Switch 3870 — Front View Detail
15
LEDs
Table 4
lists LEDs visible on the front of the Switch, and how to read their
status according to color. For information on using the LEDs for problem
solving, see
“Checking for Correct Operation of LEDs”
on
page 25
.
Table 4
LED behavior
LED
Color
Indicates
Port Status/Packet LEDs
Green
A high speed (1000 Mbps) link is present, and the port
is enabled.
Green flashing
A high speed (1000 Mbps) link is present and active.
Yellow
A low speed (10/100 Mbps) link is present, and the
port is enabled.
Yellow flashing
A low speed (10/100 Mbps) link is present and active.
Green for one
second, Amber
for one second,
then OFF until
operational.
POST in operation, all LEDs perform a one second lamp
test.
Alternate yellow
then green
flashing (fast)
A port has failed a loop back test during POST.
Alternate yellow
then green
flashing
A link is present but the port has been disabled.
Off
No link is present.
Stacking Status LED
Green
The uplink/downlink is operating normally.
Yellow
One-sided connection (one side of the cable is
connected but the other side is not).
Off
No stacking link is present.
Stack Master LED
Green
Master unit - normal stack operation status.
Yellow
Slave unit - normal stack operation status.
Yellow flashing
The system is in arbitration/election status.
Off
The system is not stacked.
DUA1745-0AAA02.book Page 15 Monday, August 9, 2004 11:51 AM
Summary of Contents for SUPERSTACK 3 3870 Series
Page 6: ...DUA1745 0AAA02 book Page 6 Monday August 9 2004 11 51 AM...
Page 30: ...30 CHAPTER 2 INSTALLING THE SWITCH DUA1745 0AAA02 book Page 30 Monday August 9 2004 11 51 AM...
Page 54: ...54 CHAPTER 4 PROBLEM SOLVING DUA1745 0AAA02 book Page 54 Monday August 9 2004 11 51 AM...
Page 66: ...66 APPENDIX B PIN OUTS DUA1745 0AAA02 book Page 66 Monday August 9 2004 11 51 AM...
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