分析华为路由器单臂路由实例应用 中国网管学院
需求:在局域网中,通过交换机上配置VLAN可以减少主机通讯广播域的范围,当VLAN之间有部分主机需要通讯,但交换机不支持三层交换时,可以采用一台支持802.1Q的路由器实现VLAN的互通.这需要在以太口上建立子接口,分配IP地址作为该VLAN的网关,同时启动802.1Q. 组网:路由器E0端口与交换机的上行trunk端口(第24端口)相连,交换机下行口划分3个VLAN,带若干主机. 拓扑图如下： 1.路由器的配置以下是引用片断： inter e0 ip add 10.0.0.1 255.255.255.0 inter e0.1 //定义子接口E0.1 ip add 172.16.1.1 255.255.255.0 vlan-type dot1q vid 1 //指定以太网子接口属于VLAN1,此命令应用在以太网子接口上。只有配置了该命令之后，以太网子接口才会根据配置的VLAN ID 号在以太网帧头中嵌入VLAN 标签，与该网口相连的交换机接口才能正确处理接收到的帧。 inter e0.2 //定义子接口E0.2 ip add 172.16.2.1 255.255.255.0 vlan-type dot1q vid 2 //指定以太网子接口属于VLAN2 inter e0.3 //定义子接口E0.3 ip add 172.16.3.1 255.255.255.0 vlan-type dot1q vid 3 //指定以太网子接口属于VLAN3 inter e0 undo shut % Inte***ce Ethernet0 is up //用网线将E0端口连到S3026第24端口 %19:46:32: Inte***ce Ethernet0 changed state to UP %19:46:32: Line protocol ip on inte***ce Ethernet0, changed state to UP %19:46:32: Line protocol ip on inte***ce Ethernet0.1, changed state to UP %19:46:32: Line protocol ip on inte***ce Ethernet0.2, changed state to UP %19:46:32: Line protocol ip on inte***ce Ethernet0.3, changed state to UP 2.交换机的配置以下是引用片断： sys Enter system view , return user view with Ctrl+Z. vlan 1 vlan 2 port ethernet 0/17 to eth 0/19 eth 0/22 //将第17至19端口，和第22端口加入VLAN2 vlan 3 port eth 0/21 //将第21端口加入VLAN2 inter e0/24 port link-type trunk //将第24端口设为trunk口 port trunk permit vlan all //答应所有VLAN流量通过 Please wait........................................... Done. dis port trunk //检验TRUNK口配置 Now, the following trunking ports exist: Ethernet0/24 dis vlan 2 //检验VLAN2的配置 VLAN ID: 2 VLAN Type: static Route Inte***ce: not configured Description: VLAN 0002 Tagged Ports: Ethernet0/24 Untagged Ports: Ethernet0/17 Ethernet0/18 Ethernet0/19 Ethernet0/22 dis vlan 3 //检验VLAN3的配置 VLAN ID: 3 VLAN Type: static Route Inte***ce: not configured Description: VLAN 0003 Tagged Ports: Ethernet0/24 Untagged Ports: Ethernet0/21< 3.在工作站上检查网络是否连通。此工作站连接S3026第21端口，属于VLAN2。以下是引用片断：C:/Docume 1/2 12下一页尾页
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