D-Link DXS-3400 Emulator - Page 569
l2protocol-tunnel cos
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DXS-3400 Series Lite Layer 3 Stackable 10GbE Managed Switch CLI Reference Guide Default By default, this option is disabled. Command Mode Interface Configuration Mode. Command Default Level Level: 12. Usage Guideline Use the command to enable tunneling of the Layer 2 protocol packet. With protocol tunneling, the protocol operation information at the local site and the remote site can be exchanged through the service provider network. If the protocol type is not specified, the command enables tunneling of all types of protocol packets. Configure the Layer 2 protocol tunnel for GVRP/STP on the port whether GVRP/STP is enabled or not. However, the protocol operation of GVRP/STP will not work on the port when the corresponding Layer 2 protocol tunnel for GVRP/STP is enabled. When a Layer 2 protocol packet arrives at port which is enabled for protocol tunneling, the switch will classify the packet with the service VLAN and forward the packet to the service VLAN member ports. Generally, the packet is encapsulated and forwarded to the remote site via the trunk port. When forwarding a packet to the remote site via a trunk port, the tunneled packet will be tagged with service VLAN. The packet can also be forwarded to other ports at the local site which are enabled for protocol tunnel. Normally, protocol tunneling encapsulates the protocol packet by replacing the destination MAC address of the packet with a vendor specific multicast address. However, if the port being forwarded is Layer 2 protocol tunnel enabled, then the destination MAC address of the protocol packet will not be overwritten. At the remote site, the switch decapsulates the tunneled packet by restoring the vendor specific multicast address to the original PDU address and forward the packet to the customer network via the ports that are enabled for protocol tunnel. If the port that is enabled for the Layer 2 protocol tunnel receives encapsulated packets, then the port will enter the error-disable state. Example This example shows how to enable a tunneling protocol for the STP protocol on an interface. Switch# configure terminal Switch(config)# interface ethernet 1/0/1 Switch(config-if)# l2protocol-tunnel stp WARNING: STP doesn't run when l2 protocol tunnel is enabled for the port. Switch(config-if)# 58-3 l2protocol-tunnel cos This command is used to specify the CoS value for tunneling of the protocol packets. Use the no form of this command to revert to the default setting. l2protocol-tunnel cos COS-VALUE no l2protocol-tunnel cos 565
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