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unable to upgrade Cisco 2600XM to 12.4-25d

Dear all,

I just tried to upgrade my Cisco 2600XM router from 12.3-6 IOS to 12.4-25d IOS, but I was unable to start the router with this new IOS.

flash:c2600-ipbase-mz.123-6.bin (old IOS)

flash:/c2600-ipbasek9-mz.124-25d.bin (new IOS)


Output sh flash


System flash directory:

File  Length   Name/status

  1   9278868  c2600-ipbase-mz.123-6.bin

  2   13668524  c2600-ipbasek9-mz.124-25d.bin

[22947520 bytes used, 10082624 available, 33030144 total]

32768K bytes of processor board System flash (Read/Write)


Output sh version


Cisco Internetwork Operating System Software
IOS (tm) C2600 Software (C2600-IPBASE-M), Version 12.3(6), RELEASE SOFTWARE (fc3
Copyright (c) 1986-2004 by cisco Systems, Inc.
Compiled Wed 11-Feb-04 19:24 by kellythw
Image text-base: 0x80008098, data-base: 0x80ECF624

ROM: System Bootstrap, Version 12.2(8r) [cmong 8r], RELEASE SOFTWARE (fc1)

R9_Trusted_KPN uptime is 1 hour, 9 minutes
System returned to ROM by reload
System image file is "flash:c2600-ipbase-mz.123-6.bin"

cisco 2611XM (MPC860P) processor (revision 0x300) with 94208K/4096K bytes of mem

Processor board ID JAE08138H00 (3270948457)
M860 processor: part number 5, mask 2
Bridging software.
X.25 software, Version 3.0.0.
2 FastEthernet/IEEE 802.3 interface(s)
32K bytes of non-volatile configuration memory.
32768K bytes of processor board System flash (Read/Write)

Configuration register is 0x2102


I configured the boot settings using the following command;

boot system flash:/c2600-ipbasek9-mz.124-25d.bin

Maybe there is something i forget, usually an upgrade works like this, right?

Anyone any comments please?

Thanks in advance,

ps; very strange is also the fact that i couldn't configure the ip address (, but it is subnetted correctly. Looks like the router doesn't support VLSM, or something like that. Any support would be very helpfull.


Everyone's tags (3)

unable to upgrade Cisco 2600XM to 12.4-25d


your boot command  for a 2600 router should be :-


boot system flash c2600-ipbasek9-mz.124-25d.bin


Also ake sure you have:-


ip subnet-zero


In you config for VLSM

Please rate useful posts.

Regards, Alex. Please rate useful posts.

unable to upgrade Cisco 2600XM to 12.4-25d

  Is there a current boot statement in the config , if so you must remove it  and add the new statement pointing to the new image.  The new statement must be the first one listed as the router looks at them in order from the top to bottom in the config.

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