Home > Workload Solutions > SAP > Guides > SAP HANA TDI Guides > Dell Validated Design for SAP HANA TDI with Dell PowerStore Storage > Host connection and setup using NAS/NFS
Each SAP HANA host requires a network connection with 25 Gb/s link speed to the dedicated storage network switches. For redundancy, the connection must have at least two NICs.
With two 25 Gb/s NICs on the SAP HANA hosts, you can optionally configure active/active interface groups on the SAP HANA hosts to use network bonding (bonds), where multiple network interfaces are aggregated into a single logical bonded interface. Hosts that are configured with bonds require MLAG and LACP on the switches.
The following figure shows a sample network topology for eight SAP HANA nodes with two 25 Gb/s NICs, each connected through redundant switches to all four 25 Gb/s IP interface ports on the PowerStore system:
The file systems for the SAP HANA persistence are created on the PowerStore appliance, as described in Creating NAS file systems for the SAP HANA persistence. Add the _netdev mount option when mounting NAS devices. This mount option prevents the system from attempting to mount these file systems until the network has been enabled on the system.
When you install an SAP HANA system, either as a single-node instance or a multinode scale-out cluster, you must automate the mounting of the SAP HANA persistent devices by using /etc/fstab. The mounts must be evenly distributed across the PowerStore IP address of the NAS servers on both PowerStore nodes within the appliance.