module Cisco-IOS-XR-ip-ntp-cfg {

    yang-version 1;

    namespace
      "http://cisco.com/ns/yang/Cisco-IOS-XR-ip-ntp-cfg";

    prefix ip-ntp-cfg;

    import ietf-inet-types {
      prefix inet;
    }
    import Cisco-IOS-XR-types {
      prefix xr;
    }
    import cisco-semver {
      prefix semver;
    }
    import Cisco-IOS-XR-snmp-agent-cfg {
      prefix a1;
    }

    organization "Cisco Systems, Inc.";

    contact
      "Cisco Systems, Inc.
     Customer Service
     
     Postal: 170 West Tasman Drive
     San Jose, CA 95134
     
     Tel: +1 800 553-NETS
     
     E-mail: cs-yang@cisco.com";

    description
      "This module contains a collection of YANG definitions
     for Cisco IOS-XR ip-ntp package configuration.
     
     This module contains definitions
     for the following management objects:
       ntp: NTP configuration
     
     This YANG module augments the
       Cisco-IOS-XR-snmp-agent-cfg
     module with configuration data.
     
     Copyright (c) 2013-2019 by Cisco Systems, Inc.
     All rights reserved.";

    revision "2019-10-31" {
      description
        "Added mandatory nodes and presence containers.";
    }

    revision "2019-04-05" {
      description
        "Establish semantic version baseline.";
    }

    revision "2017-10-15" {
      description
        "Removed presence statement generated from internal CLI data.";
    }

    revision "2017-09-07" {
      description
        "Fixed type translation error.";
    }

    revision "2017-05-01" {
      description
        "Fixing backward compatibility error in module.";
    }

    revision "2015-11-09" {
      description "IOS XR 6.0 revision.";
    }

    semver:module-version "2.0.0";
    semver:module-version "1.0.0";

    typedef Ntp-prefer-peer {
      type empty;
      description "Prefer";
    }

    typedef Ntpdscp {
      type enumeration {
        enum "ntp-precedence" {
          value 0;
          description "Precedence Value";
        }
        enum "ntpdscp" {
          value 1;
          description "DSCP Value";
        }
      }
      description "Ntpdscp";
    }

    typedef Ntp-key-number {
      type uint32 {
        range "1..65535";
      }
      description "Ntp key number";
    }

    typedef Ntpttl {
      type uint32 {
        range "1..255";
      }
      description "Ntpttl";
    }

    typedef Ntp-burst {
      type empty;
      description "Burst";
    }

    typedef Ntpi-burst {
      type empty;
      description "IBurst";
    }

    typedef Ntp-version {
      type uint32 {
        range "2..4";
      }
      description "Ntp version";
    }

    typedef Ntp-peer {
      type enumeration {
        enum "peer" {
          value 0;
          description "Peer";
        }
        enum "server" {
          value 1;
          description "Server";
        }
      }
      description "Ntp peer";
    }

    typedef Ntp-access-af {
      type enumeration {
        enum "ipv4" {
          value 0;
          description "IPv4";
        }
        enum "ipv6" {
          value 1;
          description "IPv6";
        }
      }
      description "Ntp access af";
    }

    typedef Ntp-access {
      type enumeration {
        enum "peer" {
          value 0;
          description "Peer";
        }
        enum "serve" {
          value 1;
          description "Serve";
        }
        enum "serve-only" {
          value 2;
          description "Serve Only";
        }
        enum "query-only" {
          value 3;
          description "Query Only";
        }
      }
      description "Ntp access";
    }

    container ntp {
      description "NTP configuration";
      container admin-types {
        description
          "Configure NTP server admin-plane";
        list admin-type {
          key "peer-type";
          description
            "Configure NTP server admin plane";
          leaf peer-type {
            type Ntp-peer;
            description "Peer or Server";
          }

          leaf ntp-version {
            type Ntp-version;
            description "NTP version";
          }

