Virtual Networking Performance in OpenStack Platform for Network Function Virtualization

<div>Network elements in an OpenStack network node connected to three virtual subnets. Three OVS bridges (red boxes) are interconnected by patch port pairs (orange boxes).<i> br-ex</i> is directly attached to the external network physical interface (<i>eth0</i>), whereas GRE tunnel is established on the instance/tunnel network physical interface (<i>eth1</i>) to connect<i> br-tun</i> with its counterpart in the compute node. A number of<i> br-int</i> ports (light-green boxes) are connected to four virtual router interfaces and three DHCP servers. An additional physical interface (<i>eth2</i>) connects the network node to the management network.</div>

Journal of Electrical and Computer Engineering

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Figure 2: Virtual Networking Performance in OpenStack Platform for Network Function Virtualization 