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device receives a packet from the service provider network, this device will find the path for the packet
by searching the MAC address table of the VLAN corresponding to the outer tag and unicast the packet.
Thus, packet broadcast is reduced in selective QinQ applications.
Likewise, the entries in the MAC address table of the outer VLAN can also be replicated to that of the
default VLAN on a port, through which the outbound port to the service provider network can be
determined through the MAC address table of the default VLAN and user packets destined for the
service provider can be unicast.
Selective QinQ Configuration
Selective QinQ Configuration Task List
Complete the following tasks to configure selective QinQ:
Task Remarks
Enabling the Selective QinQ Feature for a Port Required
Enabling the Inter-VLAN MAC Address
Replicating Feature
Optional
If XRN Fabric has been enabled on a device, you cannot enable the VLAN-VPN feature and the
selective QinQ feature on any port of the device.
Enabling the Selective QinQ Feature for a Port
The following configurations are required for the selective QinQ feature:
z Enabling the VLAN-VPN feature on the current port
z Configuring the current port to permit packets of specific VLANs (the VLANs whose tags are to be
used as the outer VLAN tags are required)
Follow these steps to enable the selective QinQ feature:
To do... Use the command... Remarks
Enter system view
system-view
—
Enter Ethernet port view
interface interface-type
interface-number
—
Configure the outer VLAN tag
and enter QinQ view
vlan-vpn vid vlan-id
Required
Configure to add outer VLAN
tags to the packets with the
specific inner VLAN tags
raw-vlan-id inbound
vlan-id-list
Required
By default, the feature of
adding an outer VLAN tag to
the packets with the specific
inner VLAN tags is disabled.