Cisco 7500 Series Routers

8 MB Flash Memory on the 7500 RSPs Cannot Load Large Boot Images

November 18, 2000

Products Affected




The Top Assembly Number (TAN) is 800-08-478-01 and is on a sticker on the back of the board. This is the only assembly number affected.


All RSP4=


All RSP2=


All RSP1=


All RSP7000=

Problem Description

Boot Flash image sizes are surpassing the limit of the 8 MB Flash memory SIMM that is supplied in the RSP4+, RSP4, RSP2, RSP1 and RSP7000. As a result, devices with an 8 MB Flash memory SIMM are unable to store some of the newer, larger Cisco IOS® boot images, such as the Cisco IOS Software Release 12.1(4.4)T2 and 12.1(5)T images. Future boot images that surpass the 8 MB Flash memory SIMM size, as well as releases later than Cisco IOS Software Release 12.1(4.4)T2 and 12.1(5)T on the T train, are also included in this category.

Note:?The RSP8 has 16 MB of Flash memory and does not encounter this problem.


The formatted capacity of the 8 MB Flash SIMM that is used on the 7500 platform is 7.7 MB. This memory SIMM is used to store the boot Flash image. The first boot images to surpass this size limitation are the Cisco IOS Software Release 12.1(4.4)T2 and 12.1(5)T images, as well as later images.

Problem Symptoms

The main symptom is that the size of the boot image is over 7.7 MB. If you try to download an image larger than 7.7 MB, you see this:

Router# copy tftp bootflash:
Address or name of remote host []?
Source filename [rsp-boot-mz.121-4.4.T2]?
Destination filename [rsp-boot-mz.121-4.4.T2]?
Accessing tftp://
Loading rsp-boot-mz.121-4.4.T2 from (via Ethernet0/0): !
%Error copying tftp:// (Not enough space on device)

7602176 bytes available (0 bytes used)

These outputs are from the directory bootflash: and show bootflash: commands:

Router# dir bootflash:
Directory of bootflash:/

1 -rw- 3723 Jun 12 2000 16:41:52 conf
2 -rw- 188612 Jun 30 2000 15:39:55 crashinfo_20000630-153955
3 -rw- 5759676 Oct 11 2000 23:08:24 rsp-boot-mz.120-13.3.S

7602176 bytes total (1649780 bytes free)

Router# show bootflash:
No files on device

Use the show version command to determine the size of the Flash memory on your device. This is an example of an 8 MB Flash memory card output:

Router# show version
20480K bytes of Flash PCMCIA card at slot 0 (Sector size 128K).
8192K bytes of Flash internal SIMM (Sector size 256K).


Workaround/Solution for the RSP7000, RSP1, RSP2, RSP4 and RSP4+

There are two workaround solutions for this problem. The first is to use the Cisco IOS Software Release 12.0(13)S rsp-boot-mz image, which is less than 7.7 MB in size. The second is to load the boot image onto the Flash PC card, and then change the configuration so the device retrieves the boot image from that location.

For example, copy the image to the Flash PC card:

Router# copy tftp slot0: 
  Enter source file name: rsp-boot-mz.121-5.T.bin 

  7995264 bytes available on device slot0, proceed? [confirm] 

  Address or name of remote host []?

  Accessing file "rsp-boot-mz.121-5.T.bin" on ...FOUND Loading 

  rsp-boot-mz.121-5.T.bin from (via Ethernet1/0): !!!!!!!!!

  [OK - 6881352/13762560 bytes] CCCCCCCC

To retrieve the boot image from the Flash PC card, use this command:

  • boot bootldr slot0:rsp-boot-mz.12.1-5.T.bin

Additional Workaround/Solution for the RSP4+

In the very near future, manufacturing will make the 16 MB Flash SIMM the default choice for all RSP4+. This memory component is still being qualified on the device, so the default change has not been implemented yet. After the qualification process has been completed, there will be an upgrade for the RSP4+ in the field on an as-needed basis.

Note:?This memory is currently on allocation and every effort is being made to get the upgrade program in place quickly. Refer to this field notice for updates.


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RSP bootflash area is too small for new boot images.

For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods:

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