This chapter saw us installing and configuring the Neutron Open vSwitch mechanism driver and agent on two compute nodes and a dedicated network node, which will be used for distributed virtual routing functions at a later time. Instances scheduled to compute02 and compute03 will leverage Open vSwitch virtual network components, while compute01 and network services on controller01 will leverage Linux bridges.
Both the Linux bridge and Open vSwitch drivers and agents for Neutron provide unique solutions to the same problem of connecting virtual machine instances to the network. The use of Open vSwitch relies on flow rules to determine how traffic in and out of the environment should be processed and requires both user space utilities and kernel modules to perform such actions. On the other hand, the use of Linux bridges requires the 8021q and bridge kernel modules and relies...