拓扑图：

一、配置交换机vtp

SW1：

SW1>enableSW1#config tEnter configuration commands, one per line.  End with CNTL/Z.SW1(config)#hostname SW1 SW1(config)#vlan 10SW1(config-vlan)#exitSW1(config)#vlan 20SW1(config-vlan)#exitSW1(config)#vtp mode server      //配置sw1为服务器端Device mode already VTP SERVER.SW1(config)#vtp domain cisco       //配置vtp 的域名为CiscoDomain name already set to cisco.SW1(config)#vtp password cisco123  //配置密码Password already set to cisco123SW1(config)#service password-encryption   //明文密码加密SW1(config)#interface f0/1SW1(config-if)#switchport mode trunk  //配置两交换机间链路模式为trunkSW1(config-if)#switchport trunk allowed vlan all SW1(config-if)#no shutdownSW1(config-if)#exitSW1(config)#interface f0/2SW1(config-if)#switchport mode accessSW1(config-if)#switchport access vlan 10SW1(config-if)#no shutdownSW1(config-if)#exitSW1(config)#interface f0/3SW1(config-if)#switchport mode trunk  //配置路由器与交换机相连链路为trunkSW1(config-if)#switchport trunk allowed vlan all SW1(config-if)#no shutdownSW1(config-if)#exitSW1(config)#

sw2:

SW2>enableSW2#config tEnter configuration commands, one per line.  End with CNTL/Z.SW2(config)#hostname SW2SW2(config)#vtp mode clientDevice mode already VTP CLIENT.SW2(config)#vtp domain cisco    //配置sw2为vtp客户端模式Domain name already set to cisco.SW2(config)#vtp password cisco123  //配置密码Password already set to cisco123SW2(config)#service password-encryption  //明文密码加密SW2(config)#interface f0/1SW2(config-if)#switchport mode trunkSW2(config-if)#switchport trunk allowed vlan all SW2(config-if)#no shutdown SW2(config-if)#exitSW2(config)#interface f0/2SW2(config-if)#switchport mode accessSW2(config-if)#switchport access vlan 20SW2(config-if)#no shutdownSW2(config-if)#exitSW2(config)#

二、在SW2上查看，是否学习到相应的VLAN

SW2(config)#do show vlanVLAN Name                             Status    Ports---- -------------------------------- --------- -------------------------------1    default                          active    Fa0/3, Fa0/4, Fa0/5, Fa0/6                                                Fa0/7, Fa0/8, Fa0/9, Fa0/10                                                Fa0/11, Fa0/12, Fa0/13, Fa0/14                                                Fa0/15, Fa0/16, Fa0/17, Fa0/18                                                Fa0/19, Fa0/20, Fa0/21, Fa0/22                                                Fa0/23, Fa0/24, Gig1/1, Gig1/210   VLAN0010                         active    20   VLAN0020                         active    Fa0/21002 fddi-default                     act/unsup 1003 token-ring-default               act/unsup 1004 fddinet-default                  act/unsup 1005 trnet-default                    act/unsup VLAN Type  SAID       MTU   Parent RingNo BridgeNo Stp  BrdgMode Trans1 Trans2---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------1    enet  100001     1500  -      -      -        -    -        0      010   enet  100010     1500  -      -      -        -    -        0      020   enet  100020     1500  -      -      -        -    -        0      01002 fddi  101002     1500  -      -      -        -    -        0      0   1003 tr    101003     1500  -      -      -        -    -        0      0   1004 fdnet 101004     1500  -      -      -        ieee -        0      0   1005 trnet 101005     1500  -      -      -        ibm  -        0      0   Remote SPAN VLANs------------------------------------------------------------------------------Primary Secondary Type              Ports------- --------- ----------------- ------------------------------------------SW2(config)#

由查看结果可知，SW2交换机已从SW1交换机学习到了VLAN 10和VLAN 20。

三、配置路由器子接口

AR1:

AR1>enableAR1#config tEnter configuration commands, one per line.  End with CNTL/Z.AR1(config)#hostname AR1AR1(config)#interface g0/0   //进入物理接口AR1(config-if)#no shutdown  //启用该接口AR1(config-if)#interface g0/0.10  //进入子接口AR1(config-subif)#encapsulation dot1q 10  // 将子接口封装到VLAN 10中AR1(config-subif)#ip address 192.168.10.254 255.255.255.0  //配置IP地址AR1(config-subif)#no shutdown   //启用子接口AR1(config-subif)#exitAR1(config)#interface g0/0.20AR1(config-subif)#encapsulation dot1q 20   //将子接口封装到VLAN 20中AR1(config-subif)#ip address 192.168.20.254 255.255.255.0AR1(config-subif)#no shutdownAR1(config-subif)#exitAR1(config)#

四、电脑终端ip地址配置

PC1:

PC2:

五、测试

PC1 ping PC2

PC2 ping PC1