22Task RemarksConfiguring IGMPsnooping proxyingEnabling IGMP snooping proxying OptionalConfiguring a source IP address for the IGMP messages sent bythe proxy OptionalConfiguring an IGMPsnooping policyConfiguring a multicast group filter OptionalConfiguring multicast source port filtering OptionalEnabling dropping unknown multicast data OptionalConfiguring IGMP report suppression OptionalSetting the maximum number of multicast groups that a portcan join OptionalSetting the 802.1p precedence for IGMP messages OptionalEnabling multicast group replacement OptionalConfiguring a multicast user control policy OptionalEnabling the IGMP snooping host tracking function OptionalSetting the DSCP value for IGMP messages OptionalFor the configuration tasks in this section:• In IGMP snooping view, the configurations that you make are effective in all VLANs. In VLAN view,the configurations that you make are effective on only the ports that belong to the current VLAN. Fora given VLAN, a configuration that you make in IGMP snooping view is effective only if you do notmake the same configuration in VLAN view.• In IGMP snooping view, the configurations that you make are effective on all ports. In Layer 2Ethernet interface view or Layer 2 aggregate interface view, the configurations that you make areeffective only on the current port. In port group view, the configurations that you make are effectiveon all ports in the current port group. For a given port, a configuration that you make in IGMPsnooping view is effective only if you do not make the same configuration in Layer 2 Ethernetinterface view, Layer 2 aggregate interface view, or port group view.• For IGMP snooping, the configurations that you make on a Layer 2 aggregate interface do notinterfere with those you make on its member ports, nor do they participate in aggregationcalculations. Configurations that you make on a member port of an aggregate group do not takeeffect until it leaves the aggregate group.Configuring basic IGMP snooping functionsBefore you configure basic IGMP snooping functions, complete the following tasks:• Configure the corresponding VLANs.• Determine the version of IGMP snooping.
