Additional Troubleshooting Suggestions; Network Adapter Cards; Configuration; Switch Integrity - NETGEAR GS752TXS Hardware Installation Manual

Symptom
ACT LED is flashing
continuously on all
connected ports and the
network is disabled.
A unit is linked to a stack,
but does not join the
stack.

Additional Troubleshooting Suggestions

If the suggestions in Troubleshooting Chart do not resolve the problem, refer to the
troubleshooting suggestions in this section.

Network Adapter Cards

Ensure the network adapter cards installed in the PCs are in working condition and the
software driver has been installed.

Configuration

If problems occur after altering the network configuration, restore the original connections
and determine the problem by implementing the new changes, one step at a time. Ensure
that cable distances, repeater limits, and other physical aspects of the installation do not
exceed the Ethernet limitations.

Switch Integrity

If required, verify the integrity of the switch by resetting the switch. To reset the switch,
remove the AC power from the switch and then reapply AC power. If the problem continues,
contact NETGEAR technical support. In North America, call 1-888-NETGEAR. If you are
outside of North America, please refer to the support information card included with your
product.

Auto-Negotiation

The RJ-45 ports negotiate the correct duplex mode, speed, and flow control if the device at
the other end of the link supports auto negotiation. If the device does not support auto
negotiation, the switch determines only the speed correctly, and the duplex mode defaults to
half-duplex.
28 | Appendix : Troubleshooting
GS752TXS Smart Switch Hardware Installation Guide
Cause
A network loop
(redundant path) has
been created.
The stacking ports of the
new unit are configured
differently from the stack,
or the unit is configured
as a stand-alone unit.
Solution
Break the loop by ensuring that there is only one path
from any networked device to any other networked
device. After you connect to the switch management
interface, you can configure the Spanning Tree
Protocol (STP) to prevent network loops.
Remove the unit from the stack. Use the Web
Management to configure the unit as a stackable unit,
with combo links used as the stacking ports. Refer to
the GS752TXS Smart Switch Software Administration
Manual for information about using the Web interface.