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New Member

IOS Image Selection help

I have 1800 series router. I need some assistance to download the IOS image from the Cisco website. Under download we have the option 1811 and 1812 Integrated Service router. Which image should I select? Is it under 1811 or 1812? Shoe version output is given below.


RTR#show version

Cisco IOS Software, C181X Software (C181X-ADVIPSERVICESK9-M), Version 12.4(11)T2, RELEASE SOFTWARE (fc4)

Technical Support:

Copyright (c) 1986-2007 by Cisco Systems, Inc.

Compiled Mon 30-Apr-07 14:36 by prod_rel_team

ROM: System Bootstrap, Version 12.3(8r)YH8, RELEASE SOFTWARE (fc2)

RTR uptime is 21 hours, 3 minutes

System returned to ROM by reload at 22:21:31 JST Wed Apr 8 2009

System image file is "flash:c181x-advipservicesk9-mz.124-11.T2.bin"

This product contains cryptographic features and is subject to United

States and local country laws governing import, export, transfer and

use. Delivery of Cisco cryptographic products does not imply

third-party authority to import, export, distribute or use encryption.

Importers, exporters, distributors and users are responsible for

compliance with U.S. and local country laws. By using this product you

agree to comply with applicable laws and regulations. If you are unable

to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:

If you require further assistance please contact us by sending email to

Cisco 1812-J (MPC8500) processor (revision 0x400) with 118784K/12288K bytes of memory.

Processor board ID FHK110918RZ, with hardware revision 0000

10 FastEthernet interfaces

1 ISDN Basic Rate interface

31488K bytes of ATA CompactFlash (Read/Write)

Configuration register is 0x2102


Re: IOS Image Selection help

In your output you can see Cisco 1812-J (MPC8500) processor .. So I would go for 1812

and also all 1800s have ISDN BRI dial backup, except the 1811, which uses V.92 analog modem dial backup instead


your output saying it has 1 ISDN BRI so its 1812

New Member

Re: IOS Image Selection help

I downloaded the latest image which is of 23MB in size. My routers flash size is 32MB

and I cannot upload the image thru Cisco Network Assistant. It says the image cannot be uploaded even with the current image deletion. How do I proceed?

Re: IOS Image Selection help

Hi, Avil

Can you use TFTP instead of Cisco Network Assistant?




Re: IOS Image Selection help

I have never worked with cisco assistant but I would try TFTP

here is guide


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