Through analyzing main wire and wireless broadband access technologies: Web, PPPoE(Point-to-Point Protocol over Ethernet), IEEE 802.1X,IEEE 802.11i and IEEE 802.16, we find that different internet access technology uses different AAA (Authentication,Authorization,Accounting)system which can not make efficient utilization of the network resources, optimize operational networks, integrate user's databases, and also can not provide uniform billings, do business analysis for users. Consequently, a platform suitable for integrated broadband access draws people's much attention. The author attended iBAC(integrated Broadband Access Controller) project putting forward improvements on providing wire and wireless integrated broadband access under IPv6 environment for CNGI(China Next Generation Internet), designed and made RADIUS(Remote Authentication Dial In User Service) client based on wire and wireless integrated broadband access realistic on platform of Real-Time Linux.