Cisco Cisco IOS Software Release 12.2(27)SBC

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The RADIUS-Based Lawful Intercept feature introduces a new method of conducting lawful 
interception of traffic data. Intercept requests are sent from the RADIUS server to the network access 
server (NAS) or to the Layer 2 Tunnel Protocol access concentrator (LAC) by using Access-Accept 
packets or Change of Authorization (CoA) Request packets. All data traffic going to or from a PPP or 
L2TP session is passed to a mediation device.

Previously, to intercept traffic data you had to wait for an IP address to be assigned to the session.

Your Cisco IOS software release may not support all of the features documented in this module. To reach 
links to specific feature documentation in this module and to see a list of the releases in which each feature is 
supported, use the 

.

Use Cisco Feature Navigator to find information about platform support and Cisco IOS software image 
support. Access Cisco Feature Navigator at 

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Cisco.com. If you do not have an account or have forgotten your username or password, click Cancel at 
the login dialog box and follow the instructions that appear.