You can migrate an environment that uses a collapsed cluster.
In a collapsed cluster design, all management VMs, workload VMs, and optionally edges run on the same vSphere cluster that is prepared for NSX-V. The management VMs of the NSX-T must be initially attached to dvPortgroups. After migration, the management VMs of NSX-T will be attached to NSX-T VLAN segments.
The management VMs in the NSX-T include appliances such as NSX Manager, vCenter Server, VMware Identity Manager, and so on. The NSX-T VLAN segment ports to which these management VMs connect are blocked in two cases: when these management VMs are rebooted after they were migrated in-place by the Migration Coordinator, or when they are moved from NSX-V hosts to NSX-T hosts by vMotion in maintenance migration mode. Therefore, the management VMs might lose connectivity in such cases.
To prevent this problem, create a "management_vms" tag category, and add tags in this category. Assign a tag from this category to all the management VMs in the NSX-T environment. These VMs will be attached to unblocked VLAN segment ports.
- Log in to the vSphere Client.
- Click .
- Click Categories, and then click New to add a category.
Create a category with name management_vms.
- Click the Tags tab and add a tag in the management_vms category.
- Navigate to .
- Expand the collapsed cluster from the left Navigator view, right-click the name of the NSX Manager VM, and select .
- Assign a tag from the management_vms category to the NSX Manager VM.
- Repeat steps 6 and 7 for all the management VMs in the cluster.
For a detailed information about tag categories and tags, see the vCenter Server and Host Management documentation.
- Log in to NSX Manager.
- Navigate to Virtual Machine Tag equals management_vms. and create a group with the membership criteria
- Navigate to and add this group.