This paper introduces an innovative concept of smartcard enabled RADIUS server. We design RADIUS servers in which EAP messages are fully processed by smartcards, called EAP-Servers. When the well known TLS protocol is used as authentication method, this architecture becomes scalable. In that case, concurrent authentication sessions are simultaneously handled by different EAP-Servers, each of them securely embeds an unique X509 certificate and its associated private key. We presents experimental results obtained with commercial components, and demonstrate that system performances, about 5 seconds per RADIUS session, are compatible with today network constraints.