Cisco Cisco IOS Software Release 12.4(4)T

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 a specific set of 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.

The feature set tables have been removed from the Cisco IOS Release 12.4T release notes to improve the 
usability of the release notes documentation. The feature-to-image mapping that was provided by the 
feature set tables 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). Under the release section, 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 frequently asked questions about Cisco Feature Navigator, see the FAQs at the following URL:

To determine which software images (feature sets) in Cisco IOS Release 12.4T support a specific 
feature, go to the Cisco Feature Navigator home page and perform

 

the following steps.

From the Cisco Feature Navigator home page, click Search by feature.

To find a feature, use either “Search by full or partial feature name” or “Browse features in alphabetical 
order.” Either a list of features that match the search criteria or a list of features that begin with the 
number or letter chosen from the ordered list will be displayed in the Features available text box on the 
left side of the web page. 

Choose a feature from the Features available text box, and click the Add button to add a feature to the 
Features selected text box on the right side of the web page. 

To learn more about a feature in the list, click the Show Description(s) button below the Features 
available 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.