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ietf-dhcpv6@2017-10-26



  module ietf-dhcpv6 {

    yang-version 1;

    namespace
      "urn:ietf:params:xml:ns:yang:ietf-dhcpv6";

    prefix dhcpv6;

    import ietf-inet-types {
      prefix inet;
      revision-date "2013-07-15";
    }
    import ietf-yang-types {
      prefix yang;
      revision-date "2013-07-15";
    }

    organization "dhc wg";

    contact
      "yong@csnet1.cs.tsinghua.edu.cn
    wangh13@mails.tsinghua.edu.cn
    lh.sunlinh@gmail.com
    Ted.Lemon@nominum.com
    ian.farrer@telekom.de
    sladjana.zechlin@telekom.de";

    description
      "This model defines a YANG data model that can be
    used to configure and manage DHCPv6 server, DHCPv6 relay and
    DHCPv6 client.";

    revision "2017-10-26" {
      description
        "version09: resolve feedbacks from IETF96";
      reference
        "I-D: draft-ietf-dhc-dhcpv6-yang-04";

    }

    revision "2016-06-18" {
      description
        "version08: resolve yang compiling error:
      top-level node must not be mandatory, wait for YANG
      doctor's review";
      reference
        "I-D: draft-ietf-dhc-dhcpv6-yang-03";

    }

    revision "2016-06-15" {
      description
        "version07: resolve yang compiling errors, wait
      for YANG doctor's review";
      reference
        "I-D: draft-ietf-dhc-dhcpv6-yang-02";

    }

    revision "2016-03-21" {
      description
        "version06: resolve feedbacks from IETF94";
      reference
        "I-D: draft-ietf-dhc-dhcpv6-yang-01";

    }

    revision "2015-10-16" {
      description
        "version05: Omit the feature statement. Modify
      model according to comments from Huawei. Also correct some
      grammar errors.";
      reference
        "I-D: draft-ietf-dhc-dhcpv6-yang-00";

    }

    revision "2015-09-25" {
      description
        "version04: Correct duid and grammar errors.";
      reference
        "I-D: draft-cui-dhc-dhcpv6-yang-04";

    }

    revision "2015-07-01" {
      description
        "version03: Correct grammar errors.";
      reference
        "I-D: draft-cui-dhc-dhcpv6-yang-03";

    }

    revision "2015-04-13" {
      description
        "version02: Correct grammar errors.";
      reference
        "I-D: draft-cui-dhc-dhcpv6-yang-02";

    }

    revision "2015-04-02" {
      description
        "version01: Correct grammar errors, Reuse
      groupings, Update 'dhcpv6-relay' feature, Add
      notifications.";
      reference
        "I-D: draft-cui-dhc-dhcpv6-yang-01";

    }

    revision "2015-03-04" {
      description
        "version00: Initial revision.";
      reference
        "I-D: draft-cui-dhc-dhcpv6-yang-00";

    }


    typedef threshold {
      type union {
        type uint16 {
          range "0..100";
        }
        type enumeration {
          enum "disabled" {
            value 0;
            description "No threshold";
          }
        }
      }
      description
        "Threshold value in percent";
    }

    grouping vendor-infor {
      description "Vendor information.";
      container vendor-info {
        description "";
        leaf ent-num {
          type uint32;
          mandatory true;
          description "enterprise number";
        }

        leaf-list data {
          type string;
          description "specific vendor info";
        }
      }  // container vendor-info
    }  // grouping vendor-infor

    grouping duid {
      description "DHCP Unique Identifier";
      reference
        "RFC3315: Section 9";

      choice duid-type {
        description
          "Selects the format for the DUID.";
        case duid-llt {
          description
            "DUID Based on Link-layer Address Plus Time";
          reference
            "RFC3315 Section 9.2";

          leaf duid-llt-hardware-type {
            type uint16;
            description
              "Hardware type as assigned by IANA (RFC826).";
          }

          leaf duid-llt-time {
            type yang:timeticks;
            description
              "The time value is the time that the DUID is generated
            represented in seconds since midnight (UTC), January 1, 2000,
                        modulo 2^32.";
          }

          leaf duid-llt-link-layer-addr {
            type yang:mac-address;
            description
              "Link-layer address as described in RFC2464";
          }
        }  // case duid-llt

        case duid-en {
          description
            "DUID Assigned by Vendor Based on Enterprise Number";
          reference
            "RFC3315 Section 9.3";

          leaf duid-en-enterprise-number {
            type uint32;
            description
              "Vendor's registered Private Enterprise Number as
            maintained by IANA";
          }

          leaf duid-en-identifier {
            type string;
            description
              "Indentifier, unique to the device that is using it";
          }
        }  // case duid-en

        case duid-ll {
          description
            "DUID Based on Link-layer Address";
          reference
            "RFC3315 Section 9.4";

          leaf duid-ll-hardware-type {
            type uint16;
            description
              "Hardware type as assigned by IANA (RFC826).";
          }

          leaf duid-ll-time {
            type yang:timeticks;
            description
              "The time value is the time that the DUID is generated
            represented in seconds since midnight (UTC), January 1, 2000,
                        modulo 2^32.";
          }
        }  // case duid-ll
      }  // choice duid-type
    }  // grouping duid

    grouping portset-para {
      description "portset parameters";
      container port-parameter {
        description "port parameter";
        leaf offset {
          type uint8;
          mandatory true;
          description "offset in a port set";
        }

        leaf psid-len {
          type uint8;
          mandatory true;
          description "length of a psid";
        }

        leaf psid {
          type uint16;
          mandatory true;
          description "psid value";
        }
      }  // container port-parameter
    }  // grouping portset-para

    container server {
      presence "Enables server";
      description "dhcpv6 server portion";
      container serv-attributes {
        description
          "This container contains basic attributes
        of a DHCPv6 server such as DUID, server name and so
        on. Some optional functions that can be provided by
        the server is also included.";
        leaf name {
          type string;
          description "server's name";
        }

        container duid {
          description "Sets the DUID";
          uses duid;
        }  // container duid

        leaf-list ipv6-address {
          type inet:ipv6-address;
          description
            "Server's IPv6 address.";
        }

        leaf description {
          type string;
          description
            "Description of the server.";
        }

        leaf pd-function {
          type boolean;
          mandatory true;
          description
            "Whether the server can act as a
          delegating router to perform prefix delegation
          ([RFC3633]).";
        }

        leaf stateless-service {
          type boolean;
          mandatory true;
          description
            "A boolean value specifies whether
          the server support client-server exchanges
          involving two messages defined in ([RFC3315]).";
        }

        leaf rapid-commit {
          type boolean;
          mandatory true;
          description
            "A boolean value specifies whether
          the server support client-server exchanges
          involving two messages defined in ([RFC3315]).";
        }

        leaf-list interfaces-config {
          type string;
          description
            "A leaf list to denote which one or
          more interfaces the server should listen on. The
          default value is to listen on all the interfaces.
          This node is also used to set a unicast address
          for the server to listen with a specific interface.
            For example, if people want the server to listen
              on a unicast address with a specific interface, he
              can use the format like 'eth1/2001:db8::1'.";
        }

        uses vendor-infor;
      }  // container serv-attributes

      container option-sets {
        description
          "DHCPv6 employs various options to carry
        additional information and parameters in DHCP messages.
        This container defines all the possible options that
        need to be configured at the server side.";
        list option-set {
          key "option-set-id";
          description
            "A server may allow different option
          sets to be configured for different conditions
          (i.e. different networks, clients and etc). This
          'option-set' list enables various sets of options
          being defined and configured in a single server.
          Different sets are distinguished by the key called
          'option-set-id'. All the possible options discussed
          above are defined in the list and each option is
          corresponding to a container.";
          leaf option-set-id {
            type uint8;
            mandatory true;
            description
              "the option-set-id key";
          }

          list new-or-standard-option {
            key "option-code";
            description
              "new or standard option";
            leaf option-code {
              type uint16;
              mandatory true;
              description
                "the option code key";
            }

            leaf option-name {
              type string;
              mandatory true;
              description
                "the new option's name";
            }

            leaf option-description {
              type string;
              mandatory true;
              description
                "description of new option";
            }

            leaf option-reference {
              type string;
              description
                "reference to the
              specification";
            }

            leaf option-value {
              type string;
              mandatory true;
              description
                "the new option's value";
            }
          }  // list new-or-standard-option

          leaf user-class-value {
            type string;
            description
              "use class option's value";
          }

          leaf enterprise-number {
            type uint32;
            description "enterprise number";
          }

          leaf store-client-link-layer {
            type boolean;
            description
              "whether to store client's
            link layer address";
          }

          container preference-option {
            description "preference option";
            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this option will be included in the
              option set";
            }

            leaf preference-value {
              type uint8;
              mandatory true;
              description
                "the value for this option";
            }
          }  // container preference-option

          container sip-server-option {
            description "sip server option";
            reference
              "RFC3319: Dynamic Host Configuration Protocol
              (DHCPv6) Options for Session Initiation Protocol (SIP)
              Servers";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
              option will be included in the
              option set";
            }

