4-prefix-filters/rtp:ipv4-prefix-filter/rtp:name";
            }
            description
              "Set the IP prefix name.";
          }
        }  // container lsp-trigger

        container inter-level-protect {
          when
            "../../isis:frr/isis:enable='true' and ../isis-sr:enable='true'";
          description
            "Configure Inter-Level-Protect.";
          leaf enable-level1 {
            type boolean;
            default "false";
            description
              "Enable/disable Level 1 Inter-Level-Protect.";
          }

          leaf preferred {
            type boolean;
            must
              "../enable-level1='true' or ../preferred='false'";
            default "false";
            description
              "Enable/disable Inter-Level-Protect Preferred.";
          }
        }  // container inter-level-protect

        container sbfd-source {
          when "../enable='true'";
          description
            "Configure source address for Seamless Bidirectional Forwarding Detection.";
          leaf address {
            type inet:ipv4-address-no-zone;
            description
              "Source address. Only permit A/B/C Class address and exclude invalid IP addresses in the 0.1.1.1 and 127 network segments.";
          }
        }  // container sbfd-source
      }  // container segment-routing
    }

    augment /ni:network-instance/ni:instances/ni:instance/isis:isis/isis:sites/isis:site/isis:avoid-micro-loop {
      description
        "ISIS avoid-microloop segment routing augment to ISIS.";
      leaf sr-enable-flag {
        type boolean;
        must
          "../sr-enable-flag='false' or ../../isis:afs/isis:af[isis:type='afipv4']/isis-sr:segment-routing/isis-sr:enable='true'";
        default "false";
        description
          "Enable/disable SR avoid microloop. Depend on segment routing MPLS.";
      }

      leaf sr-new-update-delay {
        type uint16 {
          range "1000..60000";
        }
        units "ms";
        default "5000";
        description
          "Set the route delivery delay for SR avoid microloop. Depend on segment routing MPLS.";
      }
    }

    augment /ni:network-instance/ni:instances/ni:instance/isis:isis/isis:sites/isis:site/isis:circuits/isis:circuit/isis:afs/isis:af {
      description
        "ISIS prefix sid augment to ISIS.";
      container prefix-sids {
        when
          "../../../../../isis:afs/isis:af[isis:type='afipv4']/isis-sr:segment-routing/isis-sr:enable='true' and /ifm:ifm/ifm:interfaces/ifm:interface[ifm:name=current()/../../../isis:name]/ifm:type='LoopBack' and ../isis:type='afipv4'";
        description
          "List of prefix segment ID. Only on the Loopback interface.";
        list prefix-sid {
          key "algorithm";
          unique "type label";
          description
            "Configure prefix segment ID.";
          leaf algorithm {
            type uint8 {
              range "0 | 128..255";
            }
            must
              "../algorithm=0 or (../algorithm!=0 and ../../../../../../../isis:fad-bindings/isis:fad-binding[isis:flex-algo-id=current()])";
            description
              "Prefix sid algorithm.";
          }

          leaf type {
            type prefix-sid-type;
            mandatory true;
            description
              "Set the type of prefix sid.";
          }

          leaf label {
            type uint32 {
              range "0..1048575";
            }
            mandatory true;
            description
              "Set the label of prefix sid.";
          }

          leaf node-flag {
            type boolean;
            default "true";
            description
              "Enable/disable the node flag.";
          }
        }  // list prefix-sid
      }  // container prefix-sids
    }
  }  // module huawei-isis-sr