Netgear M4300-28G (GSM4328S) - Stackable Managed Switch with 24x1G and 4x10G including 2x10GBASE-T and 2xSFP+ Layer 3 硬件手册

If the suggestions in the troubleshooting chart do not resolve the problem, see the following 
troubleshooting suggestions:

Network adapter cards. Ensure that the network adapters that are installed in the 
computers are in working condition and the software driver was installed.

Configuration. If problems occur after you alter the network configuration, restore the 
original connections and determine the problem by implementing the new changes, one 
step at a time. Ensure that cable distances, repeater limits, and other physical aspects of 
the installation do not exceed the Ethernet limitations.

Switch integrity. If necessary, verify the integrity of the switch by resetting it. To reset the 
switch, disconnect the AC power from the switch and then reconnect the AC power. If the 
problem continues, contact NETGEAR technical support. For more information, visit the 
support website at 

.

Autonegotiation. The RJ-45 ports negotiate the correct duplex mode, speed, and flow 

control if the device at the other end of the link supports autonegotiation. If the device 
does not support autonegotiation, the switch determines only the speed correctly, and the 
duplex mode defaults to half-duplex.

The Gigabit Ethernet ports negotiate speed, duplex mode, and flow control if the attached 
device supports autonegotiation.

A segment or device is 

not recognized as part 
of the network.

One or more devices are not 
properly connected, or cabling does 
not meet Ethernet guidelines.

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.

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.

A network loop (redundant path) 

was created.

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.

A unit is linked to a 

stack but does not join 
the stack.

The stacking ports of the new unit 
are configured differently from the 
stack, or the unit is configured as a 
standalone unit.

Remove the unit from the stack. Use the web 
management interface to configure the unit as a 
stackable unit, with combo links used as the 
stacking ports.