            list sip-server {
              key "sip-serv-id";
              description "sip server info";
              leaf sip-serv-id {
                type uint8;
                mandatory true;
                description "sip server id";
              }

              leaf sip-serv-domain-name {
                type string;
                mandatory true;
                description
                  "sip server domain
                name";
              }

              leaf sip-serv-addr {
                type inet:ipv6-address;
                mandatory true;
                description
                  "sip server addr";
              }
            }  // list sip-server
          }  // container sip-server-option

          container dns-config-option {
            description
              "OPTION_DNS_SERVERS (23) DNS recursive Name
            Server option";
            reference
              "RFC3646: DNS Configuration options for Dynamic
              Host Configuration Protocol for IPv6 (DHCPv6)";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
              option will be included in the
              option set";
            }

            list dns-server {
              key "dns-serv-id";
              description "dns server info";
              leaf dns-serv-id {
                type uint8;
                mandatory true;
                description
                  "DNS server list entry ID.";
              }

              leaf dns-serv-addr {
                type inet:ipv6-address;
                mandatory true;
                description
                  "DNS server address.";
              }
            }  // list dns-server
          }  // container dns-config-option

          container domain-searchlist-option {
            description
              "OPTION_DOMAIN_LIST (24) Domain Search List Option";
            reference
              "RFC3646: DNS Configuration options for Dynamic
              Host Configuration Protocol for IPv6 (DHCPv6)";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
              option will be included in the
              option set";
            }

            list domain-searchlist {
              key "domain-searchlist-id";
              description "dns server info";
              leaf domain-searchlist-id {
                type uint8;
                mandatory true;
                description
                  "Domain seachlist entry ID.";
              }

              leaf domain-search-list-entry {
                type string;
                mandatory true;
                description
                  "Domain search list entry.";
              }
            }  // list domain-searchlist
          }  // container domain-searchlist-option

          container nis-config-option {
            description
              "OPTION_NIS_SERVERS (27) Network Information Service (NIS)
            Servers Option.";
            reference
              "RFC3989: Network Information Service (NIS) Configuration
              Options for Dynamic Host Configuration Protocol for IPv6 (DHCPv6)";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
              option will be included in the
              option set";
            }

            list nis-server {
              key "nis-serv-id";
              description "nis server info";
              leaf nis-serv-id {
                type uint8;
                mandatory true;
                description "nis server id";
              }

              leaf nis-serv-addr {
                type inet:ipv6-address;
                mandatory true;
                description
                  "nis server addr";
              }
            }  // list nis-server
          }  // container nis-config-option

          container nis-plus-config-option {
            description
              "OPTION_NISP_SERVERS (28): Network Information Service V2
            (NIS+) Servers Option.";
            reference
              "RFC3989: Network Information Service (NIS) Configuration
              Options for Dynamic Host Configuration Protocol for IPv6 (DHCPv6)";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
              option will be included in the
              option set";
            }

            list nis-plus-server {
              key "nis-plus-serv-id";
              description
                "NIS+ server information.";
              leaf nis-plus-serv-id {
                type uint8;
                mandatory true;
                description "nisp server id";
              }

              leaf nis-plus-serv-addr {
                type inet:ipv6-address;
                mandatory true;
                description
                  "nisp server addr";
              }
            }  // list nis-plus-server
          }  // container nis-plus-config-option

          container sntp-server-option {
            description
              "OPTION_SNTP_SERVERS (31) Simple Network Time Protocol
            (SNTP) Servers Option";
            reference
              "RFC4075: Simple Network Time Protocol (SNTP) Configuration
              Option for DHCPv6";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
              option will be included in the
              option set";
            }

            list sntp-server {
              key "sntp-serv-id";
              description "sntp server info";
              leaf sntp-serv-id {
                type uint8;
                mandatory true;
                description "sntp server id";
              }

              leaf sntp-serv-addr {
                type inet:ipv6-address;
                mandatory true;
                description
                  "sntp server addr";
              }
            }  // list sntp-server
          }  // container sntp-server-option

          container info-refresh-time-option {
            description
              "OPTION_INFORMATION_REFRESH_TIME (32) Information Refresh
            Time option.";
            reference
              "RFC4242: Information Refresh Time Option for Dynamic Host
              Configuration Protocol for IPv6 (DHCPv6";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
             option will be included in the
             option set";
            }

            leaf info-refresh-time {
              type yang:timeticks;
              mandatory true;
              description
                "The refresh time.";
            }
          }  // container info-refresh-time-option

          container cli-fqdn-option {
            description
              "OPTION_CLIENT_FQDN (39) DHCPv6 Client FQDN Option";
            reference
              "RFC4704: The Dynamic Host Configuration Protocol for IPv6
              (DHCPv6) Client Fully Qualified Domain Name (FQDN) Option";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this option will be included in the
              option set";
            }

            leaf server-initiate-update {
              type boolean;
              mandatory true;
              description "server initiate";
            }

            leaf client-initiate-update {
              type boolean;
              mandatory true;
              description "client initiate";
            }

            leaf modify-name-from-cli {
              type boolean;
              mandatory true;
              description "modify by client";
            }
          }  // container cli-fqdn-option

          container posix-timezone-option {
            description
              "OPTION_NEW_POSIX_TIMEZONE (41) Posix Timezone option";
            reference
              "RFC4822: Timezone Options for DHCP";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this option will be included in the
                      option set";
            }

            leaf tz-posix {
              type string;
              mandatory true;
              description
                "TZ Posix IEEE 1003.1 String";
            }
          }  // container posix-timezone-option

          container posix-timezone-db-option {
            description
              "OPTION_NEW_TZDB_TIMEZONE (42) Timezone Database option";
            reference
              "RFC4822: Timezone Options for DHCP";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this option will be included in the
                      option set";
            }

            leaf tz-database {
              type string;
              mandatory true;
              description
                "Reference to the TZ Database";
            }
          }  // container posix-timezone-db-option

          container ntp-server-option {
            description
              "OPTION_NTP_SERVER (56) NTP Server Option for DHCPv6";
            reference
              "RFC5908: Network Time Protocol (NTP) Server Option for
              DHCPv6";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this option will be included in the
                      option set";
            }

            list ntp-server {
              key "ntp-serv-id";
              description "ntp server info";
              leaf ntp-serv-id {
                type uint8;
                mandatory true;
                description "ntp server id";
              }

              leaf ntp-serv-addr-suboption {
                type inet:ipv6-address;
                mandatory true;
                description
                  "ntp server addr";
              }

              leaf ntp-serv-mul-addr-suboption {
                type inet:ipv6-address;
                mandatory true;
                description
                  "ntp server multicast addr";
              }

              leaf ntp-serv-fqdn-suboption {
                type string;
                mandatory true;
                description
                  "ntp server fqdn";
              }
            }  // list ntp-server
          }  // container ntp-server-option

          container network-boot-option {
            description
              "network boot option";
            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
              option will be included in the
              option set";
            }

            list boot-file {
              key "boot-file-id";
              description "boot file info";
              leaf boot-file-id {
                type uint8;
                mandatory true;
                description "boot file id";
              }

              leaf-list suitable-arch-type {
                type uint16;
                description
                  "architecture type";
              }

              leaf-list suitable-net-if {
                type uint32;
                description
                  "network interface";
              }

              leaf boot-file-url {
                type string;
                mandatory true;
                description
                  "url for boot file";
              }

              list boot-file-paras {
                key "para-id";
                description
                  "boot file parameters";
                leaf para-id {
                  type uint8;
                  mandatory true;
                  description "parameter id";
                }

                leaf parameter {
                  type string;
                  mandatory true;
                  description
                    "parameter
                  value";
                }
              }  // list boot-file-paras
            }  // list boot-file
          }  // container network-boot-option

          container aftr-name-option {
            description
              "OPTION_AFTR_NAME (64) AFTR-Name DHCPv6 Option";
            reference
              "RFC6334: Dynamic Host Configuration Protocol for IPv6
              (DHCPv6) Option for Dual-Stack Lite";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this option will be included in the
            option set";
            }

            leaf tunnel-endpoint-name {
              type string;
              mandatory true;
              description "aftr name";
            }
          }  // container aftr-name-option

          container kerberos-option {
            description "kerberos option";
            reference
              "RFC6784: Kerberos Options for DHCPv6";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
              option will be included in the
              option set";
            }

            leaf default-realm-name {
              type string;
              mandatory true;
              description
                "default realm name";
            }

            list kdc-info {
              key "kdc-id";
              description "kdc info";
              leaf kdc-id {
                type uint8;
                mandatory true;
                description "kdc id";
              }

              leaf priority {
                type uint16;
                mandatory true;
                description "priority";
              }

              leaf weight {
                type uint16;
                mandatory true;
                description "weight";
              }

              leaf transport-type {
                type uint8;
                mandatory true;
                description "transport type";
              }

