Re: CURRENT: can not add device to bridge: ifconfig: BRDGADD igb0: Invalid argument

W dniu 18.05.2025 o 18:06, A FreeBSD User pisze:
> Hello,
>
> running recent CURRENT (FreeBSD 15.0-CURRENT #68 main-n277334-d9900b9ea2b2: Sun May 18
> 16:51:02 CEST 2025), I ran into the following problem:
> Can not add interfaces anymore to a bridge device.
> Neither existing physical devices, nor epair devices created during setup of jails - with the
> result of no jails availabel and/or no bridge working.
>
> A more amusing part of this story is: I ran almost two identical boxes, based upon elderly
> IvyBridge CPUs, both on outdated ASrock Z77 Pro mainboards. One machine, the
> now-failing-one, has moved to AMD Ryzen 9700X based box based on ASrock B850 mainboard - just
> for the record, if this is of importance or interest.
>
> On both systems I use custom kernels, mostly disabling unused devices. Having an ABI issue in
> mind, I recompiled the whole world/kernel on the system with AMD CPU, but the issue is the
> still persistent.
>
> A real hardware problem or just a coincidence with faulty code?
>
> Thanks for helping,
>
> O. Hartmann
>
>
Hello Oliver,

please follow this commit:

https://github.com/freebsd/freebsd-src/commit/b61850c4e6f6b0f21b36da7238db969d9090309e

and this thread:

https://lists.freebsd.org/archives/freebsd-current/2025-May/007602.html

TL;DR: set net.link.bridge.member_ifaddrs=1 (the earlier, the better, 
loader.conf prefered) and before FreeBSD 16.0-RELEASE (still plenty of 
time), either remove addresses the bridge members, or consider migration 
to different bridge (Netmap ?!) or consider migration to different OS.

Cheers

Marek