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Contents
Description
This document describes the password recovery procedure for the following Cisco products:
- Cisco 2000
- Cisco 2500
- Cisco 3000
- Cisco 4000
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- Cisco AccessPro
- Cisco 7000 (RP)
- Cisco AGS
- Cisco IGS
- Cisco STS-10x
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Step-by-Step Procedure
Attach a terminal or PC with terminal emulation to the console port of the router. Use the following terminal settings:
9600 baud rate
No parity
8 data bits
1 stop bit
No flow control
The required console cable specifications are described in the Cabling Guide for RJ-45 Console and AUX Ports (Cisco''s 1000 series, 2500 series, and AS5100).
- Type show version and record the setting of the configuration register. Click here to see output of a show version command.
The configuration register setting is usually 0x2102 or 0x102.
- Using the switch, turn off the router and then turn it on.
- Press Break on the terminal keyboard within 60 seconds of the powerup to put the router into ROMMON.
- Type o/r 0x2142 at the
> prompt to boot from Flash without loading the configuration.
- Type i at the
> prompt.
The router reboots but ignores its saved configuration.
- Type no after each setup question or press Ctrl-C to skip the initial setup procedure.
- Type enable at the
Router> prompt.
You''ll be in enable mode and see the Router# prompt.
- Important Type config mem or copy start running to copy the nonvolatile RAM (NVRAM) into memory. Do not type config term.
- Type wr term or show running.
The show running and wr term commands show the configuration of the router. In this configuration you see under all the interfaces the shutdown command, which means all interfaces are currently shutdown. Also, you can see the passwords either in encrypted or unencrypted format.
- Type config term and make the changes.
The prompt is now hostname(config)#.
- Type enable secret <password>.
- Issue the no shutdown command on every interface that is used. If you issue a show ip interface brief command, every interface that you want to use should be "up up".
- Type config-register 0x2102, or the value you recorded in step 2.
- Press Ctrl-z to leave the configuration mode.
The prompt is now hostname#.
- Type write mem or copy running startup to commit the changes.
Example of Password Recovery on a Cisco 2500
The example shown here is password recovery on a Cisco 2500.
Router>en
Password:
Password:
Password:
% Bad secrets
Router>show version
Cisco Internetwork Operating System Software
IOS (tm) 2500 Software (C2500-JS-L), Version 12.0(7)T, RELEASE SOFTWARE (fc2)
Copyright (c) 1986-1999 by cisco Systems, Inc.
Compiled Mon 06-Dec-99 17:10 by phanguye
Image text-base: 0x0306C4E0, data-base: 0x00001000
ROM: System Bootstrap, Version 5.2(8a), RELEASE SOFTWARE
BOOTFLASH: 3000 Bootstrap Software (IGS-RXBOOT), Version 10.2(8a), RELEASE SOFTWARE (fc1)
Router uptime is 5 minutes
System returned to ROM by power-on
System image file is "flash:/c2500-js-l.120-7. |
