Running & logging multiple iPerf services on the WLAN Pi

Yesterday we had some fun at the first UK Wi-Co Community event in London. I wanted to run some throughput tests of OFDM and OFDMA and don’t have enough devices to do it myself at home, so I stepped up in front of a live studio audience for some community participation.

As often happens with live testing in front of an audience I had what the kids call an Epic Fail. The setup and testing worked fine at home with the 1 device I tried with… but what this iPerf newbie did not realise about iPerf3 is that it only allows 1 client connection per port. So 1 person got going and 9 others started shouting back to me that ‘the computer said no’.

Thankfully the amazing Jiri Brejcha was in the audience and, during a break, gave me the commands needed to set multiple iPerf instances running and logging on the WLAN Pi ready for a repeat attempt at lunch. I’m documenting this here before I forget it, for my benefit more than anyone elses. But perhaps you are onsite having made the same assumption I did and this can save your bacon. Be warned, its console commands, you can’t do this in the UI, so you’ll need SSH access to the WLAN Pi.

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How to set channel widths in Aruba Central (Nov 2023)

I’ve started playing with Aruba Central and AOS10 to check out how our Vocera badges function on it and to learn a little more about it so I can assist our customers when they need it. In general our badges have a very good voice experience on Aruba WLAN’s and I’ve been impressed with how smooth the audio is when roaming compared to some other WLAN vendors. But when it comes to Aruba Central I only seem to hear negative opinions about how hard it is to use.

Personally I had a very impressive experience with Aruba Central (with AOS8) when I had to rely heavily on it for an upgrade project during my brief employment at HPE in 2020. But I was only using a very small and particular piece of Central to rinse-and-repeat a multi-store upgrade. Yesterday when trying to configure something pretty fundamental to Wi-Fi, Channel Widths, I think I experienced the frustration others have with the interface, and no amount of Googling could find the answer in HPE Aruba’s documentation or anyone else’s. So here I am writing it up hoping this saves someone else the hour I spent searching, clicking and sighing.

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