A look at our environment

In the previous chapter, we created multiple Neutron networks that launched a series of automated events, including:

• The creation of network namespaces
• The startup of DHCP services for each network
• The connecting of each namespace to the virtual switch
• The configuration of virtual switch ports

The following commands are useful in seeing how the virtual network infrastructure is represented on the host:

Command	Purpose
ovs-vsctl show	Shows all virtual switches on the host
ovs-vsctl dump-flows <bridge>	Shows the flow rules for the specified bridge
ovs-vsctl add-br <bridge>	Creates a virtual switch
ovs-vsctl add-port <bridge> <interface>	Adds an interface to a virtual switch
ovs-vsctl list-ports <bridge>	Lists the ports of a virtual switch
ovs-ofctl show <bridge>	Lists the ports of a virtual switch with details

Tip

There is a lot of useful information for each of these commands hidden in their respective man pages...