Client                              Server
                ----------                          ----------
  1)  --------------------- IKE_session ----------------------
      (IP_I1:UDP500 -> IP_R:UDP500)
      IKE_SA_INIT              ------->
      HDR, SAi1, KEi, Ni,
      [N(NAT_DETECTION_SOURCE_IP)],
      [N(NAT_DETECTION_DESTINATION_IP)]
                               <-------            IKE_SA_INIT
                                            HDR, SAr1, KEr, Nr,
                                  [N(NAT_DETECTION_SOURCE_IP)],
                              [N(NAT_DETECTION_DESTINATION_IP)]
      (IP_I1:UDP4500 -> IP_R:UDP4500)
      Non-ESP Marker           ------->
      IKE_AUTH
      HDR, SK { IDi, CERT, AUTH,
      SAi2, TSi, TSr,
      N(MOBIKE_SUPPORTED) }
                               <-------          Non-ESP Marker
                                                       IKE_AUTH
                                     HDR, SK { IDr, CERT, AUTH,
                                                SAr2, TSi, TSr,
                                          N(MOBIKE_SUPPORTED) }
      <---------------------> IKE/ESP Flow <------------------>
  2)  ------------ MOBIKE Attempt on New Network --------------
      (IP_I2:UDP4500 -> IP_R:UDP4500)
      Non-ESP Marker           ------->
      INFORMATIONAL
      HDR, SK { N(UPDATE_SA_ADDRESSES),
      N(NAT_DETECTION_SOURCE_IP),
      N(NAT_DETECTION_DESTINATION_IP) }
  3)  --------------------  TCP Connection  -------------------
      (IP_I2:Port_I -> IP_R:Port_R)
      TcpSyn                   ------->
                               <-------              TcpSyn,Ack
      TcpAck                   ------->
  4)  ---------------------  TLS Session  ---------------------
      ClientHello              ------->
                                                    ServerHello
                                          {EncryptedExtensions}
                                                 {Certificate*}
                                           {CertificateVerify*}
                               <-------              {Finished}
      {Finished}               ------->
  5)  ---------------------- Stream Prefix --------------------
      "IKETCP"                 ------->