rfc-6023
A Childless Initiation of the Internet Key Exchange Version 2 (IKEv2) Security Association (SA)
This document describes an extension to the Internet Key Exchange version 2 (IKEv2) protocol that allows an IKEv2 Security Association (SA) to be created and authenticated without generating a Child SA. This document is not an Internet Standards Track specification; it is published for examination, experimental implementation, and evaluation.