Cisco cli

Cisco IOS is the backbone software that powers many of Cisco's network devices. For professionals working with these systems, knowing the right commands is crucial. This article provides a Cisco commands cheat sheet, outlining the most common Cisco IOS commands for configuring, securing and troubleshooting Cisco network equipment, cisco cli. It includes the list cisco cli Cisco switch commands, a Cisco router commands list and Cisco network commands.

This user interface allows you to directly and simply execute Cisco IOS commands, whether using a router console or terminal, or using remote access methods. Topics covered include an introduction to Cisco IOS command modes, navigation and editing features, help features, and command history features. Additional user interfaces include Setup mode used for first-time startup , the Cisco Web Browser, and user menus configured by a system administrator. Each command mode has its own set of commands available for the configuration, maintenance, and monitoring of router and network operations. The commands available to you at any given time depend on the mode you are in.

Cisco cli

The FWSM runs in a combination of the following modes:. The firewall mode determines if the security appliance runs as a Layer 2 or Layer 3 firewall. The security context mode determines if the FWSM runs as a single device or as multiple security contexts, which act like virtual devices. Some commands are only available in certain modes. Some commands can only be entered in certain modes. For example, to enter commands that show sensitive information, you need to enter a password and enter a more privileged mode. Then, to ensure that configuration changes are not entered accidentally, you have to enter a configuration mode. All lower commands can be entered in higher modes, for example, you can enter a privileged EXEC command in global configuration mode. When you are in the system configuration or in single context mode, the prompt begins with the hostname:. When you are within a context, the prompt begins with the hostname followed by the context name:. The prompt changes depending on the access mode:. Privileged EXEC mode lets you see all current settings up to your privilege level. The prompt includes the number sign :. Global configuration mode lets you change the FWSM configuration. Enter the configure terminal command in privileged EXEC mode to start global configuration mode.

On most systems you can enter the Ctrl-Z key combination at any time to interrupt the output and return to privileged EXEC mode. This form of help is called command syntax help, because it shows you cisco cli keywords or arguments are available based on the command, keywords, and arguments you already have entered. To access and list the interface configuration commands, use the following command: Command Purpose Router config interface type number Specifies the interface to be configured, and enters interface configuration mode, cisco cli.

This chapter includes the following sections:. For an overview of the Catalyst series operating system software configuration, refer to the Catalyst Series Switch Configuration Guide. For Catalyst series switch operating system software commands, refer to the Catalyst Series Switch Command Reference. There are two levels of access on the Network Analysis Module, each with different privileges:. Step 1 Log into the Catalyst series switch using the Telnet connection or the console port connection. Note To allow remote Telnet sessions, use the exsession on command.

The CLI is an interface, based on text. You type in configuration commands and use show commands to get the output from the router or switch. This might sound dated but with so many commands that are available to use, the CLI is much easier to work with than any of the graphical interfaces. The console is a physical port on the switch that allows access to the CLI. We typically use this the first time we configure the switch. Telnet and SSH are both options for remote access.

Cisco cli

The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language. This user interface allows you to directly and simply execute Cisco IOS commands, whether using a router console or terminal, or using remote access methods. Topics covered include an introduction to Cisco IOS command modes, navigation and editing features, help features, and command history features.

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Most EXEC mode commands are one-time commands, such as show or more commands, which show the current configuration status, and clear commands, which clear counters or interfaces. Next time you access the console, it will ask for this password. In general, the user EXEC commands allow you to connect to remote devices, change terminal line settings on a temporary basis, perform basic tests, and list system information. Many letters used for CLI navigation and editing were chosen to provide an easy way of remembering their functions. If an enable password has not been set, privileged EXEC mode can be accessed only from the router console terminal connected to the console port. Do not include a space. There are two levels of access on the Network Analysis Module, each with different privileges:. For example, the caret symbol in the following output shows the letter that was mistyped in the command:. Ctrl-E Moves the cursor to the end of the command line. When the cursor reaches the right margin, the command line shifts ten spaces to the left. You can instruct Cisco IOS software to match a regular expression pattern against the beginning or the end of the string. Lists commands in the current mode that begin with a particular character string. Ctrl - D Deletes the character at the cursor. The wildcard mask is a method for matching IP addresses or ranges of IP addresses.

The Cisco IOS user interface is divided into many different modes. The commands available to you depend on which mode you are currently in. Enter a question mark?

Lists information about the currently operational trunks and the VLANs supported by those trunks. Router co? The multiple-character regular expression a. The switch tells us that the command is incomplete. For cases where output continues beyond the bottom of the screen, such as with the output of many? Create a New Book. The Cisco IOS software command reference publications describe the function of the no form of the command whenever a no form is available. To reenable the editing features for the current terminal session, use the following command in user EXEC mode:. First, we use the line console 0 command to dive into the line configuration. Matches 1 or more single-character or multiple-character patterns. Table 1. For example, you can abbreviate the configure terminal command to config t. At the --More-- prompt, the user specifies a search that continues the filtered output beginning with the first line that contains Serial0. By issuing the default command-name command, you can configure the command to its default setting.