Performance under a failure of wide-area datagram networks with unicast and multicast traffic routing

A major link or node failure in a network can severely affect services offered by the network. In this paper we address network performance, especially, in the event of a link failure in the presence of both unicast and multicast routing in wide-area datagram networks, such as the Internet. Since various services can exert different workloads (per connection/session), we have developed workloads to reflect both one-to-many and many-to-many multicast communications on top of multicast routing. Through network simulation, we quantify effects on how unicast services and multicast services are affected due to such a failure.