IOS Upgrade Problem

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Oct 17th, 2008
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I have cisco 2821. I want to change the IOS for my testing purposes. I have download the IOS but unable to to load the IOS.

I am getting sometimes permission error and sometimes no sufficient place.

it is not giving me the option that delete the old IOS.

R-01#sh flash

-#- --length-- -----date/time------ path

1 38373256 Jun 3 2008 16:17:14 +00:00 c2800nm-advipservicesk9-mz.124-18.bin

25640960 bytes available (38375424 bytes used)

New IOS is 25 MB. Please help me out, Why I am getting permission error and why router is not giving me the option of delete the old IOS when I m loading the new IOS.

Address or name of remote host []?

Source filename []? c2800nm-ipvoice_ivs-mz.124-3g

Destination filename [c2800nm-ipvoice_ivs-mz.124-3g]? c2800nm-ipvoice_ivs-mz.124-3g.bin

Accessing tftp://

%Error opening tftp:// (Permission denied)

Address or name of remote host []?

Source filename [c2800nm-ipvoice_ivs-mz.124-3g]? c2800nm-ipvoice_ivs-mz.124-3g.bin

Destination filename [c2800nm-ipvoice_ivs-mz.124-3g.bin]?

Accessing tftp://

Loading c2800nm-ipvoice_ivs-mz.124-3g.bin from (via GigabitEthernet0/1): !

%Error copying tftp:// (Not enough space on device)

How to solve this problem.

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ganeshhiyer Sat, 10/18/2008 - 06:23
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hi there,

permission denied problem is basically from tftp server end type.

Not enough space is because of new IOS size is more as that of available space in flash.

what is the name of the tftp software you are using.



wasiimcisco Sat, 10/18/2008 - 09:35
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I have tried with solarwind, 3cdaemon and Cisco TFTP server. I am not having any problem when take the backup of current IOS with all above mention TFTP servers, only when uploading the IOS i m getting following errors,

I have already rmeoved the sdm and other files from Flash now only old IOS left, It should give me erase IOS during copy of new IOS but it didnt.

Amit Singh Sat, 10/18/2008 - 06:40
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  • Cisco Employee,

It looks like that your flash doesnot have enough memory to copy the file. Your options are :

1. Delete the existing IOS in the flash and copy the new one.( risk is involved as if router reloads once the IOS is deleted you will be in mess)

2. Boot the router from the network using the TFTP server and once the router is up and running with the new IOS, you can safely remove the old IOS and copy the new one to the flash.

use the following :

config# boot system tftp://


write memory



-amit singh

jacobuecker Sat, 10/18/2008 - 11:46
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Are you sure that you have the proper permissions to read the file from the TFTP server? Your permissions error may not be related to the Cisco device but to the file on the TFTP server (or location of the file on the server).

vishwancc Sun, 10/19/2008 - 01:28
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Address or name of remote host []?

Source filename []? c2800nm-ipvoice_ivs-mz.124-3g ----->why u are not using .bin here and thats why its saying error opening have you added permission denied or you have added it.

%Error opening tftp:// (Permission denied)




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