Interaction of RSVP with ATM for the Support of Shortcut QoS Virtual Channels

In principle, the interaction of RSVP and ATM should allow to benefit at the IP level from some features coming from the ATM layer. The most interesting feature is the native support of end-to-end Quality of Service provided by the ATM. On the other hand, there are issues that must be clarified to define a working solution for the interworking. For example, the possible overlapping between the mechanisms used in the IP level and in the ATM level to support QoS or the needed IP/ATM address resolution mechanism. This paper proposes a solution to exploit ATM shortcut VCs supporting the QoS in the Internet Integrated Service model. A straightforward enrichment to the RSVP protocol is defined, which only impact the devices involved in the shortcut procedure. A mechanism for IP/ATM address resolution is provided, avoiding the use of other mechanisms such as NHRP (Next Hop Resolution Protocol).