Cabletron Systems pmn User Manual

Chapter 4: Troubleshooting

If the 2M46-04R 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 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.

Review network design and 
delete unnecessary loops. 
Call the Cabletron Systems 
Global Call Center if the 
problem continues.

User parameters (IP 
address, Device and 
Module name, etc.) 
were lost when the 
2M46-04R 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.

Reenter the lost parameters 
as necessary. Call the 
Cabletron Systems Global 
Call Center if problem 
continues.