Cisco 2600 Password Recovery

Posted on 2004-08-03
Medium Priority
Last Modified: 2008-01-09
Hi all,

I have a Cisco 2600 that I am attempting to 'password recover'.

When I Console into it using 9600 baud/No Parity/8 data bits/1 stop bit/No flow control - I am able to see the router boot up and so forth.

I press "Break" - and nothing will happen.  Once I press CTRL+Break - I am able to get to "rommon 1>"

THis is where the problem starts - eventhough I am at the prompt, I am unable to type anything in with the blinking cursor simply staring at me.

This whole time, the keyboard is working perfectly in other applications and so forth...

So, any idea why I wouldn't be able to type in the router?


Question by:wirescream
LVL 17

Expert Comment

ID: 11708420
If you don't see the letters don't worry, just type and press enter as needed.

Using the power switch, turn off the router and then turn it back on.

Important: To simulate step 4 on a Cisco 6400, pull out and then replace the Node Route Processor (NRP) or Node Switch Processor (NSP) card.

Important: To simulate step 4 on a Cisco 6x00 using NI-2, pull out and then replace the NI-2 card.

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

If the break sequence doesn't work, see Possible Key Combinations for Break Sequence During Password Recovery for other key combinations.

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

Type reset at the rommon 2> 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 configure memory or copy startup-config running-config to copy the nonvolatile RAM (NVRAM) into memory.

Do not type configure terminal.

Type write terminal or show running-config.

The show running-config and write terminal 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 (enable password, enable secret, vty, console passwords, and so on) either in encrypted or unencrypted format. The unencrypted passwords can be re-used, the encrypted ones will have to be changed with a new one.

Type configure terminal and make the changes.

The prompt is now hostname(config)#.

Type enable secret <password> to change the enable secret password, for example.

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 or end to leave the configuration mode.

The prompt is now hostname#.

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

LVL 17

Expert Comment

ID: 11708431

Expert Comment

ID: 11709071
If you are using hyperterminal go to connection properties-->settings-->ASCI setup and check echo typed characters locally.
The new generation of project management tools

With monday.com’s project management tool, you can see what everyone on your team is working in a single glance. Its intuitive dashboards are customizable, so you can create systems that work for you.


Author Comment

ID: 11709497

Thank you for the link.  I used that same link to initially get going but am somewhat stalled at this point with the above problem.


Thank you.  I am using HT.  Same thing after checking that option though :(

System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)
Copyright (c) 1999 by cisco Systems, Inc.
TAC:Home:SW:IOS:Specials for info
C2600 platform with 40960 Kbytes of main memory

program load complete, entry point: 0x80008000, size: 0x6fdb4c
PC = 0xfff0a530, Vector = 0x500, SP = 0x827ffeb0

monitor: command "boot" aborted due to user interrupt
rommon 1 >

Essentially - I turn the router ON, Hit CTRL+Break 10 seconds into the boot, end up at the rommon 1> prompt - and cannot go anywhere from that.. Almost as if my keyboard does not want to cooperate any more.

Anyhow.. // Anyone..?

LVL 17

Expert Comment

ID: 11709604
Are you using the cisco cable to connect?

Accepted Solution

orion411 earned 220 total points
ID: 11710247
Make sure Scroll Lock isn't on.
LVL 10

Expert Comment

ID: 11710259
make sure you are using the blue Cisco console cable and connecting to the console port (should be labeled).  settings should be:
Bits per sec    :  9600
Data bits       :     8
Parity          :  none
Stop bits       :     1
Flow control    :  none

are you able to console into another router or switch,  you may have a bad cable or the console port on the router may be damaged.

Author Comment

ID: 11710895

I am using a Rollover cable w/ a DB 9 adapter.


Thank you for fixing my issue. :)


The cable / the router / and the settings are all good.
LVL 17

Expert Comment

ID: 11714633
I never thought of the scroll lock.  I have never seen that one before..  

Good call orion411.  

Featured Post

Hire Technology Freelancers with Gigs

Work with freelancers specializing in everything from database administration to programming, who have proven themselves as experts in their field. Hire the best, collaborate easily, pay securely, and get projects done right.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

If you’re involved with your company’s wide area network (WAN), you’ve probably heard about SD-WANs. They’re the “boy wonder” of networking, ostensibly allowing companies to replace expensive MPLS lines with low-cost Internet access. But, are they …
How to fix a SonicWall Gateway Anti-Virus firewall blocking automatic updates to apps like Windows, Adobe, Symantec, etc.
NetCrunch network monitor is a highly extensive platform for network monitoring and alert generation. In this video you'll see a live demo of NetCrunch with most notable features explained in a walk-through manner. You'll also get to know the philos…
Michael from AdRem Software explains how to view the most utilized and worst performing nodes in your network, by accessing the Top Charts view in NetCrunch network monitor (https://www.adremsoft.com/). Top Charts is a view in which you can set seve…

600 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question