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Cannot ping the instrument LAN in MassLynx or UNIFI - WKB23149

Article number: 23149


  • No communication to the instruments
  • Cannot ping the instrument LAN


  • MassLynx
  • P5x0 PC or P7x0 PC


The bridged LAN cards are causing an IP conflict.


  1. Exit MassLynx or UNIFI.
  2. In the control panel, go to Network and Internet > Network and Sharing > Change adapter settings. bridged connection2.PNG    
  3. Right-click on Local Area Connection 1 and select Remove from Bridge.
  4. Right-click on Local Area Connection 2 and select Remove from Bridge.
  5. Right-click on Instrument LAN (Mac Bridge Miniport) and select Delete.
  6. Make note of which Local Area Connection (1 or 2) does not have a red X on it. This should be the one connected to the instruments. Right-click on it and rename it the "Instrument LAN".
  7. Browse to the Waters DCHP server.
    • In MassLynx, it is C:\Program Files (x86)\Waters Instruments\Waters DHCP Server Configuration.exe.
    • In UNIFI, it is Install Drive:\Program Files\Waters\UNIFI\Server\Bin\Waters DHCP Server Configuration.exe.
  8. In the server drop-down menu, select Configuration Wizard.
  9. Select the Instrument LAN, and then click Next.
  10. Retain the Default or Alternate IP address selection (whichever was previously selected), and click Next.
  11. Select Finish, and then reboot the PC.
  12. Log back in to Windows and do the following:
    • If in MassLynx: Power-cycle the LC, do an electronic reboot of the MS, wait five minutes, and then go to MassLynx.
    • If in UNIFI: Wait five minutes, log in to UNIFI, power-cycle the LC, and then do an electronic reboot of the MS and wait for them to populate in UNIFI.




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