DHCP (Dynamic Host Configuration Protocol) is the process by which your router automatically hands each device an IP address and other settings (like the DNS servers). You don't type these in — DHCP does it behind the scenes, which is why a new phone or PC just "joins" the network.

Why it matters

If DHCP fails, a device can't get an address and won't reach the internet. You'll see:

  • "No IP address" or "unable to connect".
  • A 169.254.x.x address — that's a special "I couldn't get a real address" (APIPA) address.

Quick fixes

  • Reboot the router — clears its DHCP table and re-issues addresses. The most common fix.
  • Release and renew — in Windows, ipconfig /release then ipconfig /renew in an admin prompt.
  • Forget and rejoin the Wi-Fi (or unplug/replug Ethernet) — forces a fresh DHCP request.

Is it a big problem?

Usually not. A router DHCP hiccup is routine and almost always fixed by a reboot. If it happens constantly, the router or its configuration may be the issue.

A 169.254 address is the tell-tale sign DHCP didn't hand out a real address — point your fixes at the router first, not the PC.