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August 08, 2004
IEEE 802.1Q-in-Q VLAN Tag (QinQ)
The IEEE 802.1Q-in-Q VLAN Tag is purpose to expand the VLAN space by tagging the tagged packets, thus producing a "double-tagged" frame. The expanded VLAN space allows the service provider to provide certain services, such as Internet access on specific VLANs for specific customers, and yet still allows the service provider to provide other types of services for their other customers on other VLANs.
For more information you can see the below link :
IEEE 802.1Q-in-Q VLAN Tag Termination
Posted by Mehrdad at August 8, 2004 05:07 PM