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Name: IGMP (v3) Multicast Functional Testing Adobe Reader
Type: Application Note
Size: 213 KB
Date: April 2002
 

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IGMP (v3) Multicast Functional Testing

Multicasting allows a host to send data packets across the Internet to a set of hosts that can be on different, geographically dispersed subnets. The source host sends data to a pseudo destination called a multicast group, and does so efficiently, using less bandwidth than unicast or broadcast traffic. Unlike unicast transmission, which would copy a packet to send it to multiple destinations, multicast sources send a packet only once.

Multicast routers connected to subnets use multicast group membership protocols like IGMP to discover which local hosts are members of which multicast groups, and to deliver multicasted packets to member hosts.

Current applications of multicasting include email distribution lists, routing information flooding, and web-based training seminars and voice/video conferences.

This application note describes how to use a 4-port Gigabit Ethernet module to simulate 3 different hosts and test a SUT’s implementation of IGMPv3 Source Specific Multicast and Include/Exclude filters.