H3C Technologies H3C SR8800 - Manual (Page 19)

7
Figure 4 Network diagram
Configuration procedure
# Use the ping command to display whether Device A and Device C can reach each other.
<DeviceA> ping 1.1.2.2
PING 1.1.2.2: 56 data bytes, press CTRL_C to break
Request time out
Request time out
Request time out
Request time out
Request time out
--- 1.1.2.2 ping statistics ---
5 packet(s) transmitted
0 packet(s) received
100.00% packet loss
# Device A and Device C cannot reach each other. Use the tracert command to determine failed nodes.
<DeviceA> 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
<DeviceA>
The output shows that Device A and Device C cannot reach other, Device A and Device B can reach each
other, and an error occurred on the connection between Device B and Device C. In this case, 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 use the display ip routing-table command to
display whether Device A and Device C can reach each other.