Switch Features 73
Guest VLAN
The Guest VLAN feature allows a switch to provide a distinguished service to
unauthenticated users. This feature provides a mechanism to allow visitors
and contractors to have network access to reach external network with no
ability to browse information on the internal LAN.
For information about configuring the Guest VLAN see "Configuring Port
and System Security" on page 469.
Double VLANs
The Double VLAN feature (IEEE 802.1QinQ) allows the use of a second tag
on network traffic. The additional tag helps differentiate between customers
in the Metropolitan Area Networks (MAN) while preserving individual
customer’s VLAN identification when they enter their own 802.1Q domain.
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