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 ············································································································································ 12

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

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

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

Overview ········································································································································································· 14

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

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

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

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

Configuring basic IGMP snooping features ················································································································ 18

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

Specifying an IGMP snooping version················································································································ 19

Setting the maximum number of IGMP snooping forwarding entries ······························································ 20

Configuring IGMP snooping port features ·················································································································· 20

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

Configuring static ports ········································································································································· 21

Configuring a port as a simulated member host ······························································································· 22

Enabling fast-leave processing ····························································································································· 22

Disabling a port from becoming a dynamic router port ··················································································· 23

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

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

Enabling the IGMP snooping querier ·················································································································· 24

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

Configuring parameters for IGMP messages ·············································································································· 25

Configuring source IP addresses for IGMP messages ······················································································· 26

Setting the 802.1p priority for IGMP messages ································································································ 26

Configuring IGMP snooping policies ··························································································································· 27

Configuring a multicast group policy ·················································································································· 27

Configuring multicast source port filtering ·········································································································· 28

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

Enabling IGMP report suppression ······················································································································ 29

Setting the maximum number of multicast groups on a port ············································································ 29

Enabling the multicast group replacement feature ····························································································· 29

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

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

Group policy configuration example ·················································································································· 31