%% You should probably cite rfc7651 instead of this I-D. @techreport{gundavelli-ipsecme-3gpp-ims-options-00, number = {draft-gundavelli-ipsecme-3gpp-ims-options-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-gundavelli-ipsecme-3gpp-ims-options/00/}, author = {Aeneas Noble and Sri Gundavelli and Jouni Korhonen and Florin Baboescu}, title = {{3GPP IMS Option for IKEv2}}, pagetotal = 8, year = 2013, month = feb, day = 18, abstract = {This document defines two new configuration attributes for Internet Key Exchange Protocol version 2 (IKEv2). These attributes can be used for carrying the IPv4 and IPv6 address of the Proxy-Call Control and Service function (P-CSCF). This is one of the few methods that an IPsec client can obtain the IP address of the P-CSCF function located in the home network.}, }