DHCP

DHCP is the service, usually built into your router, that automatically gives every device on your network an IP address.

What it means for you

It is why devices connect without any manual setup. Only one device on a network should act as the DHCP server, so a second router doing routing behind a gateway can cause conflicts, and a DHCP reservation can keep a camera or hub on the same address.

Guides on this topic

• Use Your Own Router With an Xfinity or AT&T Gateway

  Add your own router or mesh behind an Xfinity or AT&T gateway without double NAT: Bridge Mode, IP Passthrough and what changes, from the providers' support pages.

• eero Setup and Troubleshooting

  What each eero light means, red light and offline fixes, adding an eero and resetting it.

• TP-Link Deco Setup and Troubleshooting

  Deco light meanings, red light and offline unit fixes, adding a Deco and connecting smart devices.

Related terms

• IP address
• DNS
• Double NAT
• Router

← All glossary terms · Search all guides for “DHCP”

Definitions are short and general. For model-specific details, check your device maker’s own documentation.