Troubleshooting Checklist - Enterasys A4H124-24 Hardware Installation Manual

Troubleshooting Checklist

Troubleshooting Checklist
If the device is not working properly, refer to
and recommended actions to resolve the problem.
Table 3-7 Troubleshooting Checklist
Problem Possible Cause
All LEDs are OFF. Loss of power.
No local Incorrect terminal setup.
management
Improper Console cable
startup screen.
pinouts.
Corrupt firmware image, or
hardware fault.
Cannot navigate Improper Community Names
beyond startup Table.
screen.
Cannot contact the IP address not assigned.
switch through in-
band management.
Port is disabled.
No link to device.
Port(s) goes into Loop condition detected.
standby for no
apparent reason.
User parameters (IP Clear NVRAM was set using
address, device and CLI commands.
module name, etc.)
were lost when the
switch power was
cycled.
3-6 Troubleshooting
Table 3-7 for a checklist of problems, possible causes,
Recommended Action
Ensure that the switch was installed properly according to the
installation instructions in Chapter
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.
Refer to the Enterasys A4 CLI Reference for proper setup procedures.
Refer to Figure 2-15 on page 2-21 for proper Console port pinouts.
If possible, attempt to download the image to the device again. Refer to
the Enterasys A4 CLI Reference for details.
Refer to the Enterasys A4 CLI Reference for the Community Names
Table setup.
Refer to the Enterasys A4 CLI Reference for the IP address
assignment procedure.
This is normal if the switch is a Member in a stack.
If operating as a standalone switch or as the Manager in a stack,
enable the port. Refer to the Enterasys A4 CLI Reference for
instructions to enable/disable ports.
Verify that all network connections between the network management
station and the device are valid and operating.
If the problem continues, contact Enterasys Networks for technical
support.
Verify that Spanning Tree is enabled. Refer to the Enterasys A4 CLI
Reference for the instructions to set the type of STA.
Review the network design and delete unnecessary loops.
If the problem continues, contact Enterasys Networks for technical
support.
Reenter the lost parameters as necessary. Refer to the Enterasys A4
CLI Reference for the instructions to configure the switch using CLI
commands.
If the problem continues, contact Enterasys Networks for technical
support.
2, Installation.