Speed. WAN-Xiaomi router port: what it means and why it matters to your internet

When you buy a Xiaomi router, its characteristics necessarily mention the parameter “speed”. WAN-For many users, it's just a figure in the table -- 100 Mbps, 1 Gbps, or even 2.5 Gbps -- but few understand how it affects the actual operation of the Internet. Meanwhile, it is this parameter that determines whether you can fully exploit the speed your ISP provides, or whether the router becomes a bottleneck on the network.

In this article, we will explain in detail what is WAN-Why is the port more important than the speed of the LAN-You will learn which Xiaomi models support gigabit speeds, how to check the real port bandwidth, and what to do if the router “cuts” the speed. And we will reveal a few hidden nuances that are not written in the official specifications – for example, why even a router with a port 1 Gbps real speed may be lower by 20-30%.

What is it? WAN-Port and why you need it in the router

WAN (Wide Area Network is a port that connects to an external network, which is your ISP. LAN-Ports that distribute the Internet between devices within your local network, WAN-The port is responsible for the incoming traffic, and that's where the entire data stream from the provider to your router goes.

To simplify it,

• 🔌 WAN-Port – gateway to the Internet from the outside (from the provider).
• 🖥️ LAN-ports – “forks” of the Internet for your devices (computers, TVs, set-top boxes).
• 📶 Wi-Fi - wireless analogue LAN, But it also depends on the capacity. WAN.

For example, if your provider provides a tariff of 500 Mbps, but WAN-The router port is limited to 100 Mbit / s, the maximum speed that you can get is these 100 Mbit / s. The remaining 400 Mbit / s will simply be “dressed” at the entrance.

Like speed. WAN-Ports affect the real internet

Many people mistakenly think that the speed of Wi-Fi or LAN-Ports are the main criteria for choosing a router. WAN-The port is the first bottleneck that can limit your internet, even if you have ultra-fast Wi-Fi 6 or gigabit. LAN-port, but WAN-The port is slow, you can’t use the full potential of the network.

Let's take an example:

Pay attention, even if the speed WAN-The port and tariff are the same, the real speed will be slightly lower due to overhead for processing packages (especially when the included speed is not enough). NAT, Firewall or QoS. For example, Xiaomi router AX3600 with a port of 1 Gbps in practice gives about 940-960 Mbps when connected via cable.

⚠️ Note: If your ISP provides speeds of more than 1 Gbps, but the router has WAN-Port only 1 Gbps, you will need a port model 2.5G (For example, Xiaomi Router BE7000 or AX9000). Otherwise, you are simply overpaying for an unused rate.

Which Xiaomi routers support different WAN speeds

Xiaomi produces routers with different types WAN-Here are the main categories:

• 🐢 100 Mbps - obsolete models (for example, Mi Router 3, Mi Router) 3G). Suitable only for budget tariffs up to 100 Mbit / s.
• ⚡ 1 Gbps – Most modern routers (AX3600, AX1800, AX6000). Optimal for tariffs up to 1 Gbps.
• 🚀 2.5 Gbit / s - flagship models (BE7000, AX9000). Required for tariffs over 1 Gbps.

It is important to understand that speed WAN-The port is not only a theoretical maximum, but also a hardware limitation. AX1800 (WAN 1 Gbps) to the tariff of 2 Gbps, the router will not physically be able to miss more than 1 Gbps.

Also, consider that some routers (such as the Xiaomi RA81) have a combined port that can work as a WAN or LAN. In this case, when connecting to the provider through this port, its speed will be limited by the WAN parameters.

How to Check Real Speed WAN-port

To find out how effective it is WAN-It's not enough to just check your router's port speed on your phone or computer:

1. Direct ISP connection. Disconnect the router and connect your computer directly to your ISP cable (if possible), measure your speed through Speedtest or Fast.com, and this will show you the maximum speed that the ISP gives.
2. Connect via router. Now connect the provider's cable to WAN-port of the router and the computer to LAN-Repeat the test. If the speed has dropped, the router is limiting it.
3. Wi-Fi check. Connect to your router wirelessly and measure your speed again. The difference between cable and Wi-Fi will tell you how much the wireless network is cutting.

Example: if you get 900 Mbps when connecting directly to the provider, and only 300 Mbps through the router, then the problem is either in the router settings or in the restriction. WAN-port).

