H3C Technologies H3C MSR 50 - Manual (Page 225)

Step Command Remarks
display debugging [ interface
interface-type interface-number ]
[ module-name ] [ | { begin |
exclude | include }
regular-expression ]
Optional. 539. Display the enabled
debugging functions.
Available in any view.
Ping and tracert example
Network requirements
As shown in Figure 65 , Device A failed to Telnet Device C. Determine whether Device A and Device C
can reach each other. If they cannot reach each other, locate the failed nodes in the network.
Figure 65 Network diagram
Configuration procedure
1. Use the ping command to test connectivity between Device A and Device C.
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
The output shows that Device A and Device C cannot reach each other.
2. Use the tracert command to identify failed nodes.
# Enable sending of ICMP timeout packets on Device B.
system-view
[DeviceB] ip ttl-expires enable
# Enable sending of ICMP destination unreachable packets on Device C.
system-view
[DeviceC] ip unreachables enable
# Execute the tracert command on Device A.
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 break
1 1.1.1.2 14 ms 10 ms 20 ms
2 * * *
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