Use “fast reconnect” to speed up repeat authentication requests

Hi, Alan and team! In your article https://networkradius.com/articles/2020/12/10/design-blueprint-for-universit... you describe  the fast reconnect approach for universities. I was going to give it try but haven't found any docs describing how to do that. Or is this a solution you offer on a commercial base? Thanks for your help Regards Uwe