HP AdvanceStack 10Base-T Hub-12 Installation And Reference Manual page 75

LED patterns indicating problems
Power Collision Fault Security
ON * Slow OFF
Flash
ON * Slow
Flash
OFF * *
ON * * Rapid
Flash
ON * * Rapid
Flash
ON * ON ON
ON * ON ON
* This LED is not important for the diagnosis
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RPS Exp Port
Slot
* * Slow
Flash
* Slow * *
Flash
* OFF * *
* ON Rapid
Flash
* ON Not
Flashing
* Slow All ON
Flash
(for
more
than 60
sec.
after a
reset
or
power
on)
* ON Variable;
all may
be ON
Diagnostic Tips
The port has been auto-segmented because of too
many collisions. Check cable terminations,
connections, SQE setting on any external
transceivers, and status of attached network devices
for causes of the excess collisions.
The redundant power supply (RPS) may no longer be
providing redundant power. See the documentation
provided with the RPS for troubleshooting.
The hub is not receiving power from the redundant
power supply (RPS) or the cable connection is loose.
If you have an RPS connected, check the cable
connections.
A port security violation has occurred on a hub with
an HP Ethernet SNMP Module. The port is disabled.
Port security parameters are configurable from
HP Interconnect Manager. See the documentation
for that program for more information.
An unauthorized network management station has
attempted to access a hub with an HP Ethernet
SNMP Module.
The HP Ethernet SNMP Module has failed self-test
and/or its firmware code has become corrupted. This
is frequently the result of a failure during
downloading of new code. Repeat the download
process.
If the hub self-test fails again, contact your
HP-authorized LAN dealer or HP representative for
assistance.
Under this condition, the hub will continue its normal
repeater function, but the console and control
capabilities will be limited.
A hub hardware failure was detected during self-
test. Self-test does not complete so the LEDs will
stay on longer than 60 seconds.
Power cycle the hub. If this condition persists, the
hub may have to be replaced. Contact your
HP-authorized LAN dealer or HP representative for
assistance.
Troubleshooting
4-5