Troubleshooting Chart - NETGEAR MS108EUP Hardware Installation Manual

8-port Ultra60 PoE++ Multi-Gigabit (2.5G) Ethernet Plus Switch MS108EUP

Troubleshooting chart

The following table lists symptoms, possible causes, and possible solutions for problems
that might occur.
Table 4. Troubleshooting chart
Symptom
The Power LED is off.
The left and right port LEDs for a port
are 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.
The left and right port LEDs for all
connected ports are blinking
continuously and the network is
disabled.
Troubleshooting
Possible Cause
Power is not supplied to
the switch.
The port connection is not
working.
One possible cause is that
a network loop (redundant
path) was created and that
a broadcast storm
occurred.
One or more devices are
not properly connected, or
cabling does not meet
Ethernet guidelines.
A network loop (redundant
path) was created.
28
Possible Solution
• Check the power cable connections at the
switch and the power source.
• Make sure that all cables are used
correctly and comply with the 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 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.
Break the loop by making sure that only one
path exists from any networked device to
any other networked device. After you
connect to the switch device UI, you can
configure the Spanning Tree Protocol (STP)
to prevent network loops.
• Verify that the cabling is correct.
• Make sure that all connectors are securely
positioned in the required ports. It is
possible that equipment was accidentally
disconnected.
Break the loop by making sure that only one
path exists from any networked device to
any other networked device. After you
connect to the switch device UI, you can
configure the Spanning Tree Protocol (STP)
to prevent network loops.
Hardware Installation Guide