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Date:	Thu, 14 Aug 2014 17:56:52 +0200
From:	Yoann Juet <>
To:	John Fastabend <>,
	John Fastabend <>
CC:	"" <>,
	Yoann Juet <>
Subject: Re: ixgbe: SR-IOV, macvlan filter on VFs

> Right this seems to be the case. My guess is libvirt uses the IFLA_VF_MAC
> attribute to set the MAC from the host side. After this is done the PF
> driver will deny any additional MAC requests from the VF which is where
> you get that error message.
> I need to check the libvirt theory but if that is the case I'm not sure
> what the best fix off hand is. Maybe an option to libvirt not to set the
> MAC via the PF. The other option would be to add another knob to allow the
> setting of MAC addrs from the VF via 'ip link' similar to the TX spoofing
> bit already in place. Both would presumably resolve your use case.
> .John

Thanks a lot for your assistance John. Hope that a fix will be found 
regarding this issue.

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