              leaf port-number {
                type uint16;
                mandatory true;
                description "port number";
              }

              leaf kdc-ipv6-addr {
                type inet:ipv6-address;
                mandatory true;
                description "kdc ipv6 addr";
              }

              leaf realm-name {
                type string;
                mandatory true;
                description "realm name";
              }
            }  // list kdc-info
          }  // container kerberos-option

          container addr-selection-option {
            description
              "address selection option";
            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this option will be included in the
                      option set";
            }

            leaf a-bit-set {
              type boolean;
              mandatory true;
              description "a bit";
            }

            leaf p-bit-set {
              type boolean;
              mandatory true;
              description "p bit";
            }

            list policy-table {
              key "policy-id";
              description "policy table";
              leaf policy-id {
                type uint8;
                mandatory true;
                description "policy id";
              }

              leaf label {
                type uint8;
                mandatory true;
                description "label";
              }

              leaf precedence {
                type uint8;
                mandatory true;
                description "precedence";
              }

              leaf prefix-len {
                type uint8;
                mandatory true;
                description "prefix length";
              }

              leaf prefix {
                type inet:ipv6-prefix;
                mandatory true;
                description "prefix";
              }
            }  // list policy-table
          }  // container addr-selection-option

          container sol-max-rt-option {
            description
              "OPTION_SOL_MAX_RT (82) sol max rt option";
            reference
              "RFC7083: Modification to Default Values of
              SOL_MAX_RT and INF_MAX_RT";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
                      option will be included in the
                      option set";
            }

            leaf sol-max-rt-value {
              type yang:timeticks;
              mandatory true;
              description "sol max rt value";
            }
          }  // container sol-max-rt-option

          container inf-max-rt-option {
            description
              "OPTION_INF_MAX_RT (83) inf max rt option";
            reference
              "RFC7083: Modification to Default Values of
              SOL_MAX_RT and INF_MAX_RT";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
                      option will be included in the
                      option set";
            }

            leaf inf-max-rt-value {
              type yang:timeticks;
              mandatory true;
              description "inf max rt value";
            }
          }  // container inf-max-rt-option

          container pcp-server-option {
            description
              "OPTION_V6_PCP_SERVER (86)
                    pcp server option";
            reference
              "RFC7291: DHCP Options for the Port Control
              Protocol (PCP)";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
                      option will be included in the
                      option set";
            }

            list pcp-server {
              key "pcp-serv-id";
              description "pcp server info";
              leaf pcp-serv-id {
                type uint8;
                mandatory true;
                description "pcp server id";
              }

              leaf pcp-serv-addr {
                type inet:ipv6-address;
                mandatory true;
                description
                  "pcp server addr";
              }
            }  // list pcp-server
          }  // container pcp-server-option

          container s46-rule-option {
            description "s46 rule option";
            reference
              "RFC7598: DHCPv6 Options for Configuration of
              Softwire Address and Port-Mapped Clients";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
                      option will be included in the
                      option set";
            }

            list s46-rule {
              key "rule-id";
              description "s46 rule";
              leaf rule-id {
                type uint8;
                mandatory true;
                description "rule id";
              }

              leaf rule-type {
                type enumeration {
                  enum "BMR" {
                    value 0;
                    description "BMR";
                  }
                  enum "FMR" {
                    value 1;
                    description "FMR";
                  }
                }
                mandatory true;
                description "rule type";
              }

              leaf prefix4-len {
                type uint8;
                mandatory true;
                description
                  "ipv4 prefix length";
              }

              leaf ipv4-prefix {
                type inet:ipv4-prefix;
                mandatory true;
                description "ipv4 prefix";
              }

              leaf prefix6-len {
                type uint8;
                mandatory true;
                description
                  "ipv6 prefix length";
              }

              leaf ipv6-prefix {
                type inet:ipv6-prefix;
                mandatory true;
                description "ipv6 prefix";
              }

              uses portset-para;
            }  // list s46-rule
          }  // container s46-rule-option

          container s46-br-option {
            description "s46 br option";
            reference
              "RFC7598: DHCPv6 Options for Configuration of
              Softwire Address and Port-Mapped Clients";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
                      option will be included in the
                      option set";
            }

            list br {
              key "br-id";
              description "br info";
              leaf br-id {
                type uint8;
                mandatory true;
                description "br id";
              }

              leaf br-ipv6-addr {
                type inet:ipv6-address;
                mandatory true;
                description "br ipv6 addr";
              }
            }  // list br
          }  // container s46-br-option

          container operator-option-ipv6-address {
            description
              "operator ipv6 address option";
            reference
              "RFC7227: Guidelines for Creating New DHCPv6 Options";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
              option will be included in the
              option set";
            }

            list operator-ipv6-addr {
              key "operator-ipv6-addr-id";
              description
                "operator ipv6 address info";
              leaf operator-ipv6-addr-id {
                type uint8;
                mandatory true;
                description
                  "operator ipv6 address id";
              }

              leaf operator-ipv6-addr {
                type inet:ipv6-address;
                mandatory true;
                description
                  "operator ipv6 address id";
              }
            }  // list operator-ipv6-addr
          }  // container operator-option-ipv6-address

          container operator-option-single-flag {
            description
              "operator single flag";
            reference
              "RFC7227: Guidelines for Creating New DHCPv6
              Options";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
              option will be included in the
              option set";
            }

            list flag {
              key "flag-id";
              description
                "operator single flag info";
              leaf flag-id {
                type uint8;
                mandatory true;
                description
                  "operator single flag id";
              }

              leaf flag-value {
                type boolean;
                mandatory true;
                description
                  "operator single flag value";
              }
            }  // list flag
          }  // container operator-option-single-flag

          container operator-option-ipv6-prefix {
            description
              "operator ipv6 prefix option";
            reference
              "RFC7227: Guidelines for Creating New DHCPv6
              Options";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
              option will be included in the
              option set";
            }

            list operator-ipv6-prefix {
              key "operator-ipv6-prefix-id";
              description
                "operator ipv6 prefix info";
              leaf operator-ipv6-prefix-id {
                type uint8;
                mandatory true;
                description
                  "operator ipv6 prefix id";
              }

              leaf operator-ipv6-prefix6-len {
                type uint8;
                mandatory true;
                description
                  "operator ipv6 prefix length";
              }

              leaf operator-ipv6-prefix {
                type inet:ipv6-prefix;
                mandatory true;
                description
                  "operator ipv6 prefix";
              }
            }  // list operator-ipv6-prefix
          }  // container operator-option-ipv6-prefix

          container operator-option-int32 {
            description
              "operator integer 32 option";
            reference
              "RFC7227: Guidelines for Creating New DHCPv6
              Options";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
              option will be included in the
              option set";
            }

            list int32val {
              key "int32val-id";
              description
                "operator integer 32 info";
              leaf int32val-id {
                type uint8;
                mandatory true;
                description
                  "operator integer 32 id";
              }

              leaf int32val {
                type uint32;
                mandatory true;
                description
                  "operator integer 32 value";
              }
            }  // list int32val
          }  // container operator-option-int32

          container operator-option-int16 {
            description
              "operator integer 16 option";
            reference
              "RFC7227: Guidelines for Creating New DHCPv6
              Options";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
              option will be included in the
              option set";
            }

            list int16val {
              key "int16val-id";
              description
                "operator integer 16 info";
              leaf int16val-id {
                type uint8;
                mandatory true;
                description
                  "operator integer 16 id";
              }

              leaf int16val {
                type uint16;
                mandatory true;
                description
                  "operator integer 16 value";
              }
            }  // list int16val
          }  // container operator-option-int16

          container operator-option-int8 {
            description
              "operator integer 8 option";
            reference
              "RFC7227: Guidelines for Creating New DHCPv6
              Options";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
              option will be included in the
              option set";
            }

            list int8val {
              key "int8val-id";
              description
                "operator integer 8 info";
              leaf int8val-id {
                type uint8;
                mandatory true;
                description
                  "operator integer 8 id";
              }

              leaf int8val {
                type uint8;
                mandatory true;
                description
                  "operator integer 8 value";
              }
            }  // list int8val
          }  // container operator-option-int8

          container operator-option-uri {
            description
              "operator uri option";
            reference
              "RFC7227: Guidelines for Creating New DHCPv6
              Options";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
              option will be included in the
              option set";
            }

            list uri {
              key "uri-id";
              description
                "operator uri info";
              leaf uri-id {
                type uint8;
                mandatory true;
                description
                  "operator uri id";
              }

              leaf uri {
                type string;
                mandatory true;
                description
                  "operator uri value";
              }
            }  // list uri
          }  // container operator-option-uri

          container operator-option-textstring {
            description
              "operator itext string option";
            reference
              "RFC7227: Guidelines for Creating New DHCPv6 Options";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
              option will be included in the
              option set";
            }

            list textstring {
              key "textstring-id";
              description
                "operator text string info";
              leaf textstring-id {
                type uint8;
                mandatory true;
                description
                  "operator text string id";
              }

