Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

Router IOS


I accidentially removed deleted the IOS from a 1700 router, I havent reloaded yet so it's still up and working. Is there anyway I can restore whats been deleted? or do i need to download a replacement IOS and install a replacement IOS.


J Mac

Cisco Employee

Re: Router IOS

Hi Mac,

Once deleted its gone. You can check if your flash space is freed with that much space.

Good you have not reloaded the router yet.

So tftp the new IOS and make sure of your boot path and config reg value.



New Member

Re: Router IOS


Thanks for the advice,

It's a 1700 and this is the output from the show flash.

System flash directory:

File Length Name/status

1 1188 tart

[1252 bytes used, 8387356 available, 8388608 total]

8192K bytes of processor board System flash (Read/Write)

So i guess thats 8Mb right, obviously I try and get the most recent config i can is there anything else i should consider?



Re: Router IOS

You can try udelete command... If you didnt use squeeze command it could be working

check following link:



Re: Router IOS

Hi Mac,

Check whether any IOS is present in flash using sh flash command.If there is no file then it would be better download the IOS and load it using tftp procedure.

Before reloading the router make sure that the config register value should be 0x2102.



New Member

Re: Router IOS

Thanks for all your help on this, i don't seem to have the undelete command available but it was worth a try. thanks again.

New Member

Re: Router IOS


I have got this IOS from Cisco

File name - c1700-y-mz.122-17f.bin

Min. Memory - 8


Min. Memory - 24


This is the output from a show version on the router -

Cisco Internetwork Operating System Software

IOS (tm) C1700 Software (C1700-Y-M), Version 12.1(5), RELEASE SOFTWARE (fc1)

Copyright (c) 1986-2000 by cisco Systems, Inc.

Compiled Tue 24-Oct-00 23:58 by cmong

Image text-base: 0x80008088, data-base: 0x805E2234

ROM: System Bootstrap, Version 12.0(3)T, RELEASE SOFTWARE (fc1)

xxxxxx uptime is 25 weeks, 1 hour, 43 minutes

System returned to ROM by power-on

System image file is "flash:c1700-y-mz_121-5.bin"

cisco 1720 (MPC860) processor (revision 0x601) with 24576K/8192K bytes of memory


Processor board ID JAD0606009D (1781301420), with hardware revision 0000

M860 processor: part number 0, mask 32

Bridging software.

X.25 software, Version 3.0.0.

1 FastEthernet/IEEE 802.3 interface(s)

1 Serial(sync/async) network interface(s)

32K bytes of non-volatile configuration memory.

8192K bytes of processor board System flash (Read/Write)

Configuration register is 0x2102

Will this config be ok to TFTP?

Re: Router IOS

Yes, You will be good to go with this. Just tftp it to the router and set the boot path to boot form the file, wr mem and you are good to go.

TFTP server to download


-amit singh

New Member

Re: Router IOS

Thanks alot.

CreatePlease login to create content