Oracle Exadata supports network partitioning using a variety of mechanisms.

• VLAN Support on Customer-Facing Networks
  Oracle Exadata can use VLANs to implement network partitioning in conjunction with the client, backup, administration, and ILOM networks.
• Access VLAN Support with RoCE Network Fabric
  Oracle Exadata can use Access VLAN settings to implement server-level isolation across the RoCE Network Fabric.
• Using Exadata Secure RDMA Fabric Isolation
  
• Using InfiniBand Partitioning for Network Isolation with InfiniBand Network Fabric
  An InfiniBand partition defines a group of InfiniBand nodes or members that are allowed to communicate with one another.