              leaf textstring {
                type string;
                mandatory true;
                description
                  "operator text string value";
              }
            }  // list textstring
          }  // container operator-option-textstring

          container operator-option-var-data {
            description
              "operator variable length data option";
            reference
              "RFC7227: Guidelines for Creating New DHCPv6 Options";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
              option will be included in the
              option set";
            }

            list int32val {
              key "var-data-id";
              description
                "operator ivariable length data info";
              leaf var-data-id {
                type uint8;
                mandatory true;
                description
                  "operator variable length id";
              }

              leaf var-data {
                type binary;
                mandatory true;
                description
                  "operator variable length value";
              }
            }  // list int32val
          }  // container operator-option-var-data

          container operator-option-dns-wire {
            description
              "operator dns wire format domain name list option";
            reference
              "RFC7227: Guidelines for Creating New DHCPv6
              Options";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
              option will be included in the
              option set";
            }

            list operator-option-dns-wire {
              key "operator-option-dns-wire-id";
              description
                "operator dns wire format info";
              leaf operator-option-dns-wire-id {
                type uint8;
                mandatory true;
                description
                  "operator dns wire format id";
              }

              leaf operator-option-dns-wire {
                type binary;
                mandatory true;
                description
                  "operator dns wire format value";
              }
            }  // list operator-option-dns-wire
          }  // container operator-option-dns-wire

          container s46-dmr-option {
            description "s46 dmr option";
            reference
              "RFC7598: DHCPv6 Options for Configuration of
              Softwire Address and Port-Mapped Clients";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
              option will be included in the
              option set";
            }

            list dmr {
              key "dmr-id";
              description "dmr info";
              leaf dmr-id {
                type uint8;
                mandatory true;
                description "dmr id";
              }

              leaf dmr-prefix-len {
                type uint8;
                mandatory true;
                description
                  "dmr prefix length";
              }

              leaf dmr-ipv6-prefix {
                type inet:ipv6-prefix;
                mandatory true;
                description
                  "dmr ipv6 prefix";
              }
            }  // list dmr
          }  // container s46-dmr-option

          container s46-v4-v6-binding-option {
            description "s46 binding option";
            reference
              "RFC7598: DHCPv6 Options for Configuration of
              Softwire Address and Port-Mapped Clients";

            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
              option will be included in the
              option set";
            }

            list ce {
              key "ce-id";
              description "ce info";
              leaf ce-id {
                type uint8;
                mandatory true;
                description "ce id";
              }

              leaf ipv4-addr {
                type inet:ipv4-address;
                mandatory true;
                description "ce ipv4 addr";
              }

              leaf bind-prefix6-len {
                type uint8;
                mandatory true;
                description
                  "bind ipv6 prefix
                length";
              }

              leaf bind-ipv6-prefix {
                type inet:ipv6-prefix;
                mandatory true;
                description
                  "bind ipv6 prefix";
              }

              uses portset-para;
            }  // list ce
          }  // container s46-v4-v6-binding-option
        }  // list option-set
      }  // container option-sets

      container network-ranges {
        description
          "This model supports a hierarchy
        to achieve dynamic configuration. That is to
        say we could configure the server at different
        levels through this model. The top level is a
        global level which is defined as the container
        'network-ranges'. The following levels are
        defined as sub-containers under it. The
        'network-ranges' contains the parameters
        (e.g. option-sets) that would be allocated to
        all the clients served by this server.";
        leaf option-set-id {
          type uint8;
          description
            "a specific option set";
        }

        list network-range {
          key "network-range-id";
          description
            "Under the 'network-ranges'
          container, a 'network-range' list is
          defined to configure the server at a
          network level which is also considered
          as the second level. Different network
          are identified by the key 'network-range-id'.
          This is because a server may have different
          configuration parameters (e.g. option sets)
          for different networks.";
          leaf network-range-id {
            type uint8;
            mandatory true;
            description
              "equivalent to subnet id";
          }

          leaf network-description {
            type string;
            mandatory true;
            description
              "description of the subnet";
          }

          leaf network-prefix {
            type inet:ipv6-prefix;
            mandatory true;
            description "subnet prefix";
          }

          leaf inherit-option-set {
            type boolean;
            mandatory true;
            description
              "indicate whether to inherit
            the configuration from higher level";
          }

          leaf option-set-id {
            type uint8;
            mandatory true;
            description
              "the selected option-set";
          }

          container reserved-addresses {
            description "reserved addresses";
            list static-binding {
              key "cli-id";
              description
                "static binding of
              reserved addresses";
              leaf cli-id {
                type uint32;
                mandatory true;
                description "client id";
              }

              container duid {
                description "Sets the DUID";
                uses duid;
              }  // container duid

              leaf-list reserv-addr {
                type inet:ipv6-address;
                description "reserved addr";
              }
            }  // list static-binding

            leaf-list other-reserv-addr {
              type inet:ipv6-address;
              description
                "other reserved
              addr";
            }
          }  // container reserved-addresses

          container reserved-prefixes {
            description "reserved prefixes";
            list static-binding {
              key "cli-id";
              description "static binding";
              leaf cli-id {
                type uint32;
                mandatory true;
                description "client id";
              }

              container duid {
                description "Sets the DUID";
                uses duid;
              }  // container duid

              leaf reserv-prefix-len {
                type uint8;
                mandatory true;
                description
                  "reserved
                prefix length";
              }

              leaf reserv-prefix {
                type inet:ipv6-prefix;
                mandatory true;
                description
                  "reserved prefix";
              }
            }  // list static-binding

            leaf exclude-prefix-len {
              type uint8;
              mandatory true;
              description
                "exclude prefix
              length";
            }

            leaf exclude-prefix {
              type inet:ipv6-prefix;
              mandatory true;
              description "exclude prefix";
            }

            list other-reserv-prefix {
              key "reserv-id";
              description
                "other reserved prefix";
              leaf reserv-id {
                type uint8;
                mandatory true;
                description
                  "reserved prefix id";
              }

              leaf prefix-len {
                type uint8;
                mandatory true;
                description "prefix length";
              }

              leaf prefix {
                type inet:ipv6-prefix;
                mandatory true;
                description
                  "reserved prefix";
              }
            }  // list other-reserv-prefix
          }  // container reserved-prefixes

          container address-pools {
            description
              "A container describes
            the DHCPv6 server's address pools.";
            list address-pool {
              key "pool-id";
              description
                "A DHCPv6 server can
              be configured with several address
              pools. This list defines such
              address pools which are distinguish
              by the key called 'pool-name'.";
              leaf pool-id {
                type uint8;
                mandatory true;
                description "pool id";
              }

              leaf pool-prefix {
                type inet:ipv6-prefix;
                mandatory true;
                description "pool prefix";
              }

              leaf start-address {
                type inet:ipv6-address-no-zone;
                mandatory true;
                description "start address";
              }

              leaf end-address {
                type inet:ipv6-address-no-zone;
                mandatory true;
                description "end address";
              }

              leaf renew-time {
                type yang:timeticks;
                mandatory true;
                description "renew time";
              }

              leaf rebind-time {
                type yang:timeticks;
                mandatory true;
                description "rebind time";
              }

              leaf preferred-lifetime {
                type yang:timeticks;
                mandatory true;
                description
                  "preferred lifetime
                for IA";
              }

              leaf valid-lifetime {
                type yang:timeticks;
                mandatory true;
                description
                  "valid liftime for IA";
              }

              leaf total-ipv6-count {
                type uint64;
                config false;
                mandatory true;
                description
                  "how many ipv6
                addressses are in the pool";
              }

              leaf used-ipv6-count {
                type uint64;
                config false;
                mandatory true;
                description
                  "how many are
                allocated";
              }

              leaf utilization-ratio {
                type threshold;
                mandatory true;
                description
                  "the utilization ratio";
              }

              leaf inherit-option-set {
                type boolean;
                mandatory true;
                description
                  "indicate whether to
                inherit the configuration from
                higher level";
              }

              leaf option-set-id {
                type uint8;
                mandatory true;
                description
                  "the selected option-set";
              }
            }  // list address-pool

            list binding-info {
              key "cli-id";
              config false;
              description
                "A list records a binding
              information for each DHCPv6 client
              that has already been allocated IPv6
              addresses.";
              leaf cli-id {
                type uint32;
                mandatory true;
                description "client id";
              }

              container duid {
                description "Sets the DUID";
                uses duid;
              }  // container duid

              list cli-ia {
                key "iaid";
                description "client IA";
                leaf ia-type {
                  type string;
                  mandatory true;
                  description "IA type";
                }

                leaf iaid {
                  type uint32;
                  mandatory true;
                  description "IAID";
                }

                leaf-list cli-addr {
                  type inet:ipv6-address;
                  description "client addr";
                }

                leaf pool-id {
                  type uint8;
                  mandatory true;
                  description "pool id";
                }
              }  // list cli-ia
            }  // list binding-info
          }  // container address-pools

