Password Recovery 3745

Unanswered Question
Mar 20th, 2007

How can I recover the user id and password if forgotten on a 3745 router?

I have this problem too.
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deigonza Tue, 03/20/2007 - 17:11

Hi,In order to guide you toward a solution, I will provide you with some basic steps that will help you access your router.

To recover your password, complete these steps:

1.Attach a terminal or PC with terminal emulation to the console port of the router.

2.If you still have access to the router, type show version , and record the setting of the configuration register. It is usually 0x2102 or 0x102.

3.If you do not have access to the router (because of a lost login or TACACS password), you can safely assume that your configuration register is set to 0x2102.

4.Use the power switch to turn off the router, and then turn it back on

5.Press CTRL + Break on the terminal keyboard within 60 seconds of the power-up to put the router into ROMMON

6.Type confreg 0x2142 at the rommon 1> prompt to boot from Flash without loading the configuration

7.Type reset at the rommon 2> prompt. (The router reboots, but ignores its saved configuration)

8.Type no after each setup question, or press Ctrl-C to skip the initial setup procedure

9.Type enable at the Router> prompt. (You are taken to the enable mode, and the Router# prompt appears.)

10.Important: Type configure memory or copy startup-config running-config to copy the nonvolatile RAM (NVRAM) into memory. Do not type configure terminal

11.Type write terminal or show running-config .

12.Type configure terminal and make the changes. (The prompt is now hostname(config)#.)

For example, type enable secret to change the enable secret password.

13.Issue the no shutdown command on every interface that is used. If you issue a show ip interface brief command, ensure that every interface that you want to use is "up up".

14.Type config-register 0x2102, or the value you recorded in step 2.

15.Press Ctrl-Z or end to leave the configuration mode The prompt is now changed to hostname#.

16.Type write memory or copy running-config startup-config to commit the changes.

For more information and examples you can take a look at:

http://www.cisco.com/warp/customer/474/pswdrec_1700.shtml

Please rate this post if helpful. Thanks

Allan

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