Enterasys a2h123-24 User Manual

Troubleshooting Checklist

4-6

Troubleshooting

If the device is not working properly, refer to 

 for a checklist of problems, 

possible causes, and recommended actions to resolve the problem.

All LEDs are OFF.

Loss of power.

Ensure that the SecureStack A2 was 
installed properly according to the 
installation instructions in 

Ensure that the power cords are 
connected properly to an active power 
source that meets the AC input 
specifications for this switch.

Ensure that the AC power cord is not 
damaged. Replace the power cord with a 
known good one.

All LEDs are OFF

Possible mismatch in code 
between the master and the 
device. If the switch does not 
have the same code as the 
stack master the switch will not 
join the stack and all LEDs will 
remain off.

Connect to the console port and type 
“show switch”. If a code mismatch is the 
cause, the output of the above command 
will show “code version mismatch”. 

Disconnect the switch from the stack and 
load the necessary code to match the 
stack master.

No local 
management 
startup screen.

Incorrect terminal setup.

Refer to the SecureStack A2 
Configuration Guide for proper setup 
procedures.

Improper Console cable 
pinouts.

Refer to 

 for proper Console 

port pinouts.

Corrupt firmware image, or 
hardware fault.

If possible, attempt to download the image 
to the device again. Refer to the 
SecureStack A2 Configuration Guide for 
details.

Cannot navigate 
beyond startup 
screen.

Improper Community Names 
Table.

Refer to the SecureStack A2 
Configuration Guide for the Community 
Names Table setup.