HP 3600 v2 Series Security Configuration Manual page 41

NOTE:
For a type of users, the maximum number of transmission attempts multiplied by the RADIUS server
•
response timeout period must be less than the client connection timeout time and must not exceed 75
seconds. Otherwise, stop-accounting messages cannot be buffered, and the primary/secondary server
switchover cannot take place. For example, the product of the two parameters must be less than 10
seconds for voice users, and less than 30 seconds for Telnet users because the client connection timeout
period for voice users is 10 seconds and that for Telnet users is 30 seconds.
• When you configure the maximum number of RADIUS packet transmission attempts and the RADIUS
server response timeout period, be sure to take the number of secondary servers into account. If the
retransmission process takes too much time, the client connection in the access module may be timed out
while the switch is trying to find an available server.
When a number of secondary servers are configured, the client connections of access modules that have
•
a short client connection timeout period may still be timed out during initial authentication or
accounting, even if the packet transmission attempt limit and server response timeout period are
configured with small values. In this case, the next authentication or accounting attempt may succeed
because the switch has set the state of the unreachable servers to blocked and the time for finding a
reachable server is shortened.
Be sure to set the server quiet timer properly. Too short a quiet timer may result in frequent authentication
•
or accounting failures because the switch has to repeatedly attempt to communicate with an
unreachable server that is in active state.
For more information about the maximum number of RADIUS packet transmission attempts, see
•
"Setting the maximum number of RADIUS request transmission
Configuring RADIUS accounting-on
The accounting-on feature enables a switch to send accounting-on packets to the RADIUS server after it
reboots, making the server log out users who logged in through the switch before the reboot. Without this
feature, users who were online before the reboot cannot re-log in after the reboot, because the RADIUS
server considers they are already online.
If a switch sends an accounting-on packet to the RADIUS server but receives no response, it resends the
packet to the server at a particular interval for a specified number of times.
Follow these steps to configure the accounting-on feature for a RADIUS scheme:
To do...
Enter system view
Enter RADIUS scheme view
Enable accounting-on and
configure parameters
NOTE:
The accounting-on feature requires the cooperation of the iMC network management system.
Use the command...
system-view
radius scheme
radius-scheme-name
accounting-on enable
[ interval seconds | send
send-times ] *
30
attempts."
Remarks
—
—
Required
Disabled by default.
The default interval is 3 seconds and the
default number of send-times is 5.