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

    yang-version 1;

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

    prefix ip-tcp-cfg;

    import Cisco-IOS-XR-types {
      prefix xr;
    }
    import cisco-semver {
      prefix semver;
    }

    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-tcp package configuration.
     
     This module contains definitions
     for the following management objects:
       ip-tcp: Global IP TCP configuration
       ip: IP TCP Configuration Data
     
     Copyright (c) 2013-2020 by Cisco Systems, Inc.
     All rights reserved.";

    revision "2020-05-16" {
      description
        "Changed path for Telnet and TFTP";
    }

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

    revision "2018-02-14" {
      description
        "Added support for TCP-AO feature.";
    }

    revision "2017-09-30" {
      description
        "Ensure propagation of MDA mandatory state to YANG model.";
    }

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

    revision "2016-02-26" {
      description "Descriptions updated.";
    }

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

    semver:module-version "2.0.0";
    semver:module-version "1.0.1";

    grouping UDP {
      description
        "Common node of ipv4, ipv6";
      container udp {
        presence
          "Indicates a udp node is configured.";
        description "UDP details";
        leaf access-list-name {
          type string;
          description "Access list";
        }

        leaf maximum-server {
          type uint32 {
            range "0..2147483647";
          }
          description
            "Set number of allowable servers, 0 for no-limit";
        }

        leaf home-directory {
          type string;
          mandatory true;
          description
            "Specify device name where file is read from (e
           .g. flash:)";
        }

        leaf dscp-value {
          type uint32;
          description
            "Set IP DSCP (DiffServ CodePoint) for TFTP
           Server Packets";
        }
      }  // container udp
    }  // grouping UDP

    grouping SMALL-SERVERS {
      description
        "Common node of ipv4, ipv6";
      container small-servers {
        description
          "Describing IPV4 and IPV6 small servers";
        container tcp-small-servers {
          presence
            "Indicates a tcp-small-servers node is configured.";
          description
            "Describing TCP related IPV4 and IPV6 small
           servers";
          leaf access-control-list-name {
            type string;
            description
              "Specify the access list";
          }

          leaf small-server {
            type union {
              type enumeration {
                enum "no-limit" {
                  value 0;
                  description
                    "Unlimited Servers";
                }
              }
              type uint32 {
                range "0..2147483647";
              }
            }
            mandatory true;
            description
              "Set number of allowable TCP small servers,
             specify 0 for no-limit";
          }
        }  // container tcp-small-servers
      }  // container small-servers
    }  // grouping SMALL-SERVERS

    grouping VRF-TABLE {
      description
        "Common node of telnet, tftp";
      container vrfs {
        description "VRF table";
        list vrf {
          must "ipv4 or ipv6";
          key "vrf-name";
          description "VRF specific data";
          container ipv6 {
            description
              "IPV6 related services";
            uses TCP;

            uses UDP;
          }  // container ipv6

          container ipv4 {
            description
              "IPV4 related services";
            uses TCP;

            uses UDP;
          }  // container ipv4

          leaf vrf-name {
            type xr:Cisco-ios-xr-string;
            description
              "Name of the VRF instance";
          }
        }  // list vrf
      }  // container vrfs
    }  // grouping VRF-TABLE

    grouping TCP {
      description
        "Common node of ipv4, ipv6";
      container tcp {
        presence
          "Indicates a tcp node is configured.";
        description "TCP details";
        leaf access-list-name {
          type string;
          description "Access list";
        }

        leaf maximum-server {
          type uint32 {
            range "1..100";
          }
          mandatory true;
          description
            "Set number of allowable servers";
        }
      }  // container tcp
    }  // grouping TCP

    container ip-tcp {
      presence
        "Indicates a ip-tcp node is configured.";
      description
        "Global IP TCP configuration";
      container directory {
        presence
          "Indicates a directory node is configured.";
        description "TCP directory details";
        leaf directoryname {
          type string;
          mandatory true;
          description "Directory name ";
        }

        leaf max-debug-files {
          type uint32 {
            range "1..10000";
          }
          default "256";
          description
            "Set number of Debug files";
        }

