Speed and latency with Archer AX18 AX1500

Speed and latency with Archer AX18 AX1500

Speed and latency with Archer AX18 AX1500
Speed and latency with Archer AX18 AX1500
a week ago
Model: Archer AX18  
Hardware Version: V1
Firmware Version: 1.2.1

Hello TP-Link Support Team,

I’m having ongoing speed and latency problems with my Archer AX18 AX1500 router that I bought to improve the home network with the ISP Odido Fiber (1 Gbps) in the Netherlands. However, the result is opposite, despite the initial router by the ISP being of lower quality.

 

If you want to read the thread with the Odido tech support, please search online for "Router instellen met TP-link Archer AX1500 voor glasvezel".

 

My Setup:

  • ISP: Odido (Fiber 1 Gbps)

  • Connection Type: Dynamic IP (confirmed by Odido support)

  • VLAN ID (Internet): 300

  • Router: TP-Link Archer AX1500 (latest firmware, auto-updated)

 

What Works:

  • Initial router Zyxel EX5601: proves the connection works up to full speed.

  • TP Link router: connected but shows worse speeds, stability and latency.

 

The Issue:

  • Speed and latency are much worse than with the ISP’s router (Zyxel EX5601).

  • With TP-Link:

    • Wired PC speed: ~900 Mbps, acceptable.

    • Wi-Fi PC and smartphone (5 GHz): around 300-500 Mbps when facing the router (not great), and just 100–150 Mbps when only 6 meters and one light wall from the router. Also, high upload/download latency around 200 ms.

 

  • I have already:

    • Disabled QoS, OFDMA, and all non-essential features.

    • Channel width 20/40/80 MHz

    • Tested all channels 36, 40, 44, 48

    • Verified WAN/LAN ports negotiate at 1 Gbps full duplex.

    • Rebooted modem and router multiple times.

 

Thank you for your assistance,

Maurizio

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#1
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4 Reply
Re:Speed and latency with Archer AX18 AX1500
Yesterday

Hello @Maurizio11235 ,

Welcome to our community.


Here are some steps you can follow to troubleshoot and potentially improve your Wi-Fi speed and stability:

1. Accurate Speed Testing: Use https://www.speedtest.net or the Speedtest app/CLI to measure your Internet speed.
2. Tips to Improve Router Speed:
• Log in to the router's web interface (http://tplinkwifi.net), go to Advanced > QoS, and make sure QoS is disabled.
• In the Tether app, check Parental Control and ensure no parental control profiles are configured.
• Go to Advanced > NAT Forwarding > UPNP to disable UPNP, and Advanced > Security to disable SIP ALG. These features can sometimes affect Wi-Fi performance and speed test results.
• When using Speedtest by Ookla, try selecting different servers, as some may provide better speeds than others.

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#2
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Re:Speed and latency with Archer AX18 AX1500
20 hours ago

  @Joseph-TP 

 

Thanks for the update Joseph.

  1. For speed testing, I was indeed using that site and the app on my PC and phone.
  2. About your tips, I already had QoS, Parental Control, and UPNP disabled, while I deactivated SIP ALG just now. No visible change yet.
  3. I just discovered that my PC was connected to the 2.4 GHz line, because of the Smart Connect setting, which didn't let me set up 2 separate SSIDs this time. I am now connected to the 5 GHz one, but still no change. About 250 Mbps from this other room, 6 meters from the router.

 

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#3
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Re:Speed and latency with Archer AX18 AX1500
19 hours ago

  @Maurizio11235 

 

Hi,

 

According to specs found on the Internet the hardware of the Zyxel EX5601 is quite impressive. (AX6000-class Wi-Fi, 2x 2.5 Gb Ethernet ports, 2000 MHz quad-core CPU, 1024 MB RAM)
https://openwrt.org/toh/hwdata/zyxel/zyxel_ex5601-t0

 

So, when looking from the hardware side of things the Archer AX18 is actually a huge downgrade from the Zyxel EX5601.

 

By the way, when you compare the 5 GHz Wi-Fi performance of the two routers, then make sure the Zyxel EX5601 is also using channels 36, 40, 44, 48.
 

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#4
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Re:Speed and latency with Archer AX18 AX1500
19 hours ago

  @woozle 

 

Thanks a lot, I honestly hadn't realized it, as I heard this Zyxel was underwhelming for many users and they resorted for a better router for a small apartment. It looks like they perform similarly in terms of wifi power and stability.

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#5
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