Nomadix AG 5500, User Manual, Page: 289 / 338

AG 5500
Quick Reference Guide 277
Selected Detailed Descriptions
Acct-Session-ID
The Acct-Session-ID is created when the RADIUS authentication request is built. It is
transmitted in both the Access-Request and the Accounting-Request.
Session Timeout
There is currently no default session timeout that you can set in the AG 5500 Web
Management Interface (WMI). If the Radius server does not send a Session-Timeout, the AG
5500 will set the subscriber expiration time to 0, which means access forever.
Log-Off-URL
Allows for the placement of a log off URL (for example, 1.1.1.1) on an external portal page.
Idle Timeout
The WMI allows the setting of a default timeout. If the Radius server does not send an Idle-
Timeout in the Radius Access-Accept, the AG 5500 will use the default one to disconnect
subscribers. “0” means forever.
Timeout Detection
If a subscriber is sending traffic through the AG 5500, the AG 5500 will immediately detect a
Session-Timeout. However in the case of an Idle-Timeout or an inactive subscriber Session-
Timeout, the AG 5500 detects it via a clean-up function that is currently called every 2
minutes. Thus the current precision for sending the Acct-Stop is about 2 minutes.
Subscriber Session Duration
Acct-Session-Time is calculated the following way (for each transmitted/retransmitted Acct-
Stop):
Acct-Session-Time = time of last sent packet - subscriber login time.
Another attribute, Acct-Delay-Time, will take into consideration the time spent in
retransmissions.
Interim Accounting Updates
The AG 5500 parses the attribute Acct-Interim-Interval in an Access-Accept. If this attribute is
present the AG 5500 tries every [Acct-Interim-Interval] seconds to send a Radius Accounting
Interim message for the specific subscriber. If this attribute is not present or equal to 0, no
Interim message is sent.
The precision is 2 minutes. The AG 5500 will not send Interim messages more frequently than
every 2 minutes.
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