Cabletron Systems 2E48-27R Benutzerhandbuch

Chapter 4: Troubleshooting

If the 2E4X-27R 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, but 
the baud rate has not yet 
been sensed.

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

Terminal setup is not 
correct.

Refer to 

 for proper 

setup procedures.

Improper console cable 
pinouts.

Refer to Appendix A for 
proper console port pinouts.

Cannot contact the 
device from in-band 
management.

Improper Community 
Names Table.

Refer to 

for Community Names Table 
setup.

IP address not 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.

Loop condition detected.

1. Review network design 

and delete unnecessary 
loops. 

2. Call the Cabletron Systems 

GCC if the problem 
continues.

User parameters (IP 
address, Device and 
Module name, etc.) 
were lost when the 
2E4X-27R 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 

GCC if the problem 
continues.