To clear an active permanent license from the Cisco 1900 series, 2900 series, and 3900 series routers, perform the following steps:

Step 1. Disable the technology package.

Router(config)# license boot module module-name technology-package package-name disable

Step 2. Clear the license.

Router# license clear feature-name

Router(config)# no license boot module module-name technology-package package-name disable

Note: Some licenses, such as built-in licenses, cannot be cleared. Only licenses that have been added by using the license install command are removed. Evaluation licenses are not removed.

Figure 1 shows an example of clearing an active license.

Use the Syntax Checker in Figure 2 to uninstall the security license on router R2.