Remote Service Discovery in the Service Location Protocol (SLP) via DNS SRV (RFC3832) (01-Jul-2004)

Network Working Group                                            W. Zhao

Request for Comments: 3832                                H. Schulzrinne

Category: Experimental                               Columbia University

                                                              E. Guttman

                                                        Sun Microsystems

                                                            C. Bisdikian

                                                               W. Jerome

                                                                     IBM

                                                               July 2004

                    Remote Service Discovery in the

              Service Location Protocol (SLP) via DNS SRV

Status of this Memo

   This memo defines an Experimental Protocol for the Internet

   community.  It does not specify an Internet standard of any kind.

   Discussion and suggestions for improvement are requested.

   Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2004).

Abstract

   Remote service discovery refers to discovering desired services in

   given remote (i.e., non-local) DNS domains.  This document describes

   remote service discovery in the Service Location Protocol (SLP) via

   DNS SRV.  It defines the DNS SRV Resource Records for SLP Directory

   Agent services, discusses various issues in using SLP and DNS SRV

   together for remote service discovery, and gives the steps for

   discovering desired services in remote DNS domains.

1.  Introduction

   This document describes remote service discovery in the Service

   Location Protocol (SLP) [RFC2608] via DNS SRV [RFC2782].  We consider

   remote service discovery as discovering desired services in given

   remote DNS domains, and local service discovery as discovering

   desired services within the local administrative domain.

   SLP provides a scalable framework for local service discovery and

   selection.  In SLP, User Agents (UAs) discover desired services in

   the local administrative domain by querying all Service Agents (SAs)

   via multicast or querying a Directory Agent (DA) via unicast.  To

Zhao, et al.                  Experimental                      [Page 1]

RFC 3832          Remote Discovery in SLP via DNS SRV          July 2004

   query a DA using unicast, a UA needs...