Dell PowerConnect 8024 User Configuration Manual page 499

NOTE:
Dynamic VLAN creation applies only to authorized ports. The VLANs for
unauthorized and guest users must be configured on the switch and cannot be
dynamically created based on RADIUS-based VLAN assignment.
The commands in this example show how to configure the switch to control
VLAN assignment for the example network. This example also contains
commands to configure the uplink, or trunk, port (a port connected to a
router or the internal network), and to configure the downlink, or access,
ports (ports connected to one or more hosts). Ports 1–23 are downstream
ports. Port 24 is an uplink port. An external RADIUS server handles the
VLAN assignment.
NOTE:
The configuration to control the VLAN assignment for authorized users is
done on the external RADIUS server.
Configuring Port and System Security
499