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虚拟局域网(VLAN)中,“Trunk”用来描述连接多个VLAN的技术。在技术领域可以翻译为“主干、干线、干道”,不过一般直接用原文。[1]

不使用Trunk情况下,不同的VLAN之间如果有互联需求,每增加一个VLAN时交换机之间就需要增加一条链路,会导致资源浪费。或者在单一链路下,VLAN之间会因为线路冲突而不允许在同一时刻同时传输数据。

为了解决这一问题,将这些数据根据IEEE 802.1Q Tag的格式规范增加一个数据标签“Tag”来区分,这样就能在单一链路下使得VLAN之间的数据帧高效传输而不产生混乱。

这些干道(Trunk)传输技术只能工作在有标签(Tag)标注功能的设备,且这些设备同时支持虚拟网络技术,所以干道(Trunk)通常用来实现路由器交换机防火墙子接口等环节间的互联,而不直接用于连接普通用户设备。[2]

参考资料

[编辑]
  1. ^ TRUNK的作用功能.什么是TRUNK_weixin_30546933的博客-CSDN博客. blog.csdn.net. [2022-02-15]. (原始内容存档于2022-02-15). 
  2. ^ TRUNK 的介绍和配置_道亦的博客-CSDN博客_trunk. blog.csdn.net. [2022-02-15]. (原始内容存档于2022-02-15). 
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