HP 5120 SI Series Security Configuration Manual page 80

2. On a port that performs MAC-based access control
Authentication status
A user fails 802.1X
authentication
A user in the Auth-Fail VLAN
fails 802.1X re-authentication
A user in the Auth-Fail VLAN
passes 802.1X authentication
NOTE:
To perform the 802.1X Auth-Fail VLAN function on a port that performs MAC-based access control, you
•
must ensure that the port is a hybrid port, and enable MAC-based VLAN on the port.
• The network device assigns a hybrid port to an 802.1X Auth-Fail VLAN as an untagged member.
For more information about VLAN configuration and MAC-based VLAN, see the
•
Switching Configuration Guide.
Critical VLAN
You configure an 802.1X critical VLAN on a port to accommodate 802.1X users that fail authentication
because none of the RADIUS authentication servers in their ISP domain is reachable (active). Users in the
critical VLAN can access a limit set of network resources depending on your configuration.
The critical VLAN feature takes effect when 802.1X authentication is performed only through RADIUS
servers. If an 802.1X user fails local authentication after RADIUS authentication, the user is not assigned
to the critical VLAN. For more information about RADIUS configuration, see the chapter "AAA
configuration."
The way that the network access device handles VLANs on an 802.1X-enabled port differs by 802.1X
access control mode.
1. On a port that performs port-based access control
Authentication status
A user that has not been
assigned to any VLAN fails
802.1X authentication
because all the RADIUS
servers are unreachable.
A user in the 802.1X critical
VLAN fails authentication
because all the RADIUS
servers are unreachable.
A user in the 802.1X critical
VLAN fails authentication for
any other reason than server
unreachable.
VLAN manipulation
Re-maps the MAC address of the user to the Auth-Fail VLAN. The user can
access only resources in the Auth-Fail VLAN.
The user is still in the Auth-Fail VLAN.
Re-maps the MAC address of the user to the server-assigned VLAN.
If the authentication server assigns no VLAN, re-maps the MAC address of the
user to the initial default VLAN on the port.
VLAN manipulation
Assigns the critical VLAN to the port as the PVID. The 802.1X user and all
subsequent 802.1X users on this port can access only resources in the critical
VLAN.
The critical VLAN is still the PVID of the port, and all 802.1X users on this port
are in this VLAN.
If an Auth-Fail VLAN has been configured, the PVID of the port changes to
Auth-Fail VLAN ID, and all 802.1X users on this port are moved to the
Auth-Fail VLAN.
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Layer 2—LAN