Starting a Router

Enhanced Editing Commands

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Router Command History

Ctrl-P or Up Arrow = Recalls last (previous) commands

Ctrl-N or Down Arrow = Recalls more recent commands

show history= Shows command buffer contents

history size line = Sets the buffer size permanently

terminal history size lines = Sets session command buffer size

show version Command

wg_ro_a#show version
Cisco Internetwork Operating System Software
IOS (tm) 2500 Software (C2500-JS-L), Version 12.0(3), RELEASE SOFTWARE (fc1)
Copyright (c) 1986-1999 by cisco Systems, Inc.
Compiled Mon 08-Feb-99 18:18 by phanguye
Image text-base: 0x03050C84, data-base: 0x00001000
ROM: System Bootstrap, Version 11.0(10c), SOFTWARE
BOOTFLASH: 3000 Bootstrap Software (IGS-BOOT-R), Version 11.0(10c), RELEASE SOFTWARE(fc1)
wg_ro_a uptime is 20 minutes
System restarted by reload
System image file is "flash:c2500-js-l_120-3.bin"
(output omitted)
--More--
Configuration register is 0x2102

Viewing the Configuration

show running-config and show startup-config Commands

In RAM

wg_ro_c#show running-config
Building configuration...

Current configuration:

!version 12.0
!
-- More --

In NVRAM

wg_ro_c#show startup-config
Using 1359 out of 32762 bytes
!
version 12.0
!
-- More --

•Displays the current and saved configuration

Summary

•The startup of a Cisco router requires that you verify the physical installation, power up the router, and view the Cisco IOS software output on the console.
•The router startup sequence is similar to the startup sequence of the Catalyst switch. The router first performs POST, then it finds and loads the IOS image. Finally, it finds and loads the device configuration file.
•Use the enable command to access the privileged EXEC mode from the user EXEC mode.

Summary (Cont.)

•The Cisco router uses Cisco IOS software with extensive command-line input help facilities, including context-sensitive help.
•The Cisco IOS CLI includes an enhanced editing mode that provides a set of editing key functions.
•The Cisco router CLI provides a history or record of commands you have entered. This feature, called the command history, is particularly useful to help you recall long or complex commands or entries.
•After logging in to a Cisco router, you can verify the router initial startup status using the router status commands: show version, show running-configuration, and show startup-configuration.