Multicast overview ······················································································································································· 1

Overview ············································································································································································ 1

Information transmission techniques ······················································································································· 1

Multicast features ······················································································································································ 3

Common notations in multicast ······························································································································· 4

Multicast advantages and applications ················································································································· 4

Multicast models ································································································································································ 5

Multicast architecture ························································································································································ 5

Multicast addresses ·················································································································································· 6

Multicast protocols ··················································································································································· 9

Multicast packet forwarding mechanism ····················································································································· 11

Multicast support for VPNs ············································································································································ 12

Introduction to VPN instances ······························································································································ 12

Multicast application in VPNs ······························································································································ 13

Configuring IGMP snooping ····································································································································· 14

Basic concepts in IGMP snooping ······················································································································· 14

How IGMP snooping works ································································································································· 16

IGMP snooping proxying ····································································································································· 17

Protocols and standards ······································································································································· 19

IGMP snooping configuration task list ························································································································· 19

Configuring basic IGMP snooping functions ·············································································································· 20

Enabling IGMP snooping ····································································································································· 20

Specifying the version of IGMP snooping ·········································································································· 20

Configuring the maximum number of global IGMP forwarding entries ·························································· 21

Configuring IGMP snooping port functions ················································································································· 21

Setting aging timers for dynamic ports ··············································································································· 22

Configuring static ports ········································································································································· 22

Configuring a port as a simulated member host ······························································································· 23

Enabling fast-leave processing ····························································································································· 24

Disabling a port from becoming a dynamic router port ··················································································· 25

Configuring IGMP snooping querier ··························································································································· 25

Enabling IGMP snooping querier ························································································································ 26

Configuring parameters for IGMP queries and responses ··············································································· 26

Configuring source IP address for IGMP queries ······························································································· 27

Configuring IGMP snooping proxying ························································································································ 28

Enabling IGMP snooping proxying ····················································································································· 28

Configuring the source IP address for the IGMP messages sent by the proxy ··············································· 28

Configuring IGMP snooping policies ··························································································································· 28

Configuring a multicast group filter ····················································································································· 29

Enabling dropping unknown multicast data ······································································································· 29

Enabling IGMP report suppression ······················································································································ 30

Setting the maximum number of multicast groups that a port can join ··························································· 30

Enabling multicast group replacement ················································································································ 31

Enabling the IGMP snooping host tracking function ························································································· 32

Displaying and maintaining IGMP snooping ·············································································································· 33

IGMP snooping configuration examples ····················································································································· 33

Group policy and simulated joining configuration example ············································································ 33