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NS3550-8T-2S Industrial Managed Switch User Manual
448
Chapter 8
Troubleshooting
This chapter contains information to help you solve issues. If the industrial managed
switch is not functioning properly, ensure that it was set up according to the instructions
in this manual.
Issue
Solution
The per port LED does not illuminate
Check the cable connection of the industrial
managed switch.
Poor performance
Check the full duplex status of the industrial
managed switch. If the industrial managed
switch is set to auto negotiation mode and the
partner is set to half duplex, then the
performance will be poor.
The industrial managed switch doesn't connect
to the network
1. Check the per port LED on the industrial
managed switch.
2. Try another port on the industrial managed
switch.
3. Make sure the cable is installed properly.
4. Make sure the cable is the right type.
5. Turn off the power. After a while, turn on
power again.
The per port LED illuminates, but the traffic is
irregular
Check that the attached device is not set to
dedicate full duplex. Some devices use a
physical or software switch to change duplex
modes. Auto-negotiation may not recognize this
type of full-duplex setting.
The industrial managed switch does not power
up.
1. Check to ensure that the AC power cord is
not faulty and that it is inserted properly.
2. If the cord is inserted correctly, replace the
power cord.
3. Check that the AC power source is working
by connecting a different device in place of
the switch.
4. If that device does not work, check the AC
power