Use Gigabit Cable (Cat5e or higher)| Connect your computer over LAN rather than Wi-Fi | Disable all background downloads | Check QoS and Firewall settings on the router | Repeat the test 2-3 times at different times of the day

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⚠️ Note: If your router has WAN-port 1 Gbps, but when the test shows a speed below 900 Mbps, this may be due to the: 🔌 Low-quality network cable (use) Cat6 higher). ⚙️ Overloading the router processor (especially when turned on) IPv6 or VPN). 📉 Limitations by the provider (e.g. PPPoE adds overhead costs).

Why a router can cut speed even with fast speed WAN-port

Even if your router is equipped WAN-If you have a port of 1 Gbps or 2.5 Gbps, the real speed may be lower:

• 🧠 Weak processor. Cheap routers (e.g. Xiaomi Mi Router) 4A) They have a low-power chipset that can't handle high-speed traffic, and as a result, it can sag up to 300 to 500 Mbps even with a gigabit port.
• 🔄 QoS or Parental Control enabled: These options require additional computing resources, which can reduce speeds by 10 to 30 percent%.
• 🔒 Encryption (IPsec, WireGuard) If you use it VPN On a router, the speed can drop by 20-50% due to the load on the processor.
• 📡 Double. NAT. If your provider is already using NAT, The router does this again, it adds delays.

For example, the Xiaomi router AX3600 standard-setting ~940 Mbps, but when you turn on QoS, the speed can drop to 700-800 Mbps. VPN-server, the real speed will be only 400-500 Mbit / s.

💡

If you want top speed, turn off all unnecessary features in your router settings (Settings → Additional → QoS), especially Bandwidth Control and Parental Control.

It is also worth checking which protocol your provider uses:

• 🔹 DHCP — minimum overhead.
• 🔹 PPPoE - adds ~5-10% of the processor load.
• 🔹 IPoE (DHCP Option 60/61) — optimal option for high speeds.

How to increase speed WAN-Port: Practical Advice

If your router is limiting speed, there are several ways to improve the situation:

1. Update the firmware. Manufacturers often optimize the processor in new software versions. For example, the firmware for the Xiaomi AX6000 version 1.1.5+ improved the processing of traffic at high speeds.
2. Disable unnecessary features.As mentioned earlier, QoS, VPN, and Parental Control can significantly slow down speeds.
3. Use the right cable. For speeds above 1 Gbps, you need a Cat6 or Cat6a cable. Cat5e may not be able to handle the load.
4. Check MTU settings. If the Maximum Transmission Unit (MTU) is set incorrectly, it can lead to packet fragmentation and speed drops. The optimal value for most providers is 1500.
5. Overclock the processor (for advanced ones). Some firmware (for example, OpenWRT) allows you to increase the frequency of the processor, but this can lead to overheating.

If none of these methods worked, your router may not be designed for these speeds, and you should consider buying a more powerful model, such as the Xiaomi BE7000 with a 2.5 Gbps port.

💡

The most effective way to increase the speed of the WAN is to disable all unnecessary functions of the router and use a quality cable. If the router is weak, no settings will help, you need a replacement.

Frequent errors when choosing a router for WAN speed

Many users make the same mistakes when buying a router, which then makes them disappointed in the speed of the Internet.

• 🔍 Ignoring speed WAN. Buy a router with Wi-Fi 6 and gigabit LAN-port, but not looking at WAN-As a result, the router cannot use the entire provider's tariff.
• 💰 Overpaying for unnecessary features: For example, buying Xiaomi AX9000 portable 2.5G, Although their tariff is only 300 Mbit / s.
• 📉 Overheads are ignored. They think a router with a 1Gbps port will give exactly 1Gbps, but in practice they get 900-950Mbps.
• 🔄 ISP incompatibility: Not all routers work well with PPPoE or IPoE. For example, some Xiaomi models are poorly optimized for Russian providers.

To avoid these mistakes, before buying:

1. Check with the provider the real speed of your tariff (not the one specified in the advertisement, but the one that gives out when you connect directly).
2. Check which protocol the provider uses (DHCP, PPPoE, IPoE).
3. Select a router with WAN-port that is 20-30% faster than your tariff (for example, 500 Mbps requires a 1 Gbps port).

⚠️ Note: If you plan to increase the rate in the future, take a router with a margin. For example, for a tariff of 300 Mbps, it is better to take a model with a speed limit. WAN 1 Gbps, not 100 Mbps.

FAQ: Answers to Frequent Questions about Speed WAN-port