文档介绍：不同VLAN之间互访
利用三层交换机实现不同VLAN之间的互访
交换机switch0和switch1创建4个vlan,vlan 10,vlan 20,vlan30,vlan 40,将每个交换机的fa0/1-3,fa0/4-6,fa0/7-9,fa0/10-12分别分配给以上四个 vlan，再在三层交换机上进行配置，要求实现不同vlan之间能够互访。
拓扑图
二、交换机的配置
1、switch0的配置
Switch>en
Switch#vlan database
% Warning: It is recommended to configure VLAN from config mode,
as VLAN database mode is being deprecated. Please consult user
documentation for configuring VTP/VLAN in config mode.
Switch(vlan)#vlan 10
VLAN 10 added:
Name: VLAN0010
Switch(vlan)#vlan 20
VLAN 20 added:
Name: VLAN0020
Switch(vlan)#vlan 30
VLAN 30 added:
Name: VLAN0030
Switch(vlan)#vlan 40
VLAN 40 added:
Name: VLAN0040
Switch(vlan)#exit
APPLY completed.
Exiting....
Switch#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#interface range fa0/1-3
Switch(config-if-range)#switchport mode access
Switch(config-if-range)#switchport access vlan 10
Switch(config-if-range)#exit
Switch(config)#interface range fa0/4-6
Switch(config-if-range)#switchport mode access
Switch(config-if-range)#switchport access vlan 2
% Access VLAN does not exist. Creating vlan 2
Switch(config-if-range)#switchport access vlan 20
Switch(config-if-range)#exit
Switch(config)#interface range fa0/7-9
Switch(config-if-range)#switchport mode access
Switch(config-if-range)#switchport access vlan 30
Switch(config-if-range)#exit
Switch(config)#interface range fa0/10-12
Switch(config-if-range)#switchport mode access
Switch(config-if-range)#switchport access vlan 40
Switch(config-if-range)#exit
Switch(config)#interface fa0/24
Switch(config-if)#switchport mode trunk
Switch(config-if)#switchport trunk allowed vlan all
Switch(config-if)#exit
Switch(config)#
2、switch1的配置
同switch0的配置一样
3、Multilayer Switch0
Switch>enable
Switch#vlan database
% Warning: It is recommended to configure VLAN from config mode,
as VLAN database mode is being deprecated. Please consult user
documentation for configurin