What does bridge mode actually do on a router?

Beyond providing a local network that you and your family can use at home, routers are nifty little gadgets with a variety of lesser-known features. For example, did you know that you can connect a USB hard drive to most routers to share storage? What if you did the same thing with a printer? There are a lot of cool things you probably didn’t know your Wi-Fi router can do. Another such feature is called bridge mode. Bridge mode effectively disables the routing function of the device so that it acts as a simple relay. It takes the Internet connection, usually from an Ethernet port, and transmits it to other devices and the rest of the network, precisely like a bridge or path. It can even convert that wired input to wireless input, streaming wirelessly to nearby devices, like a traditional router.

Now you’re probably wondering why on earth would you disable a router? Good question! There are several very specific reasons why you might want to do this, mainly when you have multiple routers.

Routers are designed to help manage the internal network by issuing and managing IP addresses, firewalls, and other network functions. Having two routers working side by side on the same network, both struggling to handle these basic network functions, creates many problems. You also end up with a configuration called Double NAT; your network is split into two separate networks and devices may have difficulty communicating with each other. While you need both a modem and a router, and it’s important to understand what they actually do, you definitely don’t need two routers. Quite the contrary, in fact.

The most obvious reason to turn a router into a bridge is that you want to use your own private router, one that you purchased and would probably work much better than an ISP-issued device, but traditionally you can’t. Some ISPs offer router and modem combinations with both devices bundled into a single unit. The problem is that if you want to use your own router, you still need the ISP’s modem. However, you can’t just connect a router to the other side of this combo unit to magically create a unified network.

To fix this, you put the ISP’s router into bridge mode (you can do this through the admin dashboard) which then forwards the connection between the modem and the new router you prefer to use. Likewise, if you want to set up a mesh network in your home, with a single unit broadcasting to satellites, to improve performance and signal in your property, you can configure the ISP Gateway as a bridge.

Configuring a router as a bridge also has other practical uses. The router can act as a sort of extender, in cases where you may want coverage in dead zones or hot spots. You can also use the router to plug in devices that only have an Ethernet port, allowing them to enjoy a wireless connection. You can even achieve this with your old routers successfully after upgrading to a new one. Since you need to replace your router every four to five years or so, you may already have a few of them collecting dust.

There are many routers from many different brands, so the exact steps vary from model to model. Most companies follow the same basic design principles, especially when it comes to accessing the administrative dashboard of your router and network. To access this dashboard, you simply enter the local IP address of the router (usually 192.168.0.1), and you must do this from the browser of a device connected to the same network as the router.

If this is your first login, you may need to use a default password to access, which you should change as soon as possible, ideally right after logging in. Default passwords are usually very simple and are often listed in your router’s documentation, either in the user manual or on a small card. On some models, like some TP-Link smart routers, you may be able to use an app to change and adjust settings rather than connecting directly.

Once you’re there, navigate through the settings to something like Advanced > System > Operating Mode and look for an option called “Bridge Mode” or “Access Point Mode”, which are the same thing. On Netgear, it’s under Advanced > Advanced Setup > Wireless Bridge. When this is enabled, the incoming Internet connection is simply streamed wirelessly from the adjusted router as is. Make sure to click Apply or Save to confirm the changes. You may also need to restart the router for the changes to take effect.