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

Introduction to multicast ···················································································································································· 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

Configuring IGMP snooping ····································································································································· 12

Overview ········································································································································································· 12

Basic concepts in IGMP snooping ······················································································································· 12

How IGMP snooping works ································································································································· 14

IGMP snooping proxying ····································································································································· 15

Protocols and standards ······································································································································· 17

IGMP snooping configuration task list ························································································································· 17

Configuring basic IGMP snooping functions ·············································································································· 18

Enabling IGMP snooping ····································································································································· 18

Specifying the version of IGMP snooping ·········································································································· 18

Configuring static multicast MAC address entries ····························································································· 19

Configuring IGMP snooping port functions ················································································································· 19

Setting aging timers for dynamic ports ··············································································································· 20

Configuring static ports ········································································································································· 20

Configuring a port as a simulated member host ······························································································· 21

Enabling IGMP snooping fast-leave processing ································································································· 22

Disabling a port from becoming a dynamic router port ··················································································· 22

Configuring IGMP snooping querier ··························································································································· 23

Enabling IGMP snooping querier ························································································································ 23

Configuring parameters for IGMP queries and responses ··············································································· 24

Configuring the source IP addresses for IGMP queries ····················································································· 25

Configuring IGMP snooping proxying ························································································································ 25

Enabling IGMP snooping proxying ····················································································································· 25

Configuring a source IP address for the IGMP messages sent by the proxy ·················································· 26

Configuring an IGMP snooping policy ························································································································ 26

Configuring a multicast group filter ····················································································································· 26

Configuring multicast source port filtering ·········································································································· 27

Enabling dropping unknown multicast data ······································································································· 28

Configuring IGMP report suppression ················································································································ 29

Setting the maximum number of multicast groups that a port can join ··························································· 29

Enabling multicast group replacement ················································································································ 30

Setting the 802.1p precedence for IGMP messages ························································································ 30

Enabling the IGMP snooping host tracking function ························································································· 31

Setting the DSCP value for IGMP messages ······································································································· 31

Displaying and maintaining IGMP snooping ·············································································································· 32

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

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