1、实验拓扑
2、实验配置
R1配置
interface FastEthernet0/0
no shut
interface FastEthernet0/0.10
encapsulation dot1Q 10
ip address 192.168.10.254 255.255.255.0
interface FastEthernet0/0.20
encapsulation dot1Q 20
ip address 192.168.20.254 255.255.255.0
S2配置
vlan 10
vlan 20
interface FastEthernet0/1
switchport access vlan 10
switchport mode access
spanning-tree portfast
interface FastEthernet0/2
switchport access vlan 20
switchport mode access
spanning-tree portfast
interface FastEthernet0/3
switchport mode trunk
switchport nonegotiate
3、实验测试
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