FAQ: How do I configure my network settings to connect to the EyeLink Host PC?

[Sam]

The Stimulus Display PC's IP address and subnet must be in the same range as the Host PC for the two computers to properly communicate in a peer-to-peer fashion.

The default IP address of the EyeLink Host PC is 100.1.1.1. Therefore, the Stimulus Display PC typically uses the IP address 100.1.1.2 with a subnet mask of 255.255.255.0.

Important Considerations for Data Collection:

• Disable all secondary network connections (e.g., Wi-Fi, secondary Ethernet adapters).
  
• Properly configure or temporarily disable any network security or monitoring software to ensure unimpeded communication between the Host PC and the Display PC.
  

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If the Display PC is a Windows 10 PC:

1. Connect the Host PC to the Display PC using a single Ethernet cable, without any intervening devices.
   
2. Go to the Control panel -> Network and Sharing Center -> Ethernet (1).
   
3. Click the Properties button to open the Ethernet Properties (2).
   
4. Select the Internet Protocol Version 4 (TCP / IPv4) listing (3).
   
5. Click the Properties button to open the TCP / IPv4 Properties (4).
   
6. Select the "Use the following IP address:".
   
7. Enter the following information:
   • IP address: 100.1.1.2
     
   • Subnet mask: 255.255.255.0
     
   • Leave the Default gateway field blank.
     
8. Click OK to apply changes.
   

   

If the Display PC is a Windows 11 PC:

1. Connect the Host PC to the Display PC via an ethernet cable.
   
2. Go to the Start Menu -> Settings -> Network and Sharing Center (1) .
   
3. Click Advanced Options (2).
   
      
4. Under the Advanced Network settings click the arrow next to your ethernet device to expand its options (1).
   
5. Under "more adapter options" and select Edit (2).
   
6. Double click on the "Internet Protocol Version 4 (TCP/IPv4)" (3).
   
7. Select the "Use the following IP address:" (4).
   
8. Enter the following information:
   • IP address: 100.1.1.2
     
   • Subnet mask: 255.255.255.0
     
   • Leave the Default gateway field blank.
     
9. Click OK to apply changes.
   

   

If the Display PC running macOS:

1. Go to System Settings > Network (or System Preferences > Network on older macOS versions).
   
2. Click the Action button (... or ⚙️) at the bottom of the network list.
   
3. Choose Set Service Order.
   
4. Click OK.
   
      
5. In the main Network window, select your dedicated Ethernet adapter from the list on the left.
   
6. Change the "Configure IPv4" dropdown menu to "Manually."
   
7. Enter the following information:
   • IP address: 100.1.1.2
     
   • Subnet mask: 255.255.255.0
     
   • You can leave the "Router" and "DNS" fields blank.
     
8. Click "Apply" to save settings.
   
      
9. Click the Advanced... button.
   
10. Go to the Hardware tab.
    
11. Set the "Duplex" setting to "full-duplex." (Important: Make sure you do not select the "full-duplex, flow-control" option.)
    
12. Click OK and then Apply.
    

• Additional steps for configuring macOS to communicate with the EyeLink 1000 or EyeLink II:
  The hardware on these older systems does not support modern gigabit (1000 Mbps) connection speeds. While most computers detect this automatically, macOS—especially on Mac Minis—often fails to auto-detect the correct speed and must be configured manually.
  
  1. Complete all steps listed above
     
  2. Go back to the Network > Advanced... > Hardware tab.
     
  3. Find the Speed setting.
     
  4. Change it from "Automatically" to "100baseTX."
     
  5. Click OK and then Apply.
     

If the Display PC is running Ubuntu Linux:

1. Open the Settings application. You can find it by searching in the desktop launcher.
   
      
2. Navigate to the Network tab in the left-hand menu.
   
3. Find your Wired connection and click the gear icon ⚙️ next to it.
   
4. In the window that appears, select the IPv4 tab.
   
5. Set the "IPv4 Method" to Manual.
   
6. Enter the following information:
   • IP address: 100.1.1.2
     
   • Subnet mask: 255.255.255.0
     
   • Leave the Default gateway field blank.
     
7. Click the Apply button in the top-right corner to save the changes.