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ccna 200-301 todd lammle pdf download.Multiple keywords can be used to specify methods. To initiate local authentication using a pre-configured local database, use the keyword local or local-caseo The difference between these two options is that local accepts usernames case-insensitively, while local-case is case-sensitive. To specify that users can authenticate using a privileged mode password, use the enable key3.2 Local AAA Authentication 63word. To ensure that authentication succeeds even when all methods return errors, specify none as the last method used. For security reasons, use the none keyword only when testing AAA configurations. Never use the none keyword in an actual running network. For example, the enable method can be configured as a fallback mechanism to prevent forgetting the username and password.aaa authentication loginTELNET-ACCESSlocal enableThis example creates an AAA authentication list called TELNET-ACCESS, which requires the user to first attempt to authenticate using the router's local user database. If the attempt returns an error, such as a local user database has not been configured, the user can attempt to use privileged mode password authentication. This command will only work if the TELNET-ACCESS authentication method is specifically referenced on a specific line (such as a virtual terminal line).A minimum of one method and a maximum of four methods can be specified in a method list. When a user attempts to log in, the first listed method is used. The Cisco [OS software attempts to authenticate using the next listed method only if the previous method does not respond or an error occurs. If the authentication method denies the user access, the authentication process stops and no further authentication methods are used.3.2.1.3 Default methods and named methodsThe defined list of authentication methods must be applied to a specific interface or line device. To ensure flexibility, different method lists can be applied to different contact and line devices. For example, an administrator can apply one login method to Telnet and then another to the line console. To enable a specific list name, use the aaa loginauthentication list-name command in line configuration mode.Optionally, you can also configure a . A default list name. When AAA is first enabled, the default method list named "default" is automatically applied to all interfaces and line devices, but it does not define an authentication method. To assign multiple authentication methods to the default list, use the command aaa authentication logindefault methodi... [method2]oThe authentication methods in the default method list are used by default on all lines unless a custom authentication method list is created. If a custom method list is applied on an interface or line, the method will override the interface's default method list. If the default list is not set and no other list exists, only the local user database is checked. This has the same effect as the command aaaauthenticationlogindefaultiocal. On the console, if the default method list is not set, login is successful directly, without any authentication checks.