3Com S7906E Configuration Manual page 2451

4 * * *
5
<DeviceA>
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.
1-8