【正文】
FastEthernet 0/2 RouterA(config)int f0/1RouterA(configifFastEthernet 0/1)no iaa ^ % Invalid input detected at 39。 marker.RouterA(configifFastEthernet 0/1)no ip addRouterA(configifFastEthernet 0/1)exitRouterA(config)int f0/2RouterA(configifFastEthernet 0/2)no ip addRouterA(configifFastEthernet 0/2)exitRouterA(config)exitRouterA*Jun 15 15:57:17: %SYS5CONFIG_I: Configured from console by consoleRouterAshow ip int bInterface IPAddress(Pri) OK? StatusSerial 3/0 no address YES DOWNSerial 4/0 no address YES DOWNFastEthernet 0/0 no address YES DOWNFastEthernet 0/1 no address YES DOWNFastEthernet 0/2 no address YES DOWNRouterAcon tEnter configuration mands, one per line. End with CNTL/Z.RouterA(config)int f0/0RouterA(configifFastEthernet 0/0)no ip addRouterA(configifFastEthernet 0/0)exitRouterA(config)int f0/RouterA(configsubif)ip add % Configuring IP routing on a LAN subinterface is only allowed if thatsubinterface is already configured as vLAN.RouterA(configsubif)ip add % Configuring IP routing on a LAN subinterface is only allowed if thatsubinterface is already configured as vLAN.RouterA(configsubif)ip add % Configuring IP routing on a LAN subinterface is only allowed if thatsubinterface is already configured as vLAN.RouterA(configsubif)ip add % Configuring IP routing on a LAN subinterface is only allowed if thatsubinterface is already configured as vLAN.RouterA(configsubif)exitRouterA(config)exitRouterA*Jun 15 15:59:48: %SYS5CONFIG_I: Configured from console by consoleRouterAshow ip int bInterface IPAddress(Pri) OK? StatusSerial 3/0 no address YES DOWNSerial 4/0 no address YES DOWNFastEthernet 0/ no address YES DOWNFastEthernet 0/0 no address YES DOWNFastEthernet 0/1 no address YES DOWNFastEthernet 0/2 no address YES DOWNRouterAcon tEnter configuration mands, one per line. End with CNTL/Z.RouterA(config)int f0/RouterA(configsubif)no shutRouterA(configsubif)ip add % Configuring IP routing on a LAN subinterface is only allowed if thatsubinterface is already configured as vLAN.RouterA(configsubif)eRouterA(configsubif)enRouterA(configsubif)encRouterA(configsubif)encapsulation dRouterA(configsubif)encapsulation dot1Q% Inplete mand.RouterA(configsubif)encapsulation dot1Q 5RouterA(configsubif)ip add RouterA(configsubif)no shutRouterA(configsubif)exitRouterA(config)int f0/RouterA(configsubif)encRouterA(configsubif)encapsulation dRouterA(configsubif)encapsulation dot1Q 10RouterA(configsubif)ip add RouterA(configsubif)no shutRouterA(configsubif)exitRouterA(config)int s4/0RouterA(configifSerial 4/0)ip add RouterA(configifSerial 4/0)no shutRouterA(configifSerial 4/0)exitRouterA(config)exitRouterA*Jun 15 16:02:42: %SYS5CONFIG_I: Configured from console by consoleRouterA路由器2:RouterBen 14Password:RouterBshow ip int bInterface IPAddress(Pri) OK? StatusSerial 3/0 Serial 4/0 FastEthernet 0/ no address YES DOWNFastEthernet 0/ no address YES DOWNFastEthernet 0/0 FastEthernet 0/ FastEthernet 0/ FastEthernet 0/1 FastEthernet 0/2 RouterBcon tEnter configuration mands, one per line. End with CNTL/Z.RouterB(config)int s4/0RouterB(configifSerial 4/0)ip add Ro