Leds - 3Com SuperStack 3 4950 Getting Started Manual

LEDs

Table 5 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 5 LED behavior
LED Color
Port Status LEDs
Packet Yellow
Off
Status Green
Green flashing
Yellow
Yellow flashing
Off
Module Status LEDs
Green
Yellow
Yellow flashing
Off
Unit LEDs
1–4 Green
Off
Power/Self Test LED
Green
Green flashing
Yellow
Off
"Checking for Correct Operation of LEDs"
Indicates
Packets are being transmitted/received on the port.
No packets are being transmitted/received on the port.
A high speed (1000 Mbps) link is present, and the port
is enabled.
A high speed (1000 Mbps) link is present, but the port
is disabled.
A low speed (10/100 Mbps) link is present, and the
port is enabled.
A low speed (10/100 Mbps) link is present, but the port
is disabled.
No link is present.
The Module is installed and supported. The Link Status
has been determined for a single port Module.
The Module is installed and supported. The Module
has multi-ports or there is no Link for a single port
Module.
The Module is installed but not supported. Note that
the 4950 unit will continue to operate normally.
The Module is not installed.
When the Switch can form a stack with other Switch
4950 units the LED indicates the position of the unit in
the stack and that a link is present.
The Switch is stand-alone or the link is not present.
The Switch is powered-up and operating normally.
The Switch is either downloading software or is
initializing (which includes running a Power On Self
Test).
The Switch has failed its Power On Self Test.
The Switch is not receiving power.
Switch 4950 — Front View Detail
on
15
page 23.