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56
C
HAPTER
4: P
ROBLEM
S
OLVING
Solving Problems
Indicated by LEDs
If the LEDs on the Switch indicate a problem, refer to the list of suggested
solutions below.
The Power LED does not light
Check that the power cable is firmly connected to the Switch and to the
supply outlet. If the connection is secure and there is still no power, you
may have a faulty power cord or an internal fault. Firstly, check the power
cord by:
■
testing it in another device
■
connecting a working power cord to the ‘problem’ device
then contact your supplier for advice.
On powering-up, the Power/Self Test LED lights yellow
Either:
■
The Switch unit has failed its Power On Self Test (POST) because of an
internal problem. The fault type will be indicated on the unit LEDs.
Contact your supplier for advice.
or
■
A port has failed and has been automatically disabled. You can verify
this by checking that the Port LED Status LED is quickly flashing
Yellow. If a port fails the Switch passes its Power On Self Test and
continues to operate normally.
A Port LED Status LED is quickly flashing yellow
The port has failed and has been automatically disabled. The Switch
passes its Power On Self Test and continues to operate normally, even if
one or more ports are disabled.
A link is connected and yet the Status LED for the port does not
light
Check that:
■
The Switch and the device at the other end of the link (or cable) are
connected securely.
■
The devices at both ends of the link are powered-up
■
The quality of cable is satisfactory
DUA1720-3AAA06.book Page 56 Thursday, June 5, 2003 4:01 PM
Содержание 3C17205 - SuperStack 3 Switch 4400 PWR
Страница 6: ...INDEX REGULATORY NOTICES DUA1720 3AAA06 book Page 6 Thursday June 5 2003 4 01 PM ...
Страница 12: ...12 ABOUT THIS GUIDE DUA1720 3AAA06 book Page 12 Thursday June 5 2003 4 01 PM ...
Страница 22: ...22 CHAPTER 1 INTRODUCING THE SUPERSTACK 3 SWITCH 4400 DUA1720 3AAA06 book Page 22 Thursday June 5 2003 4 01 PM ...
Страница 34: ...34 CHAPTER 2 INSTALLING THE SWITCH DUA1720 3AAA06 book Page 34 Thursday June 5 2003 4 01 PM ...
Страница 62: ...62 CHAPTER 4 PROBLEM SOLVING DUA1720 3AAA06 book Page 62 Thursday June 5 2003 4 01 PM ...
Страница 74: ...74 APPENDIX B PIN OUTS DUA1720 3AAA06 book Page 74 Thursday June 5 2003 4 01 PM ...
Страница 80: ...80 APPENDIX C TECHNICAL SPECIFICATIONS DUA1720 3AAA06 book Page 80 Thursday June 5 2003 4 01 PM ...
Страница 90: ...DUA1720 3AAA06 book Page 90 Thursday June 5 2003 4 01 PM ...