文档介绍：VLAN间路由 Inter-VLAN Routing
深圳职业技术学院计算机系网络专业
教学目标( Objectives )
(Introducing Inter-VLAN Routing)
2. VLAN互联问题及解决方案
(Inter-VLAN Issues and Solutions )
(A Router on a Stick)
4. Trunk连接的路由器(Trunk-Connected Routers)
(Configuring Inter-VLAN Routing)
介绍VLAN间路由 (Introducing Inter-VLAN Routing)
没有路由的辅助VLAN1和VLAN200不能通信。
VLAN1 and 200 municate without assistance of a router.
介绍VLAN间路由 (Introducing Inter-VLAN Routing)
为了路由在一个非Trunk环境下VLAN1和200的信息,路由器必须用一个接口连接在VLAN1中,用一个接口连接在VLAN200中。
To route traffic between vlan1 and vlan200 in a non-vlan-trunk environment ,a router must connect to a port in vlan 1 and a port in vlan 200.
介绍VLAN间路由 (Introducing Inter-VLAN Routing)
,必须通过路由器。
When a host in one broadcast domain wishes municate with a host in another broadcast domain, a router must be involved .
跨越多个设备,在设备之间要用Trunk连接。
If a VLAN spans across multiple devices a trunk is used to interconnect the devices.
VLAN互联问题(Inter-VLAN Issues)
当多个VLAN连接到一起时,几个技术问题随之出现When VLANs are connected together, several technical issues will arise.
The need for end user devices to reach non-local hosts
The need for hosts on different VLANs municate
VLAN互联解决方案(Inter-VLAN Solutions )
1. VLAN间通信可以通过逻辑的或者物理的连接来解决。
Inter-VLAN connectivity can be achieved through either logical or physical connectivity.
2. 逻辑连接涉及一个从交换机到路由器的单独Trunk连接Trunk链路携带多个VLAN的信息,这种拓扑称为独臂路由器。
Logical connectivity involves a single connection, or trunk, from the switch to the router. That trunk can support multiple VLANs. This topology is called a router on a stick
3. 物理连接需要为每一个VLAN指定一个单独的物理接口。
Physical connectivity involves a separate physical connection for each VLAN.
逻辑和物理连接 ( Logical and Physical Connectivity )
独臂路由器(A Router on a Stick)
物理和逻辑接口 (Physical and Logical Interfaces)
在传统情况下,有4个VLAN的网络需要交换机和路由器之间使用四个物理连接
 In a traditional situation, work with four VLANs would require four physical connections between th