9. TROUBLE SHOOTING
This chapter contains information to help you solve problems. If the Ethernet Switch is not functioning
properly, make sure the Ethernet Switch was set up according to instructions in this manual.
■ The Link LED is not lit
Solution:
Check the cable connection and remove duplex mode of the Ethernet Switch
■ Some stations cannot talk to other stations located on the other port
Solution:
Please check the VLAN settings, trunk settings, or port enabled / disabled status.
■ Performance is bad
Solution:
Check the full duplex status of the Ethernet Switch. If the Ethernet Switch is set to full duplex and
the partner is set to half duplex, then the performance will be poor. Please also check the in/out rate
of the port.
■ Why the Switch doesn't connect to the network
Solution:
1. Check the LNK/ACT LED on the switch
2. Try another port on the 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
■ 100Base-TX port link LED is lit, but the traffic is irregular
Solution:
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.
■ Switch does not power up
Solution:
1. AC power cord not inserted or faulty
2. Check that the AC power cord is inserted correctly
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