Specifications

6-3
Cisco Aironet Access Point Software Configuration Guide
OL-0657-07
Chapter 6 Configuring Proxy Mobile IP
Proxy Mobile IP
Note Guest client devices do not receive broadcast and multicast packets from their
home networks.
Components of a Proxy Mobile IP Network
Five devices participate in proxy Mobile IP:
• A visiting client device. The visiting client device is any device such as a
personal digital assistant or a laptop that can associate to a wireless access
point. It does not need any special proxy Mobile IP client software.
• An access point with proxy Mobile IP enabled. The access point proxies on
behalf of the visiting client device, performing all Mobile IP functions for the
device. The access point uses a subnet map to keep track of home agent
information. The access point also gets updates about new home agents from
the authoritative access point.
• An authoritative access point on your network supporting proxy Mobile IP.
The authoritative access point uses a subnet map to collect and distribute
home agent information stored in the subnet map to all the regular access
points for all visiting client devices.
• A home agent. The home agent is a router on the visiting client’s home
network that serves as the anchor point for communication with the access
point and the visiting client. The home agent tunnels packets from a
correspondent node on the Internet to the visiting client device.
• A foreign agent. The foreign agent is a router on your network that serves as
the point of attachment for the visiting client device when it is on your
network, delivering packets from the home agent to the visiting client.
Figure 6-1 shows the five participating devices.