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ROS3.30视频教程集萃（从入门到精通）
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（基础篇）
【第十三课】 vlan
什么是vlan？虚拟局域网，注意一个vlan中的所有的主机都不能与另外一个vlan中的任何主机通信，如果要进行通信，必须有路由。
Ros中vlan如何操作？
官方原话：
Vlan is an implementation of the 802.1Q vlan protocol for mikrotik routeros，it allows You to have multiple virtual lans on a single Ethernet or wireless interface，giving the Ability to segregate lans efficiently it supports up to 4095 vlan interfaces，each with A unique vlan ID, per Ethernet device. Vlan priorites may also be used and manipulated. Many routers， including cisco and linux based，and many layer 2 switches use vlan to enable Multiple independent， isolated networks to exist on the same physical network.
A vlan is a logical grouping that allows end users to communicate as if they were physical Connected to a single isolated lan，independent of the physical configuration of the network。Vlan support adds a new dimension of security and cost savings permitting the sharing Of a physical network infrastructure and interfaces/ports while logicall maintaining separation among unrelated users.
实例：2个ros 通过lan接口连接，分别在2个ros上建立vlan1，vlan2 并设置好ip地址，使得他们能通信
ROS1 lan：192.168.1.251
ROS2 lan：192.168.1.252
Ros1中vlan1 id=11 ip：11.11.11.1/24
Vlan2 id=22 ip: 22.22.22.1/24
Ros2中vlan1 id=11 ip：11.11.11.2/24
Vlan2 id=22 ip: 22.22.22.2/24
2个网段可以互相ping通，说明vlan生效，这里务必要引起注意的就是vlan的ID必须对应上
禁用ros2的一个网段ip，然后ping ros1的同个vlan的ip 不通，然后做个路由，就可以通了！
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