交换机设置IP地址：
switch(config)#interface vlan 1                     ；进入vlan 1
switch(config-if)#ip address <IP> <mask>            ；设置IP地址
switch(config)#ip default-gateway <IP>              ；设置默认网关

switch#vlan database                                ；进入VLAN设置
switch(vlan)#vlan 2                                 ；建VLAN 2
switch(vlan)#no vlan 2                              ；删vlan 2
switch(config)#int f0/1                             ；进入端口1
switch(config-if)#switchport access vlan 2          ；当前端口加入vlan 2
switch(config-if)#switchport mode trunk             ；设置为干线
switch(config-if)#switchport trunk allowed vlan 1,2 ；设置允许的vlan