A vCenter Server virtual machine runs on ESXi host "Alpha 1." That host network is configured with vSphere Standard Switch and an administrator wants to migrate the host to a vSphere Distributed Switc

config.vpxd.network.rollback is a vCenter Server advanced setting, not an ESXi host advanced setting, so applying it at the host level has no effect on migration behavior.

Setting the vCenter Server advanced setting to TRUE preserves the default rollback behavior that is already blocking the migration, so it does not resolve the failure.

This option targets the ESXi host rather than vCenter Server, which is the wrong scope for this setting, and enabling it would not disable the rollback that is causing the failure.

The config.vpxd.network.rollback setting lives on vCenter Server and when set to FALSE it disables the automatic rollback mechanism that vCenter uses to protect management network connectivity during switch migrations. With only one physical NIC, vCenter detects the risk of losing host management access and triggers a rollback by default. Setting this to FALSE on vCenter Server removes that block and allows the single-NIC migration to proceed.