Configuring Network Namespaces VLANs and GRE Tunnels with OpenvSwitch

http://blog.scottlowe.org/2013/09/09/namespaces-vlans-open-vswitch-and-gre-tunnels/

Configuring VXLAN and GRE Tunnels on OpenvSwitch

http://networkstatic.net/configuring-vxlan-and-gre-tunnels-on-openvswitch/

GRE Tunnels with OpenvSwitch

http://blog.scottlowe.org/2013/05/07/using-gre-tunnels-with-open-vswitch/

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux_OpenStack_Platform/4/html/Installation_and_Configuration_Guide/Configuring_Open_vSwitch_tunnels.html

http://vlabs.cfapps.io/openvswitch/vlans_gre.html

http://networkstatic.net/configuring-vxlan-and-gre-tunnels-on-openvswitch/

http://networkstatic.net/open-vswitch-gre-tunnel-configuration/

Example GRE and VXLAN tunnel configuration

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux_OpenStack_Platform/5/html-single/Installation_and_Configuration_Guide/#Configuring_Open_vSwitch_tunnels

GRE Tunnels in OpenStack Neutron

Gre Tunnels
http://assafmuller.com/2013/10/10/gre-tunnels/

Gre Tunnels In OpenStack Neutron
http://assafmuller.com/2013/10/14/gre-tunnels-in-openstack-neutron/