vSAN Skyline Health Check - "Hosts with duplicate IP issues" may report an alert if configured with BMC NICs

Products

• VMware vSAN

Issue/Introduction

The KB provides information on the reasons for reporting false alarms and how to diagnose and resolve them

Symptoms:

Hosts running ESXi version prior to 8.0U1 with a BMC (Baseboard Management Controller) NIC may report an alert on the vSAN Health Check - Hosts with duplicate IP issues.

For example, the BMC NICs of Dell and HPE are assigned the default addresses of "***.***.2" and "**.*.**.2" respectively. These types of private pNICs should be skipped in the check.

Environment

VMware vSAN 7.0.x

VMware vSAN 8.0.x

Resolution

Upgrade both vCenter and ESXi to version 8.0U1

Workaround:

If an upgrade is not possible then navigate to vSAN Skyline Health and go to "Hosts with duplicate IP issues" to check for duplicate IP info. In the column Duplicate IP if the IP address is for the BMC NICs, for example, "***.***.*.2" or "**.**.**.2" then this can be safely ignored, and you can silence the alert.