A Solution for Irregular IP Multicast Packet Flooding -- For Heavy Traffic IP Multicast Communication

Makoto MISUMI  Shin-ichi NAKAGAWA  Ken-ichi CHINEN  Yoichi SHINODA  Katsunori YAMAOKA  

IEICE TRANSACTIONS on Communications   Vol.E92-B   No.1   pp.68-76
Publication Date: 2009/01/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E92.B.68
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Networking Technologies for Dependable Networks)
IP multicast,  packet flooding,  IGMP snooping,  QoS,  irregular traffic,  

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When an IP Multicast network is constructed on a switch-based network, many IP Multicast packet broadcasts are generated, and these broadcasts cause trouble for all of the other kinds of communication. To solve this problem, implementing IGMP Snooping on various switches has been proposed. However, some switches have insufficient IP Multicast packet-handling capability. This problem is also mentioned in RFC4541. In this paper, we propose the IGMP Snooping Activator (ISA) mechanism as a way to solve the IP Multicast packet-handling problem. The ISA transmits dummy IGMP Queries to maintain the IP Multicast network, and it joins the flooding IP Multicast group to activate IGMP Snooping in switches that are unable to handle IP Multicast packets. The experimental evaluation shows the effectiveness of our proposed method: the network load decreases because of the method's effective restraint of IP Multicast packet flooding.