vSAN Health Service – Online Health – Proper vSAN network traffic shaping policy is configured

Products

• VMware vSAN

Issue/Introduction

Symptoms:
You will receive a vSAN health warning notification from vSAN health UI with health check name "Proper vSAN network traffic shaping policy is configured".

Environment

VMware vSAN 7.0.x
VMware vSAN 6.0.x

Cause

Each host must have minimum bandwidth dedicated to vSAN, which is:

• For Hybrid configurations: dedicated 1 Gbps
• For All-Flash configurations: dedicated or shared 10 Gbps
• For ESA architecture: minimum 25 Gbps

See Networking Requirements for vSAN document

Traffic shaping restricts the network bandwidth available on a port, but can also be configured to allow bursts of traffic to flow through at higher speeds. Improper traffic shaping policy on vSAN network might impact the vSAN I/O performance. Hence, this health check is to validate the traffic shaping policy on vSAN network, and make sure the policy is compliant with the minimum networking requirements of vSAN.

Resolution

To resolve this issue update the traffic shaping policy on vSAN network. see Traffic Shaping Policy guide.

Note: The average bandwidth should be larger than the minimum networking requirements of vSAN.