Locating Session Initiation Protocol (SIP) Servers in a Dual-Stack IP Network (RFC7984)
Original Publication Date: 2016-Sep-01
Included in the Prior Art Database: 2016-Sep-30
Internet Society Requests For Comment (RFCs)
O. Johansson: AUTHOR [+5]
The Session Initiation Protocol (SIP) [RFC3261] and the additional documents that extended it provide support for both IPv4 and IPv6. However, this support does not fully extend to the highly hybridized environments that are characteristic of the transitional migratory phase from IPv4 to IPv6 networks. During this phase, many server and client implementations run on dual-stack hosts. In such environments, a dual-stack host will likely suffer greater connection delay, and by extension an inferior user experience, than an IPv4-only host. The need to remedy this diminished performance of dual-stack hosts led to the development of the "Happy Eyeballs" [RFC6555] algorithm, which has since been implemented in many protocols and applications.
Internet Engineering Task Force (IETF) O. Johansson Request for Comments: 7984 Edvina AB Updates: 3263 G. Salgueiro Category: Standards Track Cisco Systems ISSN: 2070-1721 V. Gurbani Bell Labs, Nokia Networks D. Worley, Ed. Ariadne September 2016
Locating Session Initiation Protocol (SIP) Servers in a Dual-Stack IP Network
RFC 3263 defines how a Session Initiation Protocol (SIP) implementation, given a SIP Uniform Resource Identifier (URI), should locate the next-hop SIP server using Domain Name System (DNS) procedures. As SIP networks increasingly transition from IPv4-only to dual-stack, a quality user experience must be ensured for dual- stack SIP implementations. This document updates the DNS procedures described in RFC 3263 for dual-stack SIP implementations in preparation for forthcoming specifications for applying "Happy Eyeballs" principles to SIP.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 7841.
Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc7984.
Johansson, et al. Standards Track [Page 1]
RFC 7984 Locating SIP Servers in IPv4/IPv6 September 2016
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