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The objective of this work was to implement Internet Group Management Protocol snooping to support multicast functionality on Linux-based Ethernet switch and carry out its performance evaluation. The implementation of the new functionality required modifications and improvements of two segments of the operating system: some parts of kernel and the user space management software. Algorithms and data structures, used for building multicast table, have been implemented in order to improve switching logic, which is now based on entries in the multicast table. Performance evaluation has been performed in a dedicated environment using a traffic analyzer, able to generate different types of traffic and traffic loads. The results are given for combinations of different loadings and numbers of target ports and prove that the implementation does not only decrease overall network load by reducing redundant broadcast flooding, but also increase the performance of switch by eliminating unnecessary frame forwarding, which eventually leads to lower frame losses and shorter queuing delays. [ABSTRACT FROM AUTHOR]

Home Gateway(HG), or called residential gateway(RG), is a device that connects an access network, WAN(Wide Area Network), to a home network(private network, generally). FTTH(Fiber To The Home) based HG is an HG with FTTH network as an access network interface. In this paper, we propose an implementation of FTTH based HG, specially EPON(Ethernet Passive Optical Network) based HG. With the FTTH access network interface, the proposed HG can provide service bandwidth of 100Mbps to 1Gbps to each subscriber. The network bandwidth is enough to provide various home network services for each one. We propose the novel home gateway's architecture to provide various services efficiently and show its implementation. The use of VLAN(Virtual Local Area Network) scheme to isolate two network domains, WAN of public network and LAN of private home network, within single L2 Ethernet switch and the direct packet forwarding scheme without L3 processing for some specific packet are key idea for the HG supporting various services proposed in this paper. To manage the direct forwarding table, we use the information acquired from IGMP snooping function of the L2 Ethernet switch. [ABSTRACT FROM AUTHOR]

Home network systems including a home gateway are expected to facilitate the convergence of broadcasting and communication services to complement the ubiquitous computing and services. We focus on supporting the convergence of broadcasting and communication in home network systems with an Ethernet passive optical network(EPON)-based home gateway. We propose a new architecture that integrates broadcasting and data services in a home network. For this architecture, we use an overlay transport mechanism in access network and IP multicast techniques of the Internet group management protocol(IGMP) and IGMP snooping in a home network. We also detail a set of mechanisms and procedures for a home broadcasting service through the home gateway system. Our new scheme is composed of three parts: a) an overlay transmission model of video broadcasting signals (satellite and/or cable TV) and Internet data, b) to select a specific video broadcasting channel and to make of the selected video broadcasting stream into IP multicast packets in tuner/conversion module using multiple tuner system and c) to transfer the converted IP multicast packets to L2 switch of home gateway's core module and to send them out to target port(s) by L2 multicast using IGMP snooping. [ABSTRACT FROM AUTHOR]