https://app.knowbase.one/vault/rfc/docid/8304
RFC7651: 3GPP IP Multimedia Subsystems (IMS) Option for the Internet Key Exchange Protocol Version 2 (IKEv2)
Independent Submission A. Dodd-Noble Request for Comments: 7651 S. Gundavelli Category: Informational Cisco ISSN: 2070-1721 J. Korhonen ...