Comments on: Upgrade Cisco IOS in a Router or a Switch

By: Nobo

Nobo — Mon, 07 Feb 2011 10:48:25 +0000

use command
switch#dir
to list flash: -content.
If there is enough of room for two IOS images, then you can, by all means have two IOS images running on same switch.

If you want to go for the older IOS image use boot system command to do that. First list your running boot settings
switch#sh boot
BOOT path-list : flash:c2960-lanbasek9-mz.122-53.SE2/c2960-lanbasek9-mz.122-53.SE2.bin

then you can change it to different image and keep the current as backup..

switch#configure terminal
switch(config)#boot system flash:c2960-lanbase-mz.122-35.SE2/c2960-lanbase-mz.122-35.SE2.bin;flash:c2960-lanbasek9-mz.122-53.SE2/c2960-lanbasek9-mz.122-53.SE2.bin

as an example.. Assuming that you have two different directories in flash: called:
c2960-lanbase-mz.122-35.SE2
and
c2960-lanbasek9-mz.122-53.SE2

and that those both house refered ios image file (.bin)
c2960-lanbase-mz.122-35.SE2.bin @ flash:/c2960-lanbase-mz.122-35.SE2
etc.

Why would you not use Cisco Network Assistant to upgrade IOS? It makes it easy as what..

By: deimos3428

deimos3428 — Fri, 01 Oct 2010 15:22:02 +0000

@shrijan: The reason you need to erase the flash is that it typically isn’t large enough to hold two system images.

By: shrijan

shrijan — Thu, 23 Sep 2010 04:31:50 +0000

The steps are really appreciable. After upgraded I have few more things that I’m not satisfied:
product:catalyst cisco 3560 series
IOS ver before : 12.2(44)SE5
IOS ver after: 12.2.(55)SE
when I access the new upgraded IOS from the browser, I didnt find the IOS upgrade options, details of switch like its current IOS, model no. and etc that used to diplay in previous IOS..
So, for the basic and important features like I have mentioned above in the cisco switch new latest upgraded one is not user frendly.
So my concerns:
1. To find the old versions features like I have mentioned above do I need to downgrade the IOS?
2. To downgrade from CLI you have mentioned to erase flash first. Erase flash means delete all the current configurations. Is there any way to downgrade the IOS and not loosing of current configurations?

shrijan

By: Inam Khan

Inam Khan — Tue, 27 Apr 2010 09:32:31 +0000

Many Thanks it works for me.

By: Virender Singh Negi

Virender Singh Negi — Sun, 03 May 2009 15:34:01 +0000

Yes I got my switch ios upgraded.

Thanks a lot.

Virender S. Negi

By: Adam

Adam — Wed, 29 Apr 2009 19:45:10 +0000

@Gabriel Garcia

It is the same to downgrade except for one thing
You have to run the command erase flash: to remove the current IOS before loading the new/old one.

What kind of problems are you having with the newer IOS that would make you want to downgrade?

Adam

By: Gabriel Garcia

Gabriel Garcia — Fri, 23 Jan 2009 17:09:40 +0000

Hi, the procedure is great, I have done it.
But to “Downgrade”, is the same procedure???. For instance, I have a Switch 4510, I have found the procedure to upgrade the ios, but I’ll need to downgrade it.

I would thank and rapid answer.

Thank you

By: Morefyah27

Morefyah27 — Fri, 21 Nov 2008 05:50:51 +0000

Absolutly AMAZING instructions!!!Seamless and exact. I got my ROuter upgraded and reconfigured in minutes.

Thanks a million.
Morefyah27

By: rajendra

rajendra — Sat, 04 Oct 2008 11:26:16 +0000

i wannt upgrade my router ios