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From: Thomas Monjalon <thomas.monjalon-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
Subject: Re: nic loopback
Date: Tue, 21 Oct 2014 22:14:12 +0200
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To: Alex Markuze <alex-I7wstvAgZDk@public.gmane.org>
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21/10/2014 18:54, Alex Markuze :,
> unfortunately these patches are only valid a pf*. This is also evident from
> the ixgbe pmd code which is the only one looking at this bit (lpbk_mode).
> The ixgbevf functions are agnostic to this capability.

And did you try testpmd with PORT_TOPOLOGY_LOOP (2nd link)?
It could help to understand what's going wrong.

> > ixgbe: add Tx->Rx loopback mode for 82599
> > 
> >         http://dpdk.org/browse/dpdk/commit/?id=db035925617
> > 
> > app/testpmd: add loopback topology
> > 
> >         http://dpdk.org/browse/dpdk/commit/?id=3e2006d6186

Please Alex, do not top post.
-- 
Thomas