From: Jay Hennigan (jay@west.net)
Date: Sat Apr 12 2003 - 02:10:03 GMT-3
On Fri, 11 Apr 2003, songsrong wrote:
> I am upgrading the IOS (12.2 code) on a cisco 2503. I got the "invalid checksum" every time when I finished the download.
> The router has 16M flash as displayed below:
>
> r2-2503(boot)#sh flash
>
> System flash directory:
> File Length Name/status
> 1 16505800 c2500-jk8os-l.122-1d.bin [invalid checksum]
> [16505864 bytes used, 271352 available, 16777216 total]
> 16384K bytes of processor board System flash (Read/Write)
>
> I have used different TFTP servers for the upgrade. If I only upgraded the IOS which was less than 8 M, there was no problem.
>
> I can not upgrade the code bigger than 8M at all, even some of the IOS are 14M or 13M. Can someone help?
Try "show flash chips" and make sure that you really have two 8M sticks.
There's a trick whereby you can load one 8 and one 4 to get 12, but IOS
will report 16.
If both sticks are really 8 and identical, swap them and try to load an
image of 8M or less. Sounds like you might just have a bad stick in the
second slot.
It could also just be bad contact. Sometimes removing and reseating will
fix it.
-- Jay Hennigan - CCIE #7880 - Network Administration - jay@west.net NetLojix Communications, Inc. - http://www.netlojix.com/ WestNet: Connecting you to the planet. 805 884-6323
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