Raspberry Pi 3 causing multicast storm- I think?

[Muttley]

Hi all,

So I recently I setup a new Raspberry Pi 3 with LibreElec (V 8.0.2), running Kodi for a friend.

When I went to my friend's home to set it up, I noticed that on WiFi, any streaming was terrible and that the UniFi Access Point that it was connecting to was showing huge amounts of TX interference.



I tried to bring the device back home and connected it to my Access Point (also a UniFi) and it's doing the same thing. With an Ethernet cable, it worked like a dream.

A techie friend suggested that the PI is causing a multicast storm... and suggested that I "Block LAN to WLAN Multicast and Broadcast Data" except for the router.
I tried this in the UniFi controller, rebooted everything and it made no difference.

I also tried to disable zeroconf within Kodi but the problem still seems to persist.

He suggested that I should format the device and start from scratch.

Does anyone have any suggestions?

 

[infscrtyrisk]

All that I can see is excessive utilisation. Ethernet has a whole lot more capacity and is probably absorbing it a whole lot better than the wireless carrier. You need to determine what is causing it, and therefore need to take a sniffer trace to determine what kind of traffic it is, and then determine what service/s on the RPI is causing it. Without it, it's just guesswork. You can use tshark or tcpdump on the Pi to generate it, or even better, use a dedicated PC with wireshark (with the NIC in promiscuous mode). If I were you I'd do it using the ethernet connection.

Alternatively, format the device and start from scratch. Good luck!

 

[Muttley]

Thanks so much... will have a look!

 

[irBosOtter]

Do a RF scan with the AP, then choose the channel with the least amount of interference, that high utilization does not mean traffic over the wifi link, just interference on the same channel by another device close by

 

[Muttley]

Do a RF scan with the AP, then choose the channel with the least amount of interference, that high utilization does not mean traffic over the wifi link, just interference on the same channel by another device close by

I already did that and changed channels, thanks.

The minute you start interacting with the Pi - the TX goes mad..I think I need to work out what on the Pi is causing this.