          container prefix-pools {
            description
              "If a server supports prefix
            delegation function, this container will
            be used to define the delegating router's
            refix pools.";
            list prefix-pool {
              key "pool-id";
              description
                "Similar to server's
              address pools, a delegating router
              can also be configured with multiple
              prefix pools specified by a list
              called 'prefix-pool'.";
              leaf pool-id {
                type uint8;
                mandatory true;
                description "pool id";
              }

              leaf prefix {
                type inet:ipv6-prefix;
                mandatory true;
                description "ipv6 prefix";
              }

              leaf prefix-length {
                type uint8;
                mandatory true;
                description "prefix length";
              }

              leaf renew-time {
                type yang:timeticks;
                mandatory true;
                description "renew time";
              }

              leaf rebind-time {
                type yang:timeticks;
                mandatory true;
                description "rebind time";
              }

              leaf preferred-lifetime {
                type yang:timeticks;
                mandatory true;
                description
                  "preferred lifetime for
                IA";
              }

              leaf valid-lifetime {
                type yang:timeticks;
                mandatory true;
                description
                  "valid lifetime for IA";
              }

              leaf utilization-ratio {
                type threshold;
                mandatory true;
                description
                  "utilization ratio";
              }

              leaf inherit-option-set {
                type boolean;
                mandatory true;
                description
                  "whether to inherit
                configuration from higher level";
              }

              leaf option-set-id {
                type uint8;
                mandatory true;
                description
                  "the selected option-set";
              }
            }  // list prefix-pool

            list binding-info {
              key "cli-id";
              config false;
              description
                "A list records a
              binding information for each
              DHCPv6 client that has already
              been allocated IPv6 addresses.";
              leaf cli-id {
                type uint32;
                mandatory true;
                description "client id";
              }

              container duid {
                description "Sets the DUID";
                uses duid;
              }  // container duid

              list cli-iapd {
                key "iaid";
                description "client IAPD";
                leaf iaid {
                  type uint32;
                  mandatory true;
                  description "IAID";
                }

                leaf-list cli-prefix {
                  type inet:ipv6-prefix;
                  description
                    "client ipv6 prefix";
                }

                leaf-list cli-prefix-len {
                  type uint8;
                  description
                    "client prefix length";
                }

                leaf pool-id {
                  type uint8;
                  mandatory true;
                  description "pool id";
                }
              }  // list cli-iapd
            }  // list binding-info
          }  // container prefix-pools

          container hosts {
            description "hosts level";
            list host {
              key "cli-id";
              description "specific host";
              leaf cli-id {
                type uint32;
                mandatory true;
                description "client id";
              }

              container duid {
                description "Sets the DUID";
                uses duid;
              }  // container duid

              leaf inherit-option-set {
                type boolean;
                mandatory true;
                description
                  "whether to inherit
                configuration
                from higher level";
              }

              leaf option-set-id {
                type uint8;
                mandatory true;
                description
                  "the selected option-set";
              }

              leaf nis-domain-name {
                type string;
                description
                  "nis domain name";
              }

              leaf nis-plus-domain-name {
                type string;
                description
                  "nisp domain name";
              }
            }  // list host
          }  // container hosts
        }  // list network-range
      }  // container network-ranges

      container relay-opaque-paras {
        description
          "This container contains some
        opaque values in Relay Agent options that
        need to be configured on the server side
        only for value match. Such Relay Agent
        options include Interface-Id option,
                Remote-Id option and Subscriber-Id option.";
        list relays {
          key "relay-name";
          description "relay agents";
          leaf relay-name {
            type string;
            mandatory true;
            description "relay agent name";
          }

          list interface-info {
            key "if-name";
            description "interface info";
            leaf if-name {
              type string;
              mandatory true;
              description "interface name";
            }

            leaf interface-id {
              type string;
              mandatory true;
              description "interface id";
            }
          }  // list interface-info

          list subscribers {
            key "subscriber";
            description "subscribers";
            leaf subscriber {
              type uint8;
              mandatory true;
              description "subscriber";
            }

            leaf subscriber-id {
              type string;
              mandatory true;
              description "subscriber id";
            }
          }  // list subscribers

          list remote-host {
            key "ent-num";
            description "remote host";
            leaf ent-num {
              type uint32;
              mandatory true;
              description
                "enterprise number";
            }

            leaf remote-id {
              type string;
              mandatory true;
              description "remote id";
            }
          }  // list remote-host
        }  // list relays
      }  // container relay-opaque-paras

      container rsoo-enabled-options {
        description "rsoo enabled options";
        list rsoo-enabled-option {
          key "option-code";
          description "rsoo enabled option";
          leaf option-code {
            type uint16;
            mandatory true;
            description "option code";
          }

          leaf description {
            type string;
            mandatory true;
            description
              "description of the option";
          }
        }  // list rsoo-enabled-option
      }  // container rsoo-enabled-options

      container packet-stats {
        config false;
        description
          "A container presents
        the packet statistics related to
        the DHCPv6 server.";
        leaf solicit-count {
          type uint32;
          mandatory true;
          description "solicit counter";
        }

        leaf request-count {
          type uint32;
          mandatory true;
          description "request counter";
        }

        leaf renew-count {
          type uint32;
          mandatory true;
          description "renew counter";
        }

        leaf rebind-count {
          type uint32;
          mandatory true;
          description "rebind counter";
        }

        leaf decline-count {
          type uint32;
          mandatory true;
          description "decline count";
        }

        leaf release-count {
          type uint32;
          mandatory true;
          description "release counter";
        }

        leaf info-req-count {
          type uint32;
          mandatory true;
          description
            "information request
          counter";
        }

        leaf advertise-count {
          type uint32;
          mandatory true;
          description "advertise counter";
        }

        leaf confirm-count {
          type uint32;
          mandatory true;
          description "confirm counter";
        }

        leaf reply-count {
          type uint32;
          mandatory true;
          description "reply counter";
        }

        leaf reconfigure-count {
          type uint32;
          mandatory true;
          description "reconfigure counter";
        }

        leaf relay-forward-count {
          type uint32;
          mandatory true;
          description
            "relay forward counter";
        }

        leaf relay-reply-count {
          type uint32;
          mandatory true;
          description "relay reply counter";
        }
      }  // container packet-stats
    }  // container server

    container relay {
      presence "Enables relay";
      description "dhcpv6 relay portion";
      container relay-attributes {
        description
          "A container describes
        some basic attributes of the relay
        agent including some relay agent
        specific options data that need to
        be configured previously. Such options
        include Remote-Id option and
        Subscriber-Id option.";
        leaf name {
          type string;
          description "relay agent name";
        }

        leaf description {
          type string;
          description
            "description of the relay agent";
        }

        leaf-list dest-addrs {
          type inet:ipv6-address;
          description
            "Each DHCPv6 relay agent may
          be configured with a list of destination
          addresses. This node defines such a list
          of IPv6 addresses that may include
          unicast addresses, multicast addresses
          or other addresses.";
        }

        list subscribers {
          key "subscriber";
          description "subscribers";
          leaf subscriber {
            type uint8;
            mandatory true;
            description "subscriber";
          }

          leaf subscriber-id {
            type string;
            mandatory true;
            description "subscriber id";
          }
        }  // list subscribers

        list remote-host {
          key "ent-num";
          description "remote host";
          leaf ent-num {
            type uint32;
            mandatory true;
            description "enterprise number";
          }

          leaf remote-id {
            type string;
            mandatory true;
            description "remote id";
          }
        }  // list remote-host

        uses vendor-infor;
      }  // container relay-attributes

      container relay-supplied-options-option {
        description
          "relay supplied options option";
        list rsoo-set {
          key "rsoo-set-id";
          description "rsoo set";
          leaf rsoo-set-id {
            type uint8;
            mandatory true;
            description "rsoo set id";
          }

          container erp-local-domain-name-option {
            description
              "erp local domain name option";
            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether
              this option is included in the
              rsoo set";
            }

            list erp-for-client {
              key "cli-id";
              description "erp for client";
              leaf cli-id {
                type uint32;
                mandatory true;
                description "client id";
              }

              container duid {
                description "Sets the DUID";
                uses duid;
              }  // container duid

              leaf erp-name {
                type string;
                mandatory true;
                description "erp name";
              }
            }  // list erp-for-client
          }  // container erp-local-domain-name-option
        }  // list rsoo-set
      }  // container relay-supplied-options-option

      list relay-if {
        key "if-name";
        description
          "A relay agent may have several
        interfaces, we should provide a way to configure
        and manage parameters on the interface-level. A
        list that describes specific interfaces and
        their corresponding parameters is employed to
        fulfil the configfuration. Here we use a string
        called 'if-name; as the key of list.";
        leaf if-name {
          type string;
          mandatory true;
          description "interface name";
        }

        leaf enable {
          type boolean;
          mandatory true;
          description
            "whether this interface is enabled";
        }

        leaf ipv6-address {
          type inet:ipv6-address;
          description
            "ipv6 address for this interface";
        }

        leaf interface-id {
          type string;
          description "interface id";
        }

