通过Ping命令排除路由器故障

Router1#Ping 34.0.0.4

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 34.0.0.4, timeout is 2 seconds:

.....

Success rate is 0 percent (0/5)

在Router1上无法Ping通Router4的接口，通过使用DEBUG命令来获得更多的信息，便于进一步的分析：

Router1#debug ip packet

IP packet debugging is on

Router1#Ping 34.0.0.4

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 34.0.0.4, timeout is 2 seconds:

5d21h: IP: s=12.0.0.1 (local), d=34.0.0.4, Len 100, unroutable.

5d21h: IP: s=12.0.0.1 (local), d=34.0.0.4, Len 100, unroutable.

……

Success rate is 0 percent (0/5)