46 CHAPTER 1: GETTING S TARTEDSetting the Screen Length If a command displays more than one screen ofinformation, you can use the following command to set how many lines to bedisplayed in a screen, so that the information can be separated in different screensand you can view it more conveniently.By default, the terminal screen length is 24 lines.screen-length 0 Disables screen display separation function.Setting the History Command Buffer SizeBy default, the size of the history command buffer is 10, that is, 10 history commandscan be saved.Managing UsersThe management of users includes the setting of user login authentication method,level of command which a user can use after logging in, level of command which auser can use after logging in from a specific user interface, and command level.Configuring the Authentication Method The following command is used forconfiguring the user login authentication method to deny the access of anunauthorized user.Perform the following configuration in User Interface View.By default, terminal authentication is not required for users logged in through theconsole port, whereas the password is required for authenticating the Modem andTelnet users when they log in.1 Perform local password authentication to the user interfaceUsing authentication-mode password command, you can perform local passwordauthentication. That is, you need use the command below to configure a loginpassword to login successfully.Table 20 Setting the Screen LengthOperation CommandSet the screen length screen-length screen_lengthRestore the default screen length undo screen-lengthTable 21 Setting the History Command Buffer SizeOperation CommandSet the history command buffer size history-command max-size valueRestore the default history command buffer size undo history-command max-sizeTable 22 Configuring the Authentication MethodOperation CommandConfigure the authentication method authentication-mode { password | scheme }Configure no authentication authentication-mode none
