You can configure Network I/O Control for a vSAN cluster.

Consider a vSAN cluster with a single 10 GbE physical adapter. This NIC handles traffic for vSAN, vSphere vMotion, and virtual machines. To change the shares value for a traffic type, select that traffic type from the System Traffic view (VDS > Configure > Resource Allocation > System Traffic), and click Edit. The shares value for vSAN traffic has been changed from the default of Normal/50 to High/100.

Edit the other traffic types to match the share values shown in the table.

Table 1. Sample NIOC Settings

Traffic Type

Shares

Value

vSAN

High

100

vSphere vMotion

Low

25

Virtual machine

Normal

50

iSCSI/NFS

Low

25

If the 10 GbE adapter becomes saturated, Network I/O Control allocates 5 Gbps to vSAN on the physical adapter, 3.5 Gbps to vMotion, and 1.5 Gbps to virtual machine traffic. Use these values as a starting point to configure NIOC configuration on your vSAN network. Ensure that vSAN has the highest priority of any protocol.

For more details about the various parameters for bandwidth allocation, see vSphere Networking documentation.

With each of the vSphere editions for vSAN, VMware provides a vSphere Distributed Switch as part of the edition. Network I/O Control can be configured with any vSAN edition.