On Wed, 1 Apr 2015 11:52:37 +0200
Ronald van der Pol <ronald.vander...@rvdp.org> wrote:

> On Thu, Mar 26, 2015 at 23:01:46 -0700, Jeff Kirsher wrote:
> 
> > netdev is not the right mailing list for this question.
> > Adding e1000-devel mailing list...
> 
> Sorry about that. I still have problems with getting the Intel X4DACBL3
> QSFP to 4x SFP breakout cable working with the i40e. I have also upgraded
> the NVM, but it did not help. Below is the modprobe output.

I think the piece you're missing is that you need to run the QCU (QSFP+
Configuration Utility) to switch the port from 40G to 4x10 mode.

At that point the interface will show up as four physical functions
81:0.0 - 81:0.3


> 
> [root@boron src]# ethtool -i ens5f0
> driver: i40e
> version: 1.2.37
> firmware-version: f4.33.31377 a1.2 n4.42 e1932

This is the right NVM to run QCU on top of.

> Apr  1 12:21:27 boron kernel: i40e: Intel(R) Ethernet Connection XL710 
> Network Driver - version 1.2.37

This is a good driver to be running. :-)

> PS I have a 3rd party QSFP-QSFP DAC cable + Intel X4DACBL3 inserted. Might
> the 3rd party DAC cable confuse the driver? I need to travel to get
> physical access to the server, so I cannot easily pull the cable.

I don't know, try QCU first.  The adapter and driver can't
automatically switch to 4x10 mode.

> PPS I understand:
> - 3rd party optics are not supported
> - max of 4 mac addresses, so 4x10 is OK, 4x10 + 1x40 is not OK
> Is this correct?

right, AFAIK

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