Cisco Cisco IOS Software Release 12.4(23)

Cisco IOS software is packaged in feature sets that consist of software images that support specific 
platforms. The feature sets available for a specific platform depend on which Cisco IOS software images 
are included in a release. Each feature set contains specific Cisco IOS features.

Cisco IOS images with strong encryption (including, but not limited to 168-bit [3DES] data encryption 
feature sets) are subject to U.S. government export controls and have limited distribution. Strong 
encryption images to be installed outside the United States are likely to require an export license. 
Customer orders may be denied or subject to delay because of U.S. government regulations. When 
applicable, the purchaser/user must obtain local import and use authorizations for all encryption 
strengths. Please contact your sales representative or distributor for more information, or send an e-mail 
to export@cisco.com.

Feature-to-image mapping is available through Cisco Feature Navigator. Cisco Feature Navigator is a 
web-based tool that enables you to determine which Cisco IOS software images support a specific set of 
features and which features are supported in a specific Cisco IOS image. You can search by feature or 
by feature set (software image). You can compare Cisco IOS software releases side-by-side to display 
both the features unique to each software release and the features that the releases have in common. 

Cisco Feature Navigator is updated regularly when major Cisco IOS software releases and technology 
releases occur. For the most current information, go to the Cisco Feature Navigator home page at the 
following URL:

For help with Cisco Feature Navigator, see the help information at the following URL:

To determine which software images (feature sets) in a Cisco IOS release support a specific feature, go 
to the

 

the following steps.

From the Cisco Feature Navigator home page, click Research Features.

Select your software type or leave the field as “All”. 

To find a feature, you can search by either Feature or Technology (select the appropriate button). If you 
select Search by Feature, you can further filter your search by using the Filter By text box. 

Choose a feature from the Available Features text box, and click the Add button to add the feature to the 
Selected Features text box. 

To learn more about a feature in the list, click the View Desc button in the Available Features 
text box.

Repeat this step

 

to add features

. 

A maximum of 20 features can be chosen for a single

 

search. 

Click Continue when you are finished choosing features.