A Novel Multicore Multicasting Scheme for PIM-SM

Abstract

Shared tree multicast uses a single core to handle entire multicast traffic load in a domain. In this paper, we present a new multicast approach with multiple cores to reduce the traffic load. Main objective of our present work is to create a group-to-core mapping table a priori, i.e. even before a multicast session begins; it is done immediately after the network is booted. To the best of our knowledge, there does not exist any such multicast architecture for PIM SM related to load sharing. We select statically a set of k primary cores for possible load share with complexity O(n2). This selection is done immediately after the network is booted. At the same time, we create statically k partitions on all possible multicast addresses. The ith partition maps to the ith core in the list of k cores – this means that any new multicast session with multicast group address belonging to the ith partition will use the ith core from the list of k cores to implement PIM SM. In addition, we have incorporated fault tolerance in our approach to tackle the problem of any number of primary core failures.