LACP up delay timer(TeamPolicyUpdelay) is triggered if ESXi LACP configuration is completed before physical switch

Products

• VMware vCenter Server
• VMware vSphere ESXi

Issue/Introduction

• If the LACP configuration on vCenter and ESXi is completed before configuring the channel group on the physical switch, it will trigger the LACP "up delay" timer.

• This is an expected behavior, as the LACP negotiation cannot complete until both ends (ESXi and physical switch) are properly configured.

Environment

VMware vCenter Server 8.X
VMware vSphere ESXi 8.X

Cause

This behavior is caused by the fact that vCenter has no visibility into the physical switch's LACP configuration, specifically, whether multiple ports have been properly bound into a channel group. Thus, the value set for the advance setting parameter TeamPolicyUpdelay is triggered and the delay is expected.

It's important to note that this timer is not applied during the initial LAG creation, such as during host reboot, but takes effect for subsequent LAG operations (e.g., reconfiguration or uplink changes).

Resolution

This is expected behavior.