基于Hybrid Port的VLAN实现

VLAN具有控制网络广播风暴、保障网络安全和简化网络管理等特点，因此在局域网中得到广泛的应用。在某些场合下必须允许特定VLAN之间相互访问，通常实现方式是划分IP子网并通过IP进行路由。但是在某些特定的场合中，由于IP紧缺以及保障IP真实等原因，不能采取这样的方案。为此本文提出了一种基于混杂端口（hybrid port）的虚拟局域网（VLAN）实现方案。通过这种方式设计，在提高网络安全性的同时，避免了IP地址紧缺的问题。最后给出了基于混杂端口VLAN设计方案。

A VLAN Implementation Based on Hybrid Port

VLAN has many virtues,for example controlling the network broadcasting storms,insuring the security of network and simplifying the management of network,so VALN are popular used in LAN.In some occasion,two different VLAN access each other must be allowed,the usually way is to split the IP address and route the IP.But in some special occasion, the way is denied because of it scarcity and truth.The paper proposes an implementation of VLAN plan based on the hybrid port.On this way, it not only improves the network security,but also resolves problem of the IP address scarcity.At last a sample of VLAN that based on hybrid port is given.