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DGS-1520 Series Gigabit Ethernet Smart Managed Switch Web UI Reference Guide
179
Parameter Description
Action Select Add to add a new entry based in the information entered.
Select Delete to delete an entry based in the information entered.
Type Select the type option here. Options to choose from are None, Shutdown, and
Drop.
Tunneled Protocol Select the tunneled protocol option here. Options to choose from are GVRP, STP,
Protocol MAC, and All.
Protocol MAC After selecting the Protocol MAC option as the Tunneled Protocol, the following
option will be available. Select the protocol MAC option here. Options to choose
from are 01-00-0C-CC-CC-CC and 01-00-0C-CC-CC-CD.
Threshold After selecting the Shutdown or Drop option in the Type field, the following
parameter will be available. Enter the threshold value here. This value must be
between 1 and 4096.
Click the Apply button to accept the changes made.
Click the Clear All button to clear all the counter information.
Click the Clear button to clear all the counter information of the specific entry.
L2 Multicast Control
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.
IGMP Snooping Settings
In order to use IGMP Snooping it must first be enabled for the entire Switch under IGMP Global Settings at the top of
the window. You may then fine-tune the settings for each VLAN by clicking the corresponding Edit button. 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.
To view the following window, click L2 Features > L2 Multicast Control > IGMP Snooping > IGMP Snooping
Settings, as shown below:
Figure 5-72 IGMP Snooping Settings Window
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