Date: Tue, 20 May 2025 11:24:01 +0200 From: A FreeBSD User <freebsd@walstatt-de.de> To: "Patrick M. Hausen" <pmh@hausen.com> Cc: Lexi Winter <ivy@FreeBSD.org>, Kristof Provost <kp@FreeBSD.org>, Marek Zarychta <zarychtam@plan-b.pwste.edu.pl>, Alexander Leidinger <Alexander@Leidinger.net>, 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: <20250520112428.3de8301e@thor.sb211.local> In-Reply-To: <C3DAAC11-7029-4964-BA19-AE7AB2D941DA@hausen.com> 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> <C3DAAC11-7029-4964-BA19-AE7AB2D941DA@hausen.com>
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[-- Attachment #1 --] Am Tage des Herren Mon, 19 May 2025 11:22:31 +0200 "Patrick M. Hausen" <pmh@hausen.com> schrieb: > 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). So the concept is to have if_bridge() facing "towards the network", with IPv4 and/or IPv6. My "concept" - or better "minded topology" - on how to connect computers is probably outdated or mislead, sorry for the noise. On the host in question I was able to switch towards the correct concept without consulting the aformentioned sysctl. bridge0 has a internal IPv4, IPv6 ULA, has a physical NIC (igb0) as member and a bunch of epair() vnet interfaces. I need a IPv6 prefix on bridge0. With the "wrong/faulty" concept I simply used rtsold_flags="-iu igb0" within /etc/rc.conf. Changing this line to rtsold_flags="-iu bridge0" while bridge0 is up and running doesn't work, neither does "rtsol bridge0" show any results. Is there any othe MIB OID for if_bridge() to be aware of to achieve the desired behaviour? Kind regards, Oliver > > 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, > Patrick -- A FreeBSD user [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- iHUEARYKAB0WIQRQheDybVktG5eW/1Kxzvs8OqokrwUCaCxKTAAKCRCxzvs8Oqok r/YIAPwKPc034Q5v5oLbJ18HbO0z4IOADtDvlMr9CfIdoDSEjwEAvjUol9yvpc8q CA6JKLpfHRbzEILoYqTVJg7lT5RjUAQ= =KU3P -----END PGP SIGNATURE-----home | help
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