VLAN trunk实验

模拟器：Cisco Packet Tracer

 SW1配置：

注：

 Switch(config)#no ip domain-lookup（关闭域名解析，防止输错命令时域名解析）

Switch(config-if)#switch mode trunk（原来设备默认封装了dot1q协议，所以就没有再封装） 

Switch>en
Switch#	
Switch#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)#
Switch(config)#no ip domain-lookup（关闭域名解析，防止输错命令时域名解析）
Switch(config)#
Switch(config)#vlan 10
Switch(config-vlan)#name PC1
Switch(config-vlan)#exit
Switch(config)#vlan 20
Switch(config-vlan)#name PC2
Switch(config-vlan)#exit
Switch(config)#	
Switch(config)#interface f0/1
Switch(config-if)#switch mode access
Switch(config-if)#switch access vlan 10
Switch(config-if)#exit
Switch(config)#interface f0/2
Switch(config-if)#switch mode access
Switch(config-if)#switch access vlan 20
Switch(config-if)#exit
Switch(config)#do show vlan brief

VLAN 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, Gig0/1, Gig0/2
10   PC1                              active    Fa0/1
20   PC2                              active    Fa0/2
1002 fddi-default                     active    
1003 token-ring-default               active    
1004 fddinet-default                  active    
1005 trnet-default                    active    
Switch(config)#interface f0/3	
Switch(config-if)#switch mode trunk（原来设备默认封装了dot1q协议，所以就没有再封装）
Switch(config-if)#exit
Switch(config)#

SW2配置：

Switch>enable
Switch#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)#
Switch(config)#vlan 10
Switch(config-vlan)#name PC4
Switch(config-vlan)#exit
Switch(config)#vlan 20
Switch(config-vlan)#name pc3
Switch(config-vlan)#exit
Switch(config)#
Switch(config)#interface f0/3
Switch(config-if)#
Switch(config-if)#switch mode access
Switch(config-if)#switch access vlan 10
Switch(config-if)#exit
Switch(config)#
Switch(config)#interface f0/2
Switch(config-if)#
Switch(config-if)#switch mode access
Switch(config-if)#switch access vlan 20
Switch(config-if)#
Switch(config-if)#exit
Switch(config)#interface f0/1
Switch(config-if)#switch mode trunk
Switch(config-if)#exit
Switch(config)#do show int trunk
Port        Mode         Encapsulation  Status        Native vlan
Fa0/1       on           802.1q         trunking      1

Port        Vlans allowed on trunk
Fa0/1       1-1005

Port        Vlans allowed and active in management domain
Fa0/1       1,10,20

Port        Vlans in spanning tree forwarding state and not pruned
Fa0/1       1,10,20
Switch(config)#do show vlan brief

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    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, Gig0/1, Gig0/2
10   PC4                              active    Fa0/3
20   pc3                              active    Fa0/2
1002 fddi-default                     active    
1003 token-ring-default               active    
1004 fddinet-default                  active    
1005 trnet-default                    active    
Switch(config)#

实现各个VLAN之间PC的互通：