Recuperación De Password Router C2800

Password Recovery Procedure for the Cisco 2900 Series Integrated Services Router
Document ID: 112033

Contents
Introduction Prerequisites Requirements Components Used Related Products Conventions Step−by−Step Procedure Example of Password Recovery Procedure Related Information

Introduction
This document describes how to recover the enable password and the enable secret passwords. Thesepasswords protect access to privileged EXEC and configuration modes. The enable password password can be recovered, but the enable secret password is encrypted and must be replaced with a new password. Use the procedure described in this document in order to replace the enable secret password.

Prerequisites
Requirements
There are no specific requirements for this document.

Components UsedThe information in this document is based on these hardware versions: • Cisco 2900 Series Integrated Services Router (ISR) The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.Related Products
Refer to Password Recovery Procedures for information on how to recover passwords for related products.

Conventions
Refer to Cisco Technical Tips Conventions for more information on document conventions.

Step−by−Step Procedure
Perform these steps in order to recover your password: 1. Either switch off or shut down the router. 2. Remove the compact flash that is on therear of the router. 3. Switch on the router. 4. Once the router is on Rommon mode, reinsert the compact flash. 5. Type confreg 0x2142 at the rommon 1> prompt in order to boot from Flash. This step bypasses the startup configuration where the passwords are stored. 6. Type reset at the rommon 2> prompt. The router reboots, but ignores the saved configuration. 7. Type no after each setup question, orpress Ctrl−C in order to skip the initial setup procedure. 8. Type enable at the Router> prompt. You are in enable mode and should see the Router# prompt. 9. Type configure memory or copy startup−config running−config in order to copy the nonvolatile RAM (NVRAM) into memory. Warning: Do not enter copy running−config startup−config or write. These commands erase your startup configuration. 10. Issuethe show running−config command. The show running−config command shows the configuration of the router. In this configuration, the shutdown command appears under all interfaces, which indicates all interfaces are currently shut down. In addition, the passwords (enable password, enable secret, vty, and console passwords) are in either an encrypted or unencrypted format. You can reuse unencryptedpasswords. You must change encrypted passwords to a new password. 11. Type configure terminal. The hostname(config)# prompt appears. 12. Type enable secret in order to change the enable secret password. For example:
hostname(config)#enable secret cisco

13. Issue the no shutdown command on every interface that you use. If you issue a show ip interface brief command, every interface that you wantto use should display up up. 14. Type config−register . Where is either the value you recorded in step 2 or 0x2102 . For example:
hostname(config)#config−register 0x2102

15. Press Ctrl−z or end in order to leave the configuration mode. The hostname# prompt appears. 16. Type write memory or copy running−config startup−config in order to commit the changes.

Example of Password RecoveryProcedure
This section provides an example of the password recovery procedure. This example was created with a Cisco 2900 Series ISR. Even if you do not use a Cisco 2900 Series ISR, this output provides an example of what you should experience on your product.
Router>enable Password: Password: Password: % Bad secrets Router>show version Cisco IOS Software, C2900 Software (C2900−UNIVERSALK9−M),...