module openconfig-spanning-tree-types {

    yang-version 1;

    namespace
      "http://openconfig.net/yang/spanning-tree/types";

    prefix oc-stp-types;

    import openconfig-extensions {
      prefix oc-ext;
    }

    organization "OpenConfig working group";

    contact
      "OpenConfig working group
www.openconfig.net";

    description
      "This module defines types related to the
spanning-tree protocol model.";

    revision "2018-11-21" {
      description
        "Add OpenConfig module metadata extensions.";
      reference
        "0.2.1";

    }

    revision "2017-07-14" {
      description
        "Migrated to OpenConfig types; fixed missing applied state
in rapid-pvst";
      reference
        "0.2.0";

    }

    revision "2016-10-03" {
      description "Initial public revision";
      reference
        "0.1.0";

    }

    oc-ext:openconfig-version "0.2.1";
    oc-ext:regexp-posix;
    oc-ext:catalog-organization "openconfig";
    oc-ext:origin "openconfig";

    identity STP_PROTOCOL {
      description
        "base identity for support spanning tree protocol";
    }

    identity MSTP {
      base STP_PROTOCOL;
      description
        "Multiple Spanning Tree Protocol";
      reference
        "IEEE 802.1Q 13";

    }

    identity RAPID_PVST {
      base STP_PROTOCOL;
      description
        "Rapid Per Vlan Spanning Tree Protocol";
    }

    identity STP_PORT_STATE {
      description
        "base identity for the different Spanning Tree Protocol port
states";
      reference
        "IEEE 802.1D 7.4 Port States and the active topology";

    }

    identity DISABLED {
      base STP_PORT_STATE;
      description
        "A port that is manually isolated from the network";
    }

    identity LISTENING {
      base STP_PORT_STATE;
      description
        "Processing BPDUs and building active toplogy";
    }

    identity LEARNING {
      base STP_PORT_STATE;
      description
        "Building bridging tables; no forwarding of data";
    }

    identity BLOCKING {
      base STP_PORT_STATE;
      description
        "A port that would cause a loop if it were sending data,
so it is only receiving BPDUs, untill a topology change
removes the possibliity of a loop";
    }

    identity FORWARDING {
      base STP_PORT_STATE;
      description
        "Sending and receiving data, normal operation";
    }

    identity STP_EDGE_PORT {
      description
        "base identity for the different edge port modes";
      reference
        "IEEE 802.1D 17.13.1";

    }

    identity EDGE_ENABLE {
      base STP_EDGE_PORT;
      description
        "Enable edge port for the bridge port";
    }

    identity EDGE_DISABLE {
      base STP_EDGE_PORT;
      description
        "Disable edge port for the bridge port";
    }

    identity EDGE_AUTO {
      base STP_EDGE_PORT;
      description
        "Enable edge port autodetction for the bridge port";
    }

    identity STP_PORT_ROLE {
      description
        "Base identity for the different Spanning Tree Protocol port
roles";
      reference
        "IEEE 802.1D 17.7 Port Role assignments";

    }

    identity ROOT {
      base STP_PORT_ROLE;
      description
        "The port that receives the best BPDU on a bridge is the
root port";
    }

    identity DESIGNATED {
      base STP_PORT_ROLE;
      description
        "A port is designated if it can send the best BPDU on the
segment to which it is connected.";
    }

    identity ALTERNATE {
      base STP_PORT_ROLE;
      description
        "An alternate port receives more useful BPDUs from another
bridge and is a port blocked";
    }

    identity BACKUP {
      base STP_PORT_ROLE;
      description
        "A backup port receives more useful BPDUs from the same
bridge it is on and is a port blocked";
    }

    typedef stp-bridge-priority-type {
      type uint32 {
        range "1..61440";
      }
      description
        "The manageable component of the Bridge Identifier";
      reference
        "IEEE 802.1D 17.13.7 Bridge Identifier Priority";

    }

    typedef stp-port-priority-type {
      type uint8 {
        range "1..240";
      }
      description
        "The manageable component of the Port Identifier,
also known as the Port Priority";
      reference
        "IEEE 802.1D 17.13.10 Port Identifier Priority";

    }

    typedef stp-guard-type {
      type enumeration {
        enum "ROOT" {
          value 0;
          description "Enable root guard";
        }
        enum "LOOP" {
          value 1;
          description "Enable loop guard";
        }
        enum "NONE" {
          value 2;
          description "disable guard";
        }
      }
      description
        "Type definition for the different STP guard for the switch port";
      reference
        "IEEE 802.1D 17.2";

    }

    typedef stp-link-type {
      type enumeration {
        enum "P2P" {
          value 0;
          description "Point-to-Point link";
        }
        enum "SHARED" {
          value 1;
          description "Shared link";
        }
      }
      description
        "Type definition for the different link types";
      reference
        "IEEE 802.1D 17.2";

    }
  }  // module openconfig-spanning-tree-types