NETGEAR GS728TPv3 Hardware Installation Manual page 35

24-Port and 48-Port Gigabit Ethernet PoE+ Smart Switches with 4 SFP Ports
Troubleshooting chart
The following table lists symptoms, possible causes, and possible solutions for problems
that might occur.
Table 5. Troubleshooting chart
Symptom
The Power LED is off.
When the LED Mode button is set to
Ethernet Mode, the port LED for a port is off
although the port is connected to a
powered-on device.
A file transfer is slow or performance is
degraded.
A segment or device is not recognized as
part of the network.
When the LED Mode button is set to
Ethernet Mode, the port LEDs for all
connected ports are blinking continuously
and the network is disabled.
Troubleshooting
Possible Cause Possible Solution
Power is not • Check the power cable connections at the
supplied to the switch and the power source.
switch.
• Make sure that all cables are used
correctly and comply with the Ethernet
specifications.
The port connection • Check the crimp on the connectors and
is not working. make sure that the plug is properly
inserted and locked into the port at both
the switch and the connecting device.
• Make sure that all cables are used
correctly and comply with the Ethernet
specifications.
• Check for a defective port, cable, or
module by testing them in an alternate
environment where all products are
functioning.
One possible cause Break the loop by making sure that only one
is that a broadcast path exists from any networked device to
storm occurred and any other networked device. After you
that a network loop connect to the switch local browser UI, you
(redundant path) was can configure the Spanning Tree Protocol
created. (STP) to prevent network loops.
One or more devices • Verify that the cabling is correct.
are not properly
• Make sure that all connectors are securely
connected, or
positioned in the required ports. It is
cabling does not
possible that equipment was accidentally
meet Ethernet
disconnected.
guidelines.
A network loop Break the loop by making sure that only one
(redundant path) was path exists from any networked device to
created. any other networked device. After you
connect to the switch local browser UI, you
can configure the Spanning Tree Protocol
(STP) to prevent network loops.
35 Hardware Installation Guide