> # Feature History for RADIUS, TACACS+, and LDAP

> Table 30-3 lists the release history for this feature. Only features that were introduced or modified in Cisco NX-OS Release 5.x or a later release appear in the table.

> Table 30-3 Feature History for RADIUS, TACACS+, and LDAP
> Feature Name | Releases | Feature Information
> --- | --- | ---
> Configuring LDAP | 5.2 | Added LDAP server and server groups configuration.
> Switch AAA Functionalities | 5.0(1a) | Added configuring fallback mechanism for authentication, configuring AAA server monitoring parameters globally.
> Configuring TACACS+ Server Monitoring Parameters | 5.0(1a) | Added CHAP authentication.
> OTP Authentication | 5.0(1a) | Added one-time password support
> Merge Guidelines for RADIUS and TACACS+ Configurations | 5.0(1a) | TACACS test parameters have to be distributed via CFS; a note has been changed.
> AAA Service Configuration Options | 5.0(1a) | Note has been changed.

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