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DES-3010F/DES-3010FL/DES-3010G/DES-3016/DES-3018/DES-3026 Fast Ethernet Switch Manual
97
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 IGMP snooping is enabled,
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 the IGMP Snooping status. To modify the
settings, click the Modify button for the VLAN Name entry you want to change.
To view this window click L2 Features > IGMP Snooping > IGMP Snooping
Figure 7- 12. Current IGMP Snooping Group Entries
Clicking the Modify button will open the IGMP Snooping Settings menu, shown below:
Figure 7- 13. IGMP Snooping Settings-Edit window