From mboxrd@z Thu Jan  1 00:00:00 1970
From: Hannes Frederic Sowa <hannes@redhat.com>
Subject: Re: [PATCH net-next 1/1] ipvlan: Initial check-in of the IPVLAN
 driver.
Date: Wed, 12 Nov 2014 00:22:40 +0100
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Cc: Mahesh Bandewar <maheshb@google.com>,
	netdev <netdev@vger.kernel.org>,
	Eric Dumazet <edumazet@google.com>,
	Maciej Zenczykowski <maze@google.com>,
	Laurent Chavey <chavey@google.com>,
	Tim Hockin <thockin@google.com>,
	David Miller <davem@davemloft.net>,
	Brandon Philips <brandon.philips@coreos.com>,
	Pavel Emelianov <xemul@parallels.com>
To: Cong Wang <cwang@twopensource.com>
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On Di, 2014-11-11 at 15:12 -0800, Cong Wang wrote:
> On Tue, Nov 11, 2014 at 2:29 PM, Mahesh Bandewar <maheshb@google.com> wrote:
> > This driver is very similar to the macvlan driver except that it
> > uses L3 on the frame to determine the logical interface while
> > functioning as packet dispatcher. It inherits L2 of the master
> > device hence the packets on wire will have the same L2 for all
> > the packets originating from all virtual devices off of the same
> > master device.
> 
> Why do we need this from the beginning?
> IOW, what problem does this solve while macvlan doesn't?

I think it is good to reduce the number of mac addresses before a NIC
switches into promisc mode.

Bye,
Hannes