For both conserving network resources and ensuring that network administrators understand the needs for networks and public IP addresses for accessing the APIs and VMs as necessary, this section offers recommendations and required minimum sizes. Throughput of at least 1000 Mbps is suggested. This walkthrough shows network configurations for a single server. For OpenStack Compute, networking is configured on multi-node installations between the physical machines on a single subnet. For networking between virtual machine instances, three network options are available: flat, DHCP, and VLAN. Two NICs (Network Interface Cards) are recommended on the server running nova-network. Management Network (RFC1918 IP Range, not publicly routable): This network is utilized for all inter-server communications within the cloud infrastructure. Recommended size: 255 IPs (CIDR /24) Public Network (Publicly routable IP range): This network is utilized for providing Public IP accessibility to the API endpoints within the cloud infrastructure. Minimum size: 8 IPs (CIDR /29) VM Network (RFC1918 IP Range, not publicly routable): This network is utilized for providing primary IP addresses to the cloud instances. Recommended size: 1024 IPs (CIDR /22) Floating IP network (Publicly routable IP Range): This network is utilized for providing Public IP accessibility to selected cloud instances. Minimum size: 16 IPs (CIDR /28)