@misc{rfc7651,
    series =    {Request for Comments},
    number =    7651,
    howpublished =  {RFC 7651},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC7651},
    url =       {https://www.rfc-editor.org/info/rfc7651},
    author =    {Aeneas Noble and Sri Gundavelli and Jouni Korhonen and Florin Baboescu and Brian Weis},
    title =     {{3GPP IP Multimedia Subsystems (IMS) Option for the Internet Key Exchange Protocol Version 2 (IKEv2)}},
    pagetotal = 10,
    year =      2015,
    month =     sep,
    abstract =  {This document defines two new configuration attributes for the Internet Key Exchange Protocol version 2 (IKEv2). These attributes can be used for carrying the IPv4 address and IPv6 address of the Proxy-Call Session Control Function (P-CSCF). When an IPsec gateway delivers these attributes to an IPsec client, the IPsec client can obtain the IPv4 and/or IPv6 address of the P-CSCF server located in the 3GPP network.},
}