PC1属于VLAN10通过GE0/0/1接口与交换机SW1相连，网关地址为192.168.10.254，即VLANIF10接口地址。PC2属于VLAN20通过GE0/0/1接口与交换机SW2相连，网关地址为192.168.20.254，即VLANIF20接口地址。交换机SW1和SW2通过设备互连VLAN30互连，交换机SW1的VLAN30的VLANIF地址为192.168.30.1，交换机SW2的VLAN30的VLANIF地址为192.168.30.2，两台电脑属于不同的VLAN且连接不同的交换机。整个网络结构如图所示，要求通过配置实现PC1和PC2互相通讯。

交换机SW1的配置如下：

[SW1]vlan 10

[SW1-vlan10]q

[SW1]interface vlanif 10

[SW1-Vlanif10]ip address 192.168.10.254 255.255.255.0

[SW1-Vlanif10]q

[SW1]interface g0/0/1

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

[SW1-GigabitEthernet0/0/1]port default vlan 10

完成以上配置，PC1能ping 192.168.10.254

[SW1-GigabitEthernet0/0/1]q

[SW1]vlan 30

[SW1-vlan30]q

[SW1]interface vlanif 30

[SW1-Vlanif30]ip address 192.168.30.1 255.255.255.0

[SW1-Vlanif30]q

[SW1]interface 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

完成以上配置，PC1能ping 192.168.30.1

参考以上配置，交换机SW2的配置如下：

[SW2]vlan 20

[SW2-vlan20]q

[SW2]interface vlanif 20

[SW2-Vlanif20]ip address 192.168.20.254 255.255.255.0

[SW2-Vlanif20]q

[SW2]interface g0/0/1

[SW2-GigabitEthernet0/0/1]port link-type access

[SW2-GigabitEthernet0/0/1]port default vlan 20

[SW2-GigabitEthernet0/0/1]q

完成以上配置，PC2能ping通192.168.20.254

[SW2]vlan 30

[SW2-vlan30]q

[SW2]interface vlanif 30

[SW2-Vlanif30]ip address 192.168.30.2 255.255.255.0

[SW2-Vlanif30]q

[SW2]interface g0/0/2

[SW2-GigabitEthernet0/0/2]port link-type trunk

[SW2-GigabitEthernet0/0/2]port trunk allow-pass vlan all

完成以上配置，PC2能ping通192.168.30.2

在交换机SW1中添加静态路由：[SW1]ip route-static 192.168.20.0 255.255.255.0 192.168.30.2

然后在交换机SW2中添加静态路由：[SW2]ip route-static 192.168.10.0 255.255.255.0 192.168.30.1

完成设置后即可实现PC1和PC2互相通讯。