MediaTek MT7612u and IBSS mode

MediaTek MT7612u and IBSS mode

[Maurice Smulders]

Platform: Raspberry Pi 4B / CM4 with CentOS 8 stream 64 bit - 5.10.42 kernel

Trying to use this Mediatek USB device and I notice a - quite nasty - problem using IBSS mode. On startup of the IBSS network, there is a chance the Pi goes into a tizzy 	https://github.com/openwrt/mt76/issues/543 - when it's the first (and only) node.
I was able to dupe it consistently in my home - fairly static network - but not anymore in a lab environment. I cannot easily go back home - it's ~3000km from where I am at temporarily.

Does anyone have experience with these MediaTek devices and B.A.T.M.A.N. on lower performance nodes like a Raspberry Pi...

I have ascertained that NONE of the USB Realtek dongles work, as the kernel driver is missing IBSS support at this time...

I'm against an urgent deadline, and trying to understand what I can do to make this work

MfG,

- Maurice

Re: MediaTek MT7612u and IBSS mode

[Sven Eckelmann]

[-- Attachment #1: Type: text/plain, Size: 1518 bytes --]

On Friday, 11 June 2021 03:55:29 CEST Maurice Smulders wrote:
> Platform: Raspberry Pi 4B / CM4 with CentOS 8 stream 64 bit - 5.10.42 kernel
> 
> Trying to use this Mediatek USB device and I notice a - quite nasty - problem using IBSS mode. On startup of the IBSS network, there is a chance the Pi goes into a tizzy 	https://github.com/openwrt/mt76/issues/543 - when it's the first (and only) node.
> I was able to dupe it consistently in my home - fairly static network - but not anymore in a lab environment. I cannot easily go back home - it's ~3000km from where I am at temporarily.
> 
> Does anyone have experience with these MediaTek devices and B.A.T.M.A.N. on lower performance nodes like a Raspberry Pi...

It doesn't seem to me like this is batman-adv or batmand related. So I would 
most likely better to ask on linux-wireless@vger.kernel.org too

And is IBSS mode really required or would meshpoint with mesh_fwding set 0 
also work?

    iw phy0 interface add mesh0 type mp
    ip link set up dev mesh0
    iw dev mesh0 mesh join 11s-bat freq 2412 HT20 mcast-rate 18 beacon-interval 1000

    iw dev mesh0 set mesh_param mesh_fwding 0
    # please make sure that it is actually 0 with: iw dev mesh0 get mesh_param mesh_fwding

    ip link set master bat0 dev mesh0

> I have ascertained that NONE of the USB Realtek dongles work, as the kernel driver is missing IBSS support at this time...
> 
> I'm against an urgent deadline, and trying to understand what I can do to make this work

Kind regards,
	Sven

[-- Attachment #2: This is a digitally signed message part. --]
[-- Type: application/pgp-signature, Size: 833 bytes --]