D-Link DGS-1520 User Manual - Page 188

DGS-1520 Series Gigabit Ethernet Smart Managed Switch Web UI Reference Guide L2 Protocol Tunnel This window is used to display and configure the Layer 2 protocol tunnel settings. To view the following window, click L2 Features > L2 Protocol Tunnel and select the L2 Protocol Tunnel Global Settings tab, as shown below: Figure 5-70 L2 Protocol Tunnel (L2 Protocol Tunnel Global Setting) Window The fields that can be configured are described below: Parameter CoS for Encapsulated Packets Drop Threshold Description Select the CoS value for encapsulated packets here. This value is between 0 and 7. Select the Default option to use the default value. 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. Click the Apply button to accept the changes made. To view the following window, select the L2 Protocol Tunnel Port Setting tab, as shown below: Figure 5-71 L2 Protocol Tunnel (L2 Protocol Tunnel Port Setting) Window The fields that can be configured are described below: Parameter Unit From Port - To Port Description Select the Switch unit that will be used for this configuration here. Select the range of ports that will be used for this configuration here. 178