之前我一直不知道怎么区分二层交换机和三层交换机的区别，三层交换就是给vlan划分ip。
[Huawei]vlan 10
[Huawei-vlan10]vlan 20
[Huawei-vlan20]q
[Huawei]interface GigabitEthernet 0/0/1
[Huawei-GigabitEthernet0/0/1]port link-type access
[Huawei-GigabitEthernet0/0/1]port default vlan 10
[Huawei-GigabitEthernet0/0/1]q
[Huawei]interface GigabitEthernet 0/0/2
[Huawei-GigabitEthernet0/0/2]port link-type access
[Huawei-GigabitEthernet0/0/2]port default vlan 10
[Huawei-GigabitEthernet0/0/2]q
[Huawei]interface GigabitEthernet 0/0/3
[Huawei-GigabitEthernet0/0/3]port link-type access
[Huawei-GigabitEthernet0/0/3]port default vlan 20
有几个vlan就在几个vlan上创建ip
[Huawei]interface Vlanif 10
[Huawei-Vlanif10]ip address 192.168.1.254 24
[Huawei]interface Vlanif 20
[Huawei-Vlanif20]ip address 192.168.2.254 24
用PC1 ping PC2 与 PC3
PC>ping 192.168.1.2
Ping 192.168.1.2: 32 data bytes, Press Ctrl_C to break
From 192.168.1.2: bytes=32 seq=1 ttl=128 time=47 ms
From 192.168.1.2: bytes=32 seq=2 ttl=128 time=47 ms
PC>ping 192.168.2.1
Ping 192.168.2.1: 32 data bytes, Press Ctrl_C to break
From 192.168.2.1: bytes=32 seq=1 ttl=127 time=78 ms
From 192.168.2.1: bytes=32 seq=2 ttl=127 time=47 ms