Cabletron Systems 2H253-25R Manuale Utente

Troubleshooting Checklist

Troubleshooting

If the 2H253-25R is not working properly, refer to 

causes, and recommended actions to resolve the problem.

All LEDs are 
OFF.

Loss of power.

Check for proper connection of the 
power cable and its access to a live 
outlet.

Installed improperly.

Ensure that the 2H253-25R was 
installed properly according to the 
installation instructions in 

No Local 
Management 
Password screen.

Autobaud is enabled, but the 
baud rate has not yet been 
detected.

Press ENTER (RETURN) (may take 
up to four times).

Terminal setup is not correct.

Refer to the SmartSwitch Series 
2E253, 2H252, 2H253, and 2H258 
Local Management User’s Guide for 
proper setup procedures.

Improper console cable pinouts.

 for proper 

console port pinouts.

Corrupt firmware image, or 
hardware fault.

If possible, attempt to download the 
image to the 2H253-25R again. Refer 
to 

NVRAM.

Cannot navigate 
beyond Password 
screen.

Improper Community Names 
Table.

1. Refer to the SmartSwitch Series 

2E253, 2H252, 2H253, and 2H258 
Local Management User’s Guide for 
the Community Names Table setup.

2. If you have forgotten the 

Community Names, refer to 

to set the mode switch to reset the 
Community Names to their default 
values.