Open vSwitch GRE Tunnel Configuration
May 30, 2013 at 10:57:57 AM GMT+2 - permalink - - http://networkstatic.net/open-vswitch-gre-tunnel-configuration/

Using GRE Tunnels with Open vSwitch - blog.scottlowe.org - The weblog of an IT pro specializing in virtualization, storage, and servers
May 30, 2013 at 10:54:08 AM GMT+2 - permalink - - http://blog.scottlowe.org/2013/05/07/using-gre-tunnels-with-open-vswitch/