module openconfig-network-instance-types {

  yang-version "1";

  // namespace
  namespace "http://openconfig.net/yang/network-instance-types";

  prefix "nit";

  import openconfig-extensions { prefix "ocext"; }

  // meta
  organization "OpenConfig working group";

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

  description
    "Types associated with a network instance";

  ocext:openconfig-version "0.1.0";

  revision "2015-10-18" {
    description
      "Initial revision";
    reference "0.1.0";
  }

  // identity statements
  identity network-instance-type {
    description
      "A base identity which can be extended to indicate different
     types of network instance supported by a device.";
  }

  identity DEFAULT-INSTANCE {
    base network-instance-type;
    description
      "A special routing instance which acts as the 'default' or
      'global' routing instance for a network device.";
  }

  identity L3VRF {
    base network-instance-type;
    description
      "A private Layer 3 only routing instance which is formed of
      one or more RIBs";
  }

  identity L2VSI {
    base network-instance-type;
    description
      "A private Layer 2 only switch instance which is formed of
      one or more L2 forwarding tables";
  }

  identity L2P2P {
    base network-instance-type;
    description
      "A private Layer 2 only forwarding instance which acts as
      a point to point connection between two endpoints";
  }


  // rjs note:
  // this should move to openconfig-types when merged
  typedef route-distinguisher {
    type union {
      // type 0: <2-byte administrator>:<4-byte assigned number>
      type string {
        pattern "(65[0-5][0-3][0-5]|[1-5][1-5][0-9][0-9][0-9]|"
                + "[1-9]?[1-9]?[0-9][0-9]|[1-9]):"
                + "(4[0-2][0-9][0-4][0-9][0-6][0-7][0-2][0-9][0-5]|"
                + "[0-3][0-9]{9}|[1-9][0-9]{1,8}|[1-9])";
      }
      // type 1: <ip-address>:<2-byte assigned number>
      type string {
        pattern
          "(([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])\.){3}"
          +  "([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5]):"
          +  "(65[0-5][0-3][0-5]|[1-5][1-5][0-9][0-9][0-9]|"
          +  "[1-9]?[1-9]?[0-9][0-9]|[1-9])";
      }
      // type 2: <4-byte as-number>:<2-byte assigned number>
      type string {
        pattern
          "(4[0-2][0-9][0-4][0-9][0-6][0-7][0-2][0-9][0-5]|"
          + "[0-3][0-9]{9}|[1-9][0-9]{1,8}|[1-9]):"
          + "(65[0-5][0-3][0-5]|[1-5]{2}[0-9]{3}|"
          + "[1-9]{0,2}[0-9][0-9]|[1-9])";
      }
    }
    description "A route distinguisher value";
    reference "RFC4364";
  }

}