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image loading problem on router 3640

I have Cisco 3640 Router and have a problem when the router boots it shows an error message and the router enters the rommon mode.

Here is the error message:

System Bootstrap, Version 11.1(20)AA2, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1)

C3600 processor with 16384 Kbytes of main memory

Main memory is configured to 32 bit mode with parity disabled

ERROR: Illegal system memory (DRAM) configuration.

The current system memory configuration is:

SIMM 0 SIMM 1 SIMM 2 SIMM 3

--------------------------------------

32M-DUAL

Use "meminfo -l" to see the valid configurations.

ERROR: Illegal system memory (DRAM) configuration.

The current system memory configuration is:

SIMM 0 SIMM 1 SIMM 2 SIMM 3

--------------------------------------

32M-DUAL

Use "meminfo -l" to see the valid configurations.

Unable to boot due to illegal DRAM configuration ? aborting

rommon 1 > meminfo -l

Supported 64 bit configurations:

SIMM 0 SIMM 1 SIMM 2 SIMM 3

--------------------------------------

4M 4M 4M 4M

8M 8M

8M-DUAL 8M-DUAL

8M 8M 4M

8M-DUAL 8M-DUAL 4M 4M

8M 8M 8M 8M

8M 8M 8M-DUAL 8M-DUAL

8M-DUAL 8M-DUAL 8M 8M

8M-DUAL 8M-DUAL 8M-DUAL 8M-DUAL

16M 16M

16M 16M 4M 4M

16M 16M 8M 8M

16M 16M 8M-DUAL 8M-DUAL

16M 16M 16M 16M

32M-DUAL 32M-DUAL

32M-DUAL 32M-DUAL 4M 4M

32M-DUAL 32M-DUAL 8M 8M

32M-DUAL 32M-DUAL 8M-DUAL 8M-DUAL

32M-DUAL 32M-DUAL 16M 16M

32M-DUAL 32M-DUAL 32M-D

Supported 32 bit configurations:

SIMM 0 SIMM 1 SIMM 2 SIMM 3

--------------------------------------

4M

4M 4M

4M 8M

4M 16M

4M 4M 4M

4M 4M 8M

8M

8M 4M

8M 16M

8M 8M 4M

8M 8M 8M

8M 8M 16M

8M 8M 4M 8M

8M 8M 8M 4M

16M

16M 4M

16M 8M

16M 16M 4M

16M 16M 8M

16M 16M 16M

16M 16M 4M 8M

16M 16M 4M 16M

16M 16M 8M 4M

16M 16M 8M 16M

16M 16M 16M 4M

16M 16M 16M 8M

rommon 2 >

I tried 2 other DRAMs from another working router and the same error message appeared, note that this router was previously working properly.

So please do you have any idea about what could fix this problem.

1 REPLY

Re: image loading problem on router 3640

Hello,

make sure that your DRAM banks are filled according to the table in this link (scroll down to 'Table 3 32-Bit DRAM Configuration for Cisco 3640 Routers'):

http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis3600/hw_inst/hw_notes/3636mem.htm#wp103695

Regards,

GNT

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