How to Set Up a Router as a Wi-Fi Switch: A Complete Guide from A to Z

Have you bought a new router, but your old one is still working and gathering dust on the shelf? Or do you need to expand your network by adding more ports and a wireless access point, but don't want to buy a separate one? switch And Wi-Fi repeater Don't want to? There's a solution: turn your old router into a fully functional one. Wi-Fi enabled network switchThis method saves money, simplifies the network, and allows you to get the most out of your old equipment.

In this article, we will look at how to properly reconfigure a router (using popular models as an example) TP-Link, ASUS, Keenetic And MikroTik) to make it work like managed switch with Wi-Fi hotspot functionality. You'll learn which settings to disable, how to avoid IP address conflicts, and why simply connecting a second router "as is" often leads to internet problems. And also— A unique life hack for models running OpenWRT firmware that allows you to retain some of your router's functionality even in switch mode..

What is the difference between a router and a Wi-Fi switch?

Before flashing your device, it is important to understand the key differences between these operating modes. Router (router) performs three main functions:

• 🔄 Routing — distribution of traffic between different networks (for example, between your home LAN and the Internet).
• 🔒 NAT (Network Address Translation) - allows multiple devices to share a single external IP address.
• 📡 DHCP server — automatically distributes local IP addresses to connected gadgets.

In mode switch The router loses the first two functions, but retains the third (unless manually disabled). Essentially, it becomes an "advanced" network hub that:

• 🔌 Combines multiple devices into one local network via ports LAN.
• 📶 Distributes Wi-Fi (if the wireless module is not disabled).
• 🚫 Does not perform routing — all traffic goes through the main router.

Why is this beneficial? Firstly, you get additional ports. LAN (for example, to connect IP cameras, NAS servers or game console). Secondly, you can organize a second Wi-Fi hotspot with a different network name (SSID) for guests or smart devices. Thirdly, it's cheaper than buying a separate switch and repeater.

When is it worth using a router as a switch?

Converting a router into a switch makes sense in several scenarios:

However, there are cases where this approach inappropriate:

• ⚡ Your primary router is weak - the additional load from the second device can slow down the network.
• 🔧 My old router has a broken port. WAN — without it, it is difficult to organize a correct connection.
• 📡 Do you need mesh network (for example, for a large house) - it is better to buy a specialized solution like TP-Link Deco or ASUS AiMesh.

Preparing the router: what needs to be done before setup?

Before flashing your device, please follow a few mandatory steps:

Reset to factory settings | Update firmware to the latest version | Connect the router to a PC via cable | Write down the current settings of the main router (IP, DNS, subnet mask) | Disconnect all unnecessary devices from the network -->

The most important stage is reset settingsEven if you remember all the passwords, old configurations may conflict with the new mode. On most routers, resetting is done like this:

1. Press and hold the button Reset (usually it is recessed into the body and requires a paper clip).
2. Hold it for 10-15 seconds until the indicators start flashing or go out Power.
3. Release the button and wait for the reboot (1-2 minutes).

After the reset, connect to the router via cable (port LAN on the router → port Ethernet on PC) and check that:

• 🖥️ The computer receives an IP address automatically (for example, 192.168.1.100).
• 🌐 The router's web interface opens at the standard address (192.168.1.1, 192.168.0.1 or tplinkwifi.net).
• 🔑 The default login and password work (usually admin/admin or indicated on the sticker).

⚠️ Attention: If your router was previously used by a provider (for example, Rostelecom or Beeline), it could have been installed locked bootloaderIn this case, resetting won't help - you'll need to reflash the firmware. TFTP or UART.

Step-by-step setup of a router in switch mode

Now let's move on to the main process. The instructions are universal for most models, but we'll point out the specifics for popular brands. The main task is disable DHCP, NAT and reassign the WAN port.

1. Disabling the DHCP server

Go to the router's web interface and look for the section LAN or DHCP. For example:

• IN TP-Link: DHCP → DHCP Settings → exhibit Disable.
• IN ASUS: Local Network → DHCP Server → switch to Off.
• IN Keenetic: Home Network → Home Network Segment → disable Distribution of IP addresses.

Leaving DHCP enabled will result in IP address conflicts on your network as two routers attempt to distribute addresses simultaneously.

