VLAN间路由 ter-VLAN Routing 厦 Cisco.com 深圳职业技术学院计算机系网络专业
© 2006, Shenzhen Polytechnic. All rights reserved. 1 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) 夏 Cisco.com 1.介绍VLAN间路由 (Introducing Inter-VLAN Routing) 2.VLAN互联问题及解决方案 (Inter-VLAN Issues and Solutions 3.独臂路由器(A Router on a Stick) 4.Trunk连接的路由器(Trunk-Connected Routers) 5.配置VLAN间路由 (Configuring Inter-VLAN Routing) 2006 Shenzhen Polvtechnic.All rights re
© 2006 Shenzhen Polytechnic. All rights reserved. 2 教学目标（ Objectives ） 1.介绍VLAN间路由 （Introducing Inter-VLAN Routing） 2. VLAN互联问题及解决方案 （Inter-VLAN Issues and Solutions ） 3.独臂路由器（A Router on a Stick） 4. Trunk连接的路由器（Trunk-Connected Routers） 5.配置VLAN间路由 （Configuring Inter-VLAN Routing）
介绍VLAN间路由 (Introducing Inter-VLAN Routing) AWIIIE Cisco.com VLAN1 Pot】 Trunk Link using Crossover Cable Port 2 VLAN 200 没有路由的辅VLAN1和VLAN200不能通信。 VLAN1 and 200 cannot communicate without assistance of a router. zhen Polytechnic.All rights
© 2006 Shenzhen Polytechnic. All rights reserved. 3 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 cannot communicate without assistance of a router
介绍VLAN间路由 (Introducing Inter-VLAN Routing) AIIIWIEE Cisco.com VLAN 200 FastEthernet 0/1 FastEthernet 0/0 汽产用个碳篷鬓解0的信息，路由器多须用一个接口连接在 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. 2006 Shenzhen Polytechnic.All rights reserved
© 2006 Shenzhen Polytechnic. All rights reserved. 4 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) Cisco.com 1.当在一个广播域中的主机想要访问在另一个广播域中 的主机，必须通过路由器。 When a host in one broadcast domain wishes to communicate with a host in another broadcast domain,a router must be involved 2.如果一个VLAN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. 2006 Shenzhen Polytechnic.All rights reserved
© 2006 Shenzhen Polytechnic. All rights reserved. 5 介绍VLAN间路由 （Introducing Inter-VLAN Routing） 1.当在一个广播域中的主机想要访问在另一个广播域中 的主机，必须通过路由器。 When a host in one broadcast domain wishes to communicate with a host in another broadcast domain, a router must be involved . 2.如果一个VLAN 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) AWWI厦 Cisco.com 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. 1.端用户设备需要到达非本地主机 The need for end user devices to reach non-local hosts 2.不同vlan的主机需要通信 The need for hosts on different VLANs to communicate
© 2006 Shenzhen Polytechnic. All rights reserved. 6 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. 1.端用户设备需要到达非本地主机 The need for end user devices to reach non-local hosts 2.不同vlan的主机需要通信 The need for hosts on different VLANs to communicate
VLAN互联解决方案(Inter-VLAN Solutions) AIIIE Cisco.com 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. 2006 Shenzhen Polytechnic.All rights reserved
© 2006 Shenzhen Polytechnic. All rights reserved. 7 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 Cisco.com Logical Physical Link Communication per VLAN VLAN 3 VLAN 2 VLAN 1 Cisco Internetworking Software 2006 Shenzhen Polytechnic.All rights reserved
© 2006 Shenzhen Polytechnic. All rights reserved. 8 逻辑和物理连接 （ Logical and Physical Connectivity ）
独臂路由器（A Router on a Stick) wmm Cisco.com Red Blue Layer 2 Backbone 二层主干 Red 2006 She zhen Polytechnic.All rights rese
© 2006 Shenzhen Polytechnic. All rights reserved. 9 独臂路由器（A Router on a Stick）
物理和逻辑接口 (Physical and Logical Interfaces) wwwwcmm Cisco.com 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,a network with four VLANs would require four physical connections between the switch and the external router. 随着技术的发展，向SL变得应用更为广泛，网络设计者开始 在交换机和路由器之间的连接使用Trunk。 As technologies such as Inter-Switch Link(ISL)became more common,network designers began to use trunk links to connect routers to switches. 2006 Shenzhen Polytechnic.All rights reserved
© 2006 Shenzhen Polytechnic. All rights reserved. 10 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, a network with four VLANs would require four physical connections between the switch and the external router. 随着技术的发展，向ISL变得应用更为广泛，网络设计者开始 在交换机和路由器之间的连接使用Trunk。 As technologies such as Inter-Switch Link (ISL) became more common, network designers began to use trunk links to connect routers to switches