Interpreting Led Status; Interpreting Hub Status Leds - HP 10Base-T Hub 24M Manual

Most problems with the hub can be diagnosed using the LEDs on its front
panel. The following section describes the normal LED pattern during self-
test, and LED patterns that indicate error conditions on the hub.

Interpreting LED Status

Two types of LEDs exist on the hub. They are:
Hub Status LEDs. These LEDs reflect certain conditions that exist on the
hub at large and are not explicitly referring to a given port.
Port Status LEDs. These LEDs reflect basic conditions (for example, Link
Beat being enabled) that exist on a specific port.
Status information for both are described in the following tables.

Interpreting Hub Status LEDs

The hub status LEDs indicate whether the hub is functioning properly. The
following table provides LED port information for the HP J3301A and HP
J3303A.
LED LED Color
Power Green
Activity Green
Fault Orange
Collision Orange
Meaning of LED
On indicates the hub is receiving power.
Off indicates the hub is not receiving power.
Flickering (rapid flashing) indicates a packet is
being transmitted to or from a port. Normally, the LED
appears to flicker. In heavy traffic, it may appear on
all the time.
Off indicates no packet is being transmitted to or
from a port.
On indicates an error has been detected on the hub.
Off indicates no error has been detected on the hub.
Port LED Flash on for.75 seconds and turn off for .75
seconds, indicating the port is partitioned. The Fault
LED does NOT illuminate when ports are partitioned.
On indicates a collision is detected. If it appears on
continuously (with no flicker), it is a possible
indicator of a network fault or an improperly
terminated cable.
Off indicates no collision has been detected.
Troubleshooting
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