Date: Mon, 19 May 2025 11:22:31 +0200 From: "Patrick M. Hausen" <pmh@hausen.com> To: Lexi Winter <ivy@FreeBSD.org> Cc: Kristof Provost <kp@FreeBSD.org>, Marek Zarychta <zarychtam@plan-b.pwste.edu.pl>, Alexander Leidinger <Alexander@Leidinger.net>, A FreeBSD User <freebsd@walstatt-de.de>, rgrimes@freebsd.org, FreeBSD CURRENT <freebsd-current@freebsd.org> Subject: Re: CURRENT: can not add device to bridge: ifconfig: BRDGADD igb0: Invalid argument Message-ID: <C3DAAC11-7029-4964-BA19-AE7AB2D941DA@hausen.com> In-Reply-To: <aCrxeWv2FmAdEMkB@ragweed.eden.le-fay.org> References: <20250518180658.2e58d55a@thor.sb211.local> <192c8e37-4a85-4916-9986-0a556333a527@plan-b.pwste.edu.pl> <20250518182404.3a760da9@thor.sb211.local> <1ca30cdfb783848eafce24b77f10c0a5@Leidinger.net> <310d460a-d372-47c8-8275-2908bb8417ad@plan-b.pwste.edu.pl> <7A4E0DDE-77F7-4CDC-8C52-BE938298E105@FreeBSD.org> <aCrxeWv2FmAdEMkB@ragweed.eden.le-fay.org>
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Hi all, > Am 19.05.2025 um 10:53 schrieb Lexi Winter <ivy@FreeBSD.org>: > > the basic problem here is that putting IP addresses on a bridge member > is a layering violation and it's just not reasonable (or even possible) > to support this in a sensible way in bridge. this is why most dedicated > network devices (switches, routers, etc.) don't let you do this. Adding to this, the fact that IP addresses on member interfaces are not supported has been documented from day one of the introduction of if_bridge(4). A couple of months ago I did check the commit times of the code and the relevant handbook section because exactly this discussion came up again in a different context. https://docs.freebsd.org/en/books/handbook/advanced-networking/#network-bridging > If the bridge host needs an IP address, set it on the bridge interface, not on the member interfaces Kind regards, Patrickhome | help
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