Date: Tue, 21 Mar 2017 17:10:11 +0100 From: Harry Schmalzbauer <freebsd@omnilan.de> To: Vincent Olivier <vincent@up4.com> Cc: FreeBSD virtualization <freebsd-virtualization@freebsd.org> Subject: Re: tap on lagg ? Message-ID: <58D15063.7010002@omnilan.de> In-Reply-To: <22E0CC61-1822-46CC-A43C-4B7A25844098@up4.com> References: <11A193E5-555F-4733-B192-49A5FEDCFDEA@up4.com> <66637AFA-D092-4EBB-B998-1BB2B2EE2CB4@up4.com> <1207dbb0-ec86-34fd-9a74-68d70b3b7892@osfux.nl> <41619106-86D6-40EF-B84E-DC98A1B54FCD@up4.com> <bcabffa1-0d86-f6cc-5f4e-fc91de149975@osfux.nl> <03551266-4EFD-4BAA-B200-932B62CCA988@up4.com> <58D1469E.30504@omnilan.de> <22E0CC61-1822-46CC-A43C-4B7A25844098@up4.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Bezüglich Vincent Olivier's Nachricht vom 21.03.2017 16:51 (localtime): > Hi, I can confirm that ping works but ssh and (I haven’t tried anything else, but I assume you are right) TCP as a whole doesn’t work. > > From there, I guess that, since I haven’t changed the MTU on the 1G interfaces (only on the 10G ones which are isolated from the 1G network). this leaves offloading. > > Should I disable it (which ones)? On all the physical interfaces or also on the lagg and maybe bridge? You seem to have the following problem: if_bridge(4) tries to disable TXCSUM on all members added. But you add if_lagg(4), which doesn't pass those requests to it's members, but simply ignores the request. So you need to manually -txcsum (-txcsum6), e.g. in rc.conf when you set them "up". Unofrtunately I don't know how offloading is implemented generally, nor how it works for if_igb(4), so I haven't thought about the reason yet, why you need to disable TXCSUM. Much more important, does it also affect TSO? I can't tell, maybe someone with more knowledge can jump in. -harry
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?58D15063.7010002>