H3C Technologies H3C S5120 Series Switches - Manual (Page 625)

1-6
Configuring System Debugging
Output of the debugging information may reduce system efficiency. The debugging commands are
usually used by administrators in diagnosing network failure. After completing the debugging, disable
the corresponding debugging function, or use the undo debugging all command to disable all the
debugging functions.
Output of debugging information is related to the configurations of the information center and the
debugging commands of each protocol and functional module. Displaying the debugging information on
a terminal (including console or VTY) is a common way to output debugging information. You can also
output debugging information to other destinations. For the detailed configurations, refer to Information
Center Commands. By default, you can output debugging information to a terminal by following these
steps:
To do… Use the command… Remarks
Enable the terminal monitoring
of system information
terminal monitor
Optional
The terminal monitoring on the
console is enabled by default
and that on the monitoring
terminal is disabled by default.
Available in user view
Enable the terminal display of
debugging information
terminal debugging
Required
Disabled by default
Available in user view
Enable debugging for a
specified module debugging { all [ timeout
time ] | module-name [ option ] }
Required
Disabled by default
Available in user view
Display the enabled debugging
functions
display debugging [ interface
interface-type
interface-number ]
[ module-name ]
Optional
Available in any view
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.
Ping and Tracert Configuration Example
Network requirements
As shown in Figure 1-4 , Device A failed to telnet Device C. Now it is required to determine whether an
available route exists between Device A and Device C. If no such a route exists, you need to locate the
failed nodes in the network.