Date: Thu, 10 Nov 2022 16:28:50 +0300 From: =?UTF-8?B?w5Z6a2FuIEtJUklL?= <ozkan.kirik@gmail.com> To: Lutz Donnerhacke <lutz@donnerhacke.de> Cc: FreeBSD Net <freebsd-net@freebsd.org> Subject: Re: Bridging LACP PDUs ? Message-ID: <CAAcX-AEPM%2B0FwsBY_ayjbQYJoy-h8vJEqAOsEp9RwQFhDy9zaA@mail.gmail.com> In-Reply-To: <20221110131224.GA308@belenus.iks-jena.de> References: <CAAcX-AEWMfVwQhjD85wFQnFQbpoYfY41n0zk3ajB0JiJt5AXtw@mail.gmail.com> <20221110131224.GA308@belenus.iks-jena.de>
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Hi, I'm trying to filter traffic through an uplink cable between two switches. (similar to virtual wire behaviour). So all broadcast & multicast packages should pass to the other port. But pf or ipfw should work for L3+ packages. Your suggestion will terminate the LACP on FreeBSD. So that if one side's link goes down, the other LACP side cannot sense the problem by this way. Because the connected side can receive LACP PDU's from FreeBSD. I read the source code of if_bridge and then I found the behaviour for reserved multicast addresses : https://github.com/freebsd/freebsd-src/blob/main/sys/net/if_bridge.c#L2369-= L2372 I've defined a new sysctl to turn on/off this condition. It's working now as I expect. Thanks, Lutz Donnerhacke <lutz@donnerhacke.de>, 10 Kas 2022 Per, 16:12 tarihinde =C5=9Funu yazd=C4=B1: > > On Tue, Nov 08, 2022 at 04:44:38PM +0300, =C3=96zkan KIRIK wrote: > > Topology is below: > > [switch1 - lacp] <---> [ freebsd bridge ] <---> [switch2 - lacp] > > > > Is there a way to pass LACP PDUs ? > > LACP packets are more layer1 than layer2, they must not be forwarded at > layer2 to different endpoints. > > Does you setting allow the following? > > [switch1 - lacp] <---> [ freebsd bridge ] <---> [switch2 - lacp] > ^ > | > | > v > [ switch 3 - lacp ] > > If not, why you are using a bridge? > > A typical solution is to have multiple LACPs: > switch1 --lacp-- lagg1 | freebsd bridge | lagg2 --lacp-- switch2 >
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