D-Link DGS-3100 Defining IGMP Snooping, 11. IGMP Snooping Page, Field, Description, Vlan Id

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.

1.Click L2 Features > IGMP Snooping. The IGMP Snooping Page opens:

	Figure 3–11. 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 0-

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