Many researchers have explored enhancements of the Internet’s best-effort service model that allow real-time and other inelastic applications to obtain preferential Quality of Service. However, these applications are limited to utilizing the opportunistic, shortest-path routes provided by the current routing infrastructure.
This talk introduces extensions to interdomain multicast routing to scalably compute and install alternate paths and non-opportunistic, or pinned, routes. I will present a simple multicast setup protocol for installing alternate paths and discuss how it prevents loops. I will also discuss the results of a simulation study that demonstrate the viability of using localized route construction to find adequate alternate paths.