Cisco ASR 5000 Series - Page 180

ASN Gateway Overview
▀ ASN Call Procedure Flows
▄ Cisco ASR 5000 Series Product Overview
OL-22938-02
Figure 47. Network Triggered Network Exit Call Flow
ASN BS
ASN-GW/FA/
Authenticator
MS/SS
DATA
CSN/PDN/
Internet
2
4
CSN HA
H-AAA
Server
3
7
8
9
10
11
5
6
1
Table 32. Network Triggered Network Exit Call Flow Description
Step
Description
1
Network entities, such as AAA Server, ASN Gateway FA/HA, trigger Session Release Trigger to ASN BS. This can be
from H-AAA ServerAnchor ASN Gateway/FA/HAServing ASN BS, etc.
2
ASN BS sends DREG_CMD message to MS, including Action Code=0x00 to indicate MS existing network.
3
IP session for DHCP/MIP release starts between MS and network entities.
4
MS sends DREG_REQ to ASN BS with De-Registration_Request_Code=0x02.
5
ASN BS sends Path_Dereg_Req message to ASN Gateway.
6
ASN Gateway/FA and HA starts MIP release procedure.