不同vlan之间通信的三种方式

1、不同vlan间的通信简单配置1单臂路由(图)环境：一台路由器，一台二层交换机，两台pc机 二层交换机的配置一般模式：Switch>输入enable进入特权模式：Switch>enable输入configure terminal进入全局配置模式：Switch#configure terminal Enter configuration commands, one per line.  End with CNTL/Z.创建vlan 10 和 vlan 20：Switch(config)#vlan 10Switch(config-vlan)#vlan 20Switch

2、(config-vlan)# exit进入接口配置模式：Switch(config)#interface fastEthernet 0/1把0/1变成trunk口（默认是access口）Switch(config-if)#switchport mode trunk%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

3、upSwitch(config-if)#exit进入接口配置模式分别把对应的接口，加入对应的vlan：Switch(config)#interface fastEthernet 1/1Switch(config-if)#switchport mode access Switch(config-if)#switchport access vlan 10Switch(config-if)#interface fastEthernet 2/1Switch(config-if)#switchport mode access Switch(config-if)#switchport access vla

4、n 20到此二层交换机配置完毕！路由器的配置：Router>Router>enableRouter#configure terminal Enter configuration commands, one per line.  End with CNTL/Z.Router(config)#inter fas 0/0Router(config-if)#no ip address Router(config-if)#no shutdown 注意：单臂路由的配置父接口一定要no shutdown%LINK-5-CHANGED: Interface FastEthernet0/0

5、, changed state to up%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to upRouter(config-if)#exitRouter(config)#int fas 0/0.10%LINK-5-CHANGED: Interface FastEthernet0/0.10, changed state to up%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0.10, changed st

6、ate to upRouter(config-subif)#encapsulation dot1Q 10注意：在配置ip时一定要先封装802.1q协议Router(config-subif)#ip address 192.168.10.1 255.255.255.0Router(config-subif)#no shutdown Router(config-subif)#int fas 0/0.20%LINK-5-CHANGED: Interface FastEthernet0/0.20, changed state to up%LINEPROTO-5-UPDOWN: Line protoco

7、l o% Configuring IP routing on a LAN subinterface is only allowed if thatsubinterface is already configured as part of an IEEE 802.10, IEEE 802.1Q,or ISL vLAN.Router(config-subif)#encapsulation dot1Q 20Router(config-subif)#ip address 192.168.20.1 255.255.255.0Router(config-subif)#no shutdown Router(

8、config-subif)#查看路由表：Router#show ip route Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA exte

9、rnal type 2       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area       * - candidate default, U - per-user static ro

10、ute, o - ODR       P - periodic downloaded static routeGateway of last resort is not setC    192.168.10.0/24 is directly connected, FastEthernet0/0.10C    192.168.20.0/24 is directly connected, FastEthernet0/0.20Router#PC0的配置：PC1的配置：2.使用SVI

11、实现VLAN间的通信（图）环境：一台三层交换机，两台pc机三层交换机的配置：Switch>enable Switch#configure terminal Enter configuration commands, one per line.  End with CNTL/Z.创建vlan 10  20Switch(config)#vlan 10Switch(config-vlan)#vlan 20Switch(config-vlan)#exit配置SVI接口ipSwitch(config)#interface vlan 10%LINK-5-CHANGED: Inte

12、rface Vlan10, changed state to upSwitch(config-if)#ip address 192.168.10.1 255.255.255.0Switch(config-if)#no shutdown Switch(config-if)#interface vlan 20%LINK-5-CHANGED: Interface Vlan20, changed state to upSwitch(config-if)#ip address 192.168.20.1 255.255.255.0Switch(config-if)#no shutdown Switch(c

13、onfig-if)#exit改变接口模式并加入vlanSwitch(config)#interface fastEthernet 0/1Switch(config-if)#switchport mode access Switch(config-if)#switchport access vlan 10%LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan10, changed state to upSwitch(config-if)#interface fastEthernet 0/2Switch(config-if)#switchport

14、mode access Switch(config-if)#switchport access vlan 20%LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan20, changed state to upSwitch(config-if)#看三层交换机的路由表：Switch#show ip route Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP       D - EIGRP,

15、EX - EIGRP external, O - OSPF, IA - OSPF inter area       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP       i - IS-IS, L1 -

16、 IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area       * - candidate default, U - per-user static route, o - ODR       P - periodic downloaded static routeGateway of last resort is not setC    192.168.10.0/24 is dire

17、ctly connected, Vlan10C    192.168.20.0/24 is directly connected, Vlan20Switch#两主机的配置与单臂路由中两主机的配置一样3.跨交换机实现VLAN间的通信（图）环境：一台三层交换机，两台二层交换机，两台pc机三层交换机的配置(SW3)Switch>enableSwitch#configure terminal Enter configuration commands, one per line.  End with CNTL/Z.创建vlan 10 、 20 并设

18、置ipSwitch(config)#vlan 10Switch(config-vlan)#vlan 20Switch(config-vlan)#exitSwitch(config)#interface vlan 10%LINK-5-CHANGED: Interface Vlan10, changed state to upSwitch(config-if)#ip address 192.168.10.1 255.255.255.0Switch(config-if)#no shutdown Switch(config-if)#interface vlan 20%LINK-5-CHANGED: I

19、nterface Vlan20, changed state to upSwitch(config-if)#ip address 192.168.20.1 255.255.255.0Switch(config-if)#no shutdown Switch(config-if)#exit设置接口模式并加入相应的vlan（注意trunk口的设置）Switch(config)#interface fastEthernet 0/1Switch(config-if)#switchport mode trunkSwitch(config-if)#interface fastEthernet 0/1Swit

20、ch(config-if)#switchport access vlan 10%LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan10, changed state to upSwitch(config)#interface fastEthernet 0/2Switch(config-if)#switchport mode trunk Switch(config-if)#interface fastEthernet 0/2Switch(config-if)#switchport access vlan 20%LINEPROTO-5-UPDOW

21、N: Line protocol on Interface Vlan20, changed state to upSwitch#SW21的配置Switch>enableSwitch#configure  terminal Enter configuration commands, one per line.  End with CNTL/Z.Switch(config)#vlan 10Switch(config-vlan)#exitSwitch(config)#interface fastEthernet 0/1Switch(config-if)#switchport mode trunk%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 upSwitch(config-if)#interface fast