Cisco Cisco Packet Data Gateway (PDG) Guía Para Resolver Problemas
CDMA2000 Wireless Data Services
Understanding Simple IP and Mobile IP ▀
Cisco ASR 5000 Series Packet Data Serving Node Administration Guide ▄
OL-22939-01
Figure 6.
Mobile IP, FA and HA Tunneling/Transport Methods
How Mobile IP Works
As described earlier, Mobile IP uses three basic communications protocols; PPP, IP, and Tunneled IP in the form of IP-
in-IP or GRE tunnels. The following figure depicts where each of these protocols are used in a basic Mobile IP call.
in-IP or GRE tunnels. The following figure depicts where each of these protocols are used in a basic Mobile IP call.