Bpdu-Tunnel Tunnel-Dmac - 3Com 5500-EI PWR Reference Manual

original destination MAC address of the packet before sending it. As a result, the packet will not be
recognized as a protocol packet by other devices in the operator network during transmission. In this
way, transparent transmission is implemented.
You can use the bpdu-tunnel tunnel-dmac command to change the destination MAC addresses of
protocol packets to a specified multicast MAC address.
If this command is enabled on a port for a specific protocol, the specific protocol cannot be enabled
on the port. For example, if you have configured the bpdu-tunnel lacp command, the lacp enable
command cannot be enabled on the port.
The commands configured for service provider's devices at both ends of a BPDU tunnel must be
consistent. Otherwise, BPDU packets of the customer network cannot be transparently transmitted
properly.
If XRN fabric is enabled on one port of a device, the BPDU tunnel feature cannot be enabled on any
port of the device.
Examples
# Enable BPDU tunnel for packets of LACP.
<Sysname> system-view
System View: return to User View with Ctrl+Z.
[Sysname] interface Ethernet 1/0/1
[Sysname-Ethernet1/0/1] bpdu-tunnel lacp

bpdu-tunnel tunnel-dmac

Syntax
bpdu-tunnel tunnel-dmac mac-address
undo bpdu-tunnel tunnel-dmac
View
System view
Parameters
mac-address: Destination MAC address to be assigned to the protocol packets transmitted along a
BPDU tunnel. This argument must be a multicast MAC address.
Description
Use the bpdu-tunnel tunnel-dmac command to configure the destination MAC address for protocol
packets transmitted along a BPDU tunnel.
Use the undo bpdu-tunnel tunnel-dmac command to restore the default destination MAC address.
By default, the destination MAC address for protocol packets transmitted along a BPDU tunnel is
010f-e200-0003.
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