@techreport{hwang-ipsec-spiping-00,
    number =    {draft-hwang-ipsec-spiping-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-hwang-ipsec-spiping/00/},
    author =    {Yong Hwang},
    title =     {{SPI-Based health checking mechanism for IPSEC}},
    pagetotal = 6,
    year =      2003,
    month =     mar,
    day =       21,
    abstract =  {This document describes a diagnostic protocol for unexpected failures between IPSEC gateways. The method covers two parts as IKE{[}1{]} consists of two phases. One is echo request/reply message between two IPSEC gateways to confirm health of IKE peer and the other is exchanging of IPSEC-SA SPI to assure exact state of IPSEC-SA. Two new Notification Payload message type is defined, SPI-PING-REQUEST and SPI-PING-REPLY},
}