那是否有設定檔? 如果照你在packet tracert上的架構圖, 請你在R2上: Router>en Router#conf t Enter configuration commands, one per line. End with CNTL/Z. Router(config)#hostname R2 R2(config)#int f0/0 R2(config-if)#ip addre 192.168.20.1 255.255.255.0 R2(config-if)#no sh R2(config-if)#^Z R2# %SYS-5-CONFIG_I: Configured from console by console wr Building configuration... [OK] R2#sh run int f0/0 ^ % Invalid input detected at '^' marker.
R2#ping 192.168.20.254
Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 192.168.20.254, timeout is 2 seconds: .!!!! Success rate is 80 percent (4/5), round-trip min/avg/max = 0/0/1 ms
R2#ping 192.168.20.254
Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 192.168.20.254, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 0/0/2 ms