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Cisco 2911 IOS Upgrade Error

I'm trying to tftp new IOS to 2911 router but I keep getting this error:

%Warning: File not a valid executable for this system

 

This is the IOS I am trying to load: c2900-universalk9-mz.SPA.152-4.M6a.bin

 

Anyone encountered this before?

 

4 REPLIES
Hall of Fame Super Gold

Never seen this error message

Never seen this error message before.  Did you try to compare the MD5 hash value?

Ok so weirdest thing.  It

Ok so weirdest thing.  It wouldn't work from the LAN, but I was able to load it over the WAN.  Took forever but once it was on the router I set the router to boot from the new image, router came back online with the new image successfully.

 

 

Cisco Employee

I tried to download an image

I tried to download an image of router 1841 on router 2851 and getting same error. Please check if you are downloading a valid file. If that does not help, please upload show tech of the router.

R11_2851#copy tftp flash:                
Address or name of remote host [10.76.76.160]? 
Source filename [c1841-advsecurityk9-mz.124-24.T5]? c1841-advsecurityk9-mz.124-24.T5.bin
Destination filename [c1841-advsecurityk9-mz.124-24.T5.bin]? 
Accessing tftp://10.76.76.160/c1841-advsecurityk9-mz.124-24.T5.bin...
%Warning: File not a valid executable for this system
Abort Copy? [confirm]
R11_2851#

It definitely is a valid IOS,

It definitely is a valid IOS, it is for Cisco 2911 and is Cisco suggested.  I have loaded it up on other 2911's as well.
 

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