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When the mobile client logs into the Foreign Agent with the password ipx-unit, the
Foreign Agent uses RADIUS to authenticate the mobile client. It then looks for a profile with
an IP address that matches the Ascend-Home-Agent-IP-Addr value, so that it can bring up an
IP connection to the Home Agent.
Configuring a Home Agent
To configure an ATMP Home Agent, you must set parameters in the ATMP profile, verify that
the Home Agent can communicate across an IP link with the Foreign agent, and configure the
connection to the home network.
The link to the Foreign agent can be any kind of connection (dial-up, nailed, or Frame Relay,
for example.) or an Ethernet link, and it can be a local network or a remote network, provided
the two units communicate through an IP network.
Because the Home Agent does not establish a WAN connection on the basis of receiving
tunneled data, the link to the home network cannot be a regular switched dial-up connection,
but can be a nailed connection, a switched incoming connection from the home network, or a
routed connection.
Configuring a Home Agent in router mode
When the ATMP tunnel has been established between the Home Agent and Foreign Agent, the
Home Agent in router mode receives IP packets through the tunnel, removes the GRE
encapsulation, and passes the packets to its bridge/router software. In its routing table, the
Home Agent adds a host route to the mobile client.
Figure 11-3. Home Agent routing to the home network
mobile client
mobile client
The MAX requires settings for the IPX routing parameters in the Ethernet profile only if the
MAX is routing IPX. Following are the parameters (shown with sample settings) used for
configuring a Home Agent in router mode:
Ethernet
MAX 6000/3000 Network Configuration Guide
Ascend-Primary-Home-Agent=10.1.2.3,
Ascend-Home-Agent-Password="private"
WAN
mobile client
RADIUS
Mod Config
IPX Routing=Yes
Ether options...
Setting Up Virtual Private Networks
MAX
Internet
Foreign
Agent
ATMP Tunnel
Configuring ATMP tunnels
home
network
MAX
Home
Agent
11-11
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