From: Shaun Nicholson (Shaun.Nicholson@xxxxxx)
Date: Tue Sep 19 2000 - 13:13:08 GMT-3
I have seen this many times on 4500's and 2500's and found the image to be fine
but the problem was traced to the amount of NVRam.
I did have enougth memory to store the image but it was over two 8Mb chips on a
4500 and it needed like 9Mb so I removed the 2 8's and replaced with one 16Mb
and it worked.
I saw the same with a 2500 and increasing NVRam again worked on that guy.
I cant explain it because I thought 16Mb was 16Mb weather its 2 8 or 1 16 but t
hats how I got around it let meknow if this works for you.
Shaun
smaljure@cibernetworks.com on 09/15/2000 09:47:00 PM
To:
cc: ccielab@groupstudy.com@Internet (bcc: Shaun Nicholson/MD/KAIPERM)
Subject: IOS invalid image..
Hi All
I am trying to copy an IOS image to the flash of a router. I have tried it
several times now. From different sources (including another router's flash)
and everytime, I get the same error message :
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
[OK - 8124000/8388608 bytes]
Verifying checksum... invalid (expected 0x748A, computed 0xEAD8)
Flash copy took 0:05:52 [hh:mm:ss]
r8(boot)#
r8(boot)#sh flash
System flash directory:
File Length Name/status
1 8124000 c2500-js-l_112-19.bin [invalid checksum]
[8124064 bytes used, 264544 available, 8388608 total]
8192K bytes of processor board System flash (Read/Write)
r8(boot)#
The size of the file matches perfectly with the file size in the source
location. But everytime the checksum is failing. Could this be a faulty
flash???? BTW I haven't played around with this router before and hence
never personally seen it boot good from an IOS on the flash.
Please help. What could be causing it?
Thanks
Sanjay
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