user manual

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Cisco Aironet 1200 Series Access Point Software Configuration Guide
OL-2159-05
Chapter 6 Configuring Proxy Mobile IP
Configuring Proxy Mobile IP
Registration Requests Denied by HA
The number of times the home agent rejected registration requests.
Gratuitious ARPs sent
The number of times the access point sent gratuitious Address Resolution Protocol messages (ARPs).
Gratuitious ARPs are sent by the home agent on behalf of a roaming mobile node to update the ARP
caches on the local hosts. When the mobile node returns to its home network, the home access point
sends gratuitious ARPs (on behalf of the mobile node) to notify the network of the mobile node’s MAC
and IP address.
View Subnet Map Table
Selecting the View Subnet Map Table link takes you to the Subnet Map Table page (Figure 6-10). The
subnet map table contains a list of home agent IP addresses and their associated subnet masks.
Two buttons are available on this page that are not shown on Figure 6-10:
• Clear—removes entries from the table that are no longer valid
• Refresh—validates and renews entries on the table
Figure 6-10 Subnet Map Table Page
Settings on the Subnet Map Table Page
HA Address
This column lists the IP addresses of the home agents.
Subnet Mask
This column lists the subnet mask addresses for the corresponding home agents.
Configuring Proxy Mobile IP
Proxy Mobile IP functions as a proxy on behalf of roaming clients that do not implement a Mobile IP
software stack. In a Mobile IP environment, the access point uses the services of a home agent and a
foreign agent to allow valid mobile nodes to access a working Mobile IP network on a wired LAN. A
working Mobile IP network assumes the following:
• At least one router in the network functions as a home agent where mobile clients will be based.
• At least one router in the network functions as a foreign agent, to which mobile clients will roam.