@techreport{ietf-ipsecme-encrypted-esp-ping-03,
    number =    {draft-ietf-ipsecme-encrypted-esp-ping-03},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ietf-ipsecme-encrypted-esp-ping/03/},
    author =    {Antony Antony and Steffen Klassert},
    title =     {{Encrypted ESP Echo Protocol}},
    pagetotal = 11,
    year =      2026,
    month =     may,
    day =       4,
    abstract =  {This document defines the Encrypted ESP Echo Function, a mechanism to assess the reachability of IP Security (IPsec) network paths using Encapsulating Security Payload (ESP) packets. It detects end-to-end path status by exchanging only encrypted ESP packets between IPsec peers. The Encrypted Echo message can either use existing congestion control payloads from RFC9347 or a new message format defined here, with an option to specify a preferred return path when there is more than one pair of IPsec SAs between the same set of IPsec peers. A peer can announce support using a new IKEv2 Status Notification ENCRYPTED\_PING\_SUPPORTED.},
}