|Plan Your Installation / Plan Networking Modes|
Static mode is similar to System mode but offers you more control over instance IP address assignment.
In Static mode, you configure Eucalyptus with a map of MAC address/IP Address pairs. When a VM is instantiated, Eucalyptus sets up a static entry within a Eucalyptus controlled DHCP server, takes the next free MAC/IP pair, assigns it to an instance, and attaches the instance’s ethernet device to the physical ethernet through the bridge on the NCs (in a manner similar to System mode). This mode is useful for administrators who have a pool of MAC/IP addresses that they wish to always assign to their VMs.
In this mode, Eucalyptus manages VM IP address assignment by maintaining its own DHCP server with one static entry per VM. Static mode requires the Eucalyptus administrator to specify the network configuration each VM should receive from the Eucalyptus DHCP server running on the same physical server as the CC component.