The IOS upgrade/downgrade does not change the license feature set that you have currently install on your switch if you are reffering to the license, the only thing is the differences between the IOS versions that you will use.
For example if you are using an universal image this one contains all feature packages: LAN Base, IP Base, and Enterprise Services feature sets. The level of functionality available is determined by the license applied to the device. A software activation license (SAL) enables specific functionality. For example, an IP Base package license enables IP Base functionality in the Cisco IOS Software universal image.
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...