三层交换VLAN路由

　　PC1配置：

　　No ip routing

　　interface FastEthernet0/0

　　ip address 172.16.20.254 255.255.255.0

　　No shutdown

　　PC2配置：

　　No ip routing

　　interface FastEthernet0/0

　　ip address 172.16.30.254 255.255.255.0

　　No shutdown

　　Switch配置：

　　Ip routing

　　interface FastEthernet0/1

　　switchport access vlan 20

　　no ip address

　　!

　　interface FastEthernet0/2

　　switchport access vlan 30

　　no ip address

　　!

　　Vlan database

　　Vlan 20

　　Vlan 30

　　Exit

　　!

　　interface Vlan20

　　ip address 172.16.20.1 255.255.255.0

　　No shutdown

　　!

　　interface Vlan30

　　ip address 172.16.30.1 255.255.255.0

　　No shutdown

　　===========================

　　验证：

　　PC1#ping 172.16.30.254 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 172.16.30.254, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 44/100/196 ms

　　PC2#ping 172.16.20.254 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 172.16.20.254, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 56/80/120 ms