Configuration Guide Configuring SCC
On the downlink ports of the core switch (switch A in this example) that connect to the teachers' living area and the
students' living area, both dot1x authentication and Web authentication are enabled, so that users can freely select
either authentication mode for Internet access.
Any special department (such as the headmaster's office in this example) can be allocated to a particular VLAN, and
this VLAN can be configured as an authentication-exemption VLAN so that users in this department can access the
Internet without authentication.
12.3 Basic Concepts
User Online-Status Detection
For a chargeable user, accounting starts immediately after the user passes the authentication and gets online. The
accounting process does not end until the user actively gets offline. Some users, however, forget to get offline when leaving
their PCs, or cannot get offline because of terminal problems. Then the users suffer certain economical losses as the
accounting process continues. To more precisely determine whether a user is really online, we can preset a traffic value, so
that the user is considered as not accessing the Internet and therefore directly brought offline when the user's traffic is lower
than the preset value in a period of time or there is not traffic of the user at all in a period of time.
Features
User Online-Status
Detection
You can specify whether to detect the traffic of online users, so that a user is forced offline when the
traffic of the user is lower than a preset value in a period of time.
12.3.1 User Online-Status Detection
After a user accesses the Internet, the user may forget to get offline or cannot actively get offline due to terminal faults. In this
case, the user will keep being charged and therefore will suffer a certain economical loss. To protect the benefits of users on
the Internet, the device provides a function to detect whether the users are really online. If the device considers that a user is
not online, the device actively disconnects the user.
Working Principle
A specific detection interval is preset on the device. If a user's traffic is lower than a certain value in this interval, the device
considers that the user is not using the network and therefore directly disconnects the user.
The user online-status detection function applies to only users who get online through dot1x or Web authentication.
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