41telnet: Supports only Telnet. This keyword is not supported in FIPS mode.Usage guidelinesBefore configuring a user interface to support SSH, set the authentication mode to scheme for the userinterface; otherwise, the protocol inbound ssh command fails. For more information, seeauthentication-mode.Examples# Enable the VTYs 0 through 4 to support only SSH. system-view[Sysname] user-interface vty 0 4[Sysname-ui-vty0-4] authentication-mode scheme[Sysname-ui-vty0-4] protocol inbound sshscreen-lengthUse screen-length to set the maximum number of lines to be displayed on a screen.Use undo screen-length to restore the default.Syntaxscreen-length screen-lengthundo screen-lengthDefaultA screen displays 24 lines at most.ViewsUser interface viewDefault command level2: System levelParametersscreen-length: Specifies the maximum number of lines to be displayed on a screen, in the range of 0 to512. The value of 0 disables pausing between screens of output.Usage guidelinesWhen screen output pauses, press the Space key to display the next screen. Not all terminals support thissetting. For example, assume you set screen-length to 40, but the terminal can display 24 lines in onescreen at most. When you press Space, the device sends 40 lines to the terminal, but the screen displaysonly lines 18 through 40. To view the first 17 lines, press the page up or page down key.To disable pausing between screens of output for the current session, use the screen-length disablecommand.Examples# Set the screen length of AUX user interface 0 to 30 lines. system-view[Sysname] user-interface aux 0[Sysname-ui-aux0] screen-length 30