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Maximum throughput R650 / R550

beni_mahler

For a customer with a 10G fiber internet connection, we are trying to maximise the throughput on his R650. We are getting up to 1.4 Gbit/s when directly connecting to the router of the provider and around 2 Gbit/s if we connect a PC to the 2.5G Ethernet port where the AP hangs.

When connecting the R650 the upload is fine (arount 1.3 Gbit/s) but the upload is below 400Mbit/s. What we have tried to improve so far (without success):

- set channel width to 160MHz
- disabled background scanning
- Switched 2.4G off
- set the wifi to ofdm-only

- set the bss minrate to 12

- manual channel selection (tried various channels that are completely free from other Radios)

Any idea is appreciated.

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James

Hello,

"When connecting the R650 the upload is fine (arount 1.3 Gbit/s) but the upload is below 400Mbit/s."

Could you confirm if the download is 1.3 Gbps and upload is 400 Mbps respectively?

Also, is this AP managed by a ZoneDirector, Smartzone, Unleashed, or Ruckus Cloud?

beni_mahler

We are using a symmetric 10/10 Gbit/s internet connection. The UPload is fine and the DOWNload not so much. I know usually it's the other way round. We are using unleashed.

James

Try a packet capture from the 5 GHz radio of the AP, when doing a speed test. Please make sure to stop the capture pretty soon as the file size can go large in a short period of time, when running an internet speed test.

Login to Unleashed AP > Admin & Services > Administration > Diagnostics > Packet capture > choose 5 GHz radio button > check your AP > click "Add to capture APs" > Use local mode and filter with user device mac address > Start the capture > run speed test on device > stop with after 3 seconds of "download speed" testing.

Open this file using Wireshark. Check these captures for data packets sent from AP to your user device. Click on one such packet > Expand "802.11 radio information" > check for data rate negotiated between AP and user device.

Should look something like this:

Squozen

What speeds do you get when running iperf to a device on network?

sanjay_kumar

@beni_mahler

Could you please confirm how are you doing the speed test?
Are you using Okla speed test or any other tests?

We first need to understand the speed between the AP and client based on the wifi conditions.
Could you please confirm the result of the below test:
1. Connect a AX client (wifi6 capable client) to the SSID.
2. Once connected, check the speed negotiation of the client under the client network adapter settings. Below is the sample network adapter details where the speed is showing 1. Connected to 802.11n, with 150Mbps uplink and 150 Mbps downlink.

3. Please ensure the client is connected to atleast 802.11ac and then do the test to see the result.

beni_mahler

Good question. We will try.

However, I have not used iperf a lot recently. A thing I remember is that the default settings (TCP window size) did not give me accurate results. Do you have any information what the iperf settings should be when trying to measure speeds above gigabit? Are there any settings that should be adjusted when using iperf over WiFi?

Squozen

You can use UDP for iperf, but I've done multigig iperf tests through firewalls without having to fiddle around on Linux/Mac systems (not sure about Windows as I don't use it anymore). You can always just add -P8 to start 8 threads which will reduce the impact of a poorly behaved network stack.