setp 1
交换机配置如下 :(图中R2)
SW2# vlan da
SW2(vlan)# vlan 1
VLAN 1 modified:
SW2(vlan)# vlan 2
VLAN 2 added:
    Name: VLAN0002
SW2(vlan)#vlan 3
VLAN 3 added:
    Name: VLAN0003
SW2(vlan)# exit
APPLY completed.
Exiting....
SW2#conf t
SW2(config)# int fa0/0
SW2(config-if)# sw mod trun
SW2(config-if)# no sh
*Mar   1 00:05:22.335: %DTP-5-TRUNKPORTON: Port Fa0/0 has become dot1q trunk
SW2(config-if)# exit
SW2(config)# int fa0/1
SW2(config-if)# switchport mode access
SW2(config-if)# sw access vlan 2
SW2(config-if)# exit
SW2(config)# int fa0/2
SW2(config-if)# sw mod acc
SW2(config-if)# sw acc vlan 3
SW2(config-if)# exit
SW2(config)# do show ip int b
Interface                   IP-Address       OK? Method Status                 Protocol
FastEthernet0/0             unassigned       YES unset   up                     up      
FastEthernet0/1             unassigned       YES unset   up                     up      
FastEthernet0/2             unassigned       YES unset   up                     up      
FastEthernet0/3             unassigned       YES unset   up                     down    
FastEthernet0/4             unassigned       YES unset   up                     down    
FastEthernet0/5             unassigned       YES unset   up                     down    
FastEthernet0/6             unassigned       YES unset   up                     down    
FastEthernet0/7             unassigned       YES unset   up                     down    
FastEthernet0/8             unassigned       YES unset   up                     down    
FastEthernet0/9             unassigned       YES unset   up                     down    
FastEthernet0/10            unassigned       YES unset   up                     down    
         
SW2(config)# exit   
SW2# show vlan-switch br
 
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
2     VLAN0002                          active     Fa0/1
3     VLAN0003                          active     Fa0/2
1002 fddi-default                      active    
1003 token-ring-default                active    
1004 fddinet-default                   active    
1005 trnet-default                     active    
SW2# show int trunk
 
Port       Mode          Encapsulation   Status         Native vlan
Fa0/0      on            802.1q          trunking       1
 
Port       Vlans allowed on trunk
Fa0/0      1-1005
 
Port       Vlans allowed and active in management domain
Fa0/0      1-3
 
Port       Vlans in spanning tree forwarding state and not pruned
Fa0/0      1-3
 
 
setp 2
 
路由器配置如下 :
R1(config)# int fa0/0
R1(config-if)# no sh    // 物理接口要 UP
R1(config-if)# exit
R1(config)#
*Mar   1 00:06:59.023: %LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
*Mar   1 00:07:00.023: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
R1(config)# do show ip int b
Interface                   IP-Address       OK? Method Status                 Protocol
FastEthernet0/0             unassigned       YES unset   up                     up      
R1(config)# int fa0/0.2
R1(config-subif)# ip add 192.168.20.254 255.255.255.0     // 要求先进行封装
 
% Configuring IP routing on a LAN subinterface is only allowed if that
subinterface is already configured as part of an IEEE 802.10, IEEE 802.1Q,
or ISL vLAN.
R1(config-subif)# encapsulation dot1Q 2                        // 对应对相应的 vlan
R1(config-subif)# ip add 192.168.20.254 255.255.255.0
R1(config-subif)# no sh
R1(config-subif)# int fa0/0.3
R1(config-subif)# encapsulation dot1Q 3
R1(config-subif)# ip add 192.168.30.254 255.255.255.0
R1(config-subif)# no sh
R1# show ip int b
Interface                   IP-Address       OK? Method Status                 Protocol
FastEthernet0/0             unassigned       YES unset   up                     up      
FastEthernet0/0.2           192.168.20.254   YES manual up                     up      
FastEthernet0/0.3           192.168.30.254   YES manual up                     up