Chapter 25. Internet Group Management Protocol - Lenovo ThinkSystem NE2552E Application Manual

Chapter 25. Internet Group Management Protocol

© Copyright Lenovo 2018
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.
IGMP reports over the current 3K limit will be forwarded to a Mrouter. If no
Mrouter exists, such IGMP reports will be discarded. IGMPv2 leaves for groups
not known by the switch will also be forwarded to the multicast router.
The NE2552E Flex Switch (NE2552E) can perform IGMP Snooping, or act as an
IGMP Relay (proxy) device.
Note: Lenovo ENOS 8.4 does not support IPv6 for IGMP.
The following topics are discussed in this chapter:
 "IGMP Snooping" on page 358
 "IGMP Querier" on page 364
 "Additional IGMP Features" on page 365
357