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 of > doing this from the 40G NIC (on any OS). > > Please reply if you have seen this working on *any* OS from the Mellanox > 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=0x020000 card=0x00028086 chip=0x15848086 rev=0x01 hdr=0x00 ixl1@pci0:6:0:1: class=0x020000 card=0x00008086 chip=0x15848086 rev=0x01 hdr=0x00 ixl2@pci0:6:0:2: class=0x020000 card=0x00008086 chip=0x15848086 rev=0x01 hdr=0x00 ixl3@pci0:6:0:3: class=0x020000 card=0x00008086 chip=0x15848086 rev=0x01 hdr=0x00 This is one card with QSPF28 splited into 4x10G. -- WBR, Andrey V. Elsukov
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