If you've been following the Implementation Roadmap you'll have seen the links to the material in the eduroam Group area! - otherwise:

FreeRADIUS web site guide for a basic configuration to support eduroam

FreeRADIUS web site guide to logging in an eduroam environment

FreeRADIUS Best Current Practice Configuration

FreeRADIUS Packet Handling - examining the flow

FreeRADIUS Demystified NWS 40

Connecting FreeRADIUS to AD and LDAP User Database - Geant Best Practice guide (2013)