http://www.rfc-editor.org/rfc/rfc3082.txt
RFC 3082: Notification and Subscription for SLP, J. Kempf, J. Goldschmidt2001-03-01T23:00:00-00:00The Service Location Protocol (SLP) provides mechanisms whereby service agent clients can advertise and user agent clients can query for services. The design is very much demand-driven, so that user agents only obtain service information when they specifically ask for it. There exists another class of user agent applications, however, that requires notification when a new service appears or disappears. In the RFC 2608 design, these applications are forced to poll the network to catch changes. In this document, we describe a protocol for allowing such clients to be notified when a change occurs, removing the need for polling. This memo defines an Experimental Protocol for the Internet community.