Chapter 5 CLI Tips, Techniques, and Shortcuts

CLI Tips and Shortcuts

F I N A L D R A F T — C i s c o C o n f i d e n t i a l

Completing a Partial Command with the Tab Key

If you cannot remember a complete command name or want to reduce the amount of typing you have to perform, type the first few letters of the command, then press the Tab key. If only one command begins with that character string, the system completes the command for you. If the characters you entered indicate more than one command, the system beeps to indicate that the text string is not unique and the system provides a list of commands that match the text entered.

In the following example, the CLI recognizes conf as a unique string in EXEC mode and completes the command when you press the Tab key:

RP/0/RSP0/CPU0:router# conf <Tab>

RP/0/RSP0/CPU0:router# configure

The CLI displays the full command name, but you must press Enter to execute the command. This allows you to modify or reject the suggested command.

In the next example, the CLI recognizes two commands that match the text entered:

RP/0/RSP1/CPU0:router# co<Tab> configure copy RP/0/RSP1/CPU0:router# con<Tab>

RP/0/RSP1/CPU0:router# configure

Tip If your keyboard does not have a Tab key, press Ctrl-I instead.

Identifying Command Syntax Errors

If an incorrect command is entered, an error message is returned with the caret (^) at the point of the error. In the following example, the caret appears where the character was typed incorrectly in the command:

RP/0/RSP0/CPU0:router# configure termiMal

^

% Invalid input detected at '^' marker.

Note The percent sign (%) indicates the line in which the error message occurred.

To display the correct command syntax, type the “?” after the command:

RP/0/RSP0/CPU0:router# configure ?

exclusive Configure exclusively from this terminal terminal Configure from the terminal

<cr>

Using the no Form of a Command

Almost every configuration command has a no form. Depending on the command, the no form may enable or disable a feature. For example, when configuring an interface, the no shutdown command brings up the interface, and the shutdown command shuts down the interface. The username command creates a new user, and the no username command deletes a user when entered with a valid username.

Cisco ASR 9000 Series Aggregation Services Router Getting Started Guide

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Cisco Systems A9K24X10GETR, ASR 9000 manual Completing a Partial Command with the Tab Key, Identifying Command Syntax Errors
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A9KMOD80TR, A9K24X10GETR, ASR 9000 specifications

Cisco Systems has long been a leader in networking technology, providing cutting-edge solutions for service providers and enterprise organizations alike. Among their standout products is the Cisco ASR 9000 Series Aggregation Services Routers, notably the A9K24X10GETR and the A9KMOD80TR models. These routers are engineered to deliver unmatched performance, scalability, and versatility for networks that require high bandwidth and low latency.

The Cisco ASR 9000 Series is built for the needs of today's complex service provider and enterprise networks. A significant feature of the A9K24X10GETR is its 24-port 10-Gigabit Ethernet module. This functionality allows for high-density connectivity, making it ideal for aggregating numerous connections to different parts of a network while maintaining optimal performance. Whether used for Internet service providers delivering high-speed connectivity or for enterprises looking to connect multiple branches, the A9K24X10GETR provides robust and reliable data transmission.

Further enhancing the capabilities of the ASR 9000 is the A9KMOD80TR module, which supports an extensive range of services. This module is designed to run a variety of technologies, including Layer 2 and Layer 3 services, MPLS (Multiprotocol Label Switching), and IPv6. Its ability to integrate seamlessly into existing infrastructures while providing the advanced features customers demand makes it an invaluable asset for network engineering teams.

Another cutting-edge technology present in the ASR 9000 Series is its support for eBGP (External Border Gateway Protocol), which plays a critical role in managing traffic across multiple networks. The routers are equipped with advanced telemetry features, empowering operators with real-time insights into network performance and health. Additionally, they come with integrated security features that protect against DDoS threats and other vulnerabilities.

In summary, Cisco's ASR 9000 Series, particularly the A9K24X10GETR and A9KMOD80TR, combines high-density connections, extensive service support, and advanced security and telemetry capabilities. These routers are perfect for demanding environments where reliable performance and adaptability are crucial. With their focus on innovation and performance, Cisco continues to shape the future of networking technology.
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