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ROS3.30視頻教程集萃（從入門到精通）
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（基礎篇）
【第十三課】 vlan
什麼是vlan？虛擬局域網，注意一個vlan中的所有的主機都不能與另外一個vlan中的任何主機通信，如果要進行通信，必須有路由。
Ros中vlan如何操作？
官方原話：
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.
實例：2個ros 通過lan接口連接，分別在2個ros上建立vlan1，vlan2 並設置好ip地址，使得他們能通信
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個網段可以互相ping通，說明vlan生效，這裡務必要引起注意的就是vlan的ID必須對應上
禁用ros2的一個網段ip，然後ping ros1的同個vlan的ip 不通，然後做個路由，就可以通了！
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