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Table of Contents
1 Multicast Overview ····································································································································1-1
Multicast Overview··································································································································1-1
Information Transmission in the Unicast Mode ···············································································1-1
Information Transmission in the Broadcast Mode···········································································1-2
Information Transmission in the Multicast Mode·············································································1-3
Roles in Multicast ····························································································································1-4
Advantages and Applications of Multicast·······················································································1-5
Multicast Models ·····································································································································1-5
Multicast Architecture······························································································································1-6
Multicast Protocols ··························································································································1-9
Multicast Packet Forwarding Mechanism ·····························································································1-11
Implementation of the RPF Mechanism ························································································1-11
RPF Check ····································································································································1-12
2 IGMP Snooping Configuration ·················································································································2-1
IGMP Snooping Overview·······················································································································2-1
Principle of IGMP Snooping ············································································································2-1
Basic Concepts in IGMP Snooping ·································································································2-1
Work Mechanism of IGMP Snooping ······························································································2-2
IGMP Snooping Configuration ················································································································2-4
IGMP Snooping Configuration Task List ·························································································2-4
Enabling IGMP Snooping················································································································2-5
Configuring the Version of IGMP Snooping ····················································································2-5
Configuring Timers ··························································································································2-6
Configuring Fast Leave Processing ································································································2-6
Configuring a Multicast Group Filter································································································2-7
Configuring the Maximum Number of Multicast Groups on a Port··················································2-8
Configuring IGMP Querier···············································································································2-9
Suppressing Flooding of Unknown Multicast Traffic in a VLAN····················································2-10
Configuring Static Member Port for a Multicast Group··································································2-10
Configuring a Static Router Port····································································································2-11
Configuring a Port as a Simulated Group Member ·······································································2-12
Configuring a VLAN Tag for Query Messages··············································································2-13
Configuring Multicast VLAN ··········································································································2-13
Displaying and Maintaining IGMP Snooping·························································································2-15
IGMP Snooping Configuration Examples ·····························································································2-15
Configuring IGMP Snooping··········································································································2-15
Configuring Multicast VLAN ··········································································································2-17
Troubleshooting IGMP Snooping··········································································································2-19
3 Common Multicast Configuration············································································································3-1
Common Multicast Configuration············································································································3-1
Configuring a Multicast MAC Address Entry ···················································································3-1
Configuring Dropping Unknown Multicast Packets ·········································································3-2
Displaying and Maintaining Common Multicast Configuration································································3-2
