System Maintaining Example - 3Com 4500G Family Configuration Manual

To do...
Enable debugging for a
specified module
Display the enabled debugging
functions
The debugging commands are usually used by administrators in diagnosing network failure.
Output of the debugging information may reduce system efficiency, especially during execution of
the debugging all command.
After completing the debugging, you are recommended to use the undo debugging all command
to disable all the debugging functions.
You must configure the debugging, terminal debugging and terminal monitor commands first
to display the detailed debugging information on the terminal. For the detailed description on the
terminal debugging and terminal monitor commands, refer to Information Center Commands in
the System Volume.

System Maintaining Example

Network requirements
The IP address of the destination device is 10.1.1.4.
Display the Layer 3 devices involved while packets are forwarded from the source device to the
destination device.
Configuration procedure
<Sysname> tracert 10.1.1.4
traceroute to 10.1.1.4 (10.1.1.4) 30 hops max, 40 bytes packet
1 128.3.112.1
2 128.32.216.1
3 128.32.136.23
4 128.32.168.22
5 128.32.197.4
6 131.119.2.5
7 129.140.70.13
8 129.140.71.6
9 129.140.81.7
10 10.1.1.4
The above output shows that nine Layer 3 devices are used from the source to the destination device.
debugging { all [ timeout
time ] | module-name [ option ] }
display debugging [ interface
interface-type
interface-number ]
[ module-name ]
19 ms 19 ms 0 ms
39 ms 39 ms 19 ms
39 ms 40 ms 39 ms
39 ms 39 ms 39 ms
40 ms 59 ms 59 ms
59 ms 59 ms 59 ms
99 ms 99 ms 80 ms
139 ms 239 ms 319 ms
220 ms 199 ms 199 ms
239 ms 239 ms 239 ms
Use the command...
1-4
Remarks
Required
Disabled by default
Available in user view
Optional
Available in any view