DES-3028 DES-3028P DES-3052 DES-3052P Layer 2 Fast Ethernet Managed Switch
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 (see Advanced Settings). You may then fine-tune
the settings for each VLAN using the IGMP Snooping link in the L2 Features 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. Use the IGMP Snooping window to view IGMP Snooping status. To modify settings, click
the Modify button for the VLAN Name entry you want to change.
Use the IGMP Snooping window to view IGMP Snooping settings. To modify the settings, click the Modify button of the VLAN
ID to change.
Figure 7- 12. IGMP Snooping window
Clicking the Modify button will open the IGMP Snooping Settings menu, shown below:
Figure 7- 13. IGMP Snooping Settings window
The following parameters may be viewed or modified:
Parameter Description
VLAN ID
This is the VLAN ID that, along with the VLAN Name, identifies the VLAN for which to
modify the IGMP Snooping Settings.
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