This is the documentation for the 20.02 version. Looking for the documentation of the latest version? Have a look here.

Working in the TNSR CLI

Command Prompt

The TNSR CLI command prompt has a several components:

<hostname> tnsr<(mode)># <user input>

These components are:


The fully qualified hostname of the router.


This section of the prompt changes depending on the current mode to indicate that a different subset of commands is available.

See also

For a list of modes and prompt strings, see Mode List.

user input

This area is where a user enters commands and other input.

In this brief example, the router hostname is router, and the mode section of the prompt is shown changing when a command enters or exits a mode.

router tnsr# configure
router tnsr(config)# interface GigabitEthernet3/0/0
router tnsr(config-interface)# description Management
router tnsr(config-interface)# exit
router tnsr(config)# exit
router tnsr#

Command History

The TNSR CLI stores the last 300 commands across sessions. This command history is kept in ~/.tnsr_history.

The command history is accessed by pressing Ctrl-P (previous command), Ctrl-N (next command), or by using the up and down arrow keys.

The number of commands stored by TNSR can be controlled by the cli history-config lines <count> command. To restore the default value, use no cli history-config lines.

This behavior may also be disabled by the cli history-config disable or no cli history-config enable commands. Use cli history-config enable to turn it back on.


The TNSR CLI supports case-sensitive tab expansion and prediction for input to speed up interactive work. For example, the first few letters of a command or entity may be typed, depending on context, and then pressing the tab key will complete a portion or all of the remaining input where possible. Additionally, in cases when there is an existing entry or only one possible choice, pressing tab will automatically insert the entire entry. Commands or entities may also be shortened provided the input is not ambiguous.


Press ? to show possible completions of the current command when in the middle of a word, or press it between words to show the next available parameter (Finding Help).

Keyboard Shortcuts

The TNSR CLI supports several CLI navigation and editing key combinations, including:



Previous History Command

Ctrl-P or up arrow

Next History Command

Ctrl-N or down arrow

Erase Character

Backspace or Ctrl-H

Erase Word


Cursor to Start of Line


Cursor to End of Line


Clear and Redraw Screen


Exit the CLI


Context-Sensitive Help