Reference Guide

92 | 802.1X
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Dynamic VLAN Assignment with Port Authentication
FTOS supports dynamic VLAN assignment when using 802.1X. The basis for VLAN assignment is
RADIUS attribute 81, Tunnel-Private-Group-ID. Dynamic VLAN assignment uses the standard dot1x
procedure: 1) the host sends a dot1x packet to the Force10 system, 2) the system forwards a RADIUS
REQEST packet containing the host MAC address and ingress port number, and 3) the RADIUS server
authenticates the request and returns a RADIUS ACCEPT message with the VLAN assignment using
Tunnel-Private-Group-ID.
In Figure 6-11 shows the configuration on the Force10 system before connecting the end-user device in
black and blue text, and after connecting the device in red text. The blue text corresponds to the preceding
numbered steps on dynamic VLAN assignment with 802.1X.
Step Task
1 Configure 8021.x globally and at interface level (see Enabling 802.1X) along with relevant RADIUS server
configurations (Figure 6-11)
2 Make the interface a switchport so that it can be assigned to a VLAN.
3 Create the VLAN to which the interface will be assigned.
4 Connect the supplicant to the port configured for 802.1X.
5 Verify that the port has been authorized and placed in the desired VLAN (Figure 6-11, red text).