By default, your ASA ships with a license already installed. This license might be the Base License, to which you want to add more licenses, or it might already have all of your licenses installed, depending on what you ordered and what your vendor installed for you. You can have one permanent activation key installed. The permanent activation key includes all licensed features in a single key. If you also install time-based licenses, the ASA combines the permanent and time-based licenses into a running license.

In addition to permanent licenses, you can purchase time-based licenses or receive an evaluation license that has a time-limit. For example, you might buy a time-based An圜onnect Premium license to handle short-term surges in the number of concurrent SSL VPN users, or you might order a Botnet Traffic Filter time-based license that is valid for 1 year. You can install multiple time-based licenses, including multiple licenses for the same feature. However, only one time-based license per feature can be active at a time. The inactive license remains installed, and ready for use. For example, if you install a session An圜onnect Premium license, and a session An圜onnect Premium license, then only one of these licenses can be active. If you activate an evaluation license that has multiple features in the key, then you cannot also activate another time-based license for one of the included features. For example, if an evaluation license includes the Botnet Traffic Filter and a session An圜onnect Premium license, you cannot also activate a standalone time-based session An圜onnect Premium license. The timer for the time-based license starts counting down when you activate it on the ASA. If you stop using the time-based license before it times out, then the timer halts. The timer only starts again when you reactivate the time-based license. If the time-based license is active, and you shut down the ASA, then the timer stops counting down.

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