which is the best RADIUS server for 802.1x wired authentication?
My personal choice is the FreeRADIUS server for Linux. Please note, however, that there is no "best" server for 802.1x authentication. Any RADIUS server capable of authenticating users using appropriate authentication mechanism is fine. Because all RADIUS servers must support the basic RADIUS protocol, any RADIUS server is fine as long as it meets your requirements for authentication types, convenience of management etc.
The FreeRADIUS is not exactly the easiest server to manage as it is quite a complex piece of software. However, it is often used even in service provider environment so it is certainly capable of meeting your requirements.
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 custome...