submodule Cisco-IOS-XR-ip-tcp-oper-sub1 {

    yang-version 1;

    belongs-to Cisco-IOS-XR-ip-tcp-oper {
        prefix Cisco-IOS-XR-ip-tcp-oper;
    }

    import ietf-inet-types {
      prefix inet;
    }
    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 submodule contains a collection of YANG definitions
     for Cisco IOS-XR ip-tcp package operational data.
     
     Copyright (c) 2013-2020 by Cisco Systems, Inc.
     All rights reserved.";

    revision "2020-05-15" {
      description
        "First SYN delay timer added";
    }

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

    revision "2018-11-01" {
      description
        "Added socket async double free prevention count in tcp statistics summary";
    }

    revision "2018-02-14" {
      description
        "PCB_ID argument is passed in string format.";
    }

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

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

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

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

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

    typedef Nsr-down-reason {
      type enumeration {
        enum "none" {
          value 0;
          description
            "None, i.e. NSR was never up";
        }
        enum "init-sync-aborted" {
          value 1;
          description
            "Initial sync was aborted";
        }
        enum "client-disabled" {
          value 2;
          description
            "Disabled by Active APP";
        }
        enum "client-disconnect" {
          value 3;
          description
            "Standby APP disconnected";
        }
        enum "tcp-disconnect" {
          value 4;
          description
            "Standby TCP disconnected";
        }
        enum "failover" {
          value 5;
          description
            "RP/DRP Failover occurred";
        }
        enum "nsr-clear" {
          value 6;
          description "Clear nsr command";
        }
        enum "internal-error" {
          value 7;
          description
            "Internal error occurred";
        }
        enum "retransmit-threshold-exceed" {
          value 8;
          description
            "Retransmission threshold exceededprobably
           becauseS-TCP was not healthy";
        }
        enum
          "init-sync-failure-thresh-exceeded" {
          value 9;
          description
            "Init-sync repeat failures have exceeded
           threshold";
        }
        enum "audit-timeout" {
          value 10;
          description
            "Audit operation timed out";
        }
        enum "audit-failed" {
          value 11;
          description
            "Audit operation failed";
        }
        enum "standby-sscb-deleted" {
          value 12;
          description "Standby SSCB deleted";
        }
        enum "standby-session-close" {
          value 13;
          description
            "Session was closed on standby";
        }
        enum "standby-rxpath-frozen" {
          value 14;
          description
            "RX-Path was frozen on standby";
        }
        enum "partner-deleted" {
          value 15;
          description
            "Partner was deleted from set";
        }
      }
      description "NSR-Down Reasons";
    }

    typedef Nsr-status {
      type enumeration {
        enum "down" {
          value 0;
          description "NSR Stream Down";
        }
        enum "up" {
          value 1;
          description "NSR Stream Up";
        }
        enum "na" {
          value 2;
          description
            "NSR Stream Not applicable";
        }
      }
      description "NSR Stream Status";
    }

    typedef Addr-family {
      type enumeration {
        enum "internetwork" {
          value 2;
          description
            "Internetwork: UDP, TCP, etc.";
        }
        enum "ip-version6" {
          value 10;
          description "IP version 6";
        }
      }
      description "Address Family Types";
    }
  }  // submodule Cisco-IOS-XR-ip-tcp-oper-sub1