HP J3100B Installation And Configuration Manual page 153

LED Error Indications (continued)
LED State
1, 2, 3, 4 Off
(Port Enabled)
(green)
Rx and Tx Off
Port Receive
and Transmit
(green)
Dx Off
(Full Duplex)
Diagnostic Tip
The port is not enabled or the link is not operational.
If the Switch 2000 port is either a 10Base-T port on an HP J3102A Ethernet Module or
100Base-TX port (HP J3192A or B transceiver) on an HP J3191A 100Base-T Module
connected to a hub or another switch, then the port is preconfigured to operate as
MDI-X. In this case, ensure that the port on the connected hub or other switch is either
an MDI port connected by a straight-through cable, or (if the port on the other device
is an
MDI-X port) that a crossover cable is used to connect them.
Note: If an Ethernet port is using an AUI or 10Base2 transceiver, the port is enabled
regardless of whether a connection is present.
The Rx and Tx LEDs should be on or flashing as packets are forwarded from or to other
ports. If the LEDs do not flash, check the Port Enabled (1, 2, 3, 4) LED. If it is off, the
port is not enabled. If the Port Enabled LED is on, then verify that the physical network
configuration is correct. Check the console interface for proper configuration and
operation.
If the Port Enabled LED (above) is on, then the Full Duplex (Dx) LED should be on for
Ethernet 10Base-T ports that have been configured for full-duplex mode. The Dx LED
should be off for Ethernet 10Base-T ports that are disabled or have been configured
for half-duplex operation (the default). Check the port configuration in the console
interface to ensure that the Mode parameter for the port has been set to Full Duplex.
Note: Full-duplex should be used only if it is also configured and supported on the
media and in the device to which the port is connected.
Troubleshooting
Diagnosing with the LEDs
9-5