Chapter 37 Configuration of 802.1X DGS-3610 Series Configuration Guide
Figure 37-10
37.2.25 Configuring On-line Client Probe
To ensure accurate charging, an on-line probe mechanism is needed to detect whether a
user is on-line within a short period. The re-authentication mechanism specified in the
standard can meet such needs, but it needs the participation of the RADIUS server. Accurate
user probe will occupy enormous resources of the device and RADIUS server. To meet the
need to implement accurate charging with fewer resources occupied, we use a new client
on-line probe mechanism. Such mechanism only needs interaction between the device and
client and occupies little network traffic, and it implements minute-level charging accuracy
(you can set the charging accuracy).
To implement on-site monitoring of the client, the client software must
support this function.
The following two timers affect the performance and accuracy of on-line probe:
Hello Interval: It is the interval at which the client sends an advertisement.
Alive Interval: Client online interval. If the device has not received the client
advertisement during this interval, it actively disconnects the client and notifies the
billing server. The interval must be greater than the Hello Interval.
In the privileged mode, you can configure the on-line probe function of the client through the
following steps:
Enter the global configuration mode.
dot1x client-probe enable
Enable the on-line probe function of the client
dot1x probe-timer interval interval
Configure the Hello Interval
dot1x probe-timer alive interval
Configure the Alive Interval of the device.
Return to the privileged mode.
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