《数据网络组建》PPT课件

1、主讲人：丁 蓉 VLAN技术的原理与配置上海电子信息职业技术学院数据网络组建课程目标目录CONTENTS三层交换实现三层交换实现VLAN间通信间通信单臂路由实现单臂路由实现VLAN间通信间通信实验实验020103 部署了VLAN的传统交换机不能实现不同VLAN间的二层报文转发，因此必须引入路由技术来实现不同VLAN间的通信。VLAN路由可以通过二层交换机配合路由器来实现，也可以通过三层交换机来实现。前言学完本课程后，您应该能：l掌握VLAN间通信的应用场景l掌握VLAN间通信的工作原理l掌握VLAN间通信的基本配置VLAN 100SWAVLAN 200lVLAN在分割广播域的同时也限制了不同V

2、LAN间的主机进行二层通信的能力。VLAN的局限性一、单臂路由实现VLAN间通信Page 6SWARTA主机A主机BVLAN 2VLAN 3l在二层交换机上配置VLAN，每一个VLAN使用一条独占的物理链路连接到路由器的一个接口上。单臂路由实现VLAN间通信VLAN路由-每个VLAN一个物理连接主机ASWA主机BTrunkG0/0/1.1G0/0/1.2VLAN 2VLAN 3GW:192.168.2.254GW:192.168.3.254RTAl将交换机和路由器之间的链路配置为Trunk链路，并且在路由器上创建子接口以支持VLAN路由。192.168.2.254192.168.3.254RT

3、AVLAN路由-单臂路由单臂路由实现VLAN间通信主机ASWARTA主机BG0/0/1VLAN 2VLAN 3SWAvlan batch 2 3SWA-GigabitEthernet0/0/1port link-type trunkSWA-GigabitEthernet0/0/1port trunk allow-pass vlan 2 3SWA-GigabitEthernet0/0/2port link-type accessSWA-GigabitEthernet0/0/2port default vlan 2 SWA-GigabitEthernet0/0/3port link-type ac

4、cessSWA-GigabitEthernet0/0/3port default vlan 3192.168.3.1/24192.168.2.1/24G0/0/2G0/0/3G0/0/1配置单臂路由单臂路由实现VLAN间通信G0/0/1.1G0/0/1.2RTAinterface GigabitEthernet0/0/1.1RTA-GigabitEthernet0/0/1.1dot1q termination vid 2RTA-GigabitEthernet0/0/1.1ip address 192.168.2.254 24 RTA-GigabitEthernet0/0/1.1arp broa

5、dcast enableRTAinterface GigabitEthernet0/0/1.2RTA-GigabitEthernet0/0/1.2dot1q termination vid 3RTA-GigabitEthernet0/0/1.2ip address 192.168.3.254 24 RTA-GigabitEthernet0/0/1.2arp broadcast enable192.168.2.254/24192.168.3.254/24主机ASWARTA主机BG0/0/1VLAN 2VLAN 3192.168.3.1/24192.168.2.1/24G0/0/2G0/0/3单臂

6、路由实现VLAN间通信Host Aping 192.168.3.1Ping 192.168.3.1: 32 data bytes, Press Ctrl_C to breakFrom 192.168.3.1: bytes=32 seq=1 ttl=127 time=15 msFrom 192.168.3.1: bytes=32 seq=2 ttl=127 time=15 msFrom 192.168.3.1: bytes=32 seq=3 ttl=127 time=32 msFrom 192.168.3.1: bytes=32 seq=4 ttl=127 time=16 msFrom 192.

7、168.3.1: bytes=32 seq=5 ttl=127 time=31 ms- 192.168.3.1 ping statistics - 5 packet(s) transmitted 5 packet(s) received 0.00% packet loss round-trip min/avg/max = 15/21/32 ms单臂路由实现VLAN间通信配置验证二、三层交换实现VLAN间通信主机A主机D主机B主机CVLAN 2VLAN 3GW:192.168.2.254GW:192.168.3.254GW:192.168.2.254GW:192.168.3.254l为每个VLA

8、N创建一个VLANIF接口作为网关。VLANIF 2: 192.168.2.254/24VLANIF 3: 192.168.3.254/24SWA三层交换实现VLAN间通信VLAN路由-三层交换主机ASWA主机BVLAN 2VLAN 3192.168.2.2/24192.168.3.2/24G0/0/1G0/0/2SWAvlan batch 2 3SWA-GigabitEthernet0/0/1port link-type accessSWA-GigabitEthernet0/0/1port default vlan 2 SWA-GigabitEthernet0/0/2port link-ty

9、pe accessSWA-GigabitEthernet0/0/2port default vlan 3VLANIF 2: 192.168.2.254/24VLANIF 3: 192.168.3.254/24三层交换实现VLAN间通信配置三层交换主机ASWA主机BVLAN 2VLAN 3192.168.2.2/24192.168.3.2/24G0/0/1G0/0/2SWAinterface vlanif 2SWA-Vlanif2ip address 192.168.2.254 24 SWA-Vlanif2quitSWAinterface vlanif 3 SWA-Vlanif3ip addre

10、ss 192.168.3.254 24 SWA-Vlanif3quitVLANIF 2: 192.168.2.254/24VLANIF 3: 192.168.3.254/24配置三层交换三层交换实现VLAN间通信Host Aping 192.168.3.2Ping 192.168.3.2: 32 data bytes, Press Ctrl_C to breakFrom 192.168.3.2: bytes=32 seq=1 ttl=127 time=15 msFrom 192.168.3.2: bytes=32 seq=2 ttl=127 time=15 msFrom 192.168.3.2: bytes=32 seq=3 ttl=127 time=32 msFrom 192.168.3.2: bytes=32 seq=4 ttl=127 time=16 msFrom 192.168.3.2: bytes=32 seq=5 ttl=127 time=31 ms- 192.168.3.2 ping statistics - 5 packet(s) transmitted 5 packet