H3c-technologies H3C WX5500E Series Access Controllers Manuel d'utilisateur télécharger pdf (Page 14)

Ste

Command

Remarks

4. Display the enabled

debugging functions.

display debugging [ interface

interface-type interface-number ]

[ module-name ] [ | { begin |

exclude | include }

regular-expression ]

Optional.

Available in any view.

NOTE:

You must configure the debugging, terminal debugging and terminal monitor commands before you can

display the detailed debugging information on the terminal. For more information about the terminal

debugging and terminal monitor commands, see

Network Management and Monitoring Command

Reference

Ping and tracert example

Network requirements

As shown in Figure 4, Device A failed to Telnet to 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 4 Network diagram

Test procedure

1. Use the ping command to test connectivity between Device A and Device C.

<DeviceA> ping 1.1.2.2

PING 1.1.2.2: 56 data bytes, press CTRL_C to break

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.

<DeviceB> system-view

[DeviceB] ip ttl-expires enable

# Enable sending of ICMP destination unreachable packets on Device C.

<DeviceC> system-view

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 103 104

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H3c-technologies H3C WX5500E Series Access Controllers Manuel d'utilisateur Page 14