Qtech QSW-2870 [128/230] Chapter6

Qtech QSW-2870 [128/230] Chapter6
Chapter7 Security Configuration
6-1
Chapter6
IGMP Configuration
6.1 Summary
This chapter introduces configuration of QSW-2870 Switch
IGMP. This chapter includes the following section.
6.2 IGMP Snooping Configuration
6.2.1 IGMP Snooping Introduction
IGMP Snooping Basic Theory
IGMP Snooping is the abbreviation of Internet Group Management Protocol Snooping.
It is the multicast restriction mechanism running in the device of Layer-2. This protocol
establishes the mapping relationship for port and MAC multicast address by detecting
the IGMP message from user host to router in the network and analyzing the received
IGMP message. It forwards the multicast data according to this mapping relationship
so as to manage and control multicast group.
When the IGMP Snooping does not run in the Layer-2 device, the multicast data is
broadcast in the Layer-2. When the IGMP Snooping runs in the Layer-2 device, the
known multicast data will not be broadcast in the Layer-2 but will be multicast to the
designated receiver.
IGMP Snooping Advantages
IGMP Snooping has the following advantages.
Enhance the security of multicast information;
Reduce the broadcast message of Layer-2 network and save the bandwidth;
Provide convenience for separate account for each user host.
Content
Page
6.1 Summary
6-1
6.2 IGMP Snooping
6-1

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