From: Raymond Jett (rajett@xxxxxxxxx)
Date: Fri Jul 19 2002 - 15:38:57 GMT-3
Sounds like you put in a double-sided 8Mb flash simm...
2500 series routers will NOT support double-sided 8Mb flash simms.
It will show the 16Mb of flash, but when it goes to write to the simm, it
will write to the first bank of 4Mb, then will overwrite the first bank
again, rather than write to the 2nd bank of 4Mb...
Do a 'sho flash all' and make sure that all of the chips are of type
'29f016' (or at least end with 016)... if they show up as ending in 08, then
you have a double-sided 8Mb simm.
Raymond
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Bhisham Bajaj
Sent: Friday, July 19, 2002 1:19 PM
To: ccielab@groupstudy.com
Subject: invalid checksum
I have a 2509 router with 8mb flash
So to run the 12.1 ios I got another 8 MB flash
Now my router has 16mb (8+8)
I have downloaded a ios c2500-js-l.121-2.T.bin
Release -------------------12.1
Description-------------- ENTERPRISE PLUS
Size ----------------------14553920
BSD Checksum-------- 59411
Router Checksum------ 0x8da5
MD5
----------------------c792d6e494e863ca2ba97438cdf90b9c
Date Published: ----------22-MAY-2000
Now when I put this file in my router it shows that
the file size is the same as what is on cisco site
But it gives me a invalid checksum
I was just thinking has this got to do any thing with
having two flash chips (8+8)
I have not made any partition and other ios do not
give me this problem but the other ios is just 7 Mb
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!
[OK - 14553920/16777216 bytes]
Verifying checksum... invalid (expected 0x8DA5,
computed 0x1402)
Flash copy took 0:09:35 [hh:mm:ss]
R1(boot)#sh flash
System flash directory:
File Length Name/status
1 14553920 c2500-js-l.121-2.T.bin [invalid
checksum]
[14553984 bytes used, 2223232 available, 16777216
total]
16384K bytes of processor board System flash
(Read/Write)
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