While upgrading NSX-T, the Pre-checks reports the following warning : "The current order of edge nodes in group xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx is not optimal for Tier0 down time. Kindly reset plan for system to recalculate the order"

Products

• VMware NSX

Issue/Introduction

• While Upgrading NSX-T, the Pre-checks reports the following warning with respect to the Edge Nodes as seen on the GUI :

The current order of edge nodes in group xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx is not optimal for Tier0 down time. Kindly reset plan for system to recalculate the order

Environment

• VMware NSX v3.x, v4.x

Cause

• This issue occurs when the default Edge Grouping is changed, then the Edge Pre-checks are run again.
• Due to the grouping change, the Edge node with the active logical router(s) becomes the first to be upgraded, this will entail a failover to the standby and again when the standby is upgraded, this leads to an extra failover during the upgrade.
• The default grouping, will ensure the standby is upgraded first, then a failover will occur and the active will be upgraded, thus only incurring one failover event.

Resolution

• To resolve the above, there is an option called "Reset to Default" as seen in the below via the GUI :

• While clicking the above Option, the Edges in the Upgrade Groups are arranged in such a manner that the Edge Nodes hosting the Standby LRs get first in the list to be Upgraded.
• Post hitting the above Option, perform the Pre-checks again and the warning should have disappeared.