IGMP Snooping Configuration

Context

Configuring basic IGMP snooping functions in a VLAN enables the switch to create and maintain a Layer 2 multicast forwarding table, based on which multicast data packets can be forwarded accurately to receivers over the data link layer.

Multicast flows are considered unknown if they do not match any entry in the multicast forwarding table or if they match multicast forwarding entries with an empty outbound interface list. These flows are not requested by users. The default method that a switch uses to process unknown IPv4 multicast flows depends on whether Layer 2 multicast is enabled and which Layer 2 multicast forwarding mode is used:

If Layer 2 multicast is not enabled on a switch, the switch broadcasts unknown multicast flows.
If Layer 2 multicast is enabled on a switch, the switch broadcasts unknown multicast flows in a VLAN, regardless of which Layer 2 multicast forwarding mode is used.

Procedure

Choose Configuration > Advanced Services > IGMP Snooping and click the IGMP Snooping Configuration tab.
Click a configuration record of a VLAN enter the editing state, as shown in Figure 1.
Figure 1 IGMP Snooping Configuration
Set IGMP snooping parameters, such as IGMP Snooping and IGMP Version.
Click to complete the configuration.