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C
HAPTER
 72: S
YSTEM
 M
AINTENANCE
 
AND
 D
EBUGGING
By default, the summer time is not set.
Displaying the Status 
and Information of 
the System
The switch provides the display command for displaying the system status and 
statistics information.
For the display commands related to each protocols and different ports, refer to 
the relevant chapters. The following display commands are used for displaying 
the system status and the statistics information.
Perform the following configuration in any view.
System Debugging
Enabling/Disabling the 
Terminal Debugging
The switch provides various ways for debugging most of the supported protocols 
and functions, which can help you diagnose and locate the errors.
The following ON/OFF switches can control the outputs of the debugging 
information:
Protocol debugging ON/OFF switch controls the debugging output of a 
protocol.
Terminal debugging ON/OFF switch controls the debugging output on a 
specified user screen.
The figure below illustrates the relationship between two ON/OFF switches.
Table 800   Set the summer time
Operation 
Command 
Set the name and range of the summer time 
clock summer-time zone-name { one-off | 
repeating } start-time start-date end-time 
end-date offset-time 
Remove the setting of the summer time 
undo clock summer-time
Table 801   The display commands of the system
Operation 
Command 
Display the system clock 
display clock 
Display the system version 
display version 
Display the status of the debugging 
display debugging [ interface { interface
type interface-number ] [ module-name ] 
Display the information about the optical 
module connected with a in-position optical 
port on current frame 
display fiber-module
or
display fiber-module [ interface-type 
interface-number ]