中文摘要：

网络交换设备的可重构性越来越受到人们关注，基于ForCES路由器体系架构，作为ForCES路由器软件的重要组成部分，文章提出了一种可扩展的LFB管理及开发模型。首先提出并叙述了ForCES路由器软件结构，在此基础上，详细介绍了可扩展的LFB管理及开发模型的结构，最后为验证该模型，给出了一个实现方法，并评估了该模型的相关性能。

英文摘要：

Extensible software architecture is needed to adapt to the development of router. As an important part of ForCES router software, an extensible LFB manage ment and development model based on ForCES router software was illustrated, which enhances extensibility of the software. The ForCES router software structure was first discussed. Based on that, the architecture of this model was described. In order to testify this model, an implementation was presented, and the related per- formance is evaluated.