Patent ID: 7908354
Filing Date: 2011-03-15
Classification: H04L

Abstract:
1. A process implemented in a multicast router having one or more downstream network interfaces and situated in a data network system between sources that send multicast packets to at least one multicast group address and one or more hosts that request data from the multicast group address and the sources, the multicast router storing for a downstream network interface and a multicast group address at least an INCLUDE record having an include source list containing a source or set of sources derived by data requests made by the one or more hosts and an EXCLUDE record having a requested list containing a source or set of sources and an exclude list containing a source or set of sources derived by data requests made by the one or more hosts, the process comprising modifying the INCLUDE record upon receiving a MODE_IS_INCLUDE type message from a host without modifying the EXCLUDE record.