H3C Technologies H3C S7500E Series Switches - Manual (Page 20)

1-8
# No such a route exists. Use the tracert command to determine failed nodes.
system-view
[DeviceA] ip ttl-expires enable
[DeviceA] ip unreachables enable
[DeviceA] tracert 1.1.2.2
traceroute to 1.1.2.2(1.1.2.2) 30 hops max,40 bytes packet, press CTRL_C to bre
ak
1 1.1.1.2 14 ms 10 ms 20 ms
2 * * *
3 * * *
4 * * *
5
The above output shows that no available route exists between Device A and Device C; an available
router exists between Device A and Device B; an error occurred on the connection between Device
B and Device C. In this case, you can use the debugging ip icmp command to enable ICMP
debugging on Device A and Device C to check whether the devices send or receive the specified
ICMP packets, or you can use the display ip routing-table command to display whether a route
exists between the two devices.