D-Link DES-1228/ME, User Manual

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DES-1228/ME Layer 2 Fast Ethernet Managed Switch
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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 the 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. 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. To view this window click L2 Features > IGMP Snooping > IGMP Snooping .
Use the IGMP Snooping window to view IGMP Snooping settings. To modify the settings, click the Modify button of the VLAN
ID you wish to change.
Figure 7- 14. IGMP Snooping window
Clicking the Modify button will open the IGMP Snooping Settings menu, shown below:
Figure 7- 15. 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