Why does kernel 6.11.6 name my network interface eth126 instead of usb0?

RandomTroll · 11-01-2024, 09:56 AM

My network adaptor connects via usb. Beginning 2022 August 13 the kernel registered the interface as usb0

Quote:

rndis_host 2-1.3:1.0 usb0: register 'rndis_host' at usb-0000:00:1d.0-1.3, RNDIS device, b6:12:4c:86:3c:36

. I had built kernel 5.19.1 2022 August 11 and booted into it that day. Beginning this morning with the first boot into 6.11.6 the kernel registers the interface as eth126.

Quote:

rndis_host 1-1:1.0 eth0: register 'rndis_host' at usb-0000:00:14.0-1, RNDIS device, 86:12:5e:7d:f5:eb
rndis_host 1-1:1.0 eth126: renamed from eth0

Why? It works, I just had to figure it out. The network hardware is the same.

mrmazda · 11-01-2024, 10:20 AM

https://www.freedesktop.org/wiki/Sof...nterfaceNames/ and https://www.freedesktop.org/software...ng-scheme.html provide the why.

As there noted, if you add [b]net.ifnames=0[/] as a startup parameter on kernel cmdline it may go back. I use it to keep eth0 on the motherboard's ethernet port.

RandomTroll · 11-01-2024, 11:03 PM

Quote:

Originally Posted by mrmazda

... provide the why.

Those are both systemd, which I don't have - does it still apply? The first says it's obsoleted.

kernel-parameters.txt doesn't have net.ifnames . I see netdev, which would seem to address the matter.

mrmazda · 11-01-2024, 11:51 PM

I don't spend much time booted to sysvinit installations any more, don't remember the various net setup configuration options, so can't answer if it still applies.

Code:

> inxi -Sz
System:
  Kernel: 5.14.21-150500.55.80-default arch: x86_64 bits: 64
  Desktop: KDE v: 3.5.10 Distro: openSUSE Leap 15.5
> cat /proc/cmdline
root=LABEL=<redacted> ipv6.disable=1 net.ifnames=0 noresume consoleblank=0 preempt=full mitigations=auto vga=791 video=1440x900@60
> ip a | grep 2:
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
>