Re: Restore Factory Defaults on a 1600 series Router

Clark-k · ‎03-17-2002

We have a 1601 Router that was shelved a year back. And now we are ready to put it back in service but do not have the password for the router. We also do not have the console cable. I am making a new one right now. Is there any way to reset the router without IOS access, like a reset button. My other routers have such a switch or button, but I can not find one on this Cisco. Otherwise I am going to attempt the procedure to recover a lost enable password.

Plese let me know if I have overlooked anything.

Thank You for your time,

Kevin

dannie-chan · ‎03-17-2002

Hi Kevin,

If you lose you password, you need to use console cable and reset your password as following:

Password Recovery Procedure

for the Cisco 1600 Series Routers

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Contents

Introduction

Step-by-Step Procedure

Example of Password Recovery Procedure

Related Information

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Introduction

This document describes the procedure for recovering an enable password or enable secret passwords. These passwords are used to protect access to privileged EXEC and configuration modes. The enable password password can be recovered but the enable secret password is encrypted and can only be replaced with a new password using the procedure below.

Note: This password recovery procedure works for the following Cisco products:

Cisco 806

Cisco 827

Cisco uBR900

Cisco 1003

Cisco 1004

Cisco 1005

Cisco 1400

Cisco 1600

Cisco 1700

Cisco 2600

Cisco 3600

Cisco 4500

Cisco 4700

Cisco AS5x00

Cisco 6x00

Cisco 7000 (RSP7000)

Cisco 7100

Cisco 7200

Cisco 7500

Cisco uBR7100

Cisco uBR7200

Cisco uBR10000

Cisco 12000

Cisco LS1010

Catalyst 2948G-L3

Catalyst 4840G

Catalyst 4908G-L3

Catalyst 5500 (RSM)

Catalyst 8510-CSR

Catalyst 8510-MSR

Catalyst 8540-CSR

Catalyst 8540-MSR

Cisco MC3810

Cisco NI-2

Cisco VG200 Analog Gateway

Route Processor Module

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).

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. Click here to see the output of a show version command.

If you don't have access to the router (because of a lost login or tacacs password), you can safely consider that your configuration register is set to 0x2102.

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 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.

Example of Password Recovery Procedure

The example below presents an actual password recovery procedure. We created this example using a Cisco 2600. Even if you are not using a Cisco 2600, this example will be almost exactly what you experience on your product.

Router>enable

Password:

% Bad secrets

Router>show version

Cisco Internetwork Operating System Software

IOS (tm) C2600 Software (C2600-IS-M), Version 12.0(7)T, RELEASE SOFTWARE (fc2)

Compiled Tue 07-Dec-99 02:21 by phanguye

Image text-base: 0x80008088, data-base: 0x80C524F8

ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)

Router uptime is 3 minutes

System returned to ROM by abort at PC 0x802D0B60

System image file is "flash:c2600-is-mz.120-7.T"

cisco 2611 (MPC860) processor (revision 0x202) with 26624K/6144K bytes of memory.

Processor board ID JAB031202NK (3878188963)

M860 processor: part number 0, mask 49

Bridging software.

X.25 software, Version 3.0.0.

Basic Rate ISDN software, Version 1.1.

2 Ethernet/IEEE 802.3 interface(s)

2 Serial(sync/async) network interface(s)

1 ISDN Basic Rate interface(s)

32K bytes of non-volatile configuration memory.

8192K bytes of processor board System flash partition 1 (Read/Write)

8192K bytes of processor board System flash partition 2 (Read/Write)

Configuration register is 0x2102

Router>

!--- The router was just powercycled and during bootup a

!--- break sequence was sent to the router.

!