        leaf-list rsoo-set {
          type uint8;
          description "configured rsoo set";
        }

        list pd-route {
          key "pd-route-id";
          description "pd route";
          leaf pd-route-id {
            type uint8;
            mandatory true;
            description "pd route id";
          }

          leaf requesting-router-id {
            type uint32;
            mandatory true;
            description
              "requesting router id";
          }

          leaf delegating-router-id {
            type uint32;
            mandatory true;
            description
              "delegating router id";
          }

          leaf next-router {
            type inet:ipv6-address;
            mandatory true;
            description "next router";
          }

          leaf last-router {
            type inet:ipv6-address;
            mandatory true;
            description "previous router";
          }
        }  // list pd-route

        list next-entity {
          key "dest-addr";
          description
            "This node defines
          a list that is used to describe
          the next hop entity of this
          relay distinguished by their
          addresses.";
          leaf dest-addr {
            type inet:ipv6-address;
            mandatory true;
            description "destination addr";
          }

          leaf available {
            type boolean;
            mandatory true;
            description
              "whether the next entity
            is available or not";
          }

          leaf multicast {
            type boolean;
            mandatory true;
            description
              "whether the address is
            multicast or not";
          }

          leaf server {
            type boolean;
            mandatory true;
            description
              "whether the next entity
            is a server";
          }

          container packet-stats {
            config false;
            description "packet statistics";
            leaf cli-packet-rvd-count {
              type uint32;
              mandatory true;
              description
                "client received packet
              counter";
            }

            leaf solicit-rvd-count {
              type uint32;
              mandatory true;
              description
                "solicit received counter";
            }

            leaf request-rvd-count {
              type uint32;
              mandatory true;
              description
                "request received counter";
            }

            leaf renew-rvd-count {
              type uint32;
              mandatory true;
              description
                "renew received counter";
            }

            leaf rebind-rvd-count {
              type uint32;
              mandatory true;
              description
                "rebind recevied counter";
            }

            leaf decline-rvd-count {
              type uint32;
              mandatory true;
              description
                "decline received counter";
            }

            leaf release-rvd-count {
              type uint32;
              mandatory true;
              description
                "release received counter";
            }

            leaf info-req-rvd-count {
              type uint32;
              mandatory true;
              description
                "information request counter";
            }

            leaf relay-for-rvd-count {
              type uint32;
              mandatory true;
              description
                "relay forward received counter";
            }

            leaf relay-rep-rvd-count {
              type uint32;
              mandatory true;
              description
                "relay reply received counter";
            }

            leaf packet-to-cli-count {
              type uint32;
              mandatory true;
              description
                "packet to client counter";
            }

            leaf adver-sent-count {
              type uint32;
              mandatory true;
              description
                "advertisement sent counter";
            }

            leaf confirm-sent-count {
              type uint32;
              mandatory true;
              description
                "confirm sent counter";
            }

            leaf reply-sent-count {
              type uint32;
              mandatory true;
              description
                "reply sent counter";
            }

            leaf reconfig-sent-count {
              type uint32;
              mandatory true;
              description
                "reconfigure sent counter";
            }

            leaf relay-for-sent-count {
              type uint32;
              mandatory true;
              description
                "relay forward sent counter";
            }

            leaf relay-rep-sent-count {
              type uint32;
              mandatory true;
              description
                "relay reply sent counter";
            }
          }  // container packet-stats
        }  // list next-entity
      }  // list relay-if

      container relay-stats {
        config false;
        description "relay statistics";
        leaf cli-packet-rvd-count {
          type uint32;
          mandatory true;
          description
            "client packet received counter";
        }

        leaf relay-for-rvd-count {
          type uint32;
          mandatory true;
          description
            "relay forward received counter";
        }

        leaf relay-rep-rvd-count {
          type uint32;
          mandatory true;
          description
            "relay reply recevied counter";
        }

        leaf packet-to-cli-count {
          type uint32;
          mandatory true;
          description
            "packet to client counter";
        }

        leaf relay-for-sent-count {
          type uint32;
          mandatory true;
          description
            "relay forward sent counter";
        }

        leaf relay-rep-sent-count {
          type uint32;
          mandatory true;
          description
            "relay reply sent counter";
        }

        leaf discarded-packet-count {
          type uint32;
          mandatory true;
          description
            "discarded packet counter";
        }
      }  // container relay-stats
    }  // container relay

    container client {
      presence "Enables client";
      description "dhcpv6 client portion";
      container duid {
        description "Sets the DUID";
        uses duid;
      }  // container duid

      list client-if {
        key "if-name";
        description
          "A client may have several
        interfaces, it is more reasonable to
        configure and manage parameters on
        the interface-level. The list defines
        specific client interfaces and their
        data. Different interfaces are distinguished
        by the key which is a configurable string
        value.";
        leaf if-name {
          type string;
          mandatory true;
          description "interface name";
        }

        leaf cli-id {
          type uint32;
          mandatory true;
          description "client id";
        }

        leaf description {
          type string;
          description
            "description of the client interface";
        }

        leaf pd-function {
          type boolean;
          mandatory true;
          description
            "Whether the client
          can act as a requesting router
          to request prefixes using prefix
          delegation ([RFC3633]).";
        }

        leaf rapid-commit {
          type boolean;
          mandatory true;
          description
            "'1' indicates a client can
          initiate a Solicit-Reply message exchange
          by adding a Rapid Commit option in Solicit
          message. '0' means the client is not allowed
          to add a Rapid Commit option to request
          addresses in a two-message exchange
          pattern.";
        }

        container mo-tab {
          description
            "The management tab
          label indicates the operation
          mode of the DHCPv6 client. 'm'=1
          and 'o'=1 indicate the client
          will use DHCPv6 to obtain all
          the configuration data. 'm'=1
          and 'o'=0 are a meaningless
          combination. 'm'=0 and 'o'=1
          indicate the client will use
          stateless DHCPv6 to obtain
          configuration data apart from
          addresses/prefixes data.
          'm'=0 and 'o'=0 represent the
          client will not use DHCPv6
          but use SLAAC to achieve
          configuration.";
          leaf m-tab {
            type boolean;
            mandatory true;
            description "m tab";
          }

          leaf o-tab {
            type boolean;
            mandatory true;
            description "o tab";
          }
        }  // container mo-tab

        container oro-options {
          description "oro options";
          list oro-option {
            key "option-code";
            description "oro option";
            leaf option-code {
              type uint16;
              mandatory true;
              description "option code";
            }

            leaf description {
              type string;
              mandatory true;
              description
                "description of oro
              options";
            }
          }  // list oro-option
        }  // container oro-options

        container client-configured-options {
          description
            "client configured options";
          list new-or-standard-cli-option {
            key "option-code";
            description
              "new or standard client option";
            leaf option-code {
              type uint16;
              mandatory true;
              description "option code";
            }

            leaf option-name {
              type string;
              mandatory true;
              description "option name";
            }

            leaf option-description {
              type string;
              mandatory true;
              description
                "description of client
              option";
            }

            leaf option-reference {
              type string;
              description
                "the reference of option";
            }

            leaf option-value {
              type string;
              mandatory true;
              description "the option value";
            }
          }  // list new-or-standard-cli-option

          container user-class-option {
            description "user class option";
            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
              option will be configured at the
              client";
            }

            list user-class {
              key "user-class-id";
              description "user class";
              leaf user-class-id {
                type uint8;
                mandatory true;
                description "user class id";
              }

              leaf user-class-info {
                type string;
                mandatory true;
                description
                  "user class info";
              }
            }  // list user-class
          }  // container user-class-option

          container vendor-class-option {
            description
              "vendor class option";
            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
              option will be configured at the
              client";
            }

            leaf ent-num {
              type uint32;
              mandatory true;
              description
                "enterprise number";
            }

            leaf-list data {
              type string;
              description "option data";
            }
          }  // container vendor-class-option

          container client-fqdn-option {
            description "client fqdn option";
            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
              option will be configured at the
              client";
            }

            leaf fqdn {
              type string;
              mandatory true;
              description "fqdn";
            }

            leaf server-initiate-update {
              type boolean;
              mandatory true;
              description
                "whether server initiate";
            }

            leaf client-initiate-update {
              type boolean;
              mandatory true;
              description
                "whether client initiate";
            }
          }  // container client-fqdn-option

          container client-architecture-type-option {
            description
              "client architecture type option";
            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
              option will be configured at the
              client";
            }

            list architecture-types {
              key "type-id";
              description
                "architecture types";
              leaf type-id {
                type uint16;
                mandatory true;
                description "type id";
              }

              leaf most-preferred {
                type boolean;
                mandatory true;
                description
                  "most preferred flag";
              }
            }  // list architecture-types
          }  // container client-architecture-type-option

          container client-network-interface-option {
            description
              "client network interface option";
            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
              option will be configured at the
              client";
            }

            leaf type {
              type uint8;
              mandatory true;
              description "type";
            }

            leaf major {
              type uint8;
              mandatory true;
              description "major";
            }