          leaf authentication-key {
            type Ntp-key-number;
            description "Authentication Key";
          }

          leaf min-poll {
            type uint32 {
              range "4..17";
            }
            description
              "Minimum poll interval";
          }

          leaf max-poll {
            type uint32 {
              range "4..17";
            }
            description
              "Maxinum poll interval";
          }

          leaf preferred-peer {
            type Ntp-prefer-peer;
            description "Preferred peer";
          }

          leaf burst {
            type Ntp-burst;
            description "Use burst mode";
          }

          leaf iburst {
            type Ntpi-burst;
            description "Use iburst mode";
          }
        }  // list admin-type
      }  // container admin-types

      container peer-vrfs {
        description
          "Configures NTP Peers or Servers";
        list peer-vrf {
          key "vrf-name";
          description
            "Configures NTP Peers or Servers for a single
           VRF. The 'default' must also be specified for
           default VRF";
          container peer-ipv4s {
            description
              "Configures IPv4 NTP Peers or Servers";
            list peer-ipv4 {
              key "address-ipv4";
              description
                "Configure an IPv4 NTP server or peer";
              leaf address-ipv4 {
                type inet:ipv4-address-no-zone;
                description
                  "IPv4 Address of a peer";
              }

              list peer-type-ipv4 {
                key "peer-type";
                description
                  "Configure an IPv4 NTP server or peer";
                leaf peer-type {
                  type Ntp-peer;
                  description
                    "Peer or Server";
                }

                leaf ntp-version {
                  type Ntp-version;
                  description "NTP version";
                }

                leaf authentication-key {
                  type Ntp-key-number;
                  description
                    "Authentication Key";
                }

                leaf min-poll {
                  type uint32 {
                    range "4..17";
                  }
                  description
                    "Minimum poll interval";
                }

                leaf max-poll {
                  type uint32 {
                    range "4..17";
                  }
                  description
                    "Maxinum poll interval";
                }

                leaf preferred-peer {
                  type Ntp-prefer-peer;
                  description
                    "Preferred peer";
                }

                leaf source-interface {
                  type xr:Interface-name;
                  description
                    "Source interface of this peer";
                }

                leaf burst {
                  type Ntp-burst;
                  description
                    "Use burst mode";
                }

                leaf iburst {
                  type Ntpi-burst;
                  description
                    "Use iburst mode";
                }
              }  // list peer-type-ipv4
            }  // list peer-ipv4
          }  // container peer-ipv4s

          container peer-ipv6s {
            description
              "Configuration NTP Peers or Servers of IPV6";
            list peer-ipv6 {
              key "address-ipv6";
              description
                "Configure a NTP server or peer";
              leaf address-ipv6 {
                type inet:ipv6-address-no-zone;
                description
                  "Address of a peer";
              }

              list peer-type-ipv6 {
                key "peer-type";
                description
                  "Configure a NTP server or peer";
                leaf peer-type {
                  type Ntp-peer;
                  description
                    "Peer or Server";
                }

                leaf ntp-version {
                  type Ntp-version;
                  description "NTP version";
                }

                leaf authentication-key {
                  type Ntp-key-number;
                  description
                    "Authentication Key";
                }

                leaf min-poll {
                  type uint32 {
                    range "4..17";
                  }
                  description
                    "Minimum poll interval";
                }

                leaf max-poll {
                  type uint32 {
                    range "4..17";
                  }
                  description
                    "Maxinum poll interval";
                }

                leaf preferred-peer {
                  type Ntp-prefer-peer;
                  description
                    "Preferred peer";
                }

                leaf source-interface {
                  type xr:Interface-name;
                  description
                    "Source interface of this peer";
                }

                leaf burst {
                  type Ntp-burst;
                  description
                    "Use burst mode";
                }

                leaf iburst {
                  type Ntpi-burst;
                  description
                    "Use iburst mode";
                }

