林作倉

Switch0(config)#interface gigabitethernet 1/1

Switch0(config-if)#switchport mode trunk

Router>en

Router#conf t

Enter configuration commands, one per line.  End with CNTL/Z.

Router(config)#interface fastethernet 0/0

Router(config-if)#no sh 路由器所有的介面預設都是關閉的

Router(config-if)#

%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up

Router(config-if)#int fastethernet 0/0.10  將子界面的編號與vlan編號設定為相同

Router(config-subif)#

%LINK-5-CHANGED: Interface FastEthernet0/0.10, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0.10, changed state to up

Router(config-subif)#encapsulation dot1q 10  啟用802.1q封裝，並對應vlan10

Router(config-subif)#ip address 192.168.1.254 255.255.255.0  指定子界面ip，使它成為vlan10的Gateway。

Router(config)#int fastethernet 0/0.20

Router(config-subif)#

%LINK-5-CHANGED: Interface FastEthernet0/0.20, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0.20, changed state to up

Router(config-subif)#encapsulation dot1q 20

Router(config-subif)#ip address 192.168.2.254 255.255.255.0

Switch0>sh int trunk

Port        Mode         Encapsulation  Status        Native vlan

Gig1/1      on           802.1q         trunking      1

Port        Vlans allowed on trunk

Gig1/1      1-1005

Port        Vlans allowed and active in management domain

Gig1/1      1,10,20

Port        Vlans in spanning tree forwarding state and not pruned

Gig1/1      1,10,20

PC>ping 192.168.2.1

Pinging 192.168.2.1 with 32 bytes of data:

Request timed out.

Reply from 192.168.2.1: bytes=32 time=0ms TTL=127

Reply from 192.168.2.1: bytes=32 time=0ms TTL=127

Reply from 192.168.2.1: bytes=32 time=0ms TTL=127

Ping statistics for 192.168.2.1:

    Packets: Sent = 4, Received = 3, Lost = 1 (25% loss),

Approximate round trip times in milli-seconds:

    Minimum = 0ms, Maximum = 0ms, Average = 0ms