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Severe Bufferbloat on Wireless Upload – Archer C64

Severe Bufferbloat on Wireless Upload – Archer C64

Severe Bufferbloat on Wireless Upload – Archer C64
Severe Bufferbloat on Wireless Upload – Archer C64
a week ago - last edited a week ago
Tags: #Network Connectivity
Model: Archer C64  
Hardware Version: V1
Firmware Version: 1.13.15 Build 240812 Rel.53634n(5553)

Hi everyone,
 

I’ve been running bufferbloat tests on my TP-Link Archer C64 and consistently getting poor results on the wireless connection—especially during upload active time. The LAN connection performs well, but Wi-Fi shows significant latency spikes.
 

Here’s what I’ve tried so far:

  • Changed channel width (20/40 MHz)

  • Enabled/disabled QoS

  • Enabled/disabled NAT Boost

  • Tested with only one device connected (same device for both LAN and Wi-Fi)

  • Device placed within 1–2 feet of the router during testing

Despite all this, the wireless bufferbloat remains severe. I suspect this could be a firmware-level issue, possibly lacking proper queue management on the wireless interface.


Test results: 

Lan test result: 

Wireless test result: 

Would appreciate any insights or confirmation from others using the Archer C64. TP-Link team—could this be addressed in a future firmware update?

Thanks,
Dipto

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#1
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6 Reply
Re:Severe Bufferbloat on Wireless Upload – Archer C64
a week ago

Isn't anyone available from TP-Link? @TP-Link 

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#2
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Re:Severe Bufferbloat on Wireless Upload – Archer C64
a week ago

Hello@Dipto-K ,

Welcome to our community.

 

Please try to change channel for the wireless bands:Changing Channel and Channel Width on a TP-Link Router (new logo).

For 2.4GHz wireless client devices, adjust the 2.4GHz channel width to 20MHz; for 5 GHz wireless client devices, adjust the 5GHz channel width to 80MHz or 40MHz, etc.

In addition, please test every band separately, and enable the guest network for comparison.

 

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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#3
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Re:Severe Bufferbloat on Wireless Upload – Archer C64
Monday

  @Joseph-TP I have tested applying different combinations settings, using different devices. But upload active time in wireless connection always show high buffer bloat.

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#4
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Re:Severe Bufferbloat on Wireless Upload – Archer C64
Wednesday

  @Joseph-TP 

After some more digging, I’ve found that Cloudflare’s DoH (DNS over HTTPS) seems to be contributing to the bufferbloat issue I mentioned earlier. I was using 1.1.1.1 and 1.0.0.1 as my DNS servers, along with Cloudflare’s DoH enabled. But once I disabled DoH and reverted to standard DNS, the bufferbloat dropped significantly—especially during wireless uploads.

It looks like the Archer C64 struggles with handling HTTPS traffic efficiently under load, and the extra overhead from DoH makes things worse. Since this router doesn’t support Smart Queue Management (SQM), even small increases in encrypted traffic can clog the buffers.

Just wanted to share this in case others are seeing similar latency spikes. Disabling DoH might help if you're running into the same issue. 

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#5
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Re:Severe Bufferbloat on Wireless Upload – Archer C64
Wednesday

  @Joseph-TP Since DoH seems to be contributing to the bufferbloat issue on the Archer C64, I’d really appreciate it if TP-Link could consider adding support for DNS-over-TLS (DoT) in future updates. It’s generally more lightweight and might help reduce latency while still keeping DNS traffic secure.

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#6
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Re:Severe Bufferbloat on Wireless Upload – Archer C64
7 hours ago

  @Dipto-K ,

Thanks for your feedback.

I noticed you've created a vote to add DoT functionality to this model. Please stay tuned for future firmware updates for this model.yes

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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#7
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