Archer BE550 - Upload speed capped below 100 Mbps on Wi-Fi 6 device (POCO F5 Pro)
Archer BE550 - Upload speed capped below 100 Mbps on Wi-Fi 6 device (POCO F5 Pro)
Hello TP-Link Community / Support team,
I am experiencing a very specific and frustrating upload speed issue with my new Archer BE550 (Wi-Fi 7) router, and I believe it is a firmware compatibility bug.
My Setup:
* ISP: Airtek Solutions (Venezuela) - Fiber Optics (1 Gbps Symmetric plan).
* Router: Archer BE550 (BE9300).
* My Device: POCO F5 Pro (Wi-Fi 6 capable, Snapdragon 8+ Gen 1 chip).
* Comparison Device: Redmi Note 11 (Wi-Fi 5).
The Problem:
When my POCO F5 Pro connects to the 5 GHz band, the download speed is amazing (around 900+ Mbps), but the upload speed is strictly capped and stuck at 93-94 Mbps. It never goes higher, behaving as if there is a 100 Mbps link-rate limit or an aggressive QoS rule applied specifically to my device's upload traffic.
Troubleshooting already done:
1. Cross-device testing: A Redmi Note 11 (Wi-Fi 5 device) on the exact same 5 GHz network easily surpasses 200+ Mbps upload.
2. Band testing: If I connect my POCO F5 Pro to the 2.4 GHz band, the upload restriction disappears, and it unblocks, reaching over 105-161 Mbps upload.
3. Router Settings: I have completely factory-reset the router. Parental Controls are off, QoS is default, and no bandwidth limitations are configured in the Tether App.
4. Wireless modifications: I tried changing the 5 GHz mode from "802.11a/n/ac/ax/be mixed" to "802.11a/n/ac/ax mixed" (disabling Wi-Fi 7 protocols) and reducing the channel width to 20/40/80 MHz. This briefly allowed the upload speed to peak at 123 Mbps, but it eventually drops back down or remains unstable compared to the 900 Mbps download. Turning off OFDMA/MU-MIMO didn't help either.
There seems to be a specific handshake/protocol bug between the Archer BE550's Wi-Fi 7 firmware features and the Wi-Fi 6 (ax) chip on certain Xiaomi/POCO devices when managing upload streams on the 5 GHz band.
I would highly appreciate it if the engineering team could investigate this compatibility issue. I am willing to test a Beta firmware if available to resolve this bug.
Thank you in advance!
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Here is the second test result (Image 2) showing the upload speed cap on the Archer BE550.
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Interesting update: If I put the Archer BE550 as a third router in cascade (behind my Linksys which handles the main connection to the ISP), the upload speed cap disappears and I get 672 Mbps upload, as shown in Image 3 (attached).
This proves the bug specifically triggers during the WAN port negotiation or traffic shaping when the Archer BE550 connects directly to the ISP's fiber ONU.
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@Jdgmz7 ,
Thanks for sharing the test results. To help you efficiently, I've forwarded your case to the TP-Link support engineers, who will reach out to you using your registered email address later. Please keep an eye on your email inbox for follow-up.
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Hello,
I posted this forum thread yesterday. Could you please let me know if you are experiencing the same issue?
https://community.tp-link.com/en/home/forum/topic/865610?moduleId=32
I am almost certain that the issue is related to firmware version 1.3. Apparently, the support engineers have not been able to replicate the issue in their lab, and now they would like to debug my routers through TeamViewer, which I am not comfortable with.
Could you let me know what troubleshooting steps you have taken and whether TP-Link has confirmed that this is a firmware-related issue?
For now, I am staying on firmware version 1.2.6, which is one version behind the latest release, and my upload speeds are normal.
I am going to leave my routers configured this way since they are working properly until TP-Link identifies the root cause and releases a firmware update to address the problem.
Your input on this issue would be greatly appreciated.
Thanks,
Fred
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