Summary of IGMP Snooping Configuration Tasks
Table 9-3 lists IGMP snooping configuration tasks.
Task |
Description |
|---|---|
| Configuring Basic IGMP Snooping Functions | When multicast data is forwarded to a Layer 2 multicast device connected to a user network segment, configure IGMP snooping on the Layer 2 multicast device to prevent multicast data from being flooded in the broadcast domain and to accurately forward multicast data at Layer 2. After IGMP snooping is configured, the Layer 2 multicast device can snoop and analyze IGMP messages between multicast users and the upstream router. The Layer 2 multicast device sets up Layer 2 multicast forwarding entries to control forwarding of multicast data. In this way, multicast data is not broadcast on the Layer 2 network. |
| Configuring the IGMP Snooping Policy | To filter out multicast messages on a Layer 2 multicast device or limit the range of multicast groups that hosts can join, configure an IGMP snooping policy on the Layer 2 multicast device. |
| Configuring Membership Fast-Update | To improve running efficiency of multicast services and user experience, configure quick membership update on a Layer 2 multicast device so that the Layer 2 multicast device quickly updates entries when receiver hosts join or leave a multicast group. |
| Configuring IGMP Snooping SSM Mapping | On a Layer 2 network, some receiver hosts can only run IGMPv1 or IGMPv2. To allow these hosts to use SSM, configure IGMP snooping SSM mapping on the Layer 2 multicast device. |