ietf-mpls-static.yang

module ietf-mpls-static {

  namespace "urn:ietf:params:xml:ns:yang:ietf-mpls-static";

  prefix "mpls-static";

  import ietf-mpls {
    prefix mpls;
  }

  import ietf-routing {
    prefix "rt";
  }

  import ietf-inet-types {
    prefix inet;
  }

  import ietf-interfaces {
    prefix "if";
  }

  /* Import TE generic types */
  import ietf-te {
    prefix te;
  }

  organization "IETF MPLS Working Group";

  contact
    "WG Web:   <http://tools.ietf.org/wg/mpls/>

     WG List:  <mailto:mpls@ietf.org>

     WG Chair: Loa Andersson
               <mailto:loa@pi.nu>

     WG Chair: Ross Callon
               <mailto:rcallon@juniper.net>

     WG Chair: George Swallow
               <mailto:swallow.ietf@gmail.com>

     Editor:   Tarek Saad
               <mailto:tsaad@cisco.com>

     Editor:   Kamran Raza
               <mailto:skraza@cisco.com>

     Editor:   Rakesh Gandhi
               <mailto:rgandhi@cisco.com>

     Editor:   Xufeng Liu
               <mailto: xufeng.liu.ietf@gmail.com>

     Editor:   Vishnu Pavan Beeram
               <mailto:vbeeram@juniper.net>

     Editor:   Himanshu Shah
               <mailto:hshah@ciena.com>

     Editor:   Igor Bryskin
               <mailto: Igor.Bryskin@huawei.com>

     Editor:   Xia Chen
               <mailto:jescia.chenxia@huawei.com>

     Editor:   Raqib Jones
               <mailto:raqib@Brocade.com>

     Editor:   Bin Wen
               <mailto:Bin_Wen@cable.comcast.com>";

  description
     "This YANG module augments the 'ietf-routing' module with basic
     configuration and operational state data for MPLS static";

  revision "2016-07-05" {
    description
      "Latest revision:
        - Addressed MPLS-RT review comments";
    reference "RFC 3031: A YANG Data Model for Static MPLS LSPs";
  }

  typedef static-lsp-ref {
    type leafref {
      path "/rt:routing/mpls:mpls/mpls-static:static-lsps/" + 
           "mpls-static:static-lsp/mpls-static:name";
    }
    description
      "This type is used by data models that need to reference
       configured static LSP.";
  }

  grouping path-basic_config {
    description "common definitions for statics";

    leaf next-hop {
      type inet:ip-address;
      description "next hop IP address for the LSP";
    }

    leaf outgoing-label {
      type mpls:mpls-label;
      description 
        "label value to push at the current hop for the
         LSP";
    }

    leaf outgoing-interface {
      type if:interface-ref;
      description
        "The outgoing interface";
    }
  }

  grouping path-properties_config {
    description
      "MPLS path properties";
    leaf path-index {
      type uint16;
      description
        "Path identifier";
    }

    leaf backup-path-index {
      type uint16;
      description
        "Backup path identifier";
    }

    leaf next-hop {
      type inet:ip-address;
      description
        "The address of the next-hop";
    }

    leaf-list outgoing-labels {
      type mpls:mpls-label;
      ordered-by user;
      description
        "The outgoing MPLS labels to impose";
    }

    leaf outgoing-interface {
      type if:interface-ref;
      description
        "The outgoing interface";
    }

    leaf loadshare {
      type uint16;
      description
        "This value is used to compute a loadshare to perform un-equal
         load balancing when multiple outgoing path(s) are specified. A
         share is computed as a ratio of this number to the total under
         all configured path(s).";
    }

    leaf role {
      type enumeration {
        enum PRIMARY {
          description
            "Path as primary traffic carrying";
        }
        enum BACKUP {
          description
            "Path acts as backup";
        }
        enum PRIMARY_AND_BACKUP {
          description
            "Path acts as primary and backup simultaneously";
        }
      }
      description
        "The MPLS path role";
    }
  }

  grouping static-lsp_config {
    description "common definitions for static LSPs";

    container in-segment {
      description
        "MPLS incoming segment";
      choice type {
        description
          "Basic FEC choice";
        case ip-prefix {
          leaf ip-prefix {
            type inet:ip-prefix;
            description "An IP prefix";
          }
        }
        case mpls-label {
          leaf incoming-label {
            type mpls:mpls-label;
            description "label value on the incoming packet";
          }
        }
        case tunnel {
          leaf tunnel {
            type te:tunnel-ref;
            description "TE tunnel FEC mapping";
          }
        }
      }
      leaf incoming-interface {
        type if:interface-ref;
        description
          "Optional incoming interface if FEC is restricted
           to traffic incoming on a specific interface";
      }
    }

    leaf operation {
      type enumeration {
        enum impose-and-forward {
          description 
            "Operation impose outgoing label(s) and forward to
             next-hop";
        }
        enum pop-and-forward {
          description
            "Operation pop incoming label and forward to next-hop";
        }
        enum pop-impose-and-forward {
          description
            "Operation pop incoming label, impose one or more
             outgoing label(s) and forward to next-hop";
        }
        enum swap-and-forward {
          description
            "Operation swap incoming label, with outgoing label and
             forward to next-hop";
        }
        enum pop-and-lookup {
          description
            "Operation pop incoming label and perform a lookup";
        }
      }
      description
        "The MPLS operation to be executed on the incoming packet";
    }

    choice out-segment {
      description "The MPLS out-segment type choice";
      case simple-path {
        uses path-basic_config;
      }
      case path-list {
        list paths {
          key path-index;
          description
            "The list of MPLS paths associated with the FEC";
          uses path-properties_config;
        }
      }
    }
  }

  grouping static-lsp {
    description "grouping for top level list of static LSPs";
    container config {
      description
        "Holds the intended configuration";
      uses static-lsp_config;
    }
    container state {
      config false;
      description
        "Holds the state and inuse configuration";
      uses static-lsp_config;
    }
  }

  augment "/rt:routing/mpls:mpls" {
    description "Augmentations for MPLS Static LSPs";
    container static-lsps {
      description
        "Statically configured LSPs, without dynamic signaling";
      list static-lsp {
        key name;
        description "list of defined static LSPs";

        leaf name {
          type string;
          description "name to identify the LSP";
        }
        uses static-lsp;
      }
    }
  }
}