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how to password recovery cisco 2503 router when jump to zero

I have an old cisco 2503 router in my work. I have to test something and

i choose to use it. When I entered this router, there has password (it seem to be set by old employee ) . I don't know password and i decided to recover password, reboot router, enter rommon mode, But whenever i type confreg 0x2142 , it's jump to original user mode. can't recover password.

what should i do ?

here is originial msg from router console.

>confreg 0x2142

Exception: Jump to zero at 0x3 (PC)

System Bootstrap, Version 5.2(8a), RELEASE SOFTWARE
Copyright (c) 1986-1995 by cisco Systems
2500 processor with 2048 Kbytes of main memory

F3: 4954544+67224+340432 at 0x3000060

              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) 2500 Software (C2500-I-L), Version 11.3(11d), RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2003 by cisco Systems, Inc.
Compiled Tue 22-Jul-03 17:02 by eaarmas
Image text-base: 0x03029994, data-base: 0x00001000

cisco 2500 (68030) processor (revision N) with 2048K/2048K bytes of memory.
Processor board ID 05535516, with hardware revision 00000000
Bridging software.
X.25 software, Version 3.0.0.
Basic Rate ISDN software, Version 1.0.
1 Ethernet/IEEE 802.3 interface(s)
2 Serial network interface(s)
1 ISDN Basic Rate interface(s)
32K bytes of non-volatile configuration memory.
8192K bytes of processor board System flash (Read ONLY)

Press RETURN to get started!

I can enter user mode only. this is sh ver

R2503>sh ver
Cisco Internetwork Operating System Software
IOS (tm) 2500 Software (C2500-I-L), Version 11.3(11d), RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2003 by cisco Systems, Inc.
Compiled Tue 22-Jul-03 17:02 by eaarmas
Image text-base: 0x03029994, data-base: 0x00001000

ROM: System Bootstrap, Version 5.2(8a), RELEASE SOFTWARE
BOOTFLASH: 3000 Bootstrap Software (IGS-RXBOOT), Version 10.2(8a), RELEASE SOFTW
ARE (fc1)

R2503 uptime is 5 minutes
System restarted by error - Jump to zero, PC 0x3
System image file is "flash:c2500-i-l.113-11d.bin", booted via flash

cisco 2500 (68030) processor (revision N) with 2048K/2048K bytes of memory.
Processor board ID 05535516, with hardware revision 00000000
Bridging software.
X.25 software, Version 3.0.0.
Basic Rate ISDN software, Version 1.0.
1 Ethernet/IEEE 802.3 interface(s)
2 Serial network interface(s)
1 ISDN Basic Rate interface(s)
32K bytes of non-volatile configuration memory.
8192K bytes of processor board System flash (Read ONLY)

Configuration register is 0x2102

3 REPLIES
Hall of Fame Super Gold

Re: how to password recovery cisco 2503 router when jump to zero

Your question brings back memories of doing password recovery on 2500 routers. The key thing to understand is that confreg is for operating systems more recent than what is running on the 2503. The key to password recovery on the 2503 is to get into rommon and then to use the o/r command to set the config register. For details please see this link:

http://www.cisco.com/en/US/products/hw/routers/ps233/products_password_recovery09186a0080094795.shtml

HTH

Rick

Cisco Employee

Re: how to password recovery cisco 2503 router when jump to zero

Hello,

Try o/r 0x2142

http://www.cisco.com/en/US/products/hw/routers/ps233/products_password_recov

ery09186a0080094795.shtml

Regards,

NT

New Member

Re: how to password recovery cisco 2503 router when jump to zero

thz a lot . now i can resolve this problem  with o/r 0x2142 ,

i was confused with confreg 0x2142 command with cisco 2600 series & 2800 series, i forgot for 2500 series. Thz a lot for adivse , all experts.

thz

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