Date: Mon, 17 Jan 2022 15:09:50 +1000 From: George Michaelson <ggm@algebras.org> To: "Patrick M. Hausen" <hausen@punkt.de> Cc: freebsd-net@freebsd.org Subject: Re: can't bridge an I/F with jumbo to taps, deleted bridge 'flags' are sticky if you remake them Message-ID: <CAKr6gn01GHV6DtQyOZbCca2e1f0T=pZyEM5%2B1775mBZuou6xKQ@mail.gmail.com> In-Reply-To: <FFF54034-A114-4DA7-BA1F-EDDA1DBC614D@punkt.de> References: <CAKr6gn2QZ6AMEnVZyHs%2BbkCBxjcv0Q1sx-4HBsSh%2BQbCF6R9UA@mail.gmail.com> <FFF54034-A114-4DA7-BA1F-EDDA1DBC614D@punkt.de>
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I tested on FreeBSD 13 and the behaviour is the same. But, I want to withdraw an imputation this is a bug. The underlying behaviour is that you can't bond an MTU9000 and an MTU1500 interface. If the base device is set jumbo, then the tapX instances must be set jumbo. once you set MTU to match, it works fine on both FreeBSD12 and on FreeBSD13. It's probably a documentation nit, if anything: bridged devices should have identical MTU. The ifconfig bridge command will refuse to addm <device> if the MTU is not correct for the any other member of the bridge group. cheers -George On Thu, Jan 13, 2022 at 6:15 PM Patrick M. Hausen <hausen@punkt.de> wrote: > > Hi all, > > > Am 13.01.2022 um 06:41 schrieb George Michaelson <ggm@algebras.org>: > > > > I just found a couple of odd quirks in bridge > > > > 1) you can't bridge an MTU 9000 interface to taps. If you dial it back > > to 1500 it works fine. I might have missed this being a limit in the > > man > > > > 2) when you delete a bridge, and re-create it, some of the addm > > "history" can come live. faulty debug suggests some state in the > > kernel/network space isn't wiped clean. Maybe this is a good thing, > > the most likely outcome is you wanted much the same but.... POLA > > > > FreeBSD 12-2-RELEASE-p6 (if this is fixed in newer FreeBSD) > > Are you in a position to test FreeBSD 13? The bridge code has been > more or less completely rewritten. > > Kind regards, > Patrick > -- > punkt.de GmbH > Patrick M. Hausen > .infrastructure > > Kaiserallee 13a > 76133 Karlsruhe > > Tel. +49 721 9109500 > > https://infrastructure.punkt.de > info@punkt.de > > AG Mannheim 108285 > Gesch=C3=A4ftsf=C3=BChrer: J=C3=BCrgen Egeling, Daniel Lienert, Fabian St= ein >
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