H3C s3100 series Command Manual page 424

interval: Interval to send Accounting-On messages (in seconds), ranging from 1 to 30 and defaulting to
3.
Description
Use the accounting-on enable command to enable the user re-authentication at restart function.
Use the undo accounting-on enable command to disable the user re-authentication at restart function
and restore the default interval and maximum number of attempts to send Accounting-On messages.
Use the undo accounting-on send command to restore the default maximum number of attempts to
send Accounting-On messages.
Use the undo accounting-on interval command to restore the default interval to send Accounting-On
messages.
By default, the user re-authentication at restart function is disabled.
The purpose of this function is to solve this problem: users cannot re-log into the switch after the switch
restarts because they are regarded as already online. After this function is enabled, every time the
switch restarts, it sends an Accounting-On message to the RADIUS server to tell the server that it has
restarted and ask the server to log out its users. The following gives the operations after the switch
restarts:
1) The switch generates an Accounting-On message, which mainly contains the following information:
NAS-ID, NAS-IP-address (source IP address), and session ID. You can configure the
NAS-IP-address argument manually by using the nas-ip command. When configuring the
NAS-IP-address argument, be sure to specify an appropriate valid IP address. If you do not
configure the NAS-IP-address argument, the switch automatically uses the IP address of a VLAN
interface as the NAS-IP-address.
2) The switch sends the Accounting-On message to the CAMS at regular intervals.
3) Once the CAMS receives the Accounting-On message, it sends a response to the switch. At the
same time it finds and deletes the original online information of the users who were accessing the
network through the switch before the restart according to the information (NAS-ID,
NAS-IP-address and session ID) contained in the message, and ends the accounting of the users
based on the last accounting update message.
4) Once the switch receives the response from the CAMS, it stops sending Accounting-On messages.
5) If the switch does not receive any response from the CAMS after it has tried the configured
maximum number of times to send the Accounting-On message, it will not send the Accounting-On
message any more.
After configuring the accounting-on enable command, you need to execute the save command
so that the command can take effect when the switch restarts.
This function requires the cooperation of the H3C CAMS system.
Related commands: nas-ip.
Examples
# Enable the user re-authentication at restart function for the RADIUS scheme named radius1.
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