Installation Guide

network. The Foundation base appliance and the Enterprise appliance access vCenter Server
and the HP 3PAR storage system over this network.
Three or more vCenter Server are supported.
◦ The Foundation base appliance uses this network to access the vCenter Server that is
managing the management hypervisor.
◦ The vCenter proxy appliance uses this network to access the vCenter Server that is
managing ESX compute clusters. This can be a separate vCenter Server or the same
vCenter Server used by the Foundation base appliance.
◦ The Enterprise appliance also uses this network to access vCenter Server. Enterprise can
be configured to use a third vCenter Server, or it can access one of the two existing
vCenter Servers.
• Cloud Management Network: This private network for the cloud is typically a VLAN, but could
also be a physical network. The Foundation base appliance runs a DHCP server for this
network.
IMPORTANT: The Cloud Management Network should be a dedicated private network for
Cloud System Management use only. Some of the contents transmitted between compute nodes
and the cloud controller are unencrypted. Network isolation should be used to prevent unwanted
exposure to sensitive data.
• External Network: This network is automatically connected to the network node appliances
after Cloud Networking settings are saved during the CloudSystem Console first time setup.
Subnets must be defined in the CloudSystem Portal before using this network.
Virtual machines are not connected directly to this network. Internal provider or private networks
connect directly to a virtual machine, then a virtual router is used to connect the internal and
external networks. A networking service routes outgoing traffic to the External Network. When
the External Network subnet assigns Floating IPs to virtual machines, then the External Network
can access them.
Cloud Data Trunk
This network must be configured as a group of VLANs. It hosts the VLANs that OpenStack networking
makes available to users. CloudSystem uses specific VLANs on this trunk as Private Networks.
Some VLANs may not be dedicated to CloudSystem. All compute nodes in the cloud must be
connected to this network.
The Cloud Data Trunk contains the following production networks.
• Provider Network: A Provider Network is a data center network routed through the existing
data center infrastructure. Adding a Provider Network allows you to add an existing data
center network to any number of virtual machine instances in the cloud.
• Private Networks: Private Networks are created from a pool of VLANs. The cloud administrator
configures this pool in the CloudSystem Console. Then, when the cloud administrator switches
to the CloudSystem Portal and creates a Private Networks, the OpenStack Neutron networking
service assigns a VLAN from the pool.
OpenStack Neutron networking manages all aspects of this network, including external routing.
IMPORTANT: All of the networks described above must be distinct networks, with the exception
of the External Network. You can use the same network for the External Network and the Data
Center Management Network.
Configuration of management networks
Management network configuration varies depending on the management hypervisor configuration.
18 HP CloudSystem installation prerequisites