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New Member

Upgrade IOS issue

Hello All,

I was upgrading one of our Companies Cisco 2801 routers today and I ran into an intresting issue. The image I was loading was:

c2801-adventerprisek9-mz.124-5c.bin, and its requirements were 128MB of RAM and 64 MB Flash. I verified this with a show ver, which returned this:

Cisco 2801 (revision 7.0) with 118784K/12288K bytes of memory.

Processor board ID FTX13088R33

2 FastEthernet interfaces

1 Serial interface

1 Virtual Private Network (VPN) Module


DRAM configuration is 64 bits wide with parity disabled.

191K bytes of NVRAM.

62720K bytes of ATA CompactFlash (Read/Write)

However when I boot I recieve these odd messages:

%SYS-3-IMAGE_TOO_BIG: 'flash:c2801-adventerprisek9-mz.124-5c.bin' is too large for available memory (21820700 bytes).

%SYS-6-READ_BOOTFILE_FAIL: flash:c2801-adventerprisek9-mz.124-5c.bin File read failed -- Not enough space.

%SYS-6-BOOT_MESSAGES: Messages above this line are from the boot loader.

boot of "c2801-adventerprisek9-mz.124-5c.bin" using boot helper "flash:c2801-adventerprisek9-mz.124-5c.bin" failed

error returned: File read failed -- Not enough space

loadprog: error - on file open

boot: cannot load "c2801-adventerprisek9-mz.124-5c.bin"

Then it looks like the router decompresses the image one more time and boots normally. Have you guys even seen anything like this?


  • LAN Switching and Routing
Hall of Fame Super Gold

Upgrade IOS issue

Can you try a different IOS?  The one you're using or upgrading to is pretty ancient.

New Member

Upgrade IOS issue

I tried quite a few different IOS images. The one that ended up working with out giving that issue was

c2801-entbasek9-mz.124-5e.bin I think. It was the same revision number just enterprise base instead of advanced enterprise. The reason I have it on such old IOS is because it only have 128MB RAM and 64MB flash. I also need the IP SLA features. Thanks for the help though! If you have any other suggested IOS images that match those feature sets let me know.

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