Cisco 300 Series Cli Manual page 264

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Syntax
aaa accounting dot1x
no aaa accounting dot1x
Parameters
N/A
Default Configuration
Disabled
Command Mode
Global Configuration mode
User Guidelines
This command enables the recording of 802.1x sessions.
If accounting is activated, the device sends a "start"/"stop" messages to a Radius
server when a user logs in / logs out to the network, respectively.
The device uses the configured priorities of the available Radius servers in order
to select the Radius server.
If a new supplicant replaces an old supplicant (even if the port state remains
authorized), the software sends a "stop" message for the old supplicant and a
"start" message for the new supplicant.
In multiple sessions mode (dot1x multiple-hosts authentication), the software
sends "start"/"stop" messages for each authenticated supplicant.
In multiple hosts mode (dot1x multiple-hosts), the software sends "start"/"stop"
messages only for the supplicant that has been authenticated.
The software does not send "start"/"stop" messages if the port is
force-authorized.
The software does not send "start"/"stop" messages for hosts that are sending
traffic on the guest VLAN or on the unauthenticated VLANs.
The following table describes the supported Radius accounting Attributes Values
and when they are sent by the switch.
Name
User-Name (1)
Authentication, Authorization and Accounting (AAA) Commands
start-stop group radius
start-stop group radius
Start Stop Description
Yes Yes Supplicant's identity.
78-21075-01 Command Line Interface Reference Guide