module openconfig-network-instance-types {

  yang-version "1";

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

  prefix "oc-ni-types";

  import openconfig-extensions { prefix "oc-ext"; }

  // meta
  organization "OpenConfig working group";

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

  description
    "Types associated with a network instance";

  oc-ext:openconfig-version "0.8.0";

  revision "2017-02-28" {
    description
      "Add OSPFv2 to network instance";
    reference "0.8.0";
  }

  revision "2017-01-26" {
    description
      "Add policy forwarding to network instance";
    reference "0.7.0";
  }

  revision "2017-01-13" {
    description
      "Add AFT to the network instance";
    reference "0.6.0";
  }

  revision "2016-12-15" {
    description
      "Add segment routing to network instance";
    reference "0.5.0";
  }

  revision "2016-11-10" {
    description
      "Update model to include IS-IS.";
    reference "0.4.1";
  }

  revision "2016-10-12" {
    description
      "Update table connections";
    reference "0.4.0";
  }

  revision "2016-09-28" {
    description
      "Change L2 instance to submodule; add MAC table";
    reference "0.3.0";
  }

  revision "2016-08-11" {
    description
      "Resolve repeated container names in routing protocols";
    reference "0.2.3";
  }

  revision "2016-07-08" {
    description
      "Updated with refactored routing protocol models";
    reference "0.2.1";
  }

  revision "2016-03-29" {
    description
      "Initial revision";
    reference "0.2.0";
  }

  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";
  }

  identity L2L3 {
    base NETWORK_INSTANCE_TYPE;
    description
      "A private Layer 2 and Layer 2 forwarding instance";
  }

  identity ENDPOINT_TYPE {
    description
      "Specification of the type of endpoint that is being associated
      with a network instance";
  }

  identity LOCAL {
    base ENDPOINT_TYPE;
    description
      "A local interface which is being associated with the endpoint";
  }

  identity REMOTE {
    base ENDPOINT_TYPE;
    description
      "A remote interface which is being associated with the
      endpoint";
  }

  identity LABEL_ALLOCATION_MODE {
    description
      "Base identity to be used to express types of label allocation
      strategies to be used within a network instance";
  }

  identity PER_PREFIX {
    base LABEL_ALLOCATION_MODE;
    description
      "A label is to be allocated per prefix entry in the RIB for the
      network instance";
  }

  identity PER_NEXTHOP {
    base LABEL_ALLOCATION_MODE;
    description
      "A label is to be allocated per nexthop entry in the RIB for
      the network instance";
  }

  identity INSTANCE_LABEL {
    base LABEL_ALLOCATION_MODE;
    description
      "A single label is to be used for the instance";
  }

  identity ENCAPSULATION {
    description
      "On the wire encapsulations that can be used when
      differentiating network instances";
  }

  identity MPLS {
    base ENCAPSULATION;
    description
      "Use MPLS labels to distinguish network instances on the wire";
  }

  identity VXLAN {
    base ENCAPSULATION;
    description
      "Use VXLAN (RFC7348) VNIs to distinguish network instances on
      the wire";
  }

  identity SIGNALLING_PROTOCOL {
    description
      "The signalling protocol that should be used to diseminate
      entries within a forwarding instance";
  }

  identity LDP {
    base SIGNALLING_PROTOCOL;
    description
      "Use LDP-based setup for signalling. Where the instance is
      a point-to-point service this refers to RFC4447 ('Martini')
      setup. Where the service is an L2VSI, or L2L3 instance it
      refers to RFC4762 LDP-signalled VPLS instances";
  }

  identity BGP_VPLS {
    base SIGNALLING_PROTOCOL;
    description
      "Use BGP-based signalling and autodiscovery for VPLS instances
      as per RFC4761";
  }

  identity BGP_EVPN {
    base SIGNALLING_PROTOCOL;
    description
      "Use BGP-based Ethernet VPN (RFC7432) based signalling for
      the network instance";
  }

  // 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";
  }
}