Leds - 3Com SUPERSTACK 3 3870 Series Getting Started Manual

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
Table 4 LED behavior
LED Color
Port Status/Packet LEDs
Green
Green flashing
Yellow
Yellow flashing
Green for one
second, Amber
for one second,
then OFF until
operational.
Alternate yellow
then green
flashing (fast)
Alternate yellow
then green
flashing
Off
Stacking Status LED
Green
Yellow
Off
Stack Master LED
Green
Yellow
Yellow flashing
Off
"Checking for Correct Operation of LEDs"
Indicates
A high speed (1000 Mbps) link is present, and the port
is enabled.
A high speed (1000 Mbps) link is present and active.
A low speed (10/100 Mbps) link is present, and the
port is enabled.
A low speed (10/100 Mbps) link is present and active.
POST in operation, all LEDs perform a one second lamp
test.
A port has failed a loop back test during POST.
A link is present but the port has been disabled.
No link is present.
The uplink/downlink is operating normally.
One-sided connection (one side of the cable is
connected but the other side is not).
No stacking link is present.
Master unit - normal stack operation status.
Slave unit - normal stack operation status.
The system is in arbitration/election status.
The system is not stacked.
Switch 3870 — Front View Detail
on
15
page 25.