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

Introduction to multicast ···················································································································································· 1

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

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

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

Multicast benefits and applications ························································································································ 4

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

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

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

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

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

Multicast support for VPNs ············································································································································ 11

Introduction to VPN instances ······························································································································ 11

Multicast application in VPNs ······························································································································ 12

Configuring IGMP snooping ····································································································································· 13

Overview ········································································································································································· 13

Basic IGMP snooping concepts ··························································································································· 13

How IGMP snooping works ································································································································· 15

Protocols and standards ······································································································································· 16

Feature and hardware compatibility ···························································································································· 16

IGMP snooping configuration task list ························································································································· 16

Configuring basic IGMP snooping functions ·············································································································· 17

Enabling IGMP snooping ····································································································································· 17

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

Setting the maximum number of IGMP snooping forwarding entries ······························································ 19

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

Setting aging timers for dynamic ports ··············································································································· 19

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

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

Enabling IGMP snooping fast-leave processing ································································································· 21

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

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

Configuration prerequisites ·································································································································· 23

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

Configuring parameters for IGMP queries and responses ··············································································· 23

Configuring parameters for IGMP messages ·············································································································· 24

Configuring source IP addresses for IGMP messages ······················································································· 24

Setting the 802.1p precedence for IGMP messages ························································································ 25

Configuring IGMP snooping policies ··························································································································· 26

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

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

Enabling dropping unknown multicast data ······································································································· 27

Enabling IGMP report suppression ······················································································································ 28

Setting the maximum number of multicast groups on a port ············································································ 28

Enabling the multicast group replacement function ··························································································· 29

Displaying and maintaining IGMP snooping ·············································································································· 30

IGMP snooping configuration examples ····················································································································· 31