*** System received an abort due to Break Key ***

signal= 0x3, code= 0x500, context= 0x813ac158

PC = 0x802d0b60, Vector = 0x500, SP = 0x80006030

rommon 1 > confreg 0x2142

You must reset or power cycle for new config to take effect

rommon 2 > reset

System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)

TAC:Home:SW:IOS:Specials for info

C2600 platform with 32768 Kbytes of main memory

program load complete, entry point: 0x80008000, size: 0x6fdb4c

Self decompressing the image : ###############################

##############################################################

############################### [OK]

Restricted Rights Legend

Use, duplication, or disclosure by the Government is

subject to restrictions as set forth in subparagraph

(c) of the Commercial Computer Software - Restricted

Rights clause at FAR sec. 52.227-19 and subparagraph

(c) (1) (ii) of the Rights in Technical Data and Computer

Software clause at DFARS sec. 252.227-7013.

cisco Systems, Inc.

170 West Tasman Drive

San Jose, California 95134-1706

Cisco Internetwork Operating System Software

IOS (tm) C2600 Software (C2600-IS-M), Version 12.0(7)T, RELEASE SOFTWARE (fc2)

Compiled Tue 07-Dec-99 02:21 by phanguye

Image text-base: 0x80008088, data-base: 0x80C524F8

cisco 2611 (MPC860) processor (revision 0x202) with 26624K/6144K bytes of memory.

Processor board ID JAB031202NK (3878188963)

M860 processor: part number 0, mask 49

Bridging software.

X.25 software, Version 3.0.0.

Basic Rate ISDN software, Version 1.1.

2 Ethernet/IEEE 802.3 interface(s)

2 Serial(sync/async) network interface(s)

1 ISDN Basic Rate interface(s)

32K bytes of non-volatile configuration memory.

8192K bytes of processor board System flash partition 1 (Read/Write)

8192K bytes of processor board System flash partition 2 (Read/Write)

--- System Configuration Dialog ---

Would you like to enter the initial configuration dialog? [yes/no]: n

Press RETURN to get started!

00:00:19: %LINK-3-UPDOWN: Interface BRI0/0, changed state to up

00:00:19: %LINK-3-UPDOWN: Interface Ethernet0/0, changed state to up

00:00:19: %LINK-3-UPDOWN: Interface Ethernet0/1, changed state to up

00:00:19: %LINK-3-UPDOWN: Interface Serial0/0, changed state to down

00:00:19: %LINK-3-UPDOWN: Interface Serial0/1, changed state to down

00:00:20: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0/0, changed state to down

00:00:20: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/0, changed state to up

Router>

00:00:20: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/1, changed state to up

00:00:20: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to down

00:00:20: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1, changed state to down

00:00:50: %SYS-5-RESTART: System restarted --

Cisco Internetwork Operating System Software

IOS (tm) C2600 Software (C2600-IS-M), Version 12.0(7)T, RELEASE SOFTWARE (fc2)

Compiled Tue 07-Dec-99 02:21 by phanguye

00:00:50: %LINK-5-CHANGED: Interface BRI0/0, changed state to administratively down

00:00:52: %LINK-5-CHANGED: Interface Ethernet0/0, changed state to administratively down

00:00:52: %LINK-5-CHANGED: Interface Serial0/0, changed state to administratively down

00:00:52: %LINK-5-CHANGED: Interface Ethernet0/1, changed state to administratively down

00:00:52: %LINK-5-CHANGED: Interface Serial0/1, changed state to administratively down

00:00:53: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/0, changed state to down

00:00:53: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/1, changed state to down

Router>

Router>enable

Router#copy startup-config running-config

Destination filename [running-config]?

1324 bytes copied in 2.35 secs (662 bytes/sec)

Router#

00:01:24: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0/0:1, changed state to down

00:01:24: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0/0:2, changed state to down

Router#configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

Router(config)#enable secret cisco

Router(config)#^Z

00:01:54: %SYS-5-CONFIG_I: Configured from console by console

Router#show ip interface brief

Interface IP-Address OK? Method Status Protocol

Ethernet0/0 10.200.40.37 YES TFTP administratively down down

Serial0/0 unassigned YES TFTP administratively down down

BRI0/0 193.251.121.157 YES unset administratively down down

BRI0/0:1 unassigned YES unset administratively down down

BRI0/0:2 unassigned YES unset administratively down down

Ethernet0/1 unassigned YES TFTP administratively down down

Serial0/1 unassigned YES TFTP administratively down down

Loopback0 193.251.121.157 YES TFTP up up

Router#configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

Router(config)#interface Ethernet0/0

Router(config-if)#no shutdown

Router(config-if)#

00:02:14: %LINK-3-UPDOWN: Interface Ethernet0/0, changed state to up

00:02:15: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/0, changed state to up

