一、实验目的

1、理解单臂路由和三层交换机实现VLAN通信的应用场景

2、掌握路由器子接口的配置方法

3、掌握子接口封装VLAN的配置方法

4、掌握测试多层交换网络连通性的方法

二、实验要求

1、使用三层交换机实现vlan间通信

2、使用单臂路由实现vlan间通信

三、实验内容

1、使用三层交换机实现VLAN间通信

根据要求建立拓扑如下图：

对交换机SW1、SW2和SW3的配置分别如下：

SW1:

<Huawei>sys

Enter system view, return user view with Ctrl+Z.

[Huawei]undo info ena

Info: Information center is disabled.

[Huawei]sysname SW1

[SW1]vlan batch 10 20

Info: This operation may take a few seconds. Please wait for a moment...done.

[SW1]int vlan 10

[SW1-Vlanif10]ip add 20.19.17.3 24

[SW1-Vlanif10]int vlan 20

[SW1-Vlanif20]ip add 20.19.18.2 24

[SW1-Vlanif20]int g0/0/1

[SW1-GigabitEthernet0/0/1]port link-type trunk

[SW1-GigabitEthernet0/0/1]port trunk allow-pass vlan all

[SW1-GigabitEthernet0/0/1]int g0/0/2

[SW1-GigabitEthernet0/0/2]port link-type trunk

[SW1-GigabitEthernet0/0/2]port trunk allow-pass vlan all

[SW1-GigabitEthernet0/0/2]q

[SW1]q

SW2:

<Huawei>sys

Enter system view, return user view with Ctrl+Z.

[Huawei]undo info ena

Info: Information center is disabled.

[Huawei]sysname SW2

[SW2]vlan 20

[SW2-vlan20]int vlan 20

[SW2-Vlanif20]int e0/0/2

[SW2-Ethernet0/0/2]port link-type access

[SW2-Ethernet0/0/2]port default vlan 20

[SW2-Ethernet0/0/2]int e0/0/1

[SW2-Ethernet0/0/1]port link-type trunk

[SW2-Ethernet0/0/1]port trunk allow-pass vlan all

[SW2-Ethernet0/0/1]q

[SW2]q

SW3:

<Huawei>sys

Enter system view, return user view with Ctrl+Z.

[Huawei]undo info ena

Info: Information center is disabled.

[Huawei]sysname SW3

[SW3]vlan 10

[SW3-vlan10]int vlan 10

[SW3-Vlanif10]int e0/0/1

[SW3-Ethernet0/0/1]port link-type access

[SW3-Ethernet0/0/1]port default vlan 10

[SW3-Ethernet0/0/1]int e0/0/3

[SW3-Ethernet0/0/3]port link-type access

[SW3-Ethernet0/0/3]port default vlan 10

[SW3-Ethernet0/0/3]int e0/0/2

[SW3-Ethernet0/0/2]port link-type trunk

[SW3-Ethernet0/0/2]port trunk allow-pass vlan all

[SW3-Ethernet0/0/2]q

[SW3]q

配置完毕后检查配置结果如下：

SW1：

SW2：

SW3：

用PC1 ping PC3结果如图：

用PC3 ping PC2结果如图：

结论：使用三层交换机实现了VLAN间的通信。

2、使用单臂路由实现VLAN间的通信

根据要求建立拓扑如下图：

对交换机SW6和路由器R2的配置分别如下（SW2和SW3的配置与在“三层交换机实现VLAN通信”中的配置相同，因此不再赘述）：

SW6：

<Huawei>

<Huawei>sys

Enter system view, return user view with Ctrl+Z.

[Huawei]undo info ena

Info: Information center is disabled.

[Huawei]sysname SW1

[Huawei]vlan batch 10 20

[SW1]int g0/0/1

[SW1-GigabitEthernet0/0/1]port link-type trunk

[SW1-GigabitEthernet0/0/1]port trunk allow-pass vlan all

[SW1-GigabitEthernet0/0/1]int g0/0/2

[SW1-GigabitEthernet0/0/2]port link-type trunk

[SW1-GigabitEthernet0/0/2]port trunk allow-pass vlan all

[SW1-GigabitEthernet0/0/2]int g0/0/3

[SW1-GigabitEthernet0/0/3]port link-type trunk

[SW1-GigabitEthernet0/0/3]port trunk allow-pass vlan all

[SW1-GigabitEthernet0/0/3]q

[SW1]q

R2:

<Huawei>sys

Enter system view, return user view with Ctrl+Z.

[Huawei]undo info ena

Info: Information center is disabled.

[Huawei]sysname R1

[R1]int g0/0/0.1

[R1-GigabitEthernet0/0/0.1]ip add 20.19.17.3 24

[R1-GigabitEthernet0/0/0.1]dot1q ter vid 10

[R1-GigabitEthernet0/0/0.1]arp bro ena

[R1-GigabitEthernet0/0/0.1]int g0/0/0.2

[R1-GigabitEthernet0/0/0.2]ip add 20.19.18.2 24

[R1-GigabitEthernet0/0/0.2]dot1q ter vid 20

[R1-GigabitEthernet0/0/0.2]arp bro ena

[R1-GigabitEthernet0/0/0.2]q

[R1]q

配置结果展示如下：

SW6：

R2:

用PC1 ping PC3结果如图：

用PC3 ping PC2结果如图：