Add a link to a blog post by RedHat that discusses GRE tunnels in OVS

Change-Id: I6f3f458eadac12bcb907a2ee6b5d795b8e9593e2

diff --git a/doc/source/devref/openvswitch_agent.rst b/doc/source/devref/openvswitch_agent.rst
index 1c441e38198d2d7144edde4e0b866c178e85ba10..0d0338a1b1f62baf968cff8282c357c1c8f228fa 100644 (file)
--- a/doc/source/devref/openvswitch_agent.rst
+++ b/doc/source/devref/openvswitch_agent.rst
@@ -15,6 +15,14 @@ VLAN Tags
 
 .. _OpenVSwitch: http://openvswitch.org
 
+
+GRE Tunnels
+-----------
+
+GRE Tunneling is documented in depth in the `Networking in too much
+detail <http://openstack.redhat.com/Networking_in_too_much_detail>`_
+by RedHat.
+
 Further Reading
 ---------------