            leaf minor {
              type uint8;
              mandatory true;
              description "minor";
            }
          }  // container client-network-interface-option

          container kerberos-principal-name-option {
            description
              "kerberos principal name option";
            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
              option will be configured at the
              client";
            }

            leaf principal-name {
              type string;
              mandatory true;
              description "principal name";
            }
          }  // container kerberos-principal-name-option

          container client-link-layer-addr-option {
            description
              "client link layer address option";
            leaf enable {
              type boolean;
              mandatory true;
              description
                "indicate whether this
              option will be configured at the
              client";
            }

            leaf link-layer-type {
              type uint16;
              mandatory true;
              description "link layer type";
            }

            leaf link-layer-addr {
              type string;
              mandatory true;
              description
                "link layer address";
            }
          }  // container client-link-layer-addr-option
        }  // container client-configured-options

        container identity-associations {
          config false;
          description
            "IA is a construct through
          which a server and a client can identify,
                group, and manage a set of related IPv6
                  addresses. The key of the list is a
                  4-byte number IAID defined in [RFC3315].";
          list identity-association {
            key "iaid";
            description "IA";
            leaf iaid {
              type uint32;
              mandatory true;
              description "IAID";
            }

            leaf ia-type {
              type string;
              mandatory true;
              description "IA type";
            }

            leaf-list ipv6-addr {
              type inet:ipv6-address;
              description "ipv6 address";
            }

            leaf-list ipv6-prefix {
              type inet:ipv6-prefix;
              description "ipv6 prefix";
            }

            leaf-list prefix-length {
              type uint8;
              description
                "ipv6 prefix length";
            }

            leaf t1-time {
              type yang:timeticks;
              mandatory true;
              description "t1 time";
            }

            leaf t2-time {
              type yang:timeticks;
              mandatory true;
              description "t2 time";
            }

            leaf preferred-lifetime {
              type yang:timeticks;
              mandatory true;
              description
                "preferred lifetime";
            }

            leaf valid-lifetime {
              type yang:timeticks;
              mandatory true;
              description "valid lifetime";
            }
          }  // list identity-association
        }  // container identity-associations

        container if-other-paras {
          config false;
          description
            "A client can obtain
          extra configuration data other than
          address and prefix information through
          DHCPv6. This container describes such
          data the client was configured. The
          potential configuration data may
          include DNS server addresses, SIP
          server domain names, etc.";
          leaf-list uni-dhcpv6-serv-addr {
            type inet:ipv6-address;
            description
              "unicast server address";
          }

          container dns-paras {
            description "dns parameters";
            leaf domain-search-list {
              type string;
              mandatory true;
              description
                "domain search list";
            }

            list dns-servers {
              key "dns-serv-id";
              description "dns servers";
              leaf dns-serv-id {
                type uint8;
                mandatory true;
                description "dns server id";
              }

              leaf dns-serv-addr {
                type inet:ipv6-address;
                mandatory true;
                description
                  "dns server address";
              }
            }  // list dns-servers
          }  // container dns-paras

          container sip-paras {
            description "sip parameters";
            list sip-servers {
              key "sip-serv-id";
              description "sip server info";
              leaf sip-serv-id {
                type uint8;
                mandatory true;
                description "sip server id";
              }

              leaf sip-serv-addr {
                type inet:ipv6-address;
                mandatory true;
                description
                  "sip server address";
              }

              leaf sip-serv-domain-name {
                type string;
                mandatory true;
                description
                  "sip server domain name";
              }
            }  // list sip-servers
          }  // container sip-paras

          container nis-paras {
            description "nis parameters";
            leaf nis-domain-name {
              type string;
              mandatory true;
              description "nis domain name";
            }

            list nis-server {
              key "nis-serv-id";
              description "nis server";
              leaf nis-serv-id {
                type uint8;
                mandatory true;
                description "nis server id";
              }

              leaf nis-serv-addr {
                type inet:ipv6-address;
                mandatory true;
                description
                  "nis server address";
              }
            }  // list nis-server
          }  // container nis-paras

          container nis-plus-paras {
            description "nisp parameters";
            leaf nis-plus-domain-name {
              type string;
              mandatory true;
              description "nisp domian name";
            }

            list nis-plus-server {
              key "nis-plus-serv-id";
              description "nisp server";
              leaf nis-plus-serv-id {
                type uint8;
                mandatory true;
                description "nisp server id";
              }

              leaf nis-plus-serv-addr {
                type inet:ipv6-address;
                mandatory true;
                description
                  "nisp server address";
              }
            }  // list nis-plus-server
          }  // container nis-plus-paras

          leaf info-refresh-time {
            type yang:timeticks;
            description "info refresh time";
          }

          container time-zone-paras {
            description
              "time zone parameters";
            leaf tz-posix {
              type string;
              mandatory true;
              description "tz posix";
            }

            leaf tz-database {
              type string;
              mandatory true;
              description "tz database";
            }
          }  // container time-zone-paras

          leaf cli-fqdn {
            type string;
            description "client fqdn";
          }

          container ntp-paras {
            description "ntp parameters";
            list ntp-server {
              key "ntp-serv-id";
              description "ntp server";
              leaf ntp-serv-id {
                type uint8;
                mandatory true;
                description "ntp server id";
              }

              leaf ntp-serv-addr {
                type inet:ipv6-address;
                mandatory true;
                description
                  "ntp server address";
              }

              leaf ntp-serv-mul-addr {
                type inet:ipv6-address;
                mandatory true;
                description
                  "ntp server multicast
                address";
              }

              leaf ntp-serv-fqdn {
                type string;
                mandatory true;
                description
                  "ntp server fqdn";
              }
            }  // list ntp-server
          }  // container ntp-paras

          container sntp-paras {
            description "sntp parameters";
            list sntp-server {
              key "sntp-serv-id";
              description "sntp server";
              leaf sntp-serv-id {
                type uint8;
                mandatory true;
                description "sntp server id";
              }

              leaf sntp-serv-addr {
                type inet:ipv6-address;
                mandatory true;
                description
                  "sntp server address";
              }
            }  // list sntp-server
          }  // container sntp-paras

          container network-boot-paras {
            description
              "network boot parameters";
            list boot-file {
              key "boot-file-id";
              description "boot file";
              leaf boot-file-id {
                type uint8;
                mandatory true;
                description "boot file id";
              }

              leaf-list suitable-arch-type {
                type uint16;
                description
                  "architecture type";
              }

              leaf-list suitable-net-if {
                type uint32;
                description
                  "network interface";
              }

              leaf boot-file-url {
                type string;
                mandatory true;
                description "boot file url";
              }

              list boot-file-paras {
                key "para-id";
                description
                  "boot file parameters";
                leaf para-id {
                  type uint8;
                  mandatory true;
                  description "parameter id";
                }

                leaf parameter {
                  type string;
                  mandatory true;
                  description
                    "parameter value";
                }
              }  // list boot-file-paras
            }  // list boot-file
          }  // container network-boot-paras

          container kerberos-paras {
            description
              "kerberos parameters";
            leaf default-realm-name {
              type string;
              mandatory true;
              description
                "default realm name";
            }

            list kdc-info {
              key "kdc-id";
              description "kdc info";
              leaf kdc-id {
                type uint8;
                mandatory true;
                description "kdc id";
              }

              leaf priority {
                type uint16;
                mandatory true;
                description "priority";
              }

              leaf weight {
                type uint16;
                mandatory true;
                description "weight";
              }

              leaf transport-type {
                type uint8;
                mandatory true;
                description "transport type";
              }

              leaf port-number {
                type uint16;
                mandatory true;
                description "port number";
              }

              leaf kdc-ipv6-addr {
                type inet:ipv6-address;
                mandatory true;
                description
                  "kdc ipv6 address";
              }

              leaf realm-name {
                type string;
                mandatory true;
                description "realm name";
              }
            }  // list kdc-info
          }  // container kerberos-paras

          container addr-selection-paras {
            description
              "address selection parameters";
            leaf automatic-row-add {
              type boolean;
              mandatory true;
              description "row add";
            }

            leaf prefer-temporary-addr {
              type boolean;
              mandatory true;
              description "prefer temporary";
            }

            list policy-table {
              key "policy-id";
              description "policy table";
              leaf policy-id {
                type uint8;
                mandatory true;
                description "policy id ";
              }

              leaf label {
                type uint8;
                mandatory true;
                description "label";
              }

              leaf precedence {
                type uint8;
                mandatory true;
                description "precedence";
              }

              leaf prefix-len {
                type uint8;
                mandatory true;
                description "prefix length";
              }

              leaf prefix {
                type inet:ipv6-prefix;
                mandatory true;
                description "prefix";
              }
            }  // list policy-table
          }  // container addr-selection-paras

          leaf sol-max-rt {
            type yang:timeticks;
            mandatory true;
            description "sol max rt";
          }

          leaf inf-max-rt {
            type yang:timeticks;
            mandatory true;
            description "inf max rt";
          }

