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Subject: Re: [virtio-dev] [PATCH v4] content: Introduce VIRTIO_NET_F_STANDBY feature

On Mon, Nov 26, 2018 at 12:22:56PM -0800, Samudrala, Sridhar wrote:
> > Update:
> > I have just set the vf mac's address to 0 (ip link set ens2f0 vf 1 mac
> > 00:00:00:00:00:00) after unplugging it (the primary device) and the
> > pings started working again on the failover interface. So it seems
> > like the frames were arriving to the vf on the host.
> > 
> > 
> Yes. When the VF is unplugged, you need to reset the VFs MAC so that the packets
> with VMs MAC start flowing via VF, bridge and the virtio interface.
> Have you looked at this documentation that shows a sample script to initiate live
> migration?
> https://www.kernel.org/doc/html/latest/networking/net_failover.html
> -Sridhar

Interesting I didn't notice it does this. So in fact
just defining VF mac will immediately divert packets
to the VF? Given guest driver did not initialize VF
yet won't a bunch of packets be dropped?


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