H3C Technologies H3C S7500E Series Switches - Manual (Page 108)

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5
IGMP Configuration
When configuring IGMP, go to the following sections for the information you are interested in:
z IGMP Overview
z IGMP Configuration Task List
z IGMP Configuration Examples
z Troubleshooting IGMP
z The term "router" in this document refers to a router in a generic sense or a Layer 3 switch
running an IP routing protocol.
z The S7500E Series Ethernet Switches are distributed devices that support Intelligent
Resilient Framework (IRF). Two S7500E series can be connected together to form a
distributed IRF device. If an S7500E series is not in any IRF, it operates as a distributed
device; if the S7500E series is in an IRF, it operates as a distributed IRF device. For
introduction of IRF, refer to IRF Configuration in the IRF Configuration Guide.
IGMP Overview
As a TCP/IP protocol responsible for IP multicast group member management, the Internet
Group Management Protocol (IGMP) is used by IP hosts to establish and maintain their
multicast group memberships to immediately neighboring multicast routers.
IGMP Versions
So far, there are three IGMP versions:
z IGMPv1 (documented in RFC 1112)
z IGMPv2 (documented in RFC 2236)
z IGMPv3 (documented in RFC 3376)
All IGMP versions support the Any-Source Multicast (ASM) model. In addition to support of the
ASM model, IGMPv3 can be directly deployed to implement the Source-Specific Multicast (SSM)
model, while IGMPv1 and IGMPv2 need to work with the IGMP SSM mapping function to
implement the SSM model.