Product : Dell EMC, VxRail [HCI]/4.7.300, x86
Feature : SC Configuration, Disaster Recovery, Data Availability
Content Owner:  Herman Rutten
Summary
3-sites: two active sites + tie-breaker in 3rd site
Details
The use of the Stretched Cluster Witness Appliance automates failover decisions in order to avoid split-brain scenarios like network partitions and remote site failures. The witness is deployed as a VM within a third site.

vSAN 6.7 introduces the option to configure a dedicated VMkernel NIC for witness traffic. This enhances data security because witness traffic is isolated from vSAN data traffic.