Chapter 9: Troubleshooting
126
Use the SHOW SYSTEM ENVIRONMENT command in the
Privileged Exec mode to verify that the fan is operating correctly.
Verify that the location of the switch allows for adequate airflow.
The unit will shut down if it is in danger of overheating.
Problem 8:
The Switch ID LED on the front of the switch is flashing the
letter “F.”
Solutions:
One or more of the following problems has occurred:
A cooling fan has failed.
One of the power supplies has failed.
The input voltage on one or both of the power supplies is outside
the normal operating range.
The internal temperature of the switch has exceeded the normal
operating range and the switch may shut down.
Contact your Allied Telesis sales representative for assistance.
Problem 9:
The AT-x510-28GPX, AT-x510L-28GP, AT-x510-52GPX, or
AT-x510L-52GP Switch is not providing power to a PoE device.
Solutions:
Try the following:
Review the PD’s documentation to confirm that the device
supports Mode A of the IEEE 802.3at standard. Mode A is one of
two modes that define the connector pins that deliver the power
from the port on the line card to the PD. In Mode A, the power is
carried on pins 1, 2, 3, and 6 on the RJ-45 port, the same pins that
carry the network traffic. The second mode, Mode B, defines pins
4, 5, 7, and 8 as the power carriers. The AT-x510-28GPX,
AT-x510L-28GP, AT-x510-52GPX, and AT-x510L-52GP Switches
do not support Mode B. Most powered devices are designed to
accept power by either mode, but some legacy devices may only
support one mode. This can be verified by reviewing the device’s
documentation or data sheet. Legacy devices that only support
Mode B will not work with the switches.
Check that the device’s power requirements do not exceed 30 W.
This can be verified by reviewing the device’s documentation or
data sheet.
Verify that you are using the appropriate category of twisted-pair
cable by referring to Table 3 on page 28.
Use the management software on the switch to determine whether
PoE is enabled on the port. The default setting for PoE is enabled.
Summary of Contents for AT-x510-28GPX
Page 10: ...Tables 10 ...
Page 14: ...Preface 14 ...
Page 48: ...Chapter 1 Overview 48 ...
Page 70: ...Chapter 3 Beginning the Installation 70 ...
Page 84: ...Chapter 4 Installing the Switches on a Table or in an Equipment Rack 84 ...
Page 128: ...Chapter 9 Troubleshooting 128 ...