▀ Enhanced Features and Functionality
Figure 7.
Table 2. DNS Snooping Call Flow Descriptions
Step
Description
No.
1
UE requests the system for registration.
2
System processes UE-related information with ECS subsystem.
3
System sends AAA Access Request to AAA server for UE.
4
The AAA server processes the AAA Access Request from the ECS to create the session, and the Policy Manager in AAA
server uses subscriber identification parameters including NAI (username@domain), Calling Station ID (IMSI, MSID),
and Framed IP Address (HoA) as the basis for subscriber lookup.
▄ Cisco ASR 5x00 Enhanced Charging Services Administration Guide
40
DNS Snooping Call Flow
Enhanced Charging Service Overview