2-3 
You can use the following commands to enable the two switches. 
Table 2-3 Enable debugging and terminal display for a specific module 
Operation  Command  Description 
Enable system debugging for 
specific module 
debugging module-name 
[ debugging-option ] 
Required 
Disabled for all modules by 
default. 
Enable terminal display for 
debugging 
terminal debugging 
Required 
Disabled by default. 
 
 
The output of debugging information affects the system operation. Disable all debugging after you finish 
the system debugging. 
 
Displaying Debugging Status 
Table 2-4 Display the current debugging status in the system 
Operation  Command  Description 
Display all enabled 
debugging on the 
switch 
display debugging [ unit unit-id ] 
[ interface interface-type 
interface-number ] [ module-name ] 
You can execute the display 
command in any view. 
 
Displaying Operating Information about Modules in System 
When an Ethernet switch is in trouble, you may need to view a lot of operating information to locate the 
problem. Each functional module has its corresponding operating information display command(s). You 
can use the command here to display the current operating information about the modules in the 
system for troubleshooting your system. 
Table 2-5 Display the current operation information about the modules in the system. 
Operation  Command  Description 
Display the current 
operation information 
about the modules in the 
system. 
display 
diagnostic-informatio
n 
You can use this command in any view. 
You should execute this command twice to 
find the difference between the two executing 
results, thus helping locate the problem.