        leaf max-file-size-files {
          type uint32 {
            range "1024..4294967295";
          }
          units "byte";
          description
            "Set size of debug files in bytes";
        }
      }  // container directory

      container throttle {
        presence
          "Indicates a throttle node is configured.";
        description
          "Throttle TCP receive buffer (in percentage)";
        leaf tcpmin-throttle {
          type uint32 {
            range "0..100";
          }
          mandatory true;
          description "Min throttle";
        }

        leaf tcpmaxthrottle {
          type uint32 {
            range "0..100";
          }
          mandatory true;
          description "Max throttle";
        }
      }  // container throttle

      container ao {
        description
          "TCP authentication option configuration mode";
        container keychains {
          description
            "Configure a Key Chain";
          list keychain {
            key "name";
            description
              "Name of the key chain";
            container keys {
              description "Configure a Key";
              list key {
                key "key-id";
                description "Key identifier";
                leaf key-id {
                  type xr:Cisco-ios-xr-string;
                  description
                    "48-bit Key identifier in range [0 -
                   281474976710655]";
                }

                leaf send-id {
                  type uint32 {
                    range "0..255";
                  }
                  mandatory true;
                  description "Send ID";
                }

                leaf receive-id {
                  type uint32 {
                    range "0..255";
                  }
                  mandatory true;
                  description "Receive ID";
                }
              }  // list key
            }  // container keys

            leaf create {
              type empty;
              description "Create keychain";
            }

            leaf name {
              type xr:Cisco-ios-xr-string {
                length "1..32";
              }
              description
                "Name of the key chain";
            }
          }  // list keychain
        }  // container keychains

        leaf enable {
          type empty;
          description
            "Create TCP-AO submode";
        }
      }  // container ao

      container num-thread {
        presence
          "Indicates a num-thread node is configured.";
        description
          "TCP InQueue and OutQueue threads";
        leaf tcp-in-q-threads {
          type uint32 {
            range "1..16";
          }
          mandatory true;
          description "InQ Threads";
        }

        leaf tcp-out-q-threads {
          type uint32 {
            range "1..16";
          }
          mandatory true;
          description "OutQ Threads";
        }
      }  // container num-thread

      leaf accept-rate {
        type uint32 {
          range "1..1000";
        }
        default "500";
        description
          "TCP connection accept rate";
      }

      leaf selective-ack {
        type empty;
        description
          "Enable TCP selective-ACK";
      }

      leaf window-size {
        type uint32 {
          range "2048..65535";
        }
        units "byte";
        description
          "TCP receive window size (bytes)";
      }

      leaf receive-q {
        type uint32 {
          range "40..800";
        }
        description "TCP receive Queue Size";
      }

      leaf maximum-segment-size {
        type uint32 {
          range "68..10000";
        }
        description
          "TCP initial maximum segment size";
      }

      leaf syn-wait-time {
        type uint32 {
          range "5..30";
        }
        units "second";
        description
          "Time to wait on new TCP connections in seconds";
      }

      leaf timestamp {
        type empty;
        description
          "Enable TCP timestamp option";
      }

      leaf path-mtu-discovery {
        type uint32;
        units "minute";
        default "10";
        description
          "Aging time; 0 for infinite, and range be (10,30)";
      }
    }  // container ip-tcp

    container ip {
      description
        "IP TCP Configuration Data";
      container cinetd {
        description
          "Cinetd configuration data";
        container services {
          description
            "Describing services of cinetd";
          container ipv4 {
            description
              "IPV4 related services";
            uses SMALL-SERVERS;
          }  // container ipv4

          container telnet {
            description
              "TELNET server configuration commands";
            uses VRF-TABLE;
          }  // container telnet

          container tftp {
            description
              "TFTP server configuration commands";
            uses VRF-TABLE;
          }  // container tftp

          container ipv6 {
            description
              "IPV6 related services";
            uses SMALL-SERVERS;
          }  // container ipv6
        }  // container services
      }  // container cinetd
    }  // container ip
  }  // module Cisco-IOS-XR-ip-tcp-cfg