实验:使用三层交换机配置网络

1.构图:

2.步骤:

1. 添加两台s3700和一台s5700交换器,组成三层交换

2. 配置pc1 to pc4 的ip/24,以及网关
   如:pc1其余的参考pc1配置

3. 配置三层交换机sw1

• [sw1]vlan batch 2 to 4  //定义vlan2 - vlan4
• [sw1]interface GigabitEthernet 0/0/1    // 进入g/0/01接口
• [sw1-GigabitEthernet0/0/1]port link-type trunk  //设置接入接口链路类型:trunk
• [sw1-GigabitEthernet0/0/1]port trunk allow-pass vlan all   // 开放所有vlan
• [sw1-GigabitEthernet0/0/1]interface GigabitEthernet 0/0/2  //同理以上
• [sw1-GigabitEthernet0/0/2]port link-type trunk
• [sw1-GigabitEthernet0/0/2]port trunk allow-pass vlan all
• [sw1-GigabitEthernet0/0/2]quit

• ---

• [sw1]interface vlanif 1 //进入三层交换,逻辑接口vlanif 1
• [sw1-Vlanif1]ip address 192.168.1.254 24  //配置ip ,以下同理
• [sw1-Vlanif1]interface vlanif 2
• [sw1-Vlanif2]ip address 192.168.2.254 24
• [sw1-Vlanif2]interface vlanif 3
• [sw1-Vlanif3]ip address 192.168.3.254 24
• [sw1-Vlanif3]interface vlanif 4
• [sw1-Vlanif4]ip address 192.168.4.254 24

4.配置二层交换机sw2

• [sw2]vlan batch 2 to 4
• [sw2]interface Ethernet 0/0/1
• [sw2-Ethernet0/0/1]port link-type trunk  //sw2接口下有大于1的vlan区域,故而使用trunk来承担多个vlan
• [sw2-Ethernet0/0/1]port trunk allow-pass vlan all
• [sw2-Ethernet0/0/1]quit

• ---

• [sw2]interface Ethernet 0/0/3
• [sw2-Ethernet0/0/3]port link-type access
• [sw2-Ethernet0/0/3]port default vlan 2

5.配置二层交换机sw3

• sw3]vlan batch 3 to 4
• [sw3]interface Ethernet 0/0/1
• [sw3-Ethernet0/0/1]port link-type trunk
• [sw3-Ethernet0/0/1]port trunk allow-pass vlan all
• [sw3-Ethernet0/0/1]interface Ethernet 0/0/2
• [sw3-Ethernet0/0/2]port link-type access
• [sw3-Ethernet0/0/2]port default vlan 3
• [sw3-Ethernet0/0/2]interface Ethernet 0/0/3
• [sw3-Ethernet0/0/3]port link-type access
• [sw3-Ethernet0/0/3]port default vlan 4

6.测试

pc1 对pc2/pc3/pc4 去ping连通测试

3.总结

• 区分?交换机上接口的link-type的选择:
•         access:用于承担一个valn
•         trunk:用于承担多个vlan
• 不仅是路由拓扑,三层交换拓扑可以实现不同网段的访问