[ovs-discuss] Question about Ethernet over GRE

Huy Nguyen huy_nguyen at yahoo.com
Tue Oct 27 21:27:27 UTC 2009

What is ethernet over GRE? Is it a different module than ip_gre? How does one create a gre tunnel using this mechanism?

--- On Tue, 10/27/09, Justin Pettit <jpettit at nicira.com> wrote:

> From: Justin Pettit <jpettit at nicira.com>
> Subject: Re: [ovs-discuss] Question about Ethernet over GRE
> To: "Huy Nguyen" <huy_nguyen at yahoo.com>
> Cc: discuss at openvswitch.org
> Date: Tuesday, October 27, 2009, 1:03 PM
> On Oct 27, 2009, at 12:43 PM, Huy
> Nguyen wrote:
> > At the openvswitch main page, I saw this feature
> mentioned as under development. How can I learn more about
> this feature? Can someone point me to the new code or a
> functional specs if available?
> We are planning to implement this feature in the next
> couple of weeks, so all the details have not fully been
> worked out yet.  The rough plan is that an
> administrator will be able to define a virtual port that
> will define a GRE endpoint and key in the OVS configuration
> file.  That virtual port can then be added to an OVS
> bridge over which Ethernet frames will be sent and
> received.
> > On Linux, packet coming from a gre tunnel interface
> does not have a real MAC header. I'm curious of what is the
> plan to be able to bridge gre tunnel interfaces if that is
> what being developed?
> Support for Ethernet over GRE tunnels was added to Linux
> 2.6.28.  I haven't had a chance to play with them yet,
> but I would expect the frames to be able to just be sent and
> received over the interface that is created when the GRE
> tunnel is created by OVS.
> --Justin


More information about the discuss mailing list