2. IP address setting

The switch router must have a static IP address in the same subnet as the main router. For example, if the main router assigns addresses in the range 192.168.1.1–192.168.1.254, assign an address to the switch 192.168.1.2:

• IN TP-Link: Network → LAN → change IP address on 192.168.1.2.
• IN ASUS: Local Network → IP Settings → register a new address.

⚠️ Attention: If the main router uses a different subnet (for example, 192.168.0.x or 10.0.0.x), adjust the switch's address to match it. Otherwise, the devices won't see each other.

3. Reassigning a WAN port to a LAN port

Default port WAN (usually highlighted in blue) is isolated from the local network. To use it as an additional LAN, need to:

• IN TP-Link: go to Network → Switch and turn on the mode Bridge for the port WAN.
• IN ASUS: V Local Area Network → Switch assign a port WAN to the group LAN.
• IN Keenetic: V System → Network Interfaces change port type to Interior.

On some models (eg, MikroTik) this is done through Winbox:

/interface ethernet set wan master-port=lan

4. Setting up Wi-Fi (optional)

If you want the switch to distribute Wi-Fi:

• 📶 Turn on the wireless network in the section Wi-Fi or Wireless.
• 🔐 Set a unique network name (SSID), different from the main router.
• 🔑 Set a password (recommended) WPA2-PSK or WPA3).
• 📡 Select a channel that does not overlap with the main network (for example, if the main router is on channel 6, set it to 1 or 11).

Wiring diagrams for connecting a router-switch to a network

How you physically connect your device depends on your purpose. Let's look at the three most common options.

1. Easy LAN port expansion

If you only need additional wired ports:

• 🔌 Connect the port LAN main router with any port LAN on the switch (including the former WAN, if you reassigned it).
• 🖥️ Connect devices (PCs, printers, TVs) to the remaining ports on the switch.

All gadgets will be on the same subnet and will see each other.

2. Switch + separate Wi-Fi network

If you need to distribute Wi-Fi from a switch:

• 🔌 Connect the main router to the switch via the port LAN→LAN.
• 📶 Set up Wi-Fi on the switch (as described above).
• 📱 Devices connected to the switch's Wi-Fi will be on the same network as wired clients.

3. Guest network isolation

If you want to create a separate network for guests (without access to the main devices):

• 🔌 Connect the main router to the port WAN switch (if it has not been reassigned).
• 🔒 Set up a separate subnet on the switch (for example, 192.168.2.x) and turn it on NAT.
• 🚫 Turn it off DHCP on the main router for this subnet.

This option is more complicated, but provides security.

Common mistakes and how to avoid them

Even experienced users sometimes encounter setup issues. Here are the most common ones and their solutions:

Another typical mistake is using an old cableIf you have a cable that's been lying around for years, it may be damaged. Check it with a tester or simply replace it with a new one. Also, make sure:

• 🔌 The cable is connected to the port LAN the main router, not in WAN.
• 🔄 It's disabled on the switch Firewall (if it is in the settings).
• 📡 If you use Wi-Fi, the channels of the main router and the switch do not overlap.

⚠️ Attention: On some routers (for example, Zyxel Keenetic) After disabling DHCP, access to the web interface may be lost. To restore it, assign the PC a static IP from the switch subnet (for example, 192.168.1.3) and connect directly.

Additional features: VLAN, QoS and OpenWRT

If your router supports advanced features, you can get more out of it:

1. Configuring VLANs for network segmentation

By using VLAN (Virtual LAN) can divide the network into logical segments. For example:

• 🖥️ VLAN 10 — for work PCs.
• 📺 VLAN 20 — for smart TVs and media players.
• 🔒 VLAN 30 — for guest devices.

The setting is available in routers with support 802.1Q (For example, MikroTik, ASUS RT-AX88U). IN TP-Link There is usually no home series VLAN.

2. Traffic prioritization (QoS)

If the switch is to be used for game consoles or IP telephony, set up QoS (Quality of Service) to prioritize important traffic:

For example, in Keenetic:
Internet → QoS → Add rule → Select "Games" or "VoIP"

3. OpenWRT firmware for advanced features

On routers with support OpenWRT (For example, TP-Link Archer C7, ASUS RT-N16) Can:

• 🔧 Retain some of the router's functionality even in switch mode.
• 🔒 Set up VPN server or Pi-hole to block ads.
• 📊 Install SNMP for network monitoring.

FAQ: Frequently asked questions about setup

nvram set wan_port="1"
nvram commit
reboot