Troubleshooting Chart - NETGEAR M4300-96X Hardware Installation Manual

Troubleshooting Chart

The following table lists symptoms, possible causes, and possible solutions for problems that might occur.
Table 10. Troubleshooting chart
Symptom
A Power LED is off.
Combined speed and activity
LED is off when the port is
connected to a device.
File transfer is slow or
performance is degraded.
A segment or device is not
recognized as part of the
network.
Combined speed and activity
LED is blinking continuously on
all connected ports and the
network is disabled.
A unit is linked to a stack but
does not join the stack.
Fully Managed Stackable Switch M4300-96X
Possible Cause
Power is not supplied to the
switch.
Port connection is not working.
One possible cause is that a
broadcast storm occurred and
that a network loop (redundant
path) was created.
One or more devices are not
properly connected, or cabling
does not meet Ethernet
guidelines.
A network loop (redundant path)
was created.
The stacking ports of the new
unit are configured differently
from the stack, or the unit is
configured as a standalone unit.
Maintenance and Troubleshooting
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, port card, 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 local
browser interface of the switch, 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 local
browser interface of the switch, you can configure
the Spanning Tree Protocol (STP) to prevent network
loops.
Remove the unit from the stack. Use the local
browser interface to configure the unit as a stackable
unit, with combo links used as the stacking ports.
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