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Troubleshooting

How to Change DHCP Settings on Your Router

DHCP is how your router automatically assigns IP addresses to devices. You can change the address range or lock specific devices to a fixed IP.

Updated 2026

  1. 1

    Log in to the router admin panel

    Open your gateway IP in a browser and sign in.

  2. 2

    Find DHCP settings

    Look for DHCP, LAN, or Network in the menu. Most routers show the DHCP range here.

  3. 3

    Change the IP range

    Adjust the start and end addresses — for example, 192.168.1.100 to 192.168.1.200. This controls how many devices can connect.

  4. 4

    Create a DHCP reservation

    Find the Address Reservation or Static DHCP option. Enter the device's MAC address and the IP you want to permanently assign to it.

  5. 5

    Save and apply

    Save changes. Devices may need to reconnect to receive the updated settings.

Frequently Asked Questions

What happens if DHCP runs out of addresses?
New devices can't join the network. Increase the DHCP range or disconnect unused devices.
Why would I assign a fixed IP to a device?
It's essential for port forwarding, remote desktop and printers — anything that needs to be reachable at a predictable address.