D-Link DSL-G604T manual Igmp Snooping, Master Port, Port Map, Active Port

	DGS-3024 Gigabit Ethernet Switch Manual
Master Port	Choose the Master Port for the trunk group using the pull-down menu.
Port Map	Choose the members of a trunked group. Up to eight ports per group can be
	assigned to a group.
Active Port	Shows the port that is currently forwarding packets.

After setting the previous parameters, click Apply to allow your changes to be implemented. Successfully created trunk groups will be show in the Current Trunking Group Entries table.

IGMP Snooping

Internet Group Management Protocol (IGMP) snooping allows the Switch to recognize IGMP queries and reports sent between network stations or devices and an IGMP host. When enabled for IGMP snooping, the Switch can open or close a port to a specific device based on IGMP messages passing through the Switch.

In order to use IGMP Snooping it must first be enabled for the entire Switch on the Switch Information (Advanced Settings) window (Configuration > Advanced Settings). You may then fine-tune the settings for each VLAN by clicking the IGMP Snooping link in the Configuration folder. When enabled for IGMP snooping, the Switch can open or close a port to a specific multicast group member based on IGMP messages sent from the device to the IGMP host or vice versa. The Switch monitors IGMP messages and discontinues forwarding multicast packets when there are no longer hosts requesting that they continue.

IGMP Snooping

Use the Current IGMP Snooping Group Entries window to view IGMP Snooping settings. To modify the settings, click the Modify button of the VLAN ID you want to change.

Figure 7- 9. Current IGMP Snooping Group Entries window

Clicking the Modify button will open the IGMP Snooping Settings window, shown below:

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