Cabletron Systems 2E43-51R User Manual

Chapter 4: Troubleshooting

If the 2E43-51 is not working properly, refer to 

of possible problems, 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.

Check the installation.

No Local 
Management 
Password screen.

Autobaud is enabled.

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

Terminal setup is not 
correct.

Refer to 

 for proper 

setup procedures.

Improper console cable 
used.

Refer to 

 for 

proper console port pinouts.

Cannot contact the 
2E43-51 from 
in-band 
management.

Using incorrect 
Community Name.

Refer to 

for Community Name setup.

The 2E43-51 does not 
have an IP address 
assigned.

Refer to 

 for IP 

address assignment 
procedure.

Port is disabled.

Enable port.

No link to device.

Check link to device.

Port(s) goes into 
standby for no 
apparent reason.

The 2E43-51 detected a 
loop condition.

1. Review network design 

and delete unnecessary 
loops. 

2. Call the Cabletron 

Systems Global Call 
Center if the problem 
continues.

User parameters (IP 
address, Device and 
Module name, etc.) 
were lost when the 
2E43-51 power was 
cycled or the front 
panel RESET button 
was pressed.

Mode switch (7), NVRAM 
Reset, was changed 
sometime before either 
cycling power or 
pressing the RESET 
button causing the 
user-entered parameters 
to reset to factory default 
settings.

1.  Reenter the lost 

parameters as necessary. 

2. Call the Cabletron 

Systems Global Call 
Center if the problem 
continues.