We present and evaluate two experimental extensions to RSVP in terms of protocol specification and implementation. These extensions are targeted at apparent shortcomings of RSVP to carry out lightweight signalling for end systems. Instead of specifying new protocols, our approach in principle aims at developing an integrated protocol suite, initially in the framework set by RSVP. This work is based on our experience on implementing and evaluating the basic RSVP specification. The extensions will be incorporated in the next public release of our open source software.