D-Link DXS-3600 Series Cli Reference Manual page 707

DXS-3600 Series Layer 3 Managed 10Gigabit Ethernet Switch CLI Reference Guide
01-00-0c-cc-cc-cd
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)#
59-3 l2protocol-tunnel cos
This command is used to specify the CoS value for tunneling of the protocol packets. Use the no form of
the command to reset to the default setting.
l2protocol-tunnel cos COS-VALUE
(Optional) Specifies to tunnel the protocol packets with this destination
DA.
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