3Com Switch 7750 Configuration Guide

RADIUS Configuration 531
instead of communicating with the secondary server, and at the same time
restores the primary server to the active state while keeping the state of the
secondary server unchanged.
To charge the users in real time, you should set the interval of real-time
accounting. After the setting, the switch sends the accounting information of
online users to the RADIUS server at regular intervals.
Configuring the User
Re-Authentication upon
Device Restart Function
n
The function applies to the environment where the RADIUS
authentication/accounting server is CAMS.
In an environment with a CAMS server, if the switch reboots after an exclusive user
(a user whose concurrent online number is set to 1 on the CAMS) gets
authenticated and authorized and begins being charged, the switch will give a
prompt that the user has already been online when the user re-logs in to the
network before CAMS performs online user detection, and the user cannot get
authenticated. In this case, the user can access the network again only after the
CAMS administrator manually removes the online information of the user.
The user re-authentication upon device restart function is designed to resolve the
above problem. After this function is enabled, every time the switch restarts:
1 The switch generates an Accounting-On packet, which mainly contains the
following information: NAS-ID, NAS-IP address (source IP address), and session ID.
2 The switch sends the Accounting-On packet to CAMS at regular intervals.
3 Once the CAMS receives the Accounting-On packet, it sends a response to the
switch. At the same time it finds and deletes the original online information of the
users who access the network through the switch before the restart according to
Table 416 Set the timers of RADIUS server
Operation Command Description
Enter system view system-view -
Create a RADIUS
scheme and enter
its view
radius scheme
radius-scheme-name
Required
By default, a RADIUS scheme named
“system” has already been created in
the system.
Set the response
timeout time of
RADIUS servers
timer response-timeout
seconds
Optional
By default, the response timeout
timer of RADIUS servers expires in
three seconds.
timer seconds
Set the wait time for
the primary server
to restore the active
state
timer quiet minutes Optional
By default, the primary server waits
five minutes before restoring the
active state.
Set the real-time
accounting interval
timer realtime-accounting
minutes
Optional
By default, the real-time accounting
interval is 12 minutes.