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User Manual
3-10.8 IEEE 802.1QinQ (double-tag) configuration
Service providers can use Q-in-Q to transparently pass Layer 2 VLAN traffic from a customer
site, through the service provider network, to another customer site without removing or
changing the customer VLAN tags
The double Q-in-Q tags can indicate different information, the inner tag indicates the user, the
outer tag indicates carrier provider, the Q-in-Q packet with two tags can traverse the carrier's
network and the inner tag is transmitted transparently.
Scenario:
Switch will be used for Leased Line Service.
They are already using Tag VLAN (802.1q), so they would like to add another Tag without
changing existing VLAN.
Typical Application:
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Publication date: Feb., 2013
Revision A3
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