Hi, I recently tried to install Openstack with one controller/network node and 5 compute nodes. I tried to use GRE for neutron network mode. I finished the installation successfully but the network performance was terribly slow. This was partly due to the fact that I was using a low performance switch. What I inferred was while using the GRE mode the switch's port were constantly blinking indicating heavy traffic. I am aware that in GRE mode there is a mesh of tunnels between the various nodes. I assumed that the GRE mode was placing a burden too heavy on the switch and tore down the setup and created a vlan setup instead. The performance was good with vlan. Is this expected or I had been doing something wrong? http://www.csscorp.com/common/email-disclaimer.php -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack/attachments/20140514/6e68ab92/attachment.html>