使用路由器實現(xiàn)多個VLAN之間的互相通信，將路由器接口配置為各電腦終端的網(wǎng)關(guān)IP。

路由器R1的配置

<Huawei>system-view

[Huawei]sysname R1

[R1]interface GigabitEthernet 0/0/0

[R1-GigabitEthernet0/0/1]ip address 192.168.10.254 24

[R1-GigabitEthernet0/0/1]q

[R1]interface GigabitEthernet 0/0/1

[R1-GigabitEthernet0/0/1]ip address 192.168.20.254 24

[R1-GigabitEthernet0/0/1]q

[R1]display ip interface brief

交換機SW1的配置

[sw1]vlan batch 10 20

[sw1]interface GigabitEthernet 0/0/1

[sw1-GigabitEthernet0/0/11]port link-type access

[sw1-GigabitEthernet0/0/11]port default vlan 10

[sw1]interface GigabitEthernet 0/0/2

[sw1-GigabitEthernet0/0/11]port link-type access

[sw1-GigabitEthernet0/0/11]port default vlan 10

[sw1]interface GigabitEthernet 0/0/10

[sw1-GigabitEthernet0/0/11]port link-type access

[sw1-GigabitEthernet0/0/11]port default vlan 20

[sw1]interface GigabitEthernet 0/0/11

[sw1-GigabitEthernet0/0/11]port link-type access

[sw1-GigabitEthernet0/0/11]port default vlan 20

[sw1]interface GigabitEthernet 0/0/23

[sw1-GigabitEthernet0/0/23]port link-type access ；注意這時可以不用Trunk

[sw1-GigabitEthernet0/0/23]port default vlan 10

[sw1-GigabitEthernet0/0/23]q

[sw1]interface GigabitEthernet 0/0/24

[sw1-GigabitEthernet0/0/23]port link-type access

[sw1-GigabitEthernet0/0/24]port default vlan 20

[sw1-GigabitEthernet0/0/24]

這樣配置完成后，VLAN10與VLAN20電腦之間就能通了。

PC1通過交換機G0/0/1口，經(jīng)過G0/0/23口到達(dá)路由器G0/0/0；

經(jīng)過路由器轉(zhuǎn)發(fā)，經(jīng)過G0/0/1到達(dá)交換機G0/0/24口，再轉(zhuǎn)發(fā)到G0/0/10口，到達(dá)PC5;

這樣有幾個VLAN，那么路由器就需要幾個接口，幾條線路，那么路由器成本太高，因些單臂路由就出現(xiàn)了。