Cisco ASR 5000 Series Administration Manual page 123

Mobile IP Configuration Examples
6. The MS sends a Mobile IP Registration request to the GGSN/FA. This message includes either the MS‟s static
home address or it can request a temporary address by sending 0.0.0.0 as its home address. Additionally, the
request must always include the Network Access Identifier (NAI) in a Mobile-Node-NAI Extension.
7. The FA forwards the registration request from the MS to the HA while the MS‟s home address or NAI and TEID
are stored by the GGSN. In response the HA sends a registration response to the FA containing the address
assigned to the MS.
8. The FA extracts the home address assigned to the MS by the HA from the response and the GGSN updates the
associated PDP context. The FA then forwards it to the MS (identified by either the home address or the NAI
and TEID).
9. The GGSN issues a PDP context modification procedure to the SGSN in order to update the PDP address for the
MS.
10. The MS sends/receives data to/from the packet data network over the GGSN‟s PDN interface.
11. Upon termination of the subscriber session, the GGSN sends GGSN charging detail records to the CGF using
GTPP over the Ga interface.
OL-22944-02
Example 1: Mobile IP Support Using the System as a GGSN/FA ▀
Cisco ASR 5000 Series Gateway GPRS Support Node Administration Guide ▄