
Configuring RADIUS
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An accounting session is the time during which the remote user communicates
with the client. The session begins when the client passes an accounting request
from the remote user to the server, with an accounting status byte set to start. The
session ends when the client sends a second request with the accounting status
byte set to stop. Multiple accounting sessions can occur simultaneously if there
are multiple dial-up connections.
The client sends accounting requests only to the server configured for accounting,
enabling you to use different servers for accounting and authentication.
If the client cannot reach the primary server after several attempts, and you
configured an alternate server, the client sends the accounting request to the
alternate server. If an accounting session starts with the primary server, and this
server goes down, the session is continued with the alternate server. Unless the
primary server recovers, the request to end the session is then sent to the alternate
server. To accurately determine billing charges, the network administrator collects
information from all accounting servers.
Using IP and IPX Unnumbered Protocols for PPP Connections
The RADIUS client supports IP and IPX unnumbered interfaces, meaning that the
circuit’s interface address is 0.0.0.0. All remote users that dial in to the same slot
on the client receive the same unnumbered protocol configuration.
The unnumbered circuit interface eliminates the need for a unique circuit
configuration for each remote user in a network. Therefore, an unnumbered circuit
interface reduces the configuration effort and the number of IP addresses that you
use for a large network. The client can activate any available circuit for an
incoming call because there is no specific address assigned to the circuit.
When you configure accounting for a router slot, Site Manager automatically
configures the dial-up circuits required for the client to accept calls from the
remote user. You are responsible for configuring only the unnumbered circuit
interfaces. If you use an FTP Telnet session, this configuration is unnecessary.
Note:
Unlike the circuit’s address, the RADIUS client’s address is a numbered
address.
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