Patent ID: 8416777
Filing Date: 2013-04-09
Classification: H04L

Abstract:
1. A method for transmitting multicast data packets from a multicast router, the method comprising: a) the multicast router receiving, via one or more downstream network interfaces, multicast data requests made by a host; b) the multicast router reading information data contained in the multicast data requests; c) the multicast router storing state data based on the information data contained in the multicast data requests for a first downstream network interface, a first multicast group address, and the host that requests multicast data of the first multicast group address from the first downstream network interface, the state data comprising: d) the multicast router storing one or more of the INCLUDE state records for the first downstream network interface and the first multicast group address; and e) the multicast router transmitting, through the first downstream network interface, at least the multicast data packets which have as a destination IP address the first multicast group address and which have as a source IP address any source IP address from the union of all the source lists stored in the INCLUDE state records of the first downstream network interface and the first multicast group address and having a source-timer greater than zero.