This event is triggered if one or more distributed virtual port groups backing a certain Logical Switch were modified and/or removed. Or if migration of Control plane mode for a Logical Switch/Transport Zone failed. Action required: (1) If the event was triggered due to deletion/modification of backing distributed virtual port groups, then the error will be visible on Logical Switch UI page. Resolve from there will try and create missing distributed virtual port groups for the Logical Switch. (2) If event was triggered due to failure of Control plan mode migration, redo the migration for that Logical Switch or Transport Zone. Frequency of traps: Event is triggered due to user actions as explained in description. Affects: Logical Switch network traffic.