Cabletron Systems 2H253-25R - Manual (Page 45)

Troubleshooting Checklist
Troubleshooting 4-5
4.2 TROUBLESHOOTING CHECKLIST
If the 2H253-25R is not working properly, refer to Table 4-2 for a checklist of possible problems,
causes, and recommended actions to resolve the problem.
Table 4-2 Troubleshooting Checklist
Problem Possible Cause Recommended Action
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
Chapter 3 .
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. Refer to Appendix A 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
Section B.3 for instructions to clear
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
Appendix B for instructions on how
to set the mode switch to reset the
Community Names to their default
values.