三层交换机虚拟接口做路由案例（思科系列）

1、三层交换机与二层交换机相连，二层交换机与PC相连。注意端口。PC0和PC2属于vlan10，PC1和PC3属于vlan20。

2、配置IP地址：PC0：192.168.10.10 255.255.255.0

                    PC1：192.168.20.10 255.255.255.0

                    PC2：192.168.10.20 255.255.255.0

                    PC3：192.168.20.30 255.255.255.0

                    vlan10网关：192.168.10.1

                    vlan20网关：192.168.20.1

                    配图例子，按照格式打。

1、Switch>enable

Switch#configure terminal

Enter configuration commands, one per line.  End with CNTL/Z.

Switch(config)#

Switch(config)#vlan 10

Switch(config-vlan)#ex

Switch(config)#vlan 20

Switch(config-vlan)#ex

Switch(config)#interface fastEthernet 0/1

Switch(config-if)#switchport mode access

Switch(config-if)#switchport access vlan 10

Switch(config-if)#ex

Switch(config)#interface fastEthernet 0/2

Switch(config-if)#switchport mode access

Switch(config-if)#switchport access vlan 20

Switch(config-if)#exit

Switch(config)#interface fastEthernet 0/24

Switch(config-if)#switchport mode trunk

Switch(config-if)#

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/24, changed state to down

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/24, changed state to up

switch2配置一样。如图

1、核心交换机

Switch(config)#int vlan 10

Switch(config-if)#

%LINK-5-CHANGED: Interface Vlan10, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan10, changed state to up

Switch(config-if)#ip add 192.168.10.1 255.255.255.0

Switch(config-if)#no shut

Switch(config-if)#ex

Switch(config)#int vlan 20

Switch(config-if)#

%LINK-5-CHANGED: Interface Vlan20, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan20, changed state to up

Switch(config-if)#ip add 192.168.20.1 255.255.255.0

Switch(config-if)#no shut

Switch(config-if)#ex

Switch(config)#ip routing

Switch(config)#ex

Switch#

2、测试连通性