From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Hemminger <shemminger@vyatta.com>
Subject: Re: How to use gretap with bridge?
Date: Thu, 29 Oct 2009 15:12:22 -0700
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To: "Neulinger, Nathan" <nneul@mst.edu>
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On Thu, 29 Oct 2009 15:22:19 -0500
"Neulinger, Nathan" <nneul@mst.edu> wrote:

> I was referring to the local IP in the "ip link add ... remote x.z.z.z
> local y.z.z.z" command specifying the endpoints of the tunnel. It lets
> it be added to the bridge if y is even, but not if y is odd. Why should
> it care what the IP of the tunnel endpoints are?
> 
> -- Nathan
> 

It looks like a GRE driver bug. It uses IP address for dev->dev_addr
when it really should be generating a Ethernet address when using
Ethernet wrapper mode.