1 CLI CONFIGURATIONIntroduction to the CLI A command line interface (CLI) is a user interface to interact with a switch.Through the CLI on a switch, you can enter commands to configure the switchand check output information to verify the configuration. Each Switch 4210provides an easy-to-use CLI and a set of configuration commands for configuringand managing your switch.The CLI on the Switch 4210 Family provides the following features:■ Hierarchical command protection: You can control the commands thatspecific users can execute to prevent unauthorized users from configuring theswitch.■ Online help: Users can gain online help at any time by entering a questionmark (?) at the command line prompt.■ Debugging: Detailed debugging information is provided to help diagnose andlocate network problems.■ Command history function: This features enables users to check mostrecently executed commands and makes it easier to execute those commandsagain.■ Partial matching of commands: The system allows you to enter partiallymatching text to search for commands. This allows you to execute a commandby entering partially-spelled command keywords as long as the system canuniquely identify the keywords entered.Command Hierarchy The Switch 4210 uses hierarchical command protection for command lines, toprevent users with fewer access rights from using higher-level commands tochange the switch’s configuration. Based on user privilege, commands areclassified in four levels:■ Visitor level (level 0): Commands at this level are mainly used to diagnosethe network, and cannot be saved in a configuration file. For example, ping,tracert, and telnet are level 0 commands.■ Monitor level (level 1): Commands at this level are mainly used to maintainthe system and diagnose service faults, They cannot be saved in a configurationfile. Such commands include debugging and terminal.■ System level (level 2): Commands at this level are mainly used to configureservices and include routing and network layer commands. These commandscan be used to provide network services directly.■ Manage level (level 3): Commands at this level are associated with the basicoperation and support modules of the system. These commands provide
