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module dot1q-types {
  namespace "urn:ieee:params:xml:ns:yang:dot1q-types";
  prefix dot1q;

  organization
    "Cisco Systems, Inc.
     Customer Service

     Postal: 170 W Tasman Drive
     San Jose, CA 95134

     Tel: +1 1800 553-NETS

     E-mail: cs-yang@cisco.com";

  contact
    "Robert Wilton - rwilton@cisco.com";

  description
    "This module contains a collection of generally useful YANG types
     that are specific to 802.1Q VLANs that can be usefully shared
     between multiple models.

     Terms and Acronyms

     802.1Q: IEEE 802.1Q VLANs

     VLAN (vlan): Virtual Local Area Network
     ";

  revision 2015-06-26 {
    description "Latest revision, changed namespace";

    reference "Intended to be standardized IEEE 802.1";
  }

  typedef PCP {
    type uint8 {
      range "0..7";
    }
    description
      "Priority Code Point. PCP is a 3-bit field that refers to the
       class of service applied to an 802.1Q VLAN tagged frame.  The
       field specifies a priority value between 0 and 7, these values
       can be used by quality of service (QoS) to prioritize
       different classes of traffic.";
    reference "IEEE 802.1Q (2014)";
  }

  /*
   * Defines what it means to be an 802.1Q VLAN Id, where values 0
   * and 4095 are reserved.
   */
  typedef dot1q-vlan-id {
    type uint16 {
      range "1..4094";
    }
    description "An 802.1Q VLAN Identifier";
    reference "IEEE 802.1Q (2014)";
  }

  /*
   * Defines the supported IEEE 802.1Q types that can be used for
   * VLAN tag matching.
   */
  identity dot1q-tag-vlan-type {
    description "Base identity from which all 802.1Q VLAN tag types
                 are derived from";
  }

  identity c-vlan {
    base dot1q-tag-vlan-type;
    description
      "An 802.1Q Customer-VLAN tag, normally using the 0x8100
       Ethertype";
  }

  identity s-vlan {
    base dot1q-tag-vlan-type;
    description
      "An 802.1Q Service-VLAN tag, using the 0x88a8 Ethertype
       originally introduced in 802.1ad, and incorporated into
       802.1Q (2011)";
  }

  typedef dot1q-tag-type {
    type identityref {
      base "dot1q-tag-vlan-type";
    }
    description "Identifies a specific 802.1Q tag type";
    reference "IEEE 802.1Q (2014)";
  }

  /*
   * Defines the type used to represent ranges of VLAN Ids.
   *
   * Ideally we would model that as a list of VLAN Ids in YANG, but
   * the model is easier to use if this is just represented as a
   * string.
   *
   * This type is used to match an ordered list of VLAN Ids, or
   * contiguous ranges of VLAN Ids.  Valid VLAN Ids must be in the
   * range 1 to 4094, and included in the list in non overlapping
   * ascending order.
   *
   * E.g. "1, 10-100, 50, 500-1000"
   */
  typedef dot1q-vlan-id-ranges {
    type string {
      pattern "([0-9]{1,4}(-[0-9]{1,4})?(,[0-9]{1,4}" +
              "(-[0-9]{1,4})?)*)";
    }
    description "A list of VLAN Ids, or non overlapping VLAN ranges,
                 in ascending order, between 1 and 4094";
  }

  /*
   * A grouping which represents an 802.1Q VLAN tag, matching both
   * the tag Ethertype and a single VLAN Id.  The PCP and DEI fields
   * in the 802.1Q tag are ignored for tag matching purposes.
   */
  grouping dot1q-tag {
    description "Grouping to allow configuration to identify a single
                 802.1Q VLAN tag";
    container dot1q-tag {
      description "Identifies an 802.1Q VLAN tag with an explicit
                   tag-type and a single VLAN Id";
      leaf tag-type {
        type dot1q-tag-type;
        mandatory true;
        description "VLAN tag type";
      }
      leaf vlan-id {
        type dot1q-vlan-id;
        mandatory true;
        description "VLAN Id";
      }
    }
  }

  /*
   * A grouping which represents an 802.1Q VLAN tag, matching both
   * the tag Ethertype and a single VLAN Id or "any" to match on any
   * VLAN Id.  The PCP and DEI fields in the 802.1Q tag are ignored
   * for tag matching purposes.
   */
  grouping dot1q-tag-or-any {
    description "Grouping to allow configuration to identify a single
                 802.1Q VLAN tag or the 'any' value to match any VLAN
                 Id not matched by a more specific VLAN Id match";
    container dot1q-tag {
      description "Identifies an 802.1Q VLAN tag with an explicit
                   tag-type and a single VLAN Id, or 'any' VLAN Id";
      leaf tag-type {
        type dot1q-tag-type;
        mandatory true;
        description "VLAN tag type";
      }
      leaf vlan-id {
        type union {
          type dot1q-vlan-id;
          type enumeration {
            enum "any" {
              value 4096;
              description
                "Matches 'any' VLAN tag in the range 1 to 4094 that
                 is not matched by a more specific VLAN Id match";
            }
          }
        }
        mandatory true;
        description "VLAN Id or any";
      }
    }
  }

  /*
   * A grouping which represents an 802.1Q tag that matches a range
   * of VLAN Ids.  The PCP and DEI fields in the 802.1Q tag are
   * ignored for tag matching purposes.
   */
  grouping dot1q-tag-ranges {
    description "Grouping to allow configuration to identify an
                 802.1Q VLAN tag that matches any VLAN Id within a
                 set of non overlapping VLAN Id ranges";
    container dot1q-tag {
      description "Identifies an 802.1Q VLAN tag with an explicit
                   tag-type and and a range of VLAN Ids";
      leaf tag-type {
        type dot1q-tag-type;
        mandatory true;
        description "VLAN tag type";
      }
      leaf vlan-ids {
        type dot1q-vlan-id-ranges;
        mandatory true;
        description "VLAN Ids";
      }
    }
  }

  /*
   * A grouping which represents an 802.1Q VLAN tag, matching both
   * the tag Ethertype and a single VLAN Id, ordered list of ranges,
   * or "any" to match on any VLAN Id.  The PCP and DEI fields in the
   * 802.1Q tag are ignored for tag matching purposes.
   */
  grouping dot1q-tag-ranges-or-any {
    description "Grouping to allow configuration to identify an
                 802.1Q VLAN tag that matches any specific VLAN Id
                 within a set of non overlapping VLAN Id ranges, or
                 the 'any' value to match any VLAN Id";
    container dot1q-tag {
      description "Identifies an 802.1Q VLAN tag with an explicit
                   tag-type, an ordered list of VLAN Id ranges, or
                   'any' VLAN Id";
      leaf tag-type {
        type dot1q-tag-type;
        mandatory true;
        description "VLAN tag type";
      }
      leaf vlan-id {
        type union {
          type dot1q-vlan-id-ranges;
          type enumeration {
            enum "any" {
              description "Matches 'any' VLAN tag in the range 1 to
                           4094";
            }
          }
        }
        mandatory true;
        description "VLAN Ids or any";
      }
    }
  }
}