@techreport{worley-sip-he-connection-01, number = {draft-worley-sip-he-connection-01}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-worley-sip-he-connection/01/}, author = {Olle E. Johansson and Gonzalo Salgueiro and Dale R. Worley}, title = {{Happy EarBalls: Success with Dual-Stack, Connection-Oriented SIP}}, pagetotal = 13, year = 2016, month = dec, day = 12, abstract = {The Session Initiation Protocol (SIP) supports multiple transports running both over IPv4 and IPv6 protocols. In more and more cases, a SIP user agent (UA) is connected to multiple network interfaces. In these cases setting up a connection from a dual stack client to a dual stack server may suffer from the issues described in RFC 6555 {[}RFC6555{]} ("Happy Eyeballs") - significant delays in the process of setting up a working flow to a server. This negatively affects user experience. This document builds on RFC 6555 and explains how a {[}RFC3261{]} compliant SIP implementation can minimize delays when contacting a host name (obtained by using DNS NAPTR and SRV lookups) in a dual stack network using connection-oriented transport protocols.}, }