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RADIUS Overview

308640-15.1 Rev 00

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Configuring Vendor-Specific Attributes (VSAs) for Authentication

To authenticate a remote caller, the RADIUS client must identify the router

placing the call. Identify the remote caller by configuring the caller’s Challenge

Handshake Authentication Protocol (CHAP) or Password Authentication Protocol

(PAP) name and secret, so that it maps the local circuits to the name of the remote

caller.

• In slots not configured with RADIUS, identify the remote caller by

configuring the router’s caller resolution table. (For information about caller

resolution tables, see Configuring Dial Services.)

• In slots configured with RADIUS and dial circuits, configure the

vendor-specific attributes (VSAs) on the RADIUS server. The required VSA

is Bay-Local-IP-Address, which specifies the IP address of the local port.

This VSA must match the IP address of the interface receiving the call.

When a call comes in that needs authentication, the RADIUS client first checks

the router’s caller resolution table for an entry that identifies the caller.

• If the caller is authorized, the local router maps the caller to a local circuit,

and then activates that circuit.

• If that fails, and RADIUS is configured, the client sends the RADIUS server a

request for authentication.

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. You will need, however, 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.

Note:

Do not configure a caller resolution table if you plan to use

vendor-specific attributes.

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Avaya Configuring RADIUS Manual de usuario Pagina 25