module Cisco-IOS-XR-ipv4-io-cfg {

    yang-version 1;

    namespace
      "http://cisco.com/ns/yang/Cisco-IOS-XR-ipv4-io-cfg";

    prefix ipv4-io-cfg;

    import ietf-inet-types {
      prefix inet;
    }
    import Cisco-IOS-XR-types {
      prefix xr;
    }
    import cisco-semver {
      prefix semver;
    }
    import Cisco-IOS-XR-ifmgr-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 ipv4-io package configuration.
     
     This YANG module augments the
       Cisco-IOS-XR-ifmgr-cfg
     module with configuration data.
     
     Copyright (c) 2013-2020 by Cisco Systems, Inc.
     All rights reserved.";

    revision "2020-02-18" {
      description
        "Added new leaf icmp-unreach-disable.";
    }

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

    revision "2018-01-11" {
      description
        "DHCP IPv4 client to support options in cli.";
    }

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

    revision "2015-07-30" {
      description "Descriptions updated.";
    }

    revision "2015-01-07" {
      description "IOS XR 5.3.1 revision.";
    }

    semver:module-version "1.1.0";
    semver:module-version "1.0.0";

    typedef Ipv4-reachable {
      type enumeration {
        enum "any" {
          value 0;
          description
            "Source is reachable via any interface";
        }
        enum "received" {
          value 1;
          description
            "Source is reachable via interface on which
           packet was received";
        }
      }
      description "Ipv4 reachable";
    }

    typedef Ipv4-self-ping {
      type enumeration {
        enum "disabled" {
          value 0;
          description
            "Doesn't allow router to ping itself";
        }
        enum "enabled" {
          value 1;
          description
            "Allow router to ping itself";
        }
      }
      description "Ipv4 self ping";
    }

    typedef Ipv4-default-ping {
      type enumeration {
        enum "disabled" {
          value 0;
          description
            "Default route is not allowed to match when
           checking source address";
        }
        enum "enabled" {
          value 1;
          description
            "Allow default route to match when checking
           source address";
        }
      }
      description "Ipv4 default ping";
    }

    typedef Ipv4-interface-qppb {
      type enumeration {
        enum "ip-precedence" {
          value 1;
          description
            "Enable IP precedence based QPPB";
        }
        enum "qos-group" {
          value 2;
          description
            "Enable QoS-group based QPPB";
        }
        enum "both" {
          value 3;
          description
            "Enable both IP precedence and QoS-group based
           QPPB";
        }
      }
      description "Ipv4 interface qppb";
    }

    augment /a1:interface-configurations/a1:interface-configuration {
      description
        "This augment extends the configuration data of
       'Cisco-IOS-XR-ifmgr-cfg'";
      container ipv4-network {
        description
          "Interface IPv4 Network configuration data";
        container bgp-pa {
          description
            "Interface ipv4 bgp configuration";
          container input {
            description "Input";
            leaf source-accounting {
              type boolean;
              description
                "BGP PA configuration on source";
            }

            leaf destination-accounting {
              type boolean;
              description
                "BGP PA configuration on destination";
            }
          }  // container input

          container output {
            description "Output";
            leaf source-accounting {
              type boolean;
              description
                "BGP PA configuration on source";
            }

            leaf destination-accounting {
              type boolean;
              description
                "BGP PA configuration on destination";
            }
          }  // container output
        }  // container bgp-pa

        container verify {
          description
            "Enable Verify handling for this interface";
          leaf reachable {
            type Ipv4-reachable;
            description
              "Source is reachable via any interface or
             interface on which packet was received";
          }

          leaf self-ping {
            type Ipv4-self-ping;
            description
              "Allow router to ping itself (opens
             vulnerability in verification)";
          }

          leaf default-ping {
            type Ipv4-default-ping;
            description
              "Allow default route to match when checking
             source address";
          }
        }  // container verify

        container bgp {
          description
            "Interface ipv4 bgp configuration";
          container qppb {
            description
              "Interface ipv4 bgp policy propagation
             configuration";
            container input {
              description "Input";
              leaf source {
                type Ipv4-interface-qppb;
                description
                  "QPPB configuration on source";
              }

