Linksys LGS124P, LGS124P-UK Manual

Resolving problems with unlit LED indicators on the product

LED indicators that do not light up when you connect a computer to a port on a Linksys switch are caused by several factors such as:

1. The Linksys switch is not powered ON
2. Defective Ethernet cable
3. The Ethernet cable is not detected due to incompatibility
4. Defective or disabled Ethernet adapter on the computer
5. The LED indicator of the switch is defective
6. The Linksys switch is defective

To resolve problems with unlit LEDs on a Linksys hub or switch, follow the instructions below:

The unit is not powered ON

Before checking cable connections, make sure that you have connected the power adapter of the switch to its power port located on the back panel and that it is plugged in to a power outlet.

NOTE: The switch models SE1500, SE2500, SE2800 and SE4008 have a LED button that turns the device ON or OFF. The switch will still work even if the LEDs are switched OFF.

Defective Ethernet cable

To check if the cable is working or not, try connecting the cable from one (1) port on the switch to another and check if the corresponding LED port status indicators lit up. Otherwise, use another cable to isolate the issue. Make sure that the cable is tightly inserted when connecting to any of the Ethernet ports on the switch.

QUICK TIP: If you do not have an extra Ethernet cable, you may purchase from a local electronic shop.

The Ethernet cable is not detected due to incompatibility

Some of the previous models of switches don't have the capability to automatically detect the type of cable being used; whether crossover or straight-through. If you have this type of switch, a straight-through Ethernet cable is used to connect a computer to a switch or a router to a switch. For switch to switch connections, a crossover cable is used.

NOTE: The numbered ports on the Linksys SE1500, SE2500 and SE2800 switches have auto MDI/MDI-X (straight-through or crossover) cable detection capabilities. This means that you can use any type of cable and it will automatically be detected.

Defective or disabled Ethernet adapter on the computer

Another possible reason why the light indicator on the port does not light up is because it does not detect a connection from the Ethernet adapter on your computer. To check if the Ethernet adapter of your computer is functioning properly:

1. Access your computer's device manager by right-clicking the My Computer icon on your Desktop and then select Manage.
   
2. Select Device Manager and on the right pane, select Network adapters.
   
3. Under Network adapters, you will see the Ethernet adapters installed on your computer. Right-click on a particular adapter and select Properties.
   NOTE: You will see from this window the status of your network adapter if it is working properly or not. For Ethernet adapter driver problems, refer to the adapter manual or contact the manufacturer's product support.

The LED indicator of the unit is defective

The LED lights on the ports may not be functioning. However, this does not mean that the switch port itself is defective.

Types of Ethernet Cable used when Connecting the Unit to Another Switch

This article will provide you with information regarding which type of cable should be used to connect a Linksys switch to other devices.
NOTE: All devices mentioned here are compatible with CAT5, CAT5e and CAT6 Ethernet cables.

For the SE1500, SE2500, and SE2800, you may use either straight-through or crossover Ethernet cable because of the auto MDI/MDI-X cable detection feature of the devices.
For the older models EZXS16W, EZXS88W, EZXS55W, EG008W, and EG005W use a crossover Ethernet cable when connecting the switch to another switch and use a straight-through cable when connecting the switch to a router or a computer.

Checking if the router is working properly when connected to the unit

This article will show you how to verify if your router is properly functioning once it is connected to a switch.
Before you verify if the router is working properly, make sure that the switch is connected to the router.
Follow the guidelines below to determine if the Linksys router is working properly when connected to a switch.

Check the LED

Make sure that the LEDs on the switch are lit and that it corresponds to the port where the router is connected to.

Check the IP Address of the connected computer

Make sure that the computer connected to the switch is getting an IP Address from the router or the DHCP server.

Make sure that all computers connected to the unit belong to the same network
The IP Address of each computer in a single network is assigned by the router. Therefore, if you have several computers connected on a switch which happens to be connected to a router, they should belong to a single network.
To test if your router is working, try to ping one computer using another computer in the same network. You should be able to do this if the router is working properly. Your computer's firewall must be disabled as well.

The following Linksys switch models: EZXS16W, EZXS88W, EZXS55W, EG008W, EG005W, SE1500, SE2500 and SE2800 are considered as non-manageable switches. This means that they do not need to be configured before you can use them. Firmware updates are not necessary for the said devices.

Documents / Resources

Download manual

Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.

Download Linksys LGS124P, LGS124P-UK Manual