                leaf address-ipv6 {
                  type inet:ipv6-address-no-zone;
                  description "IPv6 address";
                }
              }  // list peer-type-ipv6
            }  // list peer-ipv6
          }  // container peer-ipv6s

          leaf vrf-name {
            type xr:Cisco-ios-xr-string;
            description "VRF name";
          }
        }  // list peer-vrf
      }  // container peer-vrfs

      container dscp-ipv4 {
        presence
          "Indicates a dscp-ipv4 node is configured.";
        description
          " Set IP DSCP value for outgoing NTP IPV4 packets";
        leaf mode {
          type Ntpdscp;
          mandatory true;
          description
            "NTPPRECEDENCE (0) to specify Precedence value
           NTPDSCP (1) to specify DSCP value";
        }

        leaf dscp-or-precedence-value {
          type uint32 {
            range "0..63";
          }
          mandatory true;
          description
            "If Mode is set to 'NTPPRECEDENCE(0)' specify
           Precedence value , if Mode is set to
           'NTPDSCP(1)' specify DSCP";
        }
      }  // container dscp-ipv4

      container dscp-ipv6 {
        presence
          "Indicates a dscp-ipv6 node is configured.";
        description
          " Set IP DSCP value for outgoing NTP IPV6 packets";
        leaf mode {
          type Ntpdscp;
          mandatory true;
          description
            "NTPPRECEDENCE(0) to specify Precedence value
           NTPDSCP(1) to specify DSCP value";
        }

        leaf dscp-or-precedence-value {
          type uint32 {
            range "0..63";
          }
          mandatory true;
          description
            "If Mode is set to 'NTPPRECEDENCE(0)' specify
           Precedence value , if Mode is set to
           'NTPDSCP(1)' specify DSCP";
        }
      }  // container dscp-ipv6

      container sources {
        description
          "Configure  NTP source interface";
        list source {
          key "vrf-name";
          description
            "Configure  NTP source interface";
          leaf vrf-name {
            type xr:Cisco-ios-xr-string;
            description "VRF name";
          }

          leaf source-interface {
            type xr:Interface-name;
            mandatory true;
            description
              "Source Interface for NTP";
          }
        }  // list source
      }  // container sources

      container drift {
        description "NTP drift";
        container file {
          presence
            "Contains mandatory nodes that used to set default values";
          description
            "File containing drift value";
          leaf location {
            type string;
            mandatory true;
            description
              "disk0 or apphost or config or ftp or harddisk
             or rootfs or tftp. Defaults to PWD if none
             specified";
          }

          leaf filename {
            type string;
            description
              "File containing drift value";
          }
        }  // container file

        leaf aging-time {
          type uint32 {
            range "0..65535";
          }
          description "Drift Aging Time";
        }
      }  // container drift

      container authentication {
        description
          "Configure NTP Authentication keys";
        container keys {
          description
            "Authentication Key Table";
          list key {
            key "key-number";
            description
              "Authentication key for trusted time sources";
            leaf key-number {
              type Ntp-key-number;
              description
                "Authentication Key number";
            }

            leaf authentication-key {
              type string;
              mandatory true;
              description
                "Authentication key - maximum 32 characters";
            }
          }  // list key
        }  // container keys

        container trusted-keys {
          description
            "Key numbers for trusted time sources";
          list trusted-key {
            key "key-number";
            description
              "Configure NTP trusted key";
            leaf key-number {
              type Ntp-key-number;
              description "Key number";
            }
          }  // list trusted-key
        }  // container trusted-keys

        leaf enable {
          type empty;
          description
            "Enable NTP authentication keys";
        }
      }  // container authentication

      container passive {
        description
          "Configure NTP passive associations";
        leaf enable {
          type empty;
          description
            "Enable NTP Passive associations";
        }
      }  // container passive

      container interface-tables {
        description
          "NTP per interface configuration";
        list interface-table {
          key "vrf-name";
          description
            "NTP per interface configuration";
          leaf vrf-name {
            type xr:Cisco-ios-xr-string;
            description "VRF name";
          }

