DES-3010F/DES-3010FL/DES-3010G/DES-3018/DES-3026 Fast Ethernet Switch Manual
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 Group Entry Table 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 Settings window to view IGMP Snooping settings. To modify the settings, click the Modify
button of the VLAN ID to change.
Figure 7- 10. Current IGMP Snooping Group Entries
Clicking the Modify button will open the IGMP Snooping Settings menu, shown below:
Figure 7- 11. IGMP Snooping Settings-Edit window
The following parameters may be viewed or modified:
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