Router(config-if)#interface BRI0/0

Router(config-if)#no shutdown

Router(config-if)#

00:02:26: %LINK-3-UPDOWN: Interface BRI0/0:1, changed state to down

00:02:26: %LINK-3-UPDOWN: Interface BRI0/0:2, changed state to down

00:02:26: %LINK-3-UPDOWN: Interface BRI0/0, changed state to up

00:02:115964116991: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0/0, TEI 68 changed to up

Router(config-if)#^Z

Router#

00:02:35: %SYS-5-CONFIG_I: Configured from console by console

Router#copy running-config startup-config

Destination filename [startup-config]?

Building configuration...

[OK]

Router#show version

Cisco Internetwork Operating System Software

IOS (tm) C2600 Software (C2600-IS-M), Version 12.0(7)T, RELEASE SOFTWARE (fc2)

Compiled Tue 07-Dec-99 02:21 by phanguye

Image text-base: 0x80008088, data-base: 0x80C524F8

ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)

Router uptime is 3 minutes

System returned to ROM by abort at PC 0x802D0B60

System image file is "flash:c2600-is-mz.120-7.T"

cisco 2611 (MPC860) processor (revision 0x202) with 26624K/6144K bytes of memory.

Processor board ID JAB031202NK (3878188963)

M860 processor: part number 0, mask 49

Bridging software.

X.25 software, Version 3.0.0.

Basic Rate ISDN software, Version 1.1.

2 Ethernet/IEEE 802.3 interface(s)

2 Serial(sync/async) network interface(s)

1 ISDN Basic Rate interface(s)

32K bytes of non-volatile configuration memory.

8192K bytes of processor board System flash partition 1 (Read/Write)

8192K bytes of processor board System flash partition 2 (Read/Write)

Configuration register is 0x2142

Router#configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

Router(config)#config-register 0x2102

Router(config)#^Z

00:03:20: %SYS-5-CONFIG_I: Configured from console by console

Router#show version

Cisco Internetwork Operating System Software

IOS (tm) C2600 Software (C2600-IS-M), Version 12.0(7)T, RELEASE SOFTWARE (fc2)

Compiled Tue 07-Dec-99 02:21 by phanguye

Image text-base: 0x80008088, data-base: 0x80C524F8

ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)

Router uptime is 3 minutes

System returned to ROM by abort at PC 0x802D0B60

System image file is "flash:c2600-is-mz.120-7.T"

cisco 2611 (MPC860) processor (revision 0x202) with 26624K/6144K bytes of memory.

Processor board ID JAB031202NK (3878188963)

M860 processor: part number 0, mask 49

Bridging software.

X.25 software, Version 3.0.0.

Basic Rate ISDN software, Version 1.1.

2 Ethernet/IEEE 802.3 interface(s)

2 Serial(sync/async) network interface(s)

1 ISDN Basic Rate interface(s)

32K bytes of non-volatile configuration memory.

8192K bytes of processor board System flash partition 1 (Read/Write)

8192K bytes of processor board System flash partition 2 (Read/Write)

Configuration register is 0x2142 (will be 0x2102 at next reload)

Router#

Dannie

Clark-k · ‎03-18-2002

I got in ...

I have now started configuring the thing. I tried to load 1600-Fast-Step-22b-English, but when it tries to find my router it says "This router is not supported." Does Fast-Step require a certain IOS version. Mine is 11.1(10)AA

mcoffey · ‎03-21-2002

Check the guide here...

http://www.cisco.com/warp/public/474/pswdrec_1600.shtml