netdev - Re: [Qemu-devel] PCI passthrough of 40G ethernet interface (Openstack/KVM)

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Message-ID: <CAP-MU4MTf+kRvvBZYDdsJbDjA1ATe-4zuBCKoCyKpboB9+cD6g@mail.gmail.com>
Date:	Thu, 19 Mar 2015 14:42:17 -0700
From:	Shannon Nelson <shannon.nelson@...el.com>
To:	jacob jacob <opstkusr@...il.com>
Cc:	Stefan Assmann <sassmann@...hat.com>, Bandan Das <bsd@...hat.com>,
	Alex Williamson <alex.williamson@...hat.com>,
	QEMU Developers <qemu-devel@...gnu.org>,
	kvm-devel <kvm@...r.kernel.org>, netdev@...r.kernel.org
Subject: Re: [Qemu-devel] PCI passthrough of 40G ethernet interface (Openstack/KVM)

On Thu, Mar 19, 2015 at 2:04 PM, jacob jacob <opstkusr@...il.com> wrote:
> I have updated to latest firmware and still no luck.

[...]

> [   61.554132] i40e 0000:00:06.0 eth2: the driver failed to link
> because an unqualified module was detected.     <<<<<<<<<<<<<<<<<<<<
> [   61.555331] IPv6: ADDRCONF(NETDEV_UP): eth2: link is not ready
>

So I assume you're getting traffic on the other port and it doesn't
complain about "unqualified module"?  Does the problem move if you
swap the cables?  The usual problem here is a QSFP connector that
isn't compatible with the NIC.  I don't have a pointer handy to the
official list, but you should be able to get that from your NIC
supplier.

sln
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