Netgear M4200-10MG-PoE+ (GSM4210P) - Multigigabit Managed Switch with 8*2.5G and 2x10G SFP+ Layer 3 하드웨어 매뉴얼

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.