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BE550 v1 - low upload speed via WiFi at channel width 160MHz and 320MHz and MLO issue

BE550 v1 - low upload speed via WiFi at channel width 160MHz and 320MHz and MLO issue

BE550 v1 - low upload speed via WiFi at channel width 160MHz and 320MHz and MLO issue
BE550 v1 - low upload speed via WiFi at channel width 160MHz and 320MHz and MLO issue
2025-10-08 07:57:50 - last edited a week ago
Tags: #Network Connectivity #MLO Network #2.5 Gbps #Wi-Fi 7 #Channel Width
Model: Archer BE550  
Hardware Version: V1
Firmware Version: 1.2.1 Build 20250813 rel.27119(4555)

Hello,

 

I am experiencing issues with upload speed when channel width is above 80MHz - it does not matter if it is 5GHz or 6GHz. ISP speed 2Gbps down / 600Mbps up - over ETH obtainable, but my Galaxy S25 has 200-300 Mbps upload. I can get proper upload speed only when I limit channel width to 80MHz. Download speed are as it should be. I tried enabling/disabling TWT, OFDMA+MU-MIMO but it does not help.

Second issue is with MLO - it links with both 5GHz and 6Ghz but actively uses single band - mostly 6GHz.

 

Thank you in advance

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#1
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1 Accepted Solution
Re:BE550 v1 - low upload speed via WiFi at channel width 160MHz and 320MHz and MLO issue-Solution
2025-10-09 06:05:07 - last edited a week ago

Hello @raszei4c ,

Thanks for contacting our community.

 

If you are experiencing upload speed issues at higher channel widths, it may be related to wireless environment interference, device compatibility, or firmware limitations.

Since download speeds are as expected, the issue may be specific to the way certain devices (like your Galaxy S25) handle uplink transmissions at wider channel widths. 

Besides Galaxy S25, have you tested other clients? 

 

For the MLO connection, please keep in mind that current MLO implementations may prioritize a single band based on signal quality and network conditions, and may not always actively use both bands simultaneously for all traffic types.

When you connect to the MLO Network, would you like to use mainly 5Ghz?

Check Out the Latest Posts: △Pre-release Firmware for Archer AX50 Introduces New Parental Control Features and Enhancements △Pre-release Firmware for Archer AX80 Supports EasyMesh in AP Mode, DoH/DoT, ECO Mode, and More △Introducing AI QoS: Elevate Your Gaming Experience on the Archer GE800 Gaming Router △Connect TP-Link Archer BE550 to Germany's DS-Lite (Dual Stack Lite) Internet via WAN △Tether KidShield Test Recruitment - Safeguarding Children's Online Experience
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Re:BE550 v1 - low upload speed via WiFi at channel width 160MHz and 320MHz and MLO issue-Solution
2025-10-09 06:05:07 - last edited a week ago

Hello @raszei4c ,

Thanks for contacting our community.

 

If you are experiencing upload speed issues at higher channel widths, it may be related to wireless environment interference, device compatibility, or firmware limitations.

Since download speeds are as expected, the issue may be specific to the way certain devices (like your Galaxy S25) handle uplink transmissions at wider channel widths. 

Besides Galaxy S25, have you tested other clients? 

 

For the MLO connection, please keep in mind that current MLO implementations may prioritize a single band based on signal quality and network conditions, and may not always actively use both bands simultaneously for all traffic types.

When you connect to the MLO Network, would you like to use mainly 5Ghz?

Check Out the Latest Posts: △Pre-release Firmware for Archer AX50 Introduces New Parental Control Features and Enhancements △Pre-release Firmware for Archer AX80 Supports EasyMesh in AP Mode, DoH/DoT, ECO Mode, and More △Introducing AI QoS: Elevate Your Gaming Experience on the Archer GE800 Gaming Router △Connect TP-Link Archer BE550 to Germany's DS-Lite (Dual Stack Lite) Internet via WAN △Tether KidShield Test Recruitment - Safeguarding Children's Online Experience
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#2
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Re:BE550 v1 - low upload speed via WiFi at channel width 160MHz and 320MHz and MLO issue
a week ago

  @Joseph-TP 
I did more tests and when I tested client with ax210 network card I had 1.4Gbps download (not issue, that is expected speed) and 600Mbps upload - that was wifi 6e but with 160Mhz bandwidth. Tested s25 with ax mode same slow upload @ 160Mhz. Additionaly I tested with iperf3 - PC with 2.5GbE connected via ETH as iperf3 server and Galaxy s25 @ 6GHz 320MHz as client. Results 2.5Gbps download / 1.7-2Gbps upload - transfers in LAN are ok, there is issue over WAN. So to reproduce issue: s25 with 160MHz or 320MHz channel width, upload -> WAN. WAN - I use PPPoE and VLAN tag, Max cpu load I noticed was 12-13%.

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Re:BE550 v1 - low upload speed via WiFi at channel width 160MHz and 320MHz and MLO issue
a week ago

Hello @raszei4cv2 ,

It looks like you registered with a new email address and a new nickname. Thanks for getting back to us.

As you tested, the client speed with the AX210 adapter met expectations. The S25's speed at 160 MHz was not as expected, which may be due to insufficient wireless compatibility.

You can also try using Wi-Fi Analyzer to test for interfering channels on the S25 and switch to a different, non-interfering channel.

We also suggest contacting phone support for further optimization suggestions.

Check Out the Latest Posts: △Pre-release Firmware for Archer AX50 Introduces New Parental Control Features and Enhancements △Pre-release Firmware for Archer AX80 Supports EasyMesh in AP Mode, DoH/DoT, ECO Mode, and More △Introducing AI QoS: Elevate Your Gaming Experience on the Archer GE800 Gaming Router △Connect TP-Link Archer BE550 to Germany's DS-Lite (Dual Stack Lite) Internet via WAN △Tether KidShield Test Recruitment - Safeguarding Children's Online Experience
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