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## 划分VLANS1(config)#vlan 10S1(config-vlan)#exitS1(config)#int f0/1S1(config-if)#switchport access vlan 10S1(config-if)#int f0/2S1(config-if)#switchport access vlan 20## 配置VLAN10和VLAN20网关S1(config)#int vlan 10S1(config-if)#no shutdownS1(config-if.

前面另个丢包为RO和R1的ARP缓存表没有PC0和PC1的MAC地址，所以丢弃并通过ARP广播更新缓存表：Router>show arpProtocol Address Age (min) Hardware Addr Type InterfaceInternet 192.168.1.254 - 0060.2F7C.A401 ARPA GigabitEthernet0/0Internet 192.168.3.1 ..