Verify that the network infrastructure and the networking configuration on the ESXi hosts meet the minimum networking requirements for vSAN.

Table 1. Networking Requirements for vSAN
Networking Component Requirement
Host Bandwidth

Each host must have minimum bandwidth dedicated to vSAN.

  • Dedicated 1 Gbps for hybrid configurations
  • Dedicated or shared 10 Gbps for all-flash configurations

For information about networking considerations in vSAN, see Designing the vSAN Network.

Connection between hosts Each host in the vSAN cluster, regardless of whether it contributes capacity, must have a VMkernel network adapter for vSAN traffic. See Set Up a VMkernel Network for vSAN.
Host network All hosts in your vSAN cluster must be connected to a vSAN Layer 2 or Layer 3 network.
IPv4 and IPv6 support The vSAN network supports both IPv4 and IPv6.
Network latency
  • Maximum of 1 ms RTT for standard (non-stretched) vSAN clusters between all hosts in the cluster
  • Maximum of 5 ms RTT between the two main sites for stretched clusters
  • Maximum of 200 ms RTT from a main site to the vSAN witness host