4
Multimedia Traffic Control with IP Multicast
(IGMP)
Contents
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
IGMP General Operation and Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
IGMP Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
IGMP Operating Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
CLI: Configuring and Displaying IGMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Web: Enabling or Disabling IGMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
How IGMP Operates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Operation With or Without IP Addressing . . . . . . . . . . . . . . . . . . . . . . 4-13
Automatic Fast-Leave IGMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Forced Fast-Leave IGMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
Configuration Options for Forced Fast-Leave . . . . . . . . . . . . . . . 4-15
Listing the Forced Fast-Leave Configuration . . . . . . . . . . . . . . . . 4-16
Configuring Per-Port Forced Fast-Leave IGMP . . . . . . . . . . . . . . . . . . 4-18
Using the Switch as Querier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19
Excluding Well-Known or Reserved Multicast Addresses from IP
Multicast Filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20
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