10.3.6 Account function

The Switch use the accounting functionality described below to record the results of authentication operations.

<Structure of this section>

(1) Account log

MAC-based authentication accounting logs contain information about the use of MAC-based authentication services on the Switch. You can display the log information by using the show mac-authentication logging operation command.

The following table describes the events recorded as accounting log information.

Table 10-4: Authentication results output
Event	Time	MAC address	VLAN ID	Port number	Message
Successful authentication	Time when authentication succeeded	OK	OK	OK	Authentication success
Authentication status cleared	Time when authentication status was cleared	OK	OK^#	OK^#	Authentication cleared
Failed authentication	Time when authentication failed	OK	OK^#	OK^#	Reason for failed authentication

Legend: OK: Recorded

#: Might not be output depending on the message contents.

The Switch can store a maximum of 2100 lines of MAC-based authentication accounting log information. Upon reaching this limit, the switch starts overwriting the existing accounting information in order from the oldest.

(2) Recording RADIUS Servers to Accounting Features

You can enable the accounting functionality for the RADIUS server by using the aaa accounting mac-authentication configuration command. The accounting functionality records the following information:

Authentication information. The following information is recorded when authentication is successful:

Time, MAC and VLAN ID recorded on the server*
De-authentication information. The following information is recorded when the authentication status of a terminal is cleared:

Time recorded in the server, MAC address, VLAN ID*, elapsed time from successful authentication to cancellation of authentication

#: For information about what is recorded, see the section NAS-Identifier AttributeNames Used in Tabular 10-7 RADIUS Accounting.

(3) Logging Credentials to RADIUS Servers

If you are using RADIUS authentication, the accounting functionality of the RADIUS server records the success or failure of authentication attempts. Note that the information that is recorded differs between RADIUS server implementations. For details, see the documentation for the RADIUS server deployed in your network.

(4) Logging Operations to syslog Servers

You can output the operation logs for MAC-based authentication to a syslog server. These operation logs include the MAC-based authentication accounting logs. The following figure shows the format of log output to the syslog server.

Figure 10-7 Syslog server format

You can start and stop output to syslog by using the mac-authentication logging enable and logging event-kind aut configuration commands.