HP J9574A Installation And Getting Started Guide

5-7
Troubleshooting
Diagnosing with the LEDs
7
The port may be
improperly
configured, or
the port may be in
a “blocking”
state by the
normal operation
of the Spanning
Tree, LACP, or
IGMP features.
Use the switch console to see if the port is part of a dynamic trunk (through the LACP
feature) or to see if Spanning Tree is enabled on the switch, and to see if the port may
have been put into a “blocking” state by those features. The show lacp command displays
the port status for the LACP feature; the show spanning-tree command displays the port
status for Spanning Tree.
Also check the Port Status screen using the show interfaces command to see if the port
has been configured as “disabled”.
Other switch features that may affect the port operation include VLANs and IGMP. Use
the switch console to see how the port is configured for these features.
For software troubleshooting tips, see the chapter “Troubleshooting” in the Management
and Configuration Guide for your switch at
www.hp.com/networking/support.
Make sure also, the device at the other end of the connection is indicating a good link to
the switch. If it is not, the problem may be with the cabling between the devices or the
connectors on the cable.
8
A redundant
power supply
has experienced
a fault.
(At least one power supply must be operating properly.) Check the power supply to make
sure it is plugged in to an active power source. If this is ok but the LEDs are still blinking,
the power supply may have failed. Try unplugging and then replugging the power supply.
If the fault light is still blinking, replace the power supply.
9
The switch has
overheated.
Check to ensure the fans are functioning correctly.
10
The port may
have an internal
hardware failure,
or the port may
be denied PoE
power or
detecting an
external PD fault.
Check the port for a hardware failure, this may require a reboot of the switch. Check the
port for correct PoE configuration and check for PoE allocation. Also check the external
PD for a fault.
11
A redundant
power supply is
not connected to
an active AC
power source.
(At least one power supply must be operating properly.) Connect the unplugged power
supply to an AC power source, using a supported power cord for your country/region.
Tip Problem Solution

HP J9574A Specifications

General

Brand	HP
Model	J9574A
Category	Switch
Language	English