After you have migrated the configuration, you can migrate the vSphere hosts to NSX-T Data Center.

You can configure several settings related to the host migration, including migration order and enabling hosts. Before you change any default settings, make sure that you understand the effects of these settings. See Configuring vSphere Host Migration for more information.

Caution: There is a traffic interruption during the host migration. Perform this step during a maintenance window.

If migration fails for a host, the migration pauses after all in-progress host migrations finish. When you have resolved the problem with the host, click Retry to retry migration of the failed host.

If migration fails for a host, you can move its host group to the bottom of the list of groups. The migration of other host groups can proceed while you resolve the problem with the failed host.

Prerequisites

  • Verify that all ESXi hosts are in an operational state. Address any problems with hosts including disconnected states. There must be no pending reboots or pending tasks for entering maintenance mode.

Procedure

  1. On the Migrate Hosts page, click Start.

    If you selected the In-Place or Automated Maintenance migration mode for all hosts groups, the host migration starts.

  2. If you selected the Manual Maintenance migration mode for any host groups, you must complete one of the following tasks for each VM so that the hosts can enter maintenance mode.
    Option Action
    Power off or suspend VMs.
    1. Right click the VM and select Power > Power off , Power > Shut Down Guest OS, or Power > Suspend.
    2. After the host has migrated, attach the VM interfaces to the appropriate NSX-T segments and power on the VM.
    Move VMs using vMotion.
    1. Right click the VM and select Migrate. Follow the prompts to move the VM to a different host.
    Move VMs using cold migration.
    1. Right click the VM and select Power > Power off , Power > Shut Down Guest OS, or Power > Suspend.
    2. Right click the VM and select Migrate. Follow the prompts to move the VM to a different host, connecting the VM interfaces to the appropriate NSX-T segments.

Results

After a host has migrated to NSX-T using In-Place migration mode, you might see a critical alarm with message Network connectivity lost. This alarm occurs when a vSphere Distributed Switch (VDS) 6.5 or 6.7 migrates to an N-VDS because the host no longer has a physical NIC connected to the VDS it was previously connected to. To restore the migrated hosts to the Connected state, click Reset to Green on each host, and suppress the warnings, if any.

If migration fails for a host, the migration pauses after all in-progress host migrations finish. When you have resolved the problem with the host, click Retry to retry migration of the failed host.

If migration fails for a host, you can move its host group to the bottom of the list of groups. The migration of other host groups can proceed while you resolve the problem with the failed host.

For information about troubleshooting other host migration problems, see Troubleshooting NSX Data Center for vSphere Migration.