we are using openstack kilo in our openstack cloud environment. When we try to download something we have observed that the network speed with external network is slow. We are getting network speed in kbps where as our network speed is in MBPS.

Before setting "ethtool --offload eth0 gro off" and "ethtool -K eth0 tso off" on VM eth0 interface and also on external network interface the speed was around 50 kbps. After setting the above values speed increased to 250 kbps but still it is far less than our network speed. We are using tGRE tenant network and The MTU size on vm interface is 1454. Can somebody help me on this issue.