submodule Cisco-IOS-XR-ip-tcp-oper-sub3 {

    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-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 Tcp-mac-algo {
      type enumeration {
        enum "not-configured" {
          value 0;
          description "Not configured";
        }
        enum "aes-128-cmac-96" {
          value 1;
          description "CMAC 96";
        }
        enum "hmac-sha1-12" {
          value 2;
          description "HMAC SHA1 12";
        }
        enum "md5-16" {
          value 3;
          description "MD5 16";
        }
        enum "sha1-20" {
          value 4;
          description "SHA1 20";
        }
        enum "hmac-md5-16" {
          value 5;
          description "HMAC MD5 16";
        }
        enum "hmac-sha1-20" {
          value 6;
          description "HMAC SHA1 20";
        }
        enum "aes-128-cmac" {
          value 7;
          description "AES 128 CMAC";
        }
        enum "aes-256-cmac" {
          value 8;
          description "AES 256 CMAC";
        }
        enum "hmac-sha1-96" {
          value 9;
          description "HMAC SHA1 96";
        }
        enum "hmac-sha-256" {
          value 10;
          description "HMAC SHA1 256";
        }
      }
      description
        "TCP AO MAC algorithm type";
    }

    typedef Tcp-key-invalid-reason {
      type enumeration {
        enum "none" {
          value 0;
          description "No reason";
        }
        enum "incomplete" {
          value 1;
          description "Incomplete";
        }
        enum "lifetime-not-same" {
          value 2;
          description
            "Send and accept lifetime are not same";
        }
        enum "send-id-invalid" {
          value 3;
          description "Send ID is invalid";
        }
        enum "recv-id-invalid" {
          value 4;
          description
            "Receive ID is invalid";
        }
      }
      description
        "TCP AO key state invalid reason";
    }

    typedef Tcp-timer {
      type enumeration {
        enum "retransmission-timer" {
          value 0;
          description "Retransmission timer";
        }
        enum "window-probe-timer" {
          value 1;
          description
            "Send Window Probe timer";
        }
        enum "timewait-state-timer" {
          value 2;
          description "TIMEWAIT state timer";
        }
        enum "ack-hold-timer" {
          value 3;
          description "ACK Hold timer";
        }
        enum "keep-alive-timer" {
          value 4;
          description "Keep Alive timer";
        }
        enum "pmtu-ager-timer" {
          value 5;
          description "PMTU Ager Timer";
        }
        enum "retransmission-giveup-timer" {
          value 6;
          description
            "Retransmission Giveup timer";
        }
        enum "throttle-timer" {
          value 7;
          description
            "Throttle (for PAW/xipc) timer";
        }
        enum "syn-delay-timer" {
          value 8;
          description
            "First SYN delay timer";
        }
      }
      description "TCP Timer Type";
    }

    typedef Pak-prio {
      type enumeration {
        enum "unspecified-packet" {
          value 0;
          description "Unspecified";
        }
        enum "normal-packet" {
          value 1;
          description
            "Normal: all traffic routed via this router,
           Telnet/FTP traffic generated from within this
           router";
        }
        enum "medium-packet" {
          value 2;
          description
            "Medium: Packets with low drop probability e.g.
           Routing updates & requests";
        }
        enum "high-packet" {
          value 3;
          description
            "High: Packets with very low drop probability
           and normal delivery e.g. L3 Keepalives like
           OSPF/ISIS Hellos";
        }
        enum "crucial-packet" {
          value 4;
          description
            "Crucial: Packets with very low drop probability
           and expedited delivery e.g L2 keepalives, HDLC
           Keepalives";
        }
      }
      description "Packet Priority Types";
    }

    typedef Tcp-in6-addr {
      type inet:ipv6-address;
      description "Tcp in6 addr";
    }

    typedef Tcp-conn-state {
      type enumeration {
        enum "closed" {
          value 0;
          description "Closed";
        }
        enum "listen" {
          value 1;
          description "Listen";
        }
        enum "syn-sent" {
          value 2;
          description "Syn sent";
        }
        enum "syn-received" {
          value 3;
          description "Syn received";
        }
        enum "established" {
          value 4;
          description "Established";
        }
        enum "close-wait" {
          value 5;
          description "Close wait";
        }
        enum "fin-wait1" {
          value 6;
          description "FIN Wait1";
        }
        enum "closing" {
          value 7;
          description "Closing";
        }
        enum "last-ack" {
          value 8;
          description "Last ack";
        }
        enum "fin-wait2" {
          value 9;
          description "FIN Wait2";
        }
        enum "time-wait" {
          value 10;
          description "Time wait";
        }
      }
      description "TCP Connection State";
    }

    typedef Tcp-address-family {
      type enumeration {
        enum "ipv4" {
          value 2;
          description "IPv4";
        }
        enum "ipv6" {
          value 10;
          description "IPv6";
        }
      }
      description "Address Family Type";
    }
  }  // submodule Cisco-IOS-XR-ip-tcp-oper-sub3