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Cisco 1720 12.3 firmware upgrade

Posted on 2010-09-23
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What is the highest general release version of Cisco IOS that the 1720 router below will accept?  I've put a show version below.  I've tried c1700-y-mz.123-23 but it tells me there is not enough memory.  When I try to look at the readme files on Cisco's website for the various versions it tells me the Readme files are "Forbidden" even though I am using my Cisco logon ID so I can't look it up myself.  I understand why they won't allow download of firmware but I don't understand why they won't let me view a readme file.  Thanks for the help!

sh ver
Cisco Internetwork Operating System Software
IOS (tm) C1700 Software (C1700-Y-M), Version 12.0(7)T,  RELEASE SOFTWARE (fc2)
Copyright (c) 1986-1999 by cisco Systems, Inc.
Compiled Mon 06-Dec-99 14:14 by phanguye
Image text-base: 0x80008088, data-base: 0x805994D8

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

pdc-rtrgolf uptime is 1 hour, 33 minutes
System returned to ROM by power-on
System image file is "flash:c1700-y-mz.120-7.T"

cisco 1720 (MPC860) processor (revision 0x501) with 18432K/6144K bytes of memory
.
Processor board ID JAD042106MZ (3718208237), 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.
4096K bytes of processor board System flash (Read/Write)

Configuration register is 0x2102
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Question by:eAtlanta
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Expert Comment

by:nutwoo
ID: 33749377
Does it error when you try to copy the new IOS into flash ? Sounds like you may need to free some space.

run
#show flash

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Author Comment

by:eAtlanta
ID: 33749402
I think the version of IOS I'm trying to install is too big for the flash memory this Cisco 1720 has in it, so I need to be able to find out what is the most current IOS version that will fit.
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Expert Comment

by:nutwoo
ID: 33749476
on cisco.com for this the Cisco 1720 it says
'NOTE: This product is no longer being sold and might not be supported'

August 01, 2008
The last date to receive service and support for the product. After this date, all support services for the product are unavailable, and the product becomes obsolete.

http://www.cisco.com/en/US/customer/prod/collateral/routers/ps221/ps223/prod_end-of-life_notice09186a0080147795.html

Latest release
c1700-y-mz.124-25d.bin
Release Date: 24/Aug/2010
Size: 8043.27 KB  (8236308 bytes)
Minimum Memory: DRAM:48 MB  Flash:16 MB

download here

http://tools.cisco.com/support/downloads/go/ImageList.x?relVer=12.4.25d&mdfid=268437925&sftType=IOS+Software&optPlat=&nodecount=2&edesignator=MD&modelName=Cisco+1720+Modular+Access+Router&treeMdfId=268437899&treeName=Routers&modifmdfid=&imname=&hybrid=Y&imst=N&lr=Y


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Author Comment

by:eAtlanta
ID: 33749563
Those are locations where I was trying to view the Readme files that tell me the files are forbidden.  I do know this router is at end of life but as everyone knows, we don't thow out equipment just because Cisco declares it end of life.  I did find this link which allows me to search for info about any release of IOS: http://tools.cisco.com/ITDIT/CFN/jsp/index.jsp 

Based on the info I found there the IOS update I'm trying to install should fit just fine in the router so now I am perplexed.  
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Expert Comment

by:nutwoo
ID: 33749604

Could you post the output from #show flash
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Assisted Solution

by:nutwoo
nutwoo earned 2000 total points
ID: 33749645

from your output above you have;
4096K bytes of processor board System flash (Read/Write)

I'm not sure if that's the total or what you have left. Doesn't look like your flash memory is big enough.
If you send a output of your flash I can confirm.

Latest release
c1700-y-mz.124-25d.bin
Release Date: 24/Aug/2010
Size: 8043.27 KB  (8236308 bytes)
Minimum Memory: DRAM:48 MB  Flash:16 MB

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Author Comment

by:eAtlanta
ID: 33749770
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)

There is nothing in flash right now so I assume if I turn off router before putting a valid IOS file on it then I am dead.  
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Accepted Solution

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nutwoo earned 2000 total points
ID: 33749874
No, you will be fine.
The router does not boot to flash unless you run the boot flash command to install a new IOS.

The flash does look to small. The default in this model is 8MB. looks like some is missing?

Basic boot sequence for a Cisco router

1. The router performs a POST. The POST tests the hardware to verify that all components of the device are operational and present. For example, the POST checks for the different interfaces on the router. The POST is stored in and run from ROM (read-only memory).

2. The bootstrap looks for and loads the Cisco IOS software. The bootstrap is a program in ROM that is used to execute programs. The bootstrap program is responsible for finding where each IOS program is located and then loading the file. By default, the IOS software is loaded from flash memory in all Cisco routers.

3. The IOS software looks for a valid configuration file stored in NVRAM. This file is called startup-config and is only there if an administrator copies the running-config file into NVRAM.

4. If a startup-config file is in NVRAM, the router will load and run this file. The router is now operational. If a startup-config file is not in NVRAM, the router will start the setup-mode configuration upon bootup.


1700 model Hardware - doesn't look like there is a USB port either.
http://www.cisco.com/en/US/docs/routers/access/1700/1720/hardware/notes/1700UMem.html
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Author Comment

by:eAtlanta
ID: 33750118
Actually I wasn't fine as I rebooted and it came up with the error "device does not contain a valid magic number" upon rebooting because there was no image file there.  So I used the TFTP capability (tftpdnld) in ROMMON to TFTP an image up to the router and it worked.  Wish I'd of known I could do it from there earlier as it would have saved me hours.  Note that I installed a 12.2.27 IOS as it was one of the most current that would fit in 4MB of flash.  Router working now.  Thanks for everyones input!!
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Author Closing Comment

by:eAtlanta
ID: 33750131
I was able to update flash IOS to highest level I could find that fit into the flash memory I have in router.  12.3.x will not fit in 4MB flash.  Thanks for help!
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