The duration for the NSX-T upgrade process depends on the number of components you have to upgrade in your infrastructure. It is important to understand the operational state of NSX-T components during an upgrade, such as when some hosts have been upgraded, or when NSX Edge nodes have not been upgraded.

The upgrade process is as follows:

Hosts > NSX Edge clusters > NSX Controller cluster > Management plane.

Hosts Upgrade

During Upgrade

After Upgrade

  • VM migration is required for the following scenarios:

    • VMs running on a host not managed by a vCenter Server that is part of NSX-T.

    • VMs running on a host managed by a vCenter Server that is part of NSX-T and the cluster does not have fully Automated DRS.

    • VMs running on a host managed by a vCenter Server that is part of NSX-T and the cluster has fully Automated DRS.

    The VMs are migrated and NSX-T bits on host are upgraded.

  • VM migration not required for VMs running on a host, which are or are not be managed by a vCenter Server that is part of NSX-T. Minor network disruption occurs for VMs during upgrade.

  • For KVM, the upgrade takes place while workloads are running and VMs are powered on. During the upgrade, you might experience a brief traffic disruption.

  • Configuration changes are allowed on NSX Manager.

  • Packet forwarding is briefly affected on the host currently undergoing an upgrade.

  • Upgraded hosts are compatible with non-upgraded hosts, NSX Edge clusters, NSX Controller cluster, and Management plane.

  • New features introduced in the upgrade are not configurable until the NSX Edge clusters, NSX Controller cluster, and Management plane are upgraded.

NSX Edge Clusters Upgrade

During Upgrade

After Upgrade

  • During the NSX Edge upgrade, you might experience the following traffic interruption:

    • The north-south datapath is affected if the NSX Edge is part of the datapath.

    • Temporary Layer 2 and Layer 3 interruption.

  • Configuration changes are not blocked on NSX Manager but might be delayed.

  • Packet forwarding might be temporarily affected.

  • Configuration changes are allowed.

  • Upgraded NSX Edge clusters are compatible with only the upgraded NSX Controller cluster and Management plane.

  • New features introduced in the upgrade are not configurable until the NSX Controller cluster and Management plane are upgraded.

NSX Controller Cluster Upgrade

During Upgrade

After Upgrade

  • Configuration changes are not blocked on NSX Manager but might be delayed.

  • Configuration changes are allowed.

  • Upgraded NSX Controller clusters are compatible with only the upgraded NSX Edge clusters and Management plane.

  • New features introduced in the upgrade are not configurable until the Management plane is upgraded.

Management Plane Upgrade

During Upgrade

After Upgrade

  • Configuration changes are blocked on the Management plane.

  • API service is unavailable.

  • User interface is unavailable for a short period.

  • Configuration changes are allowed.

  • New features introduced in the upgrade are configurable.