Key takeaways
- An Ethernet cable long enough to reach the spot. Cat5e or Cat6 handles gigabit up to 100 meters (328 feet). Powerline or MoCA adapters also work if running a cable is not practical.
- The admin login for both routers, and the main router’s LAN IP address (commonly 192.168.0.1 or 192.168.1.1).
- The main router’s DHCP range, found in its LAN or DHCP settings, for example 192.168.1.100 to 192.168.1.199.
- Ideally, the second router’s firmware updated to the latest version before you begin.
To use a router as an access point, connect an Ethernet cable from a LAN port on your main router to the second router, then either switch the second router into its built-in Access Point mode or, if it has none, give it a fixed IP address on your main network, turn off its DHCP server and plug the cable into one of its LAN ports instead of the WAN port. The second router then stops acting as a router and simply broadcasts Wi-Fi for your existing network, with every device sharing one set of IP addresses and one firewall.
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What “Access Point Router” Means
A router does several jobs in one box: it routes traffic between your internet connection and your home network, hands out IP addresses (DHCP), runs a firewall and NAT, and usually includes a switch and a Wi-Fi radio. An access point does only the last part: it bridges wireless devices onto an existing wired network.
When people say “access point router” they usually mean a router that can be switched into AP mode, or a router being repurposed as an AP. In AP mode the routing, DHCP and firewall functions are disabled, and the device behaves like a Wi-Fi radio plus a network switch attached to your main router.
Access Point vs Extender vs Mesh
This is not the same as using an old router as a wireless repeater. The key difference is the cable.
| Setup | Connection to main router | Typical speed at the remote spot | Added latency | Best for |
|---|---|---|---|---|
| Router as wired access point | Ethernet cable | Close to full Wi-Fi speed of the second router | Under 1 ms | Garage, basement, detached office with a cable run |
| Wireless extender or repeater | Wi-Fi | Often 30 to 50 percent of the main signal | Several ms or more | Quick fix where no cable is possible |
| Mesh with wireless backhaul | Dedicated or shared Wi-Fi link | Better than extenders, varies by model | A few ms | Whole-home coverage without cables |
| Mesh with wired backhaul | Ethernet cable | Near full speed | Under 1 ms | Large homes with cable runs, seamless roaming |
If you can run a cable, a router in access point mode is one of the cheapest ways to get strong Wi-Fi in a distant room, and it reuses hardware you may already own.
Before You Start
- An Ethernet cable long enough to reach the spot. Cat5e or Cat6 handles gigabit up to 100 meters (328 feet). Powerline or MoCA adapters also work if running a cable is not practical.
- The admin login for both routers, and the main router’s LAN IP address (commonly 192.168.0.1 or 192.168.1.1).
- The main router’s DHCP range, found in its LAN or DHCP settings, for example 192.168.1.100 to 192.168.1.199.
- Ideally, the second router’s firmware updated to the latest version before you begin.
Method 1: Use the Built-in Access Point Mode
Most current routers from major brands include an AP mode. On TP-Link routers it is usually under Advanced or System settings as Operation Mode, then Access Point. On ASUS routers it is under Administration, Operation Mode, Access Point (AP) mode. Netgear routers typically place it under Advanced, Advanced Setup, Router / AP Mode.
- Connect a computer to the second router and log in to its admin page.
- Find the operation mode setting and choose Access Point. Leave the IP setting on automatic (dynamic) unless you want a fixed address.
- Set the Wi-Fi name and password. Use the same name and password as your main router for easy roaming, or a different name if you want to choose which one to join.
- Save. The router reboots and turns off its DHCP and routing functions.
- Connect an Ethernet cable from a LAN port on the main router to the port the manual specifies on the second router. In AP mode many routers accept either the WAN or a LAN port.
- Look up the second router’s new IP address in the main router’s client list so you can manage it later.
Method 2: Manual Setup on Any Router
Older or ISP-supplied routers may lack an AP mode. You can still convert them by changing three settings.
- Connect to the second router only, not to the main network, and log in.
- Change its LAN IP address to a free address on the main network’s subnet that is outside the DHCP range. Example: main router is 192.168.1.1 with DHCP from .100 to .199, so set the second router to 192.168.1.2. If the second router used a different subnet, such as 192.168.0.1, this change is essential.
- Disable the DHCP server on the second router so only the main router hands out addresses. Two DHCP servers on one network cause random connection failures.
- Configure Wi-Fi: name, password (WPA2 or WPA3), and channels.
- Save and reboot, then log back in at the new address (192.168.1.2 in the example) to confirm.
- Connect the cable LAN to LAN: from a LAN port on the main router to a LAN port on the second router. Leave the second router’s WAN or internet port empty, because using it would place devices behind a second NAT and firewall.
Channel Planning
Two radios close together on the same channel slow each other down. Set channels manually:
| Band | Main router | Access point | Channel width |
|---|---|---|---|
| 2.4 GHz | Channel 1 | Channel 6 or 11 | 20 MHz |
| 5 GHz | Channel 36 to 48 range | Channel 149 to 161 range | 80 MHz |
Use only 1, 6 and 11 on 2.4 GHz because they are the non-overlapping channels in the US. On 5 GHz, putting the two radios in different blocks keeps them apart even at 80 MHz width.
Common Pitfalls and Fixes
- Devices get no internet on the AP: usually DHCP is still on, or the cable is in the WAN port during a manual setup. Check both.
- Cannot reach the AP’s admin page anymore: its IP changed. Find it in the main router’s client list, or reset the second router and start again.
- IP address conflicts: the AP’s fixed IP sits inside the main DHCP range. Move it outside the range.
- Phones cling to the far radio: with the same network name, devices decide when to roam. Lower the transmit power on the AP slightly, or use different names for each.
- Guest network or parental controls stop working on the AP: those features depend on routing functions that AP mode disables on many models. Manage them on the main router instead.
- Slow speed at the AP: confirm the link light shows gigabit; a damaged cable or a 10/100 port caps throughput near 94 Mbps.
When It Makes Sense
Using a spare router as an AP is ideal when the old unit supports at least Wi-Fi 5 with gigabit ports and you can run a cable. If the old router is a single-band Wi-Fi 4 model with 10/100 ports, a new dedicated access point or a mesh node with wired backhaul will give a much better result for the effort.
