Ethernet VLAN Tagging
To pass traffic between the different VLANs on your switched network, Ethernet packets can
be tagged with a VLAN identifier that indicates the VLAN to which the traffic belongs.
Ethernet tagging enables you to pass traffic for different VLANs across the same Layer 2
interface. The following sections explain how to use Ethernet VLAN tagging with your Cisco
Security Appliance.