Network Topology: Hybrid Setup
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.. note:: The following diagram is for representational purposes only.

.. image:: ../../images/Hybird_Network_2.1_rc1.jpg

In a **Hybrid Setup**, the OIM and special nodes such as the head and login node are connected to the public network, while the iDRAC and the compute nodes use a shared LOM network.

* **Public Network (Blue line)**: This indicates the external public network which is connected to the internet. NIC2 of the OIM, Service cluster nodes, Head node, Service Kubernetes node, and Login node [optional] is connected to the public network. Along with this, BMC NIC of the Head node is connected.

* **Admin Network and BMC network (Green line)**: This indicates the admin network and the BMC network utilized by Omnia to provision the cluster nodes and to control the cluster nodes using out-of-band management. NIC1 of all the nodes are connected to the private switch.

* **Infiniband Network (Yellow Line)**: This indicates the high-speed InfiniBand network used for high throughput inter-node communication in the cluster.

.. note:: Omnia supports classless IP addressing, which allows the Admin network, BMC network, Public network, and the Additional network to be assigned different subnets.

**Recommended discovery mechanism**

* `Discovery Mechanisms <../../OmniaInstallGuide/RHEL_new/Provision/discover_mechanism_mappingfile.html>`_ (OME-based BMC Discovery is recommended)