What happen when the CNP license is expired?

Zyxel_JoyLee

When a CNP license expires, your Zyxel device will still function, but you will lose access to all features that require a specific license.
Features that require a license are indicated by a diamond icon. For example, if you have a Professional pack license and have used a feature like IP & Routing, you will no longer be able to access the page to make adjustments after the Pro pack expires.
To continue using these features, you will need to purchase a new license. You can purchase a new license through the Zyxel Marketplace.