Troubleshooting Chart - NETGEAR ProSAFE M4200 Series Hardware Installation Manual

Troubleshooting Chart

The following table lists symptoms, causes, and solutions for possible problems.
Table 3. Troubleshooting chart
Symptom
Power LED is off.
Combined
speed/activity LED or
an individual speed
LED and an individual
activity LED are 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/activity LED or
an individual speed
LED and an individual
activity LED are
blinking continuously on
all connected ports and
the network is disabled.
Troubleshooting
Managed Switch Series M4200
Cause
No power is received.
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.
Solution
• Check the power cable connections at the
switch and the power source.
• Ensure 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.
• Ensure 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 ensuring that only one path
exists from any networked device to any other
networked device. After you connect to the
switch web management interface, you can
configure the Spanning Tree Protocol (STP) to
prevent network loops.
• Verify that the cabling is correct.
• Ensure that all connectors are securely
positioned in the required ports. It is possible
that equipment was accidentally
disconnected.
Break the loop by ensuring that only one path
exists from any networked device to any other
networked device. After you connect to the
switch web management interface, you can
configure the Spanning Tree Protocol (STP) to
prevent network loops.
33 Hardware Installation Guide