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New Member

Problems booting IOS 12.2.12a on 2502


I have encountered issues coercing a 2502 to boot IOS 12.2.12a (IP Plus) by tftp. The image is downloaded successfully from the tftp server, however, the router crashes shortly thereafter. IOS 12.1(17) IP only loads without a problem.

Requirements for this release are 16F/10D. This box has 16MB of DRAM and no flash - boots soley from tftp. The boot ROMs appear to be stock as well. An acquaintance suggested that 12.2 requires new boot ROMs in order to work. Can anyone validate this?

Also, I have a 2513 with no fixed DRAM installed. sh ver reports primary/shared memory as 14336K/2048K. 8MB flash on this one. What is the likelihood of 12.2 running on this box?

Thank you in advance for any thoughts. Examples for the 2502 are below.

System Bootstrap, Version 5.2(8a), RELEASE SOFTWARE

Copyright (c) 1986-1995 by cisco Systems

2500 processor with 16384 Kbytes of main memory

Loading c2500-dos-l.122-12a.bin from (via Serial0.1): !!!!!!...

[OK - 14601492/16121746 bytes]

F3: 13565520+1035940+897276 at 0x1000


%Software-forced reload

... debug info ...

Exception: Software forced crash at 0x29A3E0 (PC)

Cisco Internetwork Operating System Software

IOS (tm) 2500 Software (C2500-I-L), Version 12.1(17), RELEASE SOFTWARE (fc1)

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

Compiled Wed 04-Sep-02 04:58 by kellythw

Image text-base: 0x0000144C, data-base: 0x00748444

ROM: System Bootstrap, Version 5.2(8a), RELEASE SOFTWARE

BOOTLDR: 3000 Bootstrap Software (IGS-RXBOOT), Version 10.2(8a), RELEASE SOFTWARE (fc1)

nietzsche uptime is 3 minutes

System returned to ROM by reload

System image file is "tftp://"

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

Processor board ID 01170866, with hardware revision 00000000

Bridging software.

X.25 software, Version 3.0.0.

Cisco-ET Extended Temperature platform.

1 Token Ring/IEEE 802.5 interface(s)

2 Serial network interface(s)

32K bytes of non-volatile configuration memory.

Configuration register is 0x2102


Cisco Employee

Re: Problems booting IOS 12.2.12a on 2502

It seems that the image that is being loaded is IP/IPX/AT/DEC/FW PLUS and NOT IP Plus.

Please download the IP Plu image only and try loading it up. The filename that the IP Plus image has is c2500-is-l.122-12a.bin and its requirement meets what the router has.

The 2513 should be ok as well.

Hope this helps.


New Member

Re: Problems booting IOS 12.2.12a on 2502

Egad, typo! You're right, it was not the IP Plus image, rather IP/IPX/AT/DEC/FW PLUS. Nevertheless, the IP only image c2500-i-l.122-12a.bin loads successfully, which, according to the documentation, requires 16F/10D - the same as c2500-dos-l.122-12a.bin.

Out of morbid curiosity I tried a couple of Enterprise images that require 16F/16D, the router faled to boot them as well.


Will adding flash and/or new boot ROMs provide the necessary memory conservation to make these images bootable or am I out of luck with this series of router?

I am working toward my CCNA and am using the Cisco Press books as a guide until I feel I am ready to enter a Cisco Academy (in other words, I want to have completed the course before begin =). Of particular note was the statement in the books that the 640-607 exam is based on 12.2.

Would you suggest that 12.0.24 IP/IPX/AT/DEC/FW PLUS (16F/8D) is semantically similar enough to 12.2 to be useful on the exam? No problems booting that image at all.

I may be going off the deep end with this, but it's a significant investment in time and energy, I want to make sure I'm doing it right!

Thank you again for your time and insight.

Cisco Employee

Re: Problems booting IOS 12.2.12a on 2502

You could take it to the 12.1 IP Plus. Seems like the 12.2 memory requirements are higher than what it is mentioned. 12.1 should be enough to deal with your requirements.



New Member

Re: Problems booting IOS 12.2.12a on 2502

Thanks for the info Yatin, looks like I need to start saving my pennies for a 4000 series ;)


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