实验案例一:在一台交换机上配置 VLAN

1.实验环境

实验拓扑图结构如图12.12所示，其中PC1和PC3属于VLAN 2，PC2属于VLAN 3，PC1的IP
地址为192.168.0.2/24，PC2的P 地址为 192.168.1.2/24，PC3的P地址为192.168.0.3/24

2.需求描述

要求处于相同VLAN中的主机能够相互通信，处于不同VLAN中的主机不能相互通信

3.推荐步骤

1. 在交换机上添加两个VLAN.
2. 将交换机的第1~3端口分配给相应的VLAN
3. 验证PC1和PC3是否能正常通信，而PC2无法和PC1、PC3通信

4.实验步骤

1.在交换机上添加两个VLAN

sw1(config)#vlan 2
sw1(config-vlan)#exit
sw1(config)#vlan 3
sw1(config-vlan)#exit

2.将交换机的第1端口分配给VLAN2

sw1(config)#interface fastEthernet 0/1
sw1(config-if)#switchport mode access 
sw1(config-if)#switchport access vlan 2
sw1(config-if)#exit

3.将交换机的第2端口分配给VLAN3

sw1(config)#interface fastEthernet 0/2
sw1(config-if)#switchport mode access 
sw1(config-if)#switchport access vlan 3
sw1(config-if)#exit

4.将交换机的第3端口分配给VLAN2

sw1(config)#interface fastEthernet 0/3
sw1(config-if)#switchport mode access 
sw1(config-if)#switchport access vlan 2
sw1(config-if)#exit

5.验证PC1和PC3是否能正常通信

C:\>ping 192.168.0.3

Pinging 192.168.0.3 with 32 bytes of data:

Reply from 192.168.0.3: bytes=32 time<1ms TTL=128
Reply from 192.168.0.3: bytes=32 time<1ms TTL=128
Reply from 192.168.0.3: bytes=32 time<1ms TTL=128
Reply from 192.168.0.3: bytes=32 time<1ms TTL=128

Ping statistics for 192.168.0.3:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 0ms, Maximum = 0ms, Average = 0ms

C:\>

6.PC2无法和PC1、PC3通信

C:\>ping 192.168.0.2

Pinging 192.168.0.2 with 32 bytes of data:

Request timed out.
Request timed out.
Request timed out.
Request timed out.

Ping statistics for 192.168.0.2:
    Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

C:\>ping 192.168.0.3

Pinging 192.168.0.3 with 32 bytes of data:

Request timed out.
Request timed out.
Request timed out.
Request timed out.

Ping statistics for 192.168.0.3:
    Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

C:\>