Fast upload but abysmal download

[aeridith]

Hi there,

Getting extremely good speeds uploading (1200Mbps) via speedflex but bad speeds when uploading(350Mbps). Any idea what the culprit could be?

Source device: iPhone 13 802.11ax WIFI-6

Destination: Ruckus 750 with 802.3at 

Cheers,

Aeridith

[aeridith]

[Squozen]

I have similar results on an iPhone 12 with an R650.

[DarrelRhodes]

Hi Aeridith,

I don't believe SpeedFlex is giving you accurate data, as the iPhone 13 doesn't have the hardware capability to push 1.2Gbps via Wi-Fi.

I have an iPhone 13 Pro Max and on my 900Mbps FTTP circuit, with 80MHz channels on a Ruckus R750 with a 2.5Gbps Ethernet connection, the max throughput I've seen (using Ookla Speedtest.net) is 616Mbps.

The MCS11 rate for a 2-stream 802.11ax device (such as the iPhone) @80Mhz channel width, with short guard-interval is 1,201Mbps.  This would usually result in a TCP throughput of 40-60% - at most, approx 720Mbps.

I would recommend using an internet-based speed-test or local iPerf server to determine true TCP throughput. As detailed here: https://support.ruckuswireless.com/articles/000003772

I hope that helps,
Darrel.

[Squozen]

I've seen 846Mbps from my iPhone 12 on Speedtest. The internet is very good here though.