3Com 10014298 manual By default, minute is set to 12 minutes

Configuring the RADIUS Protocol 225

larger value. The following table recommends the ratio of minute value to the number of users.

Table 242 Recommended Ratio of Minute to Number of Users

Number of users	Real-time accounting interval (minute)
1 to 99	3
100 to 499	6
500 to 999	12
1000	15

By default, minute is set to 12 minutes.

Setting Maximum Times of Real-time Accounting Request

The RADIUS server usually verifies that a user is online with timeout timer. If the RADIUS server has not received the real-time accounting packet from NAS for a specified period, it stops accounting. Therefore, it may be necessary to disconnect the user at the NAS end and on the RADIUS server when some unpredictable failure exists. The Switch 7750 allows you to configure the maximum number of retries for real-time accounting requests. NAS disconnects the user if it has not received a real-time accounting response from the RADIUS server for the specified number of times.

Perform the following configurations in RADIUS server group view.

Table 243 Set Maximum Times of Real-Time Accounting Request Failing to be Responded

Operation	Command
Configure the maximum number of retries for	retry realtime-accounting
real-time accounting requests.	retry-times
Restore the maximum number of retries for	undo retry realtime-accounting
real-time accounting requests to the default
value.

The value of retry-timesis the ceiling value of T/t, where T is the period of time in which the RADIUS server connection will timeout, and t is the real-time accounting interval of NAS.

By default, the value for retry-timesis 5.

Enabling/Disabling Stop Accounting Request Buffer

Because the stop accounting request concerns the account balance, and affects the amount to charge a customer, NAS makes its best effort to send the message to the RADIUS accounting server. If the message from the Switch 7750 to RADIUS accounting server has not been responded to, the switch saves it in the local buffer and retransmits until the server responds or discards the messages. The following command can be used to enable the storage of the stop accounting message. If the stop-accounting buffer is enabled, make sure you set the maximum retransmission time.