https://www.cisco.com/c/en/us/support/docs/field-notices/723/fn72340.html
Field Notice: FN - 72340 - After an Upgrade, the Leaf Switch Brings Up Ports Before the Policies...
Cisco has recently identified a defect (Cisco bug ID CSCvr75413) in the Cisco Application Centric Infrastructure (ACI). After a leaf switch is upgraded, the...