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BMD00220, October 2010 249
CHAPTER 18
Internet Group Management Protocol
Internet Group Management Protocol (IGMP) is used by IPv4 Multicast routers to learn about the
existence of host group members on their directly attached subnet (see RFC 2236). The IPv4
Multicast routers get this information by broadcasting IGMP Membership Queries and listening for
IPv4 hosts reporting their host group memberships. This process is used to set up a client/server
relationship between an IPv4 Multicast source that provides the data streams and the clients that
want to receive the data.
The G8124 can perform IGMP Snooping, and connect to static multicast routers (Mrouters). The
G8124 can act as a Querier, and participate in the IGMP Querier election process.
Note – BLADEOS 6.5 does not support IPv6 for IGMP.
The following topics are discussed in this chapter:
“IGMP Snooping” on page 250
“IGMP Querier” on page 255
“IGMP Filtering” on page 256