H3C Technologies H3C S6300 Series Switches - Manual (Page 18)

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Figure 3 Network diagram
Configuration procedure
1. Configure the IP addresses for devices as shown in Figure 3 .
2. Configure a static route on Device A.
<DeviceA> system-view
[DeviceA] ip route-static 0.0.0.0 0.0.0.0 1.1.1.2
[DeviceA] quit
3. Use the ping command to test connectivity between Device A and Device C.
<DeviceA> ping 1.1.2.2
Ping 1.1.2.2(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
--- Ping statistics for 1.1.2.2 ---
5 packet(s) transmitted,0 packet(s) received,100.0% packet loss
The output shows that Device A and Device C cannot reach each other.
4. Use the tracert command to identify failed nodes:
# Enable sending of ICMP timeout packets on Device B.
<DeviceB> system-view
[DeviceB] ip ttl-expires enable
# Enable sending of ICMP destination unreachable packets on Device C.
<DeviceC> system-view
[DeviceC] ip unreachables enable
# Execute the tracert command on Device A.
<DeviceA> tracert 1.1.2.2
traceroute to 1.1.2.2(1.1.2.2) 30 hops at most,40 bytes each packet, press CTRL_C to
break
1 1.1.1.2 (1.1.1.2) 1 ms 2 ms 1 ms
2 * * *
3 * * *
4 * * *
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<DeviceA>
The output shows that Device A can reach Device B but cannot reach Device C, which indicates
that an error has occurred on the connection between Device B and Device C.
5. Use the debugging ip icmp command on Device A and Device C to verify that they can send and
receive the specific ICMP packets, or use the display ip routing-table command to verify that there
is a route from Device A to Device C.
Device A Device B Device C
1.1.1.1/24 1.1.1.2/24 1.1.2.1/24 1.1.2.2/24