D-Link DGS-3100-24 Product Manual - Page 98
Defining IGMP Snooping
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DGS-3100 Series Gigabit Stackable Managed Switch User Manual Defining IGMP Snooping When IGMP Snooping is enabled globally, all IGMP packets are forwarded to the CPU. The CPU analyzes the incoming packets and determines the following information: - Which ports want to join which Multicast groups. - Which ports have Multicast routers generating IGMP queries. - Which routing protocols are forwarding packets and Multicast traffic. Ports requesting to join a specific Multicast group issue an IGMP report, specifying that this Multicast group is accepting members. This results in the creation of the Multicast filtering database. IGMP Snooping configuration page supports also IGMP Querier. 1. Click L2 Features > IGMP Snooping. The IGMP Snooping Page opens: Figure 0-15. IGMP Snooping Page The IGMP Snooping Page contains the following fields: Field Description IGMP Snooping Enables or disables IGMP Snooping. Bridge Multicast Filtering must first be enabled in order to enable IGMP Snooping. The possible field values are: Enabled - Enables IGMP Snooping on the device. Disabled - Disables IGMP Snooping on the device. (This is the default value). VLAN ID Specifies the VLAN ID. VLAN Name Displays the user-defined VLAN name. Leave Timer Defines the time a host waits to receive a Join message from another station after requesting to leave the IGMP group, prior to timing out. If a Leave Timeout occurs, the switch notifies the Multicast device to stop sending traffic. The Leave Timeout value is either user-defined, or an immediate leave value. The default timeout is 10 seconds. The field range is 016711450 seconds. 82