Cisco ASR 5000 Series - Page 207

ASN Gateway Overview
CSN Procedure Flows ▀
Cisco ASR 5000 Series Product Overview ▄
OL-22938-02
Figure 61. PMIP4 Connection Setup Call Flow
ASN GW/PMIP/ FA/
DHCP Proxy
MS/SS
3
5
2
6
7
8
CSN HA
4
1
9
Table 45. PMIP4 Connection Setup Call Flow Description
Step
Description
1
Initial network entry completed as described in ASN Procedures.
2
MS sends DHCP DISCOVER message to DHCP Proxy (co-located with ASN Gateway) to discover a DHCP server for IP
host configuration.
3
Upon receiving the DHCP DISCOVER message, the DHCP Proxy in the NAS triggers the PMIP4 client to initiate 8 the
Mobile IPv4 Registration procedure.The PMIP4 client uses the HoA information and constructs a Mobile IPv4 Registration
Request message and sends the Mobile IPv4 Registration Request to the FA address. The FA forwards the registration
request to the CSN HA.