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# pre-authenticate

#### Syntax

[ no ] pre-authenticate

#### Release Information

Command introduced in JunosE Release 8.1.0.

#### Description

Configures an AAA profile to support RADIUS preauthentication. During the preauthentication process, the router sends an Access-Request message to a RADIUS preauthentication server to obtain an AAA logical line identifier (LLID) for each subscriber. In response, the preauthentication server returns the LLID in the RADIUS Calling-Station-Id [31] attribute of an Access-Accept message. The no version removes preauthentication support from the AAA profile.

#### Mode

AAA Profile Configuration

#### Published: 2010-10-19

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