ZyXEL Communications ETHERNET SWITCHES ES-1016, User Manual

Dimension ES-1016/ES-1024 Ethernet Switch 

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                                                                                                       Troubleshooting 

Chapter 3

Troubleshooting 

This section describes common problems you may encounter with the switch and possible 

solutions.  

3.1 Introduction 

Troubleshoot the switch using the LEDs to detect problems. 

3.1.1 PWR 

LED 

The PWR LED on the front panel does not light up.  

Table 3-1 Troubleshooting Power LED 

STEPS CORRECTIVE 

ACTION 

1 

Check the connections from your switch to the power source.  Make sure you are using the 
supplied power cord and that you are using an appropriate power source. Refer to the 

Product Specifications 

section.  

2 

Make sure the power source is turned on and that the switch is receiving sufficient power. 

3 

If these steps fail to correct the problem, contact your local distributor for assistance.  

3.1.2  LK/ACT LED  

The LK/ACT LED does not light up when a device is connected.  

Table 3-2 Troubleshooting LK/ACT LED  

STEPS CORRECTIVE 

ACTION 

1 

Verify that the attached device(s) is turned on and properly connected to your switch.  

2 

Make sure the Network Interface Cards (NICs) are working on the attached devices.  

3 

Verify that proper network cable type is used and its length does not exceed 100 meters. 
For more information on network cable types, see the 

Front Panel Connections 

section. 

3.1.3 FD/COL 

LED 

The FD/COL LED blinks.  

Table 3-3 Troubleshooting FD/COL LED  

STEP  

CORRECTIVE ACTION 

0 

Some collisions in the network are normal. If the FD/COL LED blinks continuously, proceed 
to the steps below.  

1 

Verify that proper network cable type is used and its length does not exceed 100 meters. 
For more information on network cable types, see the 

Front Panel Connections 

section.