Cisco ASR 5000 series Product Overview page 270

CDMA2000 Wireless Data Services
▀ Understanding Simple IP and Mobile IP
Figure 76. Mobile IP Protocol Usage
As depicted in the figure above, PPP is used to establish a communications session between the MN and the FA. Once a
PPP session is established, the MN can communicate with the HA, using the FA as a mediator or broker. Data transport
between the FA and HA use tunneled IP, either IP-in-IP or GRE tunneling. Communication between the HA and End
Host can be achieved using the Internet or a private IP network and can use any IP protocol.
The following figure provides a high-level view of the steps required to make a Mobile IP call that is initiated by the
MN to a HA and table that follows, explains each step in detail. Users should keep in mind that steps in the call flow
related to the Radio Access Node (RAN) functions are intended to show a high-level overview of radio communications
iterations, and as such are outside the scope of packet-based communications presented here.
▄ Cisco ASR 5000 Series Product Overview
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