Networks, subnets, and ports make up the foundation of Neutron's logical network architecture. A network describes a layer 2 segment, and is typically used to define a boundary such as a VLAN. A subnet is an IPv4 or IPv6 address block that is associated with the network. Networks can be associated with one or more subnets. Lastly, a port represents a switch port on a logical switch that spans the entire cloud. A port object contains information about the device it is associated with, including its MAC addresses, IP addresses, and device ID. A device could be a virtual machine instance interface, a virtual router interface, or some other device that will be connected to the virtual network.
Network objects in OpenStack have many attributes that describe how that network connects the physical and virtual infrastructures. The following table describes a few of these details:
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This describes the physical... |