3.3.4 Higher-Layer Triggered Events

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The Extensible Authentication Protocol Method for Microsoft CHAP is initialized on the EAP server when it is invoked by EAP as an authentication method. This occurs when an EAP-enabled protocol, such as RADIUS [RFC2865], invokes EAP. The EAP server proposes the use of the Extensible Authentication Protocol Method for Microsoft CHAP by sending a Challenge-Request message to the peer.<5>