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New Member

3640 IOS


I hv one 3640 i upload the IOS through rommon mode successfully.

now when i do the

Router#sh flash

System flash directory:

No files in System flash

[0 bytes used, 4194304 available, 4194304 total]

4096K bytes of processor board System flash (Read/Write)

it gives the above message about IOS

as wht i understand from above that if i reload the router now it definetly doesnt comes up.

Wht shall i hv to do to rectify the same.


Re: 3640 IOS

Hi Parvinder

Do make use of TFTP copying to copy the required IOS code onto your flash.

Once you are done with that do define the boot loader(boot system command) statement pointing the ios code file saved in your flash.

After doing the same make sure you have both the ios code in flash as well as your boot system command appears in your config.

Also make sure that you have correct config register value set in your config..


Re: 3640 IOS


can you share "show version" of this router with us?

New Member

Re: 3640 IOS

Router#sh ver

Cisco Internetwork Operating System Software

IOS (tm) 3600 Software (C3640-I-M), Version 12.2(17a), RELEASE SOFTWARE (fc1)

Copyright (c) 1986-2003 by cisco Systems, Inc.

Compiled Thu 19-Jun-03 11:25 by pwade

Image text-base: 0x60008930, data-base: 0x60A36000

ROM: System Bootstrap, Version 11.1(20)AA1, EARLY DEPLOYMENT RELEASE SOFTWARE (f


Router uptime is 3 hours, 6 minutes

System returned to ROM by power-on

Running default software

cisco 3640 (R4700) processor (revision 0x00) with 28672K/4096K bytes of memory.

Processor board ID 12906756

R4700 CPU at 100Mhz, Implementation 33, Rev 1.0

Bridging software.

X.25 software, Version 3.0.0.

2 Ethernet/IEEE 802.3 interface(s)

2 Serial network interface(s)

8 Low-speed serial(sync/async) network interface(s)

DRAM configuration is 64 bits wide with parity disabled.

125K bytes of non-volatile configuration memory.

4096K bytes of processor board System flash (Read/Write)

Configuration register is 0x3922

Re: 3640 IOS

The loaded IOS image is running from RAM

Current boot field value is 0010 (default).

This causes the system to boot the image from default boot filename "cisco2-3600" if boot from flash fails, in your case there is no IOS inflash:

Enabling the boot system command override the default filename for booting over the network from a TFTP server.

As mentioned in earlier post, you need to upload IOS in flash from TFTP and then set the boot system command to allow router to boot from flash:

hope it helps .... rate if it does ...