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4.4.6.2 Q-in-Q Tunnel Setting
Business customers of service providers often have specific requirements for VLAN IDs and the number of VLANs to be
supported. The VLAN ranges required by different customers in the same service-provider network might overlap, and
traffic of customers through the infrastructure might be mixed. Assigning a unique range of VLAN IDs to each customer
would restrict customer configurations and could easily exceed the VLAN limit (4096) of the IEEE 802.1Q specification.
Using the QinQ feature, service providers can use a single VLAN to support customers who have multiple VLANs.
Customer VLAN IDs are preserved, and traffic from different customers is segregated within the service-provider network,
even when they appear to be in the same VLAN. Using QinQ expands VLAN space by using a VLAN-in-VLAN hierarchy
and retagging the tagged packets. A port configured to support QinQ is called a QinQ user-port. A port configured to support
QinQ Uplink is called a QinQ uplink-port.
To configure QinQ Port
1.
Enable global QinQ
2.
Fill QinQ Tpid.
3.
Enable port QinQ fun
4.
Enable port QinQ Uplink function: select QinQ Uplink checkbox for s
Figure 4-4-11: Q-in-Q Tunnel Setting Interface Screenshot
function: select QinQ enable "Enable".
ction: select QinQ checkbox for special port.
User's Manual of WGSW-2620HP
pecial port.
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