Date: Wed, 13 Sep 2017 17:21:02 +0300 From: "Andrey V. Elsukov" <bu7cher@yandex.ru> To: David Horn <dhorn2000@gmail.com> Cc: freebsd-net@freebsd.org Subject: Re: Splitting Mellanox ConnectX-4 interface using breakout cables Message-ID: <a6c9bcd8-aceb-d5d9-1735-367a36892f47@yandex.ru> In-Reply-To: <CAG7Wopk7%2BFJe3e1Uu8hqiJzeJDSpc-9PxMJT77bSt=txgQ-YMw@mail.gmail.com> References: <c5774268-73b4-9874-b1c5-7296c94f0205@yandex.ru> <CAG7Wopk7%2BFJe3e1Uu8hqiJzeJDSpc-9PxMJT77bSt=txgQ-YMw@mail.gmail.com>
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This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --kb92NhR02Cm0jIB93hOr0pRbMhebxoXtL Content-Type: multipart/mixed; boundary="nn8aClrOSdSuji3n1Hvasjbn4wttluAp1"; protected-headers="v1" From: "Andrey V. Elsukov" <bu7cher@yandex.ru> To: David Horn <dhorn2000@gmail.com> Cc: freebsd-net@freebsd.org Message-ID: <a6c9bcd8-aceb-d5d9-1735-367a36892f47@yandex.ru> Subject: Re: Splitting Mellanox ConnectX-4 interface using breakout cables References: <c5774268-73b4-9874-b1c5-7296c94f0205@yandex.ru> <CAG7Wopk7+FJe3e1Uu8hqiJzeJDSpc-9PxMJT77bSt=txgQ-YMw@mail.gmail.com> In-Reply-To: <CAG7Wopk7+FJe3e1Uu8hqiJzeJDSpc-9PxMJT77bSt=txgQ-YMw@mail.gmail.com> --nn8aClrOSdSuji3n1Hvasjbn4wttluAp1 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 13.09.2017 16:43, David Horn wrote: > I was under the impression that these Mellanox 40G->4x10G breakout > cables were for the Mellanox switch side (not Mellanox NIC) to provide > more flexible utilization options for the switch. I have never heard o= f > doing this from the 40G NIC (on any OS). >=20 > Please reply if you have seen this working on *any* OS from the Mellano= x > 40G NIC, as I am curious as well and have a both ConnectX-3 and -4 HW. We have several Intel-XL710-QDA1 cards that work like this: ixl0@pci0:6:0:0: class=3D0x020000 card=3D0x00028086 chip=3D0x15848086 rev= =3D0x01 hdr=3D0x00 ixl1@pci0:6:0:1: class=3D0x020000 card=3D0x00008086 chip=3D0x15848086 rev= =3D0x01 hdr=3D0x00 ixl2@pci0:6:0:2: class=3D0x020000 card=3D0x00008086 chip=3D0x15848086 rev= =3D0x01 hdr=3D0x00 ixl3@pci0:6:0:3: class=3D0x020000 card=3D0x00008086 chip=3D0x15848086 rev= =3D0x01 hdr=3D0x00 This is one card with QSPF28 splited into 4x10G. --=20 WBR, Andrey V. Elsukov --nn8aClrOSdSuji3n1Hvasjbn4wttluAp1-- --kb92NhR02Cm0jIB93hOr0pRbMhebxoXtL Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEzBAEBCAAdFiEE5lkeG0HaFRbwybwAAcXqBBDIoXoFAlm5Ps4ACgkQAcXqBBDI oXrkHAf+Jk2yVidcKt5bGPYKRCZSuVYtPDjO4S3VcwByzFLB3zAYyNjiGlHW97ow gxtBZ+7HqySUMJqRoj7OFBZw6js9Eul8xO3UUNVlIol61PX9vp6SY+Tfx9agGkDE 8m/X8LT/IJym3+QMFemmnHl5P4biby8lJg1ahMR9G2qK5X9IJv/M1AWhFjG2mOzB bvkOVy4zyPIFmknm5k4dG8ci+3QzDpPFcXaxyvfXgSustpM0LrpXcGzqUoQW48h1 r5YRJFoROviSCEL7uXr3p9/ihFuNwyoXhKBHlch8WBOxr+3sW9CCgI2m0dg7WWlm Jm4SZcE+gKWiYhXmF2Al8lvnmC9bqw== =6LKA -----END PGP SIGNATURE----- --kb92NhR02Cm0jIB93hOr0pRbMhebxoXtL--
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