使用三層交換機實現VLAN間通訊
阿新 • • 發佈：2018-12-22
實現PC0能與PC1、PC2、PC3通訊
1.先配置使得vlan內通訊，vlan間通訊隔離 對switch0 Switch>ena Switch#conf t Enter configuration commands, one per line. End with CNTL/Z. Switch(config)#vlan 10 Switch(config-vlan)#exit Switch(config)#vlan 20 Switch(config-vlan)#exit Switch(config)#int f0/23 Switch(config-if)#switchport mode access Switch(config-if)#switchport access vlan 20 Switch(config-if)#int f0/24 Switch(config-if)#switchport mode access Switch(config-if)#switchport access vlan 10 Switch(config-if)#int f0/1 Switch(config-if)#switchport mode trunk Switch(config-if)# %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to down %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up Switch(config-if)#switchport trunk allowed vlan all Switch(config-if)#no shutdown 對switch1 Switch>ena Switch#conf t Enter configuration commands, one per line. End with CNTL/Z. Switch(config)#vlan 10 Switch(config-vlan)#exit Switch(config)#vlan 20 Switch(config-vlan)#exit Switch(config-if)#int f0/24 Switch(config-if)#switchport mode access Switch(config-if)#switchport access vlan 10 Switch(config-if)#int f0/23 Switch(config-if)#switchport mode access Switch(config-if)#switchport access vlan 20 Switch(config-if)#int f0/1 Switch(config-if)#switchport mode trunk Switch(config-if)# %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to down %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up Switch(config-if)#switchport trunk allowed vlan all Switch(config-if)#no shutdown 對三層交換機 Switch>ena Switch#conf t Enter configuration commands, one per line. End with CNTL/Z. Switch(config)#vlan 10 Switch(config-vlan)#exit Switch(config)#vlan 20 Switch(config-vlan)#exit Switch(config)#int f0/1 Switch(config-if)#switchport mode trunk //直接設定trunk口 Command rejected: An interface whose trunk encapsulation is "Auto" can not be configured to "trunk" mode. Switch(config-if)#switchport trunk allowed vlan all Switch(config-if)#no shutdown Switch(config-if)#int f0/2 Switch(config-if)#switchport trunk encapsulation dot1q //以dot1q封裝埠 Switch(config-if)#switchport mode trunk //將埠設定為trunk模式 Switch(config-if)#switchport trunk allowed vlan all Switch(config-if)#no shutdown Switch(config-if)#end 此時已經配置完成vlan內可以通訊，vlan間通訊隔離 先設定主機IP PC0：192.168.10.3 255.255.255.0 PC1：192.168.20.3 255.255.255.0 PC2：192.168.10.2 255.255.255.0 PC3：192.168.20.2 255.255.255.0
2.在三層交換機上配SVI Switch>ena Switch#conf t Enter configuration commands, one per line. End with CNTL/Z. 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 shutdown Switch(config-if)#exit 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 shutdown Switch(config-if)#exit 3.在三層交換機上開啟路由功能 Switch(config)#ip routing 4.設定主機閘道器（相應vlan SVI） PC0：192.168.10.1 PC1：192.168.20.1 PC2：192.168.10.1 PC3：192.168.20.1 對PC0
已實現vlan間通訊