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OLD 2501 Router

I have an old 2501 router that I want to put back in service.

When I do a sh ver the Configuration register is 0x42

When I try to set the Configuration register to 0x2102 it just resets the router.

Charlie in OhiO


Re: OLD 2501 Router

WHen you enter the command, the router just reloads?

Is this happening continuously ?

Can you paste outputs of

1. sh version

2. sh stacks

Re: OLD 2501 Router

Resets when I attempt to change register

Router#sh ver

Cisco Internetwork Operating System Software

IOS (tm) 2500 Software (C2500-IS-L), Version 12.0(22), RELEASE SOFTWARE (fc1)

Copyright (c) 1986-2002 by cisco Systems, Inc.

Compiled Tue 02-Apr-02 01:34 by srani

Image text-base: 0x0000144C, data-base: 0x006F70B0

ROM: System Bootstrap, Version 11.0(10c)XB1, PLATFORM SPECIFIC RELEASE SOFTWARE (fc1)

BOOTFLASH: 3000 Bootstrap Software (IGS-BOOT-R), Version 11.0(10c)XB1, PLATFORM SPECIFIC RELEASE SOFTWAR

Router uptime is 3 hours, 37 minutes

System restarted by power-on

System image file is "flash:2:c2500-is-l.120-22.bin"

cisco 2500 (68030) processor (revision D) with 16384K/2048K bytes of memory.

Processor board ID 02103547, with hardware revision 00000000

Bridging software.

X.25 software, Version 3.0.0.

1 Ethernet/IEEE 802.3 interface(s)

2 Serial network 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 0x42


Router#sh sta

Router#sh stack

Router#sh stacks

Minimum process stacks:

Free/Size Name

2476/4000 Init


3588/4000 DHCP Client

2820/4000 Exec

Interrupt level stacks:

Level Called Unused/Size Name

3 0 3000/3000 Serial interface state change interrupt

4 311 2880/3000 Network interfaces

5 3726 2896/3000 Console Uart


Re: OLD 2501 Router

Are the above outputs taken from the router, after the reload or was it from a backed up file, you had taken before ?

The stack and sh version outputs look clean, except that the config register is 0x42.

Try reseting the router once, and hit the Break or Ctrl+Break keys, to break the router into ROMMON mode.

rommon1>o/r 0x2102 - sets the register settings

rommon1>i - initializes the IOS.

See if this works, and puts the router back to normal register settings.

Let us know how this one goes..

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