IPv6隧道代理机制是一种重要的IPv4/IPv6过渡技术,但存在不足和不够完善的地方.首先,它不支持NAT(网络地址翻译)用户;其次,该机制没有为实现隧道服务器负载均衡提供一种具体的调度方案。本文修改了代理服务器和隧道服务器的功能,解决了其不支持NAT用户的问题;并提出一种加权最少隧道调度算法,仿真实验表明它比通用调度算法更有效地实现了隧道服务器负载均衡.
IPv6 Tunnel Broker is one of important mechanisms of transition from IPv4 to IPv6. However, This mechanism does not support NAT users,also not specific a way to balance the load of tunnel servers. The function of Broker Server and Tunnel Server is modified to support NAT users. Meanwhile, a new dispatching method is proposed for balancing the load between tunnel servers. Simulation result shows that the method has better performance than other general dispatching methods have.