华三交换机为vlan设置描述字符有什么作用?请大神指导

2025-03-15 13:27:51
推荐回答(1个)
回答1:

可管理的交换机都有对端口的描述字符串,无论是物理端口还是虚拟端口(vlan)。大多数人都会忽略这个描述,因为description本身对设备运行没有任何影响。但资深网络管理员通常会用它来简单描述这个端口的作用域(用途、连接对象等)。对于需要管理几十甚至上百台交换机的管理人员来说,好的或者较为一致的描述字可以快速定位设备的物理位置。
比如一台三层交换机,其物理端口中既有上联路由器的端口,也有下联若干交换机或其他三层交换机的端口,那么简单的描述就很容易分清那个端口连接的是一层楼的,那个是五层楼的。同样,对vlan的描述可以很方便的区分那个是财务网段,那个是人事网段的。
可能有人会觉得有了名字(name),则描述(description)显得有点多余,实际上也的确如此,只不过描述通常允许更丰富的内容。
vlan中编号、名称、描述,这三个端口表示的要素实际上继承于物理端口的各项属性,只不过对物理端口的访问要通过名称进行,而对vlan的访问则只能对编号进行。只是因为vlan是由用户建立的,所以这三者都能通过命令可见,而物理端口的编号和名称都是由厂家预制的,一般人甚至无法看到物理端口的编号(可通过snmp读出),但其内部的最终实现都是通过编号来完成的,所以vlan的配置是直接用编号而非绕到名称再映射编号来进行。

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