xStack DGS-3400 Series Fast Ethernet Switch
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
Device Information
). You may then
fine-tune the settings for each VLAN using the
IGMP Snooping Settings
link in the
Administration
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
To view the IGMP Snooping Settings window, click 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.
Figure 7- 13. Current IGMP Snooping Group Entries window
Clicking the
Modify
button will open the
IGMP Snooping Settings
window, shown below:
Figure 7- 14. IGMP Snooping Settings window
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