## Example system designs Omnia can configure systems which use Ethernet or Infiniband-based fabric to connect the compute servers.   ## Network Setup Omnia assumes that servers are already connected to the network and have access to the internet. ### Network Topology Possible network configurations include: * A flat topology where all nodes are connected to a switch which includes an uplink to the internet. This requires multiple externally-facing IP addresses * A hierarchical topology where compute nodes are connected to a common switch, but the manager node contains a second network connection which is connected to the internet. All outbound/inbound traffic would be routed through the manager node. This requires setting up firewall rules for IP masquerade, see [here](https://www.server-world.info/en/note?os=CentOS_7&p=firewalld&f=2) for an example. ### IP and Hostname Assignment The recommended setup is to assign IP addresses to individual servers. This can be done manually by logging onto each node, or via DHCP.