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DES-3500 Series Layer 2 Stackable Fast Ethernet Managed Switch User Manual
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IGMP
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 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. To view this window click, Configuration > IGMP > IGMP Snooping.
Figure 6- 14. Current IGMP Snooping Group Entries window
Clicking the Modify button will open the IGMP Snooping Settings window, shown below:
Figure 6- 15. IGMP Snooping Settings window
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