第一步，创建VTP域
3550:
3550#vlan database
3550(vlan)#vtp server
3550(vlan)#vtp domain sy
3550(vlan)#vtp password cisco
3550(vlan)#vtp pruning
3550(vlan)#exit

SW1:
SW1#vlan database
SW1(vlan)#vtp client
SW1(vlan)#vtp domain sy
SW1(vlan)#vtp password cisco
SW1(vlan)#exit

SW2:
SW2#vlan database
SW2(vlan)#vtp client
SW2(vlan)#vtp domain sy
SW2(vlan)#vtp password cisco
SW2(vlan)#exit

第二步，配置中继
3550：
3550(config)#int range f0/1 - 2
3550(config-if-range)#switchport mode trunk
3550(config-if-range)#switchport trunk encapsulation dot1q
3550(config-if-range)#end

SW1：
SW1#conf t
SW1(config)#int f0/15
SW1(config-if)#switchport mode trunk
SW1(config-if)#switchport trunk encapsulation dot1q
SW1(config-if)#end

SW2：
SW2#conf t
SW2(config)#int f0/15
SW2(config-if)#switchport mode trunk
SW2(config-if)#switchport trunk encapsulation dot1q
SW2(config-if)#end

第三步，创建VLAN，客户机学习
3550：
3550#vlan database
3550(vlan)#vlan 2
3550(vlan)#vlan 3
3550(vlan)#vtp pruning
3550(vlan)#exit
3550#show vtp status
VTP Version                                         : 2
Configuration Revision                            : 4
Maximum VLANs supported locally            : 256
Number of existing VLANs                       : 7
VTP Operating Mode                              : Server
VTP Domain Name                                 : sy
VTP Pruning Mode                                 : Enabled
VTP V2 Mode                                        : Disabled
VTP Traps Generation                             : Disabled
MD5 digest                                            : 0xC1 0x0C 0x8F 0x5D 0x5A 0x3C 0xAE 0xF4
Configuration last modified by 0.0.0.0 at 3-1-02 02:09:54
Local updater ID is 0.0.0.0 (no valid interface found)
SW1：
SW1#show vtp status
VTP Version                                             : 2
Configuration Revision                                : 4
Maximum VLANs supported locally                : 256
Number of existing VLANs                          : 7
VTP Operating Mode                                 : Client
VTP Domain Name                                    : sy
VTP Pruning Mode                                    : Enabled
VTP V2 Mode                                          : Disabled
VTP Traps Generation                               : Disabled
MD5 digest                      : 0xC1 0x0C 0x8F 0x5D 0x5A 0x3C 0xAE 0xF4
Configuration last modified by 0.0.0.0 at 3-1-02 02:09:54

SW2：
SW2#show vtp status
VTP Version                     : 2
Configuration Revision          : 4
Maximum VLANs supported locally : 256
Number of existing VLANs        : 7
VTP Operating Mode              : Client
VTP Domain Name                 : sy
VTP Pruning Mode                : Enabled
VTP V2 Mode                     : Disabled
VTP Traps Generation            : Disabled
MD5 digest                      : 0xC1 0x0C 0x8F 0x5D 0x5A 0x3C 0xAE 0xF4
Configuration last modified by 0.0.0.0 at 3-1-02 02:09:54

第四步：端口加入到VLAN中
SW1：
SW1#conf t
SW1(config)#int f0/1
SW1(config-if)#switchport mode access
SW1(config-if)#switchport access vlan 2
SW1(config-if)#end
SW2：
SW2#conf t
SW2(config)#int f0/1
SW2(config-if)#switchport mode access
SW2(config-if)#switchport access vlan 3
SW2(config-if)#end

第五步，配置三层交换，实现VLAN之间互通
3550：
3550#conf t
3550(config)#ip routing
3550(config)#int vlan 2
3550(config-if)#ip address 192.168.2.1 255.255.255.0
3550(config-if)#no shutdown
3550(config-if)#exit
3550(config)#int vlan 3
3550(config-if)#ip address 192.168.3.1 255.255.255.0
3550(config-if)#no shutdown
3550(config-if)#end

第六步，客户机验证
PC1：
PC1#ping 192.168.3.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.3.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 144/194/288 ms

PC2：
PC2#ping 192.168.2.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.2.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 204/250/360 ms

第七步，在三层交换机上配置路由功能，并启用动态路由协议
3550：
3550#conf t
3550(config)#int f0/3
3550(config-if)#no switchport
3550(config-if)#ip address 10.0.0.2 255.255.255.0
3550(config-if)#no shutdown
3550(config-if)#exit
3550(config)#router ospf 1
3550(config-router)#network 192.168.0.0 0.0.255.255 area 0
3550(config-router)#network 10.0.0.0 0.0.0.255 area 0
3550(config-router)#end
3550#show ip route
Gateway of last resort is not set
     172.16.0.0/24 is subnetted, 1 subnets
O       172.16.1.0 [110/2] via 10.0.0.1, 00:38:34, FastEthernet0/3
     10.0.0.0/24 is subnetted, 1 subnets
C       10.0.0.0 is directly connected, FastEthernet0/3
C    192.168.2.0/24 is directly connected, Vlan2
C    192.168.3.0/24 is directly connected, Vlan3

第八步，配置路由器，并启用动态路由协议
Router:
Router#conf t
Router(config)#int f0/0
Router(config-if)#ip address 10.0.0.1 255.255.255.0
Router(config-if)#no shutdown
Router(config-if)#exit
Router(config)#int f1/0
Router(config-if)#ip address 172.16.1.254 255.255.255.0
Router(config-if)#no shutdown
Router(config-if)#exit
Router(config)#router ospf 2
Router(config-router)#network 172.16.1.0 0.0.0.255 area 0
Router(config-router)#network 10.0.0.0 0.0.0.255 area 0
Router(config-router)#end
Router#show ip route
Gateway of last resort is not set
     172.16.0.0/24 is subnetted, 1 subnets
C       172.16.1.0 is directly connected, FastEthernet1/0
     10.0.0.0/24 is subnetted, 1 subnets
C       10.0.0.0 is directly connected, FastEthernet0/0
O    192.168.2.0/24 [110/2] via 10.0.0.2, 00:39:14, FastEthernet0/0
O    192.168.3.0/24 [110/2] via 10.0.0.2, 00:39:14, FastEthernet0/0

第九步，客户机验证
PC1：
PC1#ping 172.16.1.1 Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 212/296/384 ms

PC2：
PC2#ping 172.16.1.1 Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 192/338/492 ms