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The Problem

My computer will only connect to the internet if it has an address assigned via DHCP. Otherwise if I statically set an address, it will be ignored and use the Windows default address of 169.254.X.X.

What I have tried

  • Switching from Static to DHCP and back again.
  • Unplugging my computer's ethernet cable.
  • Turning my router back off and on.
  • Rebooting my computer.
  • Disabling my anti-virus (Clam Sentinel).

    Possible causes?

  • A malformed update from Windows?
  • My router is starting to fail?
  • My networking card is starting to fail?
  • My switch is starting to fail?

    Why I need it solved

    Several applications require a static IP address to function properly. For example, OBS requires a static IP to stream, and I host Garry's Mod from time to time, and would prefer to not update the port forwarding frequently.

    Other Info

  • SSH'd into my Linux Mint server (has a static IP), and pinged out. No issue.
  • Gave my Android 8, Blu Vivo XL 4 phone a static IP on the network. Unable to connect.
  • The computer is connected via Ethernet, not WiFi.
  • Running Windows 10 Professional, activated.
  • Using a basic networking switch. Not smart, not PoE.

    Should I have further updates, I will edit them into this post.

    Thanks in advance.

    • Improve this question
    2
    • 2
      1) Is the static address one still in the DHCP pool? 1) Why not set the static on your DHCP server, thereby removing it from the pool?
      – Tetsujin
      Commented Aug 28, 2021 at 7:50
    • 1
      Please include in your post the static IP address and the DHCP segment configured for the router (address range & netmask).
      – harrymc
      Commented Aug 28, 2021 at 9:33

    1 Answer 1

    Reset to default
    0

    So the router's DHCP was the culprit. Some how the DHCP address pool on the router had expanded beyond what I had configured it for, and another device had some how got the same address.

    Thanks anyway for all your help.

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