Cisco ASR 5000 Series Administration Manual page 131

Mobile IP Configuration Examples
4. Upon successful authentication, the Source context determines which egress context to use for the subscriber
session. This process is described in the How the System Selects Contexts section located in the Understanding
the System Operation and Configuration chapter of the System Administration Guide.
For this example, the system determines that the egress context is the Destination context based on the
configuration of the Default subscriber.
5. An IP address is assigned to the subscriber‟s mobile node from an IP address pool configured in the destination
context. This IP address is used for the duration of the session and then be returned to the pool.
6. Data traffic for the subscriber session is then routed through the PDN interface in the Destination context.
7. Accounting messages for the session are sent to the AAA server over the AAA interface.
OL-22944-02
Example 2: Mobile IP Support Using the System as an HA ▀
Cisco ASR 5000 Series Gateway GPRS Support Node Administration Guide ▄