Appendix B: Troubleshooting; Troubleshooting Chart; Additional Troubleshooting Suggestions; Table B-1. Troubleshooting Chart - NETGEAR ProSafe GSM7312 Hardware Installation Manual

APPENDIX B: TROUBLESHOOTING

This appendix provides information about troubleshooting the NETGEAR Model GSM7312 Managed Layer
3 Gigabit Ethernet Switch.

Troubleshooting Chart

The table below lists symptoms, causes, and solutions of possible problems.

Table B-1. Troubleshooting Chart

Symptom
Label
Link LED is off or intermittent.
File transfer is slow or
performance degradation is a
problem.
A segment or device is not
recognized as part of the network.
FDX LED is blinking yellow
excessively.
ACT LED is flashing continuously
on all connected ports and the
network is disabled

Additional Troubleshooting Suggestions

If the suggestions in Table B-1 do not resolve your problem, refer to the troubleshooting suggestions
below:
Network Adapter Cards
Make sure the network adapter cards installed in the computers are in working condition and the software
driver has been installed.
Cause
No power is received
Port connection is not
working.
Half- or full-duplex setting
on the switch and the
connected device are not
the same.
One or more devices are not
properly connected, or
cabling does not meet
Ethernet guidelines.
Collisions are occurring on
the connected segment.
Duplex modes are
mismatched.
A network loop (redundant
path) has been created (see
Figure 2-3).
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Solution
Check the power cord connections at the
switch and the connected device.
Make sure all cables used are correct and
comply with Ethernet specifications.
Check the crimp on the connectors and make
sure that the plug is properly inserted and
locked into the port at both the switch and the
connecting device.
Make sure all cables used are correct and
comply with Ethernet specifications.
Check for a defective adapter card, cable, or
port by testing them in an alternate
environment where all products are functioning.
Make sure the attached device is set to auto
negotiate.
Verify that the cabling is correct. Be sure all
connectors are securely positioned in the
required ports. Equipment may have been
accidentally disconnected.
Some collisions are normal when the
connection is operating in half-duplex mode.
Recheck the settings of the device attached to
the RJ-45 port. Make sure the attached device
is set to auto negotiate.
Break the loop by ensuring that there is only
one path from any networked device to any
other networked device.