This section explains how authentication, authorization, and accounting services verify users, control task permissions, and record user or system activity on the router.
Authentication, authorization, and accounting (AAA) is a security service framework that
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verifies the identity of a user or principal,
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verifies that an authenticated user or principal has permission to perform a specific task, and
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logs sessions and records user-generated or system-generated actions for audit trails.
AAA is part of the software base package and is available by default.
Login authentication command
To configure AAA authentication at login, use the aaa authentication login command in global configuration mode.