Cisco Systems 78-11741-02 manual Mobile IP Configuration Task List, Enabling Home Agent Services

Configuring Mobile IP

Mobile IP Configuration Task List

Because Mobile IP requires support on the host device, each mobile node must be appropriately configured for the desired Mobile IP service with client software. Please refer to the manual entries in your mobile aware IP stack vendor documentation for details.

Mobile IP Configuration Task List

To enable Mobile IP services on your network, you need to determine not only which home agents will facilitate the tunneling for selected IP address, but also where these devices or hosts will be allowed to roam. The areas, or subnets, into which the hosts will be allowed to roam will determine where foreign agent services need to be set up.

To configure Mobile IP, perform the tasks described in the following sections as related to the functions you intend to support. The tasks in the first two sections are required; the tasks in the remaining sections are optional.

•Enabling Home Agent Services (Required)

•Enabling Foreign Agent Services (Required)

•Configuring AAA in the Mobile IP Environment (Optional)

•Configuring RADIUS in the Mobile IP Environment (Optional)

•Configuring TACACS+ in the Mobile IP Environment (Optional)

•Verifying Setup (Optional)

•Monitoring and Maintaining Mobile IP (Optional)

•Shutting Down Mobile IP (Optional)

Enabling Home Agent Services

Home agent functionality is useful within an enterprise network to allow users to retain an IP address while they move their laptop PCs from their desktops into conference rooms or labs or common areas. It is especially beneficial in environments where wireless LANs are used because the tunneling of datagrams hides the movement of the host and thus allows seamless transition between base stations. To support the mobility of users beyond the bounds of the enterprise network, home agent functionality can be enabled for virtual subnets on the DMZ or periphery of the network to communicate with external foreign agents.

To enable home agent service for users having homed or virtually homed IP addresses on the router, use the following commands in global configuration mode:

	Command	Purpose
Step 1
	Router(config)# router mobile	Enables Mobile IP on the router.
Step 2
	Router(config-router)# exit	Returns to global configuration mode.
Step 3
	Router(config)# ip mobile home-agent	Enables home agent service.
Step 4
	Router(config)# ip mobile virtual-network net mask	Adds virtual network to routing table. If not using a
	[address address]	virtual network, go to step 6.
Step 5
	Router(config)# router protocol	Configures a routing protocol.
Step 6
	Router(config)# redistribute mobile	Enables redistribution of a virtual network into
		routing protocols.
		Cisco IOS IP Configuration Guide

IPC-167