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Cisco Prime Network 4.0 User Guide
OL-29343-01
Chapter 25 Monitoring Mobile Technologies
LTE Networks
Monitoring the Foreign Agent (FA)
A Foreign Agent (FA) is basically a router on a mobile node’s visited network that provides routing
services to the mobile node. The FA acts as a mediator between the mobile node and it’s home agent
(HA). When the mobile node moves out of its home network, the FA registers the mobile node with a
Care of Address (CoA). It also facilitates routing information to the mobile node’s home agent, which
contains the permanent address of the node.
When a node tries to communicate with a mobile node that is roaming, it sends packets to the permanent
address. The HA interacts with the FA and delivers the packets to the mobile node using the COA.
Figure 25-10 depicts the function of a foreign agent in a network and the different components that it
interacts with.
Figure 25-10 Foreign Agent Architecture
Viewing the Foreign Agent Configuration Details
To view the Foreign Agent configuration details:
Step 1 Right-click the required device in Prime Network Vision and choose Inventory.
Step 2 In the logical inventory window, choose Logical Inventory > Context > Mobile > FA. The list of
Foreign agents configured in Prime Network are displayed in the content pane.
Step 3 From the FA node, choose a FA service. The FA service details are displayed in the content pane as
shown in Figure 25-11.
Radio
Tower
Radio Access Network (RAN)
BSC/PCFMN
320489
PDSN/FA
PPP
Foreign AAA
R-P Interface
HA CN
Home AAA
Internet
or PDN
IP in IP or GRE Tunnel
IP