DGS-3130 Series Layer 3 Stackable Managed Switch Web UI Reference Guide 
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To view the following window, click L2 Features > L2 Protocol Tunnel, as shown below: 
 
Figure 5-613 L2 Protocol Tunnel (L2 Protocol Tunnel Global Setting) Window 
 
The fields that can be configured are described below: 
Parameter  Description 
CoS for Encapsulated 
Packets 
Select the CoS value for encapsulated packets here. This value is between 0 
and 7. Select the Default option to use the default value. 
Drop Threshold  Enter the drop threshold value here. This value must be between 100 and 
20000. By default, this value is 0. The tunneling of the Layer 2 protocol packets 
will consume CPU processing power in encapsulating, decapsulating, and 
forwarding of the packet. Use this option to restrict the CPU processing 
bandwidth consumed by specifying a threshold on the number of all Layer 2 
protocol packets that can be processed by the system. When the maximum 
number of packets is exceeded, the excessive protocol packets are dropped. 
Select the Default option to use the default value. 
Action 
Select the action that will be taken here. Options to choose from are Add and 
Delete. This is used to add or delete an L2PT tunneling multicast address to or 
from the specified protocol. 
Tunneled Protocol 
Select the tunneled protocol here. Options to choose from are: 
• GVRP - Specifies that GVRP packets will be tunneled to the configured 
address. 
• STP - Specifies that STP packets will be tunneled to the configured address. 
• MAC - Specifies that protocol packets with the specified destination address 
will be tunneled to the configured address. 
• All - Specifies that all packets will be tunneled to the configured address. 
Protocol MAC 
After selecting the MAC option as the Tunneled Protocol, select the 
destination address that will be tunneled to the configured address here. 
Options to choose from are 01-00-0C-CC-CC-CC and 01-00-0C-CC-CC-CD. 
Protocol MAC 
Enter the MAC address which the specified protocol will be tunneled to here. 
This MAC address should not be an address reserved or used by other 
Click the Apply button to accept the changes made.