Cisco IOS 2851 - Last version upgrade

[after]

Hello, I am pretty new to this community but I'm slowly preparing for my CCNA exam. I have a 2851 router for which I would like to upgrade to the last IOS available. Of course I know that is pretty old but I would like to use the best of it. From were I could take it because on the official website is retired and nothing in downloads section?

Currently is running "Version 12.4(24)T8"

Thank you for any help!

[Leo Laohoo · Accepted solution]

Only those with a valid Service Contract can download the firmware.  

What happens if someone enters the complete filename into a web browser?  

[after]

Hi Leo,

Indeed I'm able to find

c2800nm-advipservicesk9-mz.151-4.M1.bin

which I think it should be one of the latest IOS but usually I prefer to download from official websites. But maybe is just fine and I will not have problems.

Thanks for your reply!

[johnlloyd_13]

hi,

it should be fine. just ensure you've got enough space in the router's flash (CF card).

you can check by issuing a

dir or show flash

enjoy studying/labing and good luck in your CCNA!

[after]

Hi john,

Thanks for your reply.

I would like to know what is the difference between these .bin files:

adventerprisek ; advipservices ; advsecurity ; entbase ; ipbase ; ipvoice and spservices.

[Joseph W. Doherty]

Quite a bit.  In the older ISRs, Cisco provided different .bin files to support different feature sets.  For basic features, there's much overlap between them, but for advanced features, different .bin will have feature unique to them.  However, I recall (?) some of the "advanced" feature sets include all the features from the other advanced or unique feature sets (for example, adventerprise might be an all features IOS .bin).

Within the feature sets, often there was a non-encryption/weak-encryption version and a high-encryption (no export) version too.

There is (or at least was) a Cisco on-line tool where you could compare features between different IOS versions.

BTW, newer platforms tend to use a "universal" IOS .bin, but with licensing required to enable specific feature sets.

[after]

Thank you all for your time to answer my questions.