Date: Tue, 05 Dec 2023 20:02:11 +0000 From: Benoit Chesneau <benoitc@enki-multimedia.eu> To: Kristof Provost <kp@FreeBSD.org> Cc: freebsd-net@freebsd.org Subject: Re: vxlan with IPv6 underlay ? Message-ID: <MtPP9z0-kP65O109ZU7zmjeTXThi9XL2k36RlRMxXks-yniimXQ4loev6RIGMgCgh4TFgYlYiAVN3ANZ9UXkDmqxljm3CvJPfVNHQCiiuKc=@enki-multimedia.eu> In-Reply-To: <3E2D29F7-2B64-45DD-A13B-7BEB799AF9BA@FreeBSD.org> References: <bmkPdpqYkXzCqs5CYfBIZO6sXwmR1hU38pCr5cRlBeTxM4VIbzTj_A0YU6yFP2CbVxXHoOLeqHpdBY1reGJS_VvNBesk3J1HBWblpjijl2o=@enki-multimedia.eu> <793EA8DF-BD26-414A-A12D-866356D339DB@FreeBSD.org> <Q4lNxBr17sBg-pHCFTyIugCDvSpd0oXXH6UBv5yEkJtq2lJKIXG_K4MSDarhwkFt7PAFvaLTLdm-rj6MR-ix7B8BfG-7aINXUg5h2a5VkPg=@enki-multimedia.eu> <3E2D29F7-2B64-45DD-A13B-7BEB799AF9BA@FreeBSD.org>
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OK Thanks for the answer. I will create a ticket. Found that the option `vx= lanhwcsum` is the culprit. Beno=C3=AEt On Tuesday, December 5th, 2023 at 15:24, Kristof Provost <kp@FreeBSD.org> w= rote: > On 5 Dec 2023, at 15:21, Benoit Chesneau wrote: >=20 > > Changing the mtu wasn't enough. To make it works i had to disable vxlan= offload features: > >=20 > > `ifconfig mce0 -vxlanhwcsum -vxlanhwtso` > >=20 > > Then suddenly all started to work. The card is the following: > >=20 > > `mlx5_core1@pci0:17:0:1: class=3D0x020000 rev=3D0x00 hdr=3D0x00 vendor= =3D0x15b3 device=3D0x1015 subvendor=3D0x1590 subdevice=3D0x00d4 vendor =3D = 'Mellanox Technologies' device =3D 'MT27710 Family [ConnectX-4 Lx]' class = =3D network subclass =3D ethernet PCI-e errors =3D Correctable Error Detect= ed Unsupported Request Detected Corrected =3D Advisory Non-Fatal Error` > >=20 > > Which is odd. Wonder why it's needed. Thoughts? >=20 > Driver bug? >=20 > I=E2=80=99m not familiar with the mlx5 driver (or hardware), but that= =E2=80=99d be my guess. > The first step in debugging that would be to figure out which one of thos= e offload features is responsible, and probably also capturing traffic (out= side of this machine) to see if anything is sent and if so how it=E2=80= =99s broken. >=20 > Best regards, > Kristof
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