The reconstruction of fiber main network system of Liuzhou I. &S.Group Co.Ltd. was conducted by using the Ethernet technology, sub-network and analogue network technology and level switch technology.

• 摘要利用千兆以太网技术、子网及虚拟网络技术和层交换技术改造柳州钢铁（集团）公司的光纤主干网络系统。