D-Link xStack DGS-3426 User Manual - Igmp
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
94