Re: 73-usb-net-by-mac.rules is no longer used in Bullseye for USB ethernet devices?
Hi.
On Thu, Feb 17, 2022 at 12:32:48AM -0600, Flacusbigotis wrote:
> Thanks Reco & Greg. I did see the
> /lib/systemd/network/73-usb-net-by-mac.link file. Thanks for that.
>
> I don't know exactly what is happening, but the MAC address of the device
> keeps changing after an ifdown/ifup cycle post boot.
You should've said that first.
If the MAC address of the NIC is not persistent, that means udev will
provide you with different interface name each time you boot.
That means that you've hit yet another case of unpredictability of so
called Predictable Network Interface Names.
> I also tried adding a udev file (/etc/udev/rules.d/99_fix_usb.rules) with
> the following content to try to force the addr_assign_type to 0, but this
> did nothing:
>
> SUBSYSTEMS=="usb", SUBSYSTEM=="net", ATTR{addr_assign_type}="0"
Try this:
1) Create a file called /etc/systemd/network/00-usb.link with the following
contents:
[Match]
Driver=ax88179_178a
[Link]
MACAddressPolicy=none
NamePolicy=kernel
You may have to create an appropriate directory, and the file name has
to start with double zeroes.
2) Invoke (really needed):
update-initramfs -k all -u
3) Reboot.
4) Watch your network interface is called usb0 from now then.
Now, this approach has its caveats, so:
1) If you ever plug-in two USB devices that both served with
"ax88179_178a" - you won't be able to distinguish between them. They
will be called usb0, usb1, etc without any meaningful order.
2) If they decide to rename "ax88179_178a" in the kernel - this link
file will cease to work for obvious reasons.
Reco
Reply to: