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RADIUS Overview

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Using RADIUS with a Dial Service

To use RADIUS accounting on the router, you must configure at least one of the

three Nortel Networks dial services: dial-on-demand, dial backup, or

bandwidth-on-demand. The dial service enables the router to activate a dial-up

connection when it receives an incoming call. For information about dial services,

refer to Configuring Dial Services.

Using RADIUS with Demand Circuit Groups (Site Manager only)

When configuring a RADIUS client using Site Manager, Site Manager

automatically configures a demand circuit group. However, you will need to

configure a protocol for the demand circuit group. See “Select a Protocol for

RADIUS Authentication” on page 2-7.

To identify the remote user to the RADIUS server, the remote user uses the PPP

CHAP or PAP. The client includes the remote user’s CHAP name and secret or

PAP ID and password in the access challenge to the server. You cannot use VSAs

with demand circuit groups.

Using RADIUS-Compatible Servers with the RADIUS Client

The Nortel Networks RADIUS client can communicate with any

RADIUS-compatible server. You must configure the server’s IP address so that the

client can communicate with the server.

To ensure that a server is always available, you can configure one primary server

and multiple alternate servers. The client tries to connect to the primary server

first. If the primary server does not respond after a certain number of attempts, the

client sends the authentication or accounting request to the alternate server. Once

the primary server recovers, the client resumes communication with the primary

server.

Accepting Remote Users’ IP Addresses

The client accepts the IP address of a remote user only if the remote user is a PC,

not another router. The client does not support any other RADIUS extensions.

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Avaya Configuring RADIUS Manual de usuario Pagina 27