Route based on physical NIC load policy does not work as expected

Products

• VMware vSphere ESXi
• VMware vSphere ESX 8.x

Issue/Introduction

• 'Route based on physical NIC load' loadbalancing policy does not work as expected on the ESXi with multiple uplinks.
• Issue is observed in VMware ESXi 8.x version
• The traffic exceeds 75% of vmnic's capacity. However, the load balancing doesn't occur
• If we run net-lbt -v from the ESXi host manually, it reports the vmnic is saturated and the NIC failover works

Environment

VMware vSphere ESXi 8.x

Cause

The 'net-lbt' daemon does not function correctly, due to stricter security policy enforcement in ESXi 8.0. It does work once when manually running net-lbt -v command from the ESXi host.

Resolution

This issue has been addressed in VMware vSphere ESXi 8.0 Update 3e.

Additional Information

If the issue persists after upgrading to ESXi 8.0 U3e or later, open a support ticket with Broadcom Support.

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