          list interface {
            key "interface";
            description
              "Name of the interface";
            container interface-multicast {
              description
                "Configure NTP multicast service";
              container multicast-clients {
                description
                  "Configures multicast client peers";
                list multicast-client {
                  key "ip-address";
                  description
                    "Listen to NTP multicasts";
                  leaf ip-address {
                    type inet:ip-address-no-zone;
                    description
                      "IP address of a multicast group";
                  }
                }  // list multicast-client
              }  // container multicast-clients

              container multicast-servers {
                description
                  "Configures multicast server peers";
                list multicast-server {
                  key "ip-address";
                  description
                    "Configure NTP multicast group server peer";
                  leaf ip-address {
                    type inet:ip-address-no-zone;
                    description
                      "IP address of a multicast group";
                  }

                  leaf authentication-key {
                    type Ntp-key-number;
                    description
                      "Authentication key";
                  }

                  leaf version {
                    type Ntp-version;
                    description
                      "NTP version";
                  }

                  leaf ttl {
                    type Ntpttl;
                    description "TTL";
                  }
                }  // list multicast-server
              }  // container multicast-servers
            }  // container interface-multicast

            container interface-broadcast {
              description
                "Configure NTP broadcast service";
              container broadcast-servers {
                description
                  "Configure NTP broadcast";
                list broadcast-server {
                  key "broadcast-type";
                  description
                    "Configure NTP broadcast server";
                  leaf broadcast-type {
                    type xr:Cisco-ios-xr-string;
                    description
                      "Broadcast Type";
                  }

                  leaf address {
                    type inet:ipv4-address-no-zone;
                    description
                      "Destination broadcast IPv4 address";
                  }

                  leaf authentication-key {
                    type Ntp-key-number;
                    description
                      "Authentication key";
                  }

                  leaf ntp-version {
                    type Ntp-version;
                    description
                      "NTP version";
                  }
                }  // list broadcast-server
              }  // container broadcast-servers

              leaf broadcast-client {
                type empty;
                description
                  "Listen to NTP broadcasts";
              }
            }  // container interface-broadcast

            leaf disable {
              type empty;
              description "Disable NTP";
            }

            leaf interface {
              type xr:Interface-name;
              description "interface";
            }
          }  // list interface
        }  // list interface-table
      }  // container interface-tables

      container access-group-tables {
        description "Control NTP access";
        list access-group-table {
          key "vrf-name";
          description "Control NTP access";
          leaf vrf-name {
            type xr:Cisco-ios-xr-string;
            description "VRF name";
          }

          list access-group-af-table {
            key "af";
            description
              "Configure NTP access address family";
            leaf af {
              type Ntp-access-af;
              description "Address family";
            }

            list access-group {
              key "access-group-type";
              description
                "Configure NTP access group";
              leaf access-group-type {
                type Ntp-access;
                description
                  "Access group type";
              }

              leaf access-list-name {
                type string;
                mandatory true;
                description
                  "Access list name - maximum 32 characters";
              }
            }  // list access-group
          }  // list access-group-af-table
        }  // list access-group-table
      }  // container access-group-tables

      leaf max-associations {
        type uint32 {
          range "0..4294967295";
        }
        description
          "Set maximum number of associations";
      }

      leaf master {
        type uint32 {
          range "1..20";
        }
        default "8";
        description
          "Act as NTP master clock";
      }

      leaf broadcast-delay {
        type uint32 {
          range "1..999999";
        }
        description
          "Estimated round-trip delay";
      }

      leaf log-internal-sync {
        type empty;
        description
          "To enable logging internal sync conflicts";
      }

      leaf update-calendar {
        type empty;
        description
          "To enable calendar update with NTP time";
      }
    }  // container ntp
  }  // module Cisco-IOS-XR-ip-ntp-cfg