              leaf destination {
                type Ipv4-interface-qppb;
                description
                  "QPPB configuration on destination";
              }
            }  // container input
          }  // container qppb

          container flow-tag {
            description
              "Interface ipv4 bgp policy propagation flow tag
             configuration";
            container flow-tag-input {
              description "Input";
              leaf source {
                type boolean;
                description
                  "FlowTag configuration on source";
              }

              leaf destination {
                type boolean;
                description
                  "FlowTag configuration on destination";
              }
            }  // container flow-tag-input
          }  // container flow-tag
        }  // container bgp

        container addresses {
          description
            "Set the IP address of an interface";
          container secondaries {
            description
              "Specify a secondary address";
            list secondary {
              key "address";
              description
                "IP address and Mask";
              leaf address {
                type inet:ipv4-address-no-zone;
                description
                  "Secondary IP address";
              }

              leaf netmask {
                type inet:ipv4-address-no-zone;
                mandatory true;
                description "Netmask";
              }

              leaf route-tag {
                type uint32 {
                  range "1..4294967295";
                }
                description "RouteTag";
              }
            }  // list secondary
          }  // container secondaries

          container primary {
            presence
              "Indicates a primary node is configured.";
            description
              "IP address and Mask";
            leaf address {
              type inet:ipv4-address-no-zone;
              mandatory true;
              description "IP address";
            }

            leaf netmask {
              type inet:ipv4-address-no-zone;
              mandatory true;
              description "Netmask";
            }

            leaf route-tag {
              type uint32 {
                range "1..4294967295";
              }
              description "RouteTag";
            }
          }  // container primary

          leaf unnumbered {
            type xr:Interface-name;
            description
              "Enable IP processing without an explicit
             address";
          }

          leaf dhcp {
            type empty;
            description
              "IPv4 address and Mask negotiated via DHCP";
          }
        }  // container addresses

        container helper-addresses {
          description
            "The set of IP destination addresses for UDP
           broadcasts";
          list helper-address {
            key "address vrf-name";
            description
              "An IP destination addresses for UDP broadcasts";
            leaf address {
              type inet:ipv4-address-no-zone;
              description
                "IP destination address";
            }

            leaf vrf-name {
              type xr:Cisco-ios-xr-string {
                length "1..32";
              }
              description "VRF name";
            }
          }  // list helper-address
        }  // container helper-addresses

        leaf forwarding-enable {
          type empty;
          description
            "IPv4 forwarding to get enabled on an interface";
        }

        leaf icmp-unreach-disable {
          type empty;
          description
            "Disable ICMP unreachable for Nullx interface";
        }

        leaf icmp-mask-reply {
          type empty;
          description
            "The flag for enabling sending of ICMP mask
           reply messages";
        }

        leaf tcp-mss-adjust-enable {
          type empty;
          description
            "Enable TCP MSS Adjust on an interface";
        }

        leaf ttl-propagate-disable {
          type empty;
          description
            "Disable TTL propagate on an interface";
        }

        leaf point-to-point {
          type empty;
          description
            "Enable point-to-point handling for this
           interface.";
        }

        leaf mtu {
          type uint32 {
            range "68..65535";
          }
          description
            "The IP Maximum Transmission Unit";
        }
      }  // container ipv4-network
    }

    augment /a1:interface-configurations/a1:interface-configuration {
      description
        "This augment extends the configuration data of
       'Cisco-IOS-XR-ifmgr-cfg'";
      container ipv4-network-forwarding {
        description
          "Interface IPv4 Network configuration data also
         used for forwarding";
        leaf directed-broadcast {
          type empty;
          description
            "Enable forwarding of directed broadcast";
        }

        leaf unreachables {
          type empty;
          description
            "Disable sending ICMP unreachables";
        }

        leaf redirects {
          type empty;
          description
            "Enable sending ICMP Redirect messages";
        }
      }  // container ipv4-network-forwarding
    }
  }  // module Cisco-IOS-XR-ipv4-io-cfg