Leds - 3Com 3C17700 - SuperStack 3 Switch 4900 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 LEDs
Packet Yellow
Off
Status Green
Green flashing
Yellow
Yellow flashing
Off
Module LEDs
Packet Yellow
Off
Status Green
Yellow
Yellow flashing
Yellow flashing
(fast)
Off
Unit LEDs
1–4 Green
Off
Power/Self Test LED
Green
"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 (100 Mbps on 4900, 10/100 Mbps on
4924/4950) link is present, and the port is enabled.
(Not applicable on 4900 SX.)
A low speed (100 Mbps on 4900, 10/100 Mbps on
4924/4950) link is present, but the port is disabled.
(Not applicable on 4900 SX.)
No link is present.
Packets are being transmitted/received on the port.
No packets are being transmitted/received on the port.
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 Switch will continue to operate normally.
A port on the Module has failed POST and has been
automatically disabled.
The Module is not installed.
Determines the identity of the Switch when
interconnected to another Switch to create an XRN
Distributed Fabric and that a link is present.
A fault has occurred.
The Switch is powered-up and operating normally.
Switch — Front View Detail
on page
17
27.