Home > Workload Solutions > SAP > Guides > Dell Validated Design for High Availability for SAP with Red Hat Pacemaker Clusters > Network architecture
In network architecture, redundancy refers to the installation of additional devices to ensure availability in the case of device failure. Dell Technologies recommends using at least two separate networks on an HA configuration. The first network is for the communication between servers, and the second network is for SAP HANA system replication (HSR) as a secondary cluster communication path.
The following figure shows a redundant network architecture: