Checking Port Leds - 3Com 3C2000 User Manual

Checking Port LEDs

The NIC has four LEDs. When the driver has been loaded and the cables are
connected properly, the appropriate speed LED lights and the data transfer (ACT)
LED lights (if data traffic is present).
Before the speed LEDs can provide troubleshooting information, the NIC must be
connected to the network (see "Connecting the Network Cable" on page 5) and the
network driver for your particular operating system must be installed.
1 Verify that the NIC driver has been installed and that the NIC is connected to the
network.
2 Check to see that the NIC LEDs operate as described in the following table:
LED State
1000 On
Off
100 On
Off
10 On
Off
ACT Blinking
On
Off
Description
Good Gigabit Ethernet (1000 Mbps) link.
No Gigabit Ethernet (1000 Mbps) link; possible link at
different speed, possible bad cable, bad connector, or
configuration mismatch.
Good Fast Ethernet (100 Mbps) link.
No Fast Ethernet (100 Mbps) link; possible link at different
speed, possible bad cable, bad connector, or configuration
mismatch.
Good Ethernet (10 Mbps) link.
No Ethernet (10 Mbps) link; possible link at different speed,
possible bad cable, bad connector, or configuration
mismatch.
Brief bursts of data detected on the port.
Streams of data detected on the port.
No data detected on the port.
Checking Port LEDs
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