vSAN Health Service - vSAN Network Health – Hosts with LACP issues

Products

• VMware vSAN
• VMware vSphere ESXi

Issue/Introduction

• This article describes how to fix the vSAN Health check issue for LACP

Symptoms:

• The vSAN health check “Hosts with LACP issues” shows a yellow or red alarm.

Cause

• If LACP is enabled on the host but not configured correctly, this health check will show a yellow or red alarm based on the configuration errors.

Resolution

• If this check is showing a warning state, it means the LAG is up but some uplinks are not ready; if this check is in an error state, it means that the LAG is down or no uplink is in a "Bundled" state. The LAG name with its state and physical NIC name with its port state are displayed in the health check details.
  • You can check on the ESXi host as well by running the following command:
    • esxcli network vswitch dvs vmware lacp status get
      • If it shows "Independent", LAG isn't configured. 
• Check if there's no physical cabling issue (not connected, CRC errors, etc).
• Check if the LACP configuration is correct and consistent on both the physical switch and virtual switch.

Additional Information

Refer Document  for LACP/LAG:

 

LACP Support on a vSphere Distributed Switch