          container pcp-server-paras {
            description
              "pcp server parameters";
            list pcp-server {
              key "pcp-serv-id";
              description "pcp server";
              leaf pcp-serv-id {
                type uint8;
                mandatory true;
                description "pcp server id";
              }

              leaf pcp-serv-addr {
                type inet:ipv6-address;
                mandatory true;
                description
                  "pcp server address";
              }
            }  // list pcp-server
          }  // container pcp-server-paras

          container s46-rule-paras {
            description
              "s46 rule parameters";
            list s46-rule {
              key "rule-id";
              description "s46 rule";
              leaf rule-id {
                type uint8;
                mandatory true;
                description "rule id";
              }

              leaf rule-type {
                type enumeration {
                  enum "BMR" {
                    value 0;
                    description "BMR";
                  }
                  enum "FMR" {
                    value 1;
                    description "FMR";
                  }
                }
                mandatory true;
                description "rule type";
              }

              leaf ea-len {
                type uint8;
                mandatory true;
                description "EA bits length";
              }

              leaf prefix4-len {
                type uint8;
                mandatory true;
                description
                  "ipv4 prefix length";
              }

              leaf ipv4-prefix {
                type inet:ipv4-prefix;
                mandatory true;
                description "ipv4 prefix";
              }

              leaf prefix6-len {
                type uint8;
                mandatory true;
                description
                  "ipv6 prefix length";
              }

              leaf ipv6-prefix {
                type inet:ipv6-prefix;
                mandatory true;
                description "ipv6 prefix";
              }

              uses portset-para;
            }  // list s46-rule
          }  // container s46-rule-paras

          container s46-br-paras {
            description "s46 br parameters";
            list br {
              key "br-id";
              description "br";
              leaf br-id {
                type uint8;
                mandatory true;
                description "br id";
              }

              leaf br-ipv6-addr {
                type inet:ipv6-address;
                mandatory true;
                description
                  "br ipv6 address";
              }
            }  // list br
          }  // container s46-br-paras

          container s46-dmr-paras {
            description "s46 dmr parameters";
            list dmr {
              key "dmr-id";
              description "dmr";
              leaf dmr-id {
                type uint8;
                mandatory true;
                description "dmr id";
              }

              leaf dmr-prefix-len {
                type uint8;
                mandatory true;
                description
                  "dmr prefix length";
              }

              leaf dmr-ipv6-prefix {
                type inet:ipv6-prefix;
                mandatory true;
                description "dmr prefix";
              }
            }  // list dmr
          }  // container s46-dmr-paras

          container s46-v4-v6-binding-paras {
            description
              "s46 v4 v6 binding parameters";
            leaf ipv4-addr {
              type inet:ipv4-address;
              mandatory true;
              description "ipv4 address";
            }

            leaf bind-prefix6-len {
              type uint8;
              mandatory true;
              description "bind ipv6 prefix";
            }

            uses portset-para;

            leaf erp-local-domain-name {
              type string;
              mandatory true;
              description
                "erp local domain name";
            }
          }  // container s46-v4-v6-binding-paras

          container supported-options {
            description "supported options";
            list supported-option {
              key "option-code";
              description "supported option";
              leaf option-code {
                type uint16;
                mandatory true;
                description "option code";
              }

              leaf description {
                type string;
                mandatory true;
                description
                  "description of supported
                option";
              }
            }  // list supported-option
          }  // container supported-options
        }  // container if-other-paras

        container packet-stats {
          config false;
          description
            "A container records
          all the packet status information
          of a specific interface.";
          leaf solicit-count {
            type uint32;
            mandatory true;
            description "solicit counter";
          }

          leaf request-count {
            type uint32;
            mandatory true;
            description "request counter";
          }

          leaf renew-count {
            type uint32;
            mandatory true;
            description "renew counter";
          }

          leaf rebind-count {
            type uint32;
            mandatory true;
            description "rebind counter";
          }

          leaf decline-count {
            type uint32;
            mandatory true;
            description "decline counter";
          }

          leaf release-count {
            type uint32;
            mandatory true;
            description "release counter";
          }

          leaf info-req-count {
            type uint32;
            mandatory true;
            description
              "information request counter";
          }

          leaf advertise-count {
            type uint32;
            mandatory true;
            description "advertise counter";
          }

          leaf confirm-count {
            type uint32;
            mandatory true;
            description "confirm counter";
          }

          leaf reply-count {
            type uint32;
            mandatory true;
            description "reply counter";
          }

          leaf reconfigure-count {
            type uint32;
            mandatory true;
            description "recofigure counter";
          }
        }  // container packet-stats
      }  // list client-if
    }  // container client

    notification notifications {
      description
        "dhcpv6 notification module";
      container dhcpv6-server-event {
        description "dhcpv6 server event";
        container pool-running-out {
          description
            "raised when the
          address/prefix pool is going to
          run out.  A threshold for utilization
          ratio of the pool has been defined in
          the server feature so that it will
          notify the administrator when the
          utilization ratio reaches the threshold,
                      and such threshold is a settable
                        parameter";
          leaf utilization-ratio {
            type uint16;
            mandatory true;
            description "utilization ratio";
          }

          container duid {
            description "Sets the DUID";
            uses duid;
          }  // container duid

          leaf serv-name {
            type string;
            description "server name";
          }

          leaf pool-name {
            type string;
            mandatory true;
            description "pool name";
          }
        }  // container pool-running-out

        container invalid-client-detected {
          description
            "raised when the server
          has found a client which can be
          regarded as a potential attacker. Some
          description could also be included.";
          container duid {
            description "Sets the DUID";
            uses duid;
          }  // container duid

          leaf description {
            type string;
            description
              "description of the event";
          }
        }  // container invalid-client-detected
      }  // container dhcpv6-server-event

      container dhcpv6-relay-event {
        description "dhcpv6 relay event";
        container topo-changed {
          description
            "raised when the topology
          of the relay agent is changed.";
          leaf relay-if-name {
            type string;
            mandatory true;
            description
              "relay interface name";
          }

          leaf first-hop {
            type boolean;
            mandatory true;
            description "first hop";
          }

          leaf last-entity-addr {
            type inet:ipv6-address;
            mandatory true;
            description
              "last entity address";
          }
        }  // container topo-changed
      }  // container dhcpv6-relay-event

      container dhcpv6-client-event {
        description "dhcpv6 client event";
        container ia-lease-event {
          description
            "raised when the
          client was allocated a new IA from
          the server or it renew/rebind/release
          its current IA";
          leaf event-type {
            type enumeration {
              enum "allocation" {
                value 0;
                description "allocate";
              }
              enum "rebind" {
                value 1;
                description "rebind";
              }
              enum "renew" {
                value 2;
                description "renew";
              }
              enum "release" {
                value 3;
                description "release";
              }
            }
            mandatory true;
            description "event type";
          }

          container duid {
            description "Sets the DUID";
            uses duid;
          }  // container duid

          leaf iaid {
            type uint32;
            mandatory true;
            description "IAID";
          }

          leaf serv-name {
            type string;
            description "server name";
          }

          leaf description {
            type string;
            description
              "description of event";
          }
        }  // container ia-lease-event

        container invalid-ia-detected {
          description
            "raised when the identity
          association of the client can be proved
          to be invalid.  Possible condition includes
          duplicated address, illegal address, etc.";
          container duid {
            description "Sets the DUID";
            uses duid;
          }  // container duid

          leaf cli-duid {
            type uint32;
            mandatory true;
            description "duid of client";
          }

          leaf iaid {
            type uint32;
            mandatory true;
            description "IAID";
          }

          leaf serv-name {
            type string;
            description "server name";
          }

          leaf description {
            type string;
            description
              "description of the event";
          }
        }  // container invalid-ia-detected

        container retransmission-failed {
          description
            "raised when the retransmission
          mechanism defined in [RFC3315] is failed.";
          container duid {
            description "Sets the DUID";
            uses duid;
          }  // container duid

          leaf description {
            type enumeration {
              enum "MRC failed" {
                value 0;
                description "MRC failed";
              }
              enum "MRD failed" {
                value 1;
                description "MRD failed";
              }
            }
            mandatory true;
            description
              "description of failure";
          }
        }  // container retransmission-failed

        container failed-status-turn-up {
          description
            "raised when the client receives
          a message includes an unsuccessful Status Code
          option.";
          container duid {
            description "Sets the DUID";
            uses duid;
          }  // container duid

          leaf status-code {
            type enumeration {
              enum "1" {
                value 0;
                description "UnspecFail";
              }
              enum "2" {
                value 1;
                description "NoAddrAvail";
              }
              enum "3" {
                value 2;
                description "NoBinding";
              }
              enum "4" {
                value 3;
                description "NotOnLink";
              }
              enum "5" {
                value 4;
                description "UseMulticast";
              }
            }
            mandatory true;
            description
              "employed status code";
          }
        }  // container failed-status-turn-up
      }  // container dhcpv6-client-event
    }  // notification notifications
  }  // module ietf-dhcpv6