Flint 2 Wi-Fi download speed issue

Technical Support for Routers
1

Hi guys!

My Flint 2 is on Beta 4.7.4 and I have tried OpenWRT snapshots, and Pesa's custom builds before, and they had the same issue. The problem is that no matter on what client I am, I can't get more than 500-650 Mbps download speed. Upload speed doesn't have the same issue, it's around 870 ish Mbps.

My setup:

  • ONT with 1GbE link to the Flint 2, Public IP via DHCP, Gigabit symmetrical plan
  • Hardware offload enabled
  • WAN to Flint 2 speed is gigabit, confirmed by Speedtest
  • WAN to LAN speed is gigabit, confirmed by Speedtest
  • LAN to LAN speed is gigabit, confirmed by iperf
  • LAN to Wifi speed is gigabit, confirmed by iperf
  • Router to Wifi speed is around 1.6 Gbps, confirmed by iperf and librespeed
  • Wifi link is AX, 160 MhZ bandwidth
  • WAN to Wifi speed is Down: around 500-650 Mbps, Up: around 800 Mbps

My question is what could cause the slower and uneven download speed from the WAN to Wifi side?

2

The testing process is very complete, Nice.

But it's a little weird, since WAN-LAN and LAN-WLAN are both gigabits, LAN-WLAN is on a bridge and doesn't create a bottleneck, so WAN-WLAN should also be gigabits.

  1. What is the Wi-Fi negotiation rate of the client device?
  2. List the client devices you use (as many as possible) and see if we can reproduce this.
  3. Try changing the WI-FI bandwidth to 80 MHz?
  4. When testing WI-FI, please connect to only one WI-FI client.
  5. Try the 4.7.0-op24 firmware (although similar to the OpenWRT Snapshot, but also try once again)
4

First, thank you for the response!

  • The negotiation rates are 2400 Mbps (sometimes 2133).
  • Clients were iPhone 15 Pro, Intel AX210.
  • Tried to switch to 80 MHz but the results were even slower.
  • What I will do is to switch to the op24 firmware, and test with only one client.

There are two things I am not sure about, first is if I disable Network Acceleration will it disable WED, so I can exclude WED as the source of the problem, the second is if it's a problem if there are two wired APs, operating on the 5 GHz spectrum with 80 mhz bandwidth, on the non DFS channels. The Flint 2 is operating on DFS channels.

Thank you!

5

Hello,

I would like to ask what the mean of WED is?

If the network speed test is from WAN to LAN, hardware acceleration cannot be turned off, as hardware acceleration is the function of optimizing NAT conversion efficiency and improving network speed.

The channels are different, and there seems to be no problem.
But you can try to manual setup the Flint 2 on a non-DFS channel, e.g. 36-48.

6

It all comes down to the half duplex nature of the wifi after all.

1 Like