千兆以太网越来越得到认可,第三层交换机的需求越来越大,已经成为局域网中的核心设备,并在大中型网络中的汇聚层、中小型网络的骨干层占有不可或缺的地位。正如路由器在统治着广域网一样,第三层交换机将成为局域网中的统帅。本文分为知识普及、选型指南、厂商观点和方案分析等4部分,希望呈现给读者一份三层交换的可口大餐。 Gigabit Ethernet is more and more recognized, the growing demand for Layer 3 switches, has become the core of the LAN equipment, and convergence layer in large and medium-sized networks, the backbone of small and medium-sized network occupy an indispensable status. Just as the router dominates the WAN, Layer 3 switches will become the masters of the LAN. This article is divided into four parts: knowledge popularization, selection guide, vendor viewpoint and program analysis, and so on. Hope to present to readers a